ci: Add kernel checkers #5

quic-viskuma · 2025-05-19T16:33:38Z

Integrate kernel specific checkers -

check-uapi-headers : Ensures UAPI headers are consistent
sparse-check : Runs sparse static analysis
checkpatch : Runs checkpatch.pl to validate patch formatting
dt-binding-check : Validates devicetree bindings
dtb-check : Checks compiled device tree blobs

Reference - https://github.com/qualcomm-linux/kernel-checkers

.github/workflows/kernel_checkers.yml

Integrate kernel specific checkers - check-uapi-headers, sparse-check, checkpatch, dt-binding-check and dtb-check https://github.com/qualcomm-linux/kernel-checkers Signed-off-by: VISHAL KUMAR <viskuma@qti.qualcomm.com>

anshulg-qti

A round of review/refactoring done on this. We can go ahead and do any improvements in follow on PRs

quic-nasserg

LGTM

Add reusable kernel checker workflows as action Signed-off-by: Vishal Kumar <viskuma@qti.qualcomm.com>

anshulg-qti · 2025-05-23T06:35:03Z

@njjetha -- discussed with @shashim-quic, and Kernel integration. We can go ahead and merge this to make progress on the CI and further refinements can be taken up in next PR. Pls help merge

When reconnecting a channel in smb2_reconnect_server(), a dummy tcon is passed down to smb2_reconnect() with ->query_interface uninitialized, so we can't call queue_delayed_work() on it. Fix the following warning by ensuring that we're queueing the delayed worker from correct tcon. WARNING: CPU: 4 PID: 1126 at kernel/workqueue.c:2498 __queue_delayed_work+0x1d2/0x200 Modules linked in: cifs cifs_arc4 nls_ucs2_utils cifs_md4 [last unloaded: cifs] CPU: 4 UID: 0 PID: 1126 Comm: kworker/4:0 Not tainted 6.16.0-rc3 #5 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-4.fc42 04/01/2014 Workqueue: cifsiod smb2_reconnect_server [cifs] RIP: 0010:__queue_delayed_work+0x1d2/0x200 Code: 41 5e 41 5f e9 7f ee ff ff 90 0f 0b 90 e9 5d ff ff ff bf 02 00 00 00 e8 6c f3 07 00 89 c3 eb bd 90 0f 0b 90 e9 57 f> 0b 90 e9 65 fe ff ff 90 0f 0b 90 e9 72 fe ff ff 90 0f 0b 90 e9 RSP: 0018:ffffc900014afad8 EFLAGS: 00010003 RAX: 0000000000000000 RBX: ffff888124d99988 RCX: ffffffff81399cc1 RDX: dffffc0000000000 RSI: ffff888114326e00 RDI: ffff888124d999f0 RBP: 000000000000ea60 R08: 0000000000000001 R09: ffffed10249b3331 R10: ffff888124d9998f R11: 0000000000000004 R12: 0000000000000040 R13: ffff888114326e00 R14: ffff888124d999d8 R15: ffff888114939020 FS: 0000000000000000(0000) GS:ffff88829f7fe000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe7a2b4038 CR3: 0000000120a6f000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> queue_delayed_work_on+0xb4/0xc0 smb2_reconnect+0xb22/0xf50 [cifs] smb2_reconnect_server+0x413/0xd40 [cifs] ? __pfx_smb2_reconnect_server+0x10/0x10 [cifs] ? local_clock_noinstr+0xd/0xd0 ? local_clock+0x15/0x30 ? lock_release+0x29b/0x390 process_one_work+0x4c5/0xa10 ? __pfx_process_one_work+0x10/0x10 ? __list_add_valid_or_report+0x37/0x120 worker_thread+0x2f1/0x5a0 ? __kthread_parkme+0xde/0x100 ? __pfx_worker_thread+0x10/0x10 kthread+0x1fe/0x380 ? kthread+0x10f/0x380 ? __pfx_kthread+0x10/0x10 ? local_clock_noinstr+0xd/0xd0 ? ret_from_fork+0x1b/0x1f0 ? local_clock+0x15/0x30 ? lock_release+0x29b/0x390 ? rcu_is_watching+0x20/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x15b/0x1f0 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> irq event stamp: 1116206 hardirqs last enabled at (1116205): [<ffffffff8143af42>] __up_console_sem+0x52/0x60 hardirqs last disabled at (1116206): [<ffffffff81399f0e>] queue_delayed_work_on+0x6e/0xc0 softirqs last enabled at (1116138): [<ffffffffc04562fd>] __smb_send_rqst+0x42d/0x950 [cifs] softirqs last disabled at (1116136): [<ffffffff823d35e1>] release_sock+0x21/0xf0 Cc: linux-cifs@vger.kernel.org Reported-by: David Howells <dhowells@redhat.com> Fixes: 42ca547 ("cifs: do not disable interface polling on failure") Reviewed-by: David Howells <dhowells@redhat.com> Tested-by: David Howells <dhowells@redhat.com> Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com> Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Steve French <stfrench@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>

…terface collect_md property on xfrm interfaces can only be set on device creation, thus xfrmi_changelink() should fail when called on such interfaces. The check to enforce this was done only in the case where the xi was returned from xfrmi_locate() which doesn't look for the collect_md interface, and thus the validation was never reached. Calling changelink would thus errornously place the special interface xi in the xfrmi_net->xfrmi hash, but since it also exists in the xfrmi_net->collect_md_xfrmi pointer it would lead to a double free when the net namespace was taken down [1]. Change the check to use the xi from netdev_priv which is available earlier in the function to prevent changes in xfrm collect_md interfaces. [1] resulting oops: [ 8.516540] kernel BUG at net/core/dev.c:12029! [ 8.516552] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 8.516559] CPU: 0 UID: 0 PID: 12 Comm: kworker/u80:0 Not tainted 6.15.0-virtme #5 PREEMPT(voluntary) [ 8.516565] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 8.516569] Workqueue: netns cleanup_net [ 8.516579] RIP: 0010:unregister_netdevice_many_notify+0x101/0xab0 [ 8.516590] Code: 90 0f 0b 90 48 8b b0 78 01 00 00 48 8b 90 80 01 00 00 48 89 56 08 48 89 32 4c 89 80 78 01 00 00 48 89 b8 80 01 00 00 eb ac 90 <0f> 0b 48 8b 45 00 4c 8d a0 88 fe ff ff 48 39 c5 74 5c 41 80 bc 24 [ 8.516593] RSP: 0018:ffffa93b8006bd30 EFLAGS: 00010206 [ 8.516598] RAX: ffff98fe4226e000 RBX: ffffa93b8006bd58 RCX: ffffa93b8006bc60 [ 8.516601] RDX: 0000000000000004 RSI: 0000000000000000 RDI: dead000000000122 [ 8.516603] RBP: ffffa93b8006bdd8 R08: dead000000000100 R09: ffff98fe4133c100 [ 8.516605] R10: 0000000000000000 R11: 00000000000003d2 R12: ffffa93b8006be00 [ 8.516608] R13: ffffffff96c1a510 R14: ffffffff96c1a510 R15: ffffa93b8006be00 [ 8.516615] FS: 0000000000000000(0000) GS:ffff98fee73b7000(0000) knlGS:0000000000000000 [ 8.516619] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8.516622] CR2: 00007fcd2abd0700 CR3: 000000003aa40000 CR4: 0000000000752ef0 [ 8.516625] PKRU: 55555554 [ 8.516627] Call Trace: [ 8.516632] <TASK> [ 8.516635] ? rtnl_is_locked+0x15/0x20 [ 8.516641] ? unregister_netdevice_queue+0x29/0xf0 [ 8.516650] ops_undo_list+0x1f2/0x220 [ 8.516659] cleanup_net+0x1ad/0x2e0 [ 8.516664] process_one_work+0x160/0x380 [ 8.516673] worker_thread+0x2aa/0x3c0 [ 8.516679] ? __pfx_worker_thread+0x10/0x10 [ 8.516686] kthread+0xfb/0x200 [ 8.516690] ? __pfx_kthread+0x10/0x10 [ 8.516693] ? __pfx_kthread+0x10/0x10 [ 8.516697] ret_from_fork+0x82/0xf0 [ 8.516705] ? __pfx_kthread+0x10/0x10 [ 8.516709] ret_from_fork_asm+0x1a/0x30 [ 8.516718] </TASK> Fixes: abc340b ("xfrm: interface: support collect metadata mode") Reported-by: Lonial Con <kongln9170@gmail.com> Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

…rnal() A crash was observed with the following output: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 2899 Comm: syz.2.399 Not tainted 6.17.0-rc5+ #5 PREEMPT(none) RIP: 0010:trace_kprobe_create_internal+0x3fc/0x1440 kernel/trace/trace_kprobe.c:911 Call Trace: <TASK> trace_kprobe_create_cb+0xa2/0xf0 kernel/trace/trace_kprobe.c:1089 trace_probe_create+0xf1/0x110 kernel/trace/trace_probe.c:2246 dyn_event_create+0x45/0x70 kernel/trace/trace_dynevent.c:128 create_or_delete_trace_kprobe+0x5e/0xc0 kernel/trace/trace_kprobe.c:1107 trace_parse_run_command+0x1a5/0x330 kernel/trace/trace.c:10785 vfs_write+0x2b6/0xd00 fs/read_write.c:684 ksys_write+0x129/0x240 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x5d/0x2d0 arch/x86/entry/syscall_64.c:94 </TASK> Function kmemdup() may return NULL in trace_kprobe_create_internal(), add check for it's return value. Link: https://lore.kernel.org/all/20250916075816.3181175-1-wangliang74@huawei.com/ Fixes: 33b4e38 ("tracing: kprobe-event: Allocate string buffers from heap") Signed-off-by: Wang Liang <wangliang74@huawei.com> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Phil reported a boot failure once sheaves become used in commits 59faa4d ("maple_tree: use percpu sheaves for maple_node_cache") and 3accabd ("mm, vma: use percpu sheaves for vm_area_struct cache"): BUG: kernel NULL pointer dereference, address: 0000000000000040 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 21 UID: 0 PID: 818 Comm: kworker/u398:0 Not tainted 6.17.0-rc3.slab+ #5 PREEMPT(voluntary) Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.26.0 07/30/2025 RIP: 0010:__pcs_replace_empty_main+0x44/0x1d0 Code: ec 08 48 8b 46 10 48 8b 76 08 48 85 c0 74 0b 8b 48 18 85 c9 0f 85 e5 00 00 00 65 48 63 05 e4 ee 50 02 49 8b 84 c6 e0 00 00 00 <4c> 8b 68 40 4c 89 ef e8 b0 81 ff ff 48 89 c5 48 85 c0 74 1d 48 89 RSP: 0018:ffffd2d10950bdb0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8a775dab74b0 RCX: 00000000ffffffff RDX: 0000000000000cc0 RSI: ffff8a6800804000 RDI: ffff8a680004e300 RBP: ffffd2d10950be40 R08: 0000000000000060 R09: ffffffffb9367388 R10: 00000000000149e8 R11: ffff8a6f87a38000 R12: 0000000000000cc0 R13: 0000000000000cc0 R14: ffff8a680004e300 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8a77a3541000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000040 CR3: 0000000e1aa24000 CR4: 00000000003506f0 Call Trace: <TASK> ? srso_return_thunk+0x5/0x5f ? vm_area_alloc+0x1e/0x60 kmem_cache_alloc_noprof+0x4ec/0x5b0 vm_area_alloc+0x1e/0x60 create_init_stack_vma+0x26/0x210 alloc_bprm+0x139/0x200 kernel_execve+0x4a/0x140 call_usermodehelper_exec_async+0xd0/0x190 ? __pfx_call_usermodehelper_exec_async+0x10/0x10 ret_from_fork+0xf0/0x110 ? __pfx_call_usermodehelper_exec_async+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: CR2: 0000000000000040 ---[ end trace 0000000000000000 ]--- RIP: 0010:__pcs_replace_empty_main+0x44/0x1d0 Code: ec 08 48 8b 46 10 48 8b 76 08 48 85 c0 74 0b 8b 48 18 85 c9 0f 85 e5 00 00 00 65 48 63 05 e4 ee 50 02 49 8b 84 c6 e0 00 00 00 <4c> 8b 68 40 4c 89 ef e8 b0 81 ff ff 48 89 c5 48 85 c0 74 1d 48 89 RSP: 0018:ffffd2d10950bdb0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8a775dab74b0 RCX: 00000000ffffffff RDX: 0000000000000cc0 RSI: ffff8a6800804000 RDI: ffff8a680004e300 RBP: ffffd2d10950be40 R08: 0000000000000060 R09: ffffffffb9367388 R10: 00000000000149e8 R11: ffff8a6f87a38000 R12: 0000000000000cc0 R13: 0000000000000cc0 R14: ffff8a680004e300 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8a77a3541000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000040 CR3: 0000000e1aa24000 CR4: 00000000003506f0 Kernel panic - not syncing: Fatal exception Kernel Offset: 0x36a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) ---[ end Kernel panic - not syncing: Fatal exception ]--- And noted "this is an AMD EPYC 7401 with 8 NUMA nodes configured such that memory is only on 2 of them." # numactl --hardware available: 8 nodes (0-7) node 0 cpus: 0 8 16 24 32 40 48 56 64 72 80 88 node 0 size: 0 MB node 0 free: 0 MB node 1 cpus: 2 10 18 26 34 42 50 58 66 74 82 90 node 1 size: 31584 MB node 1 free: 30397 MB node 2 cpus: 4 12 20 28 36 44 52 60 68 76 84 92 node 2 size: 0 MB node 2 free: 0 MB node 3 cpus: 6 14 22 30 38 46 54 62 70 78 86 94 node 3 size: 0 MB node 3 free: 0 MB node 4 cpus: 1 9 17 25 33 41 49 57 65 73 81 89 node 4 size: 0 MB node 4 free: 0 MB node 5 cpus: 3 11 19 27 35 43 51 59 67 75 83 91 node 5 size: 32214 MB node 5 free: 31625 MB node 6 cpus: 5 13 21 29 37 45 53 61 69 77 85 93 node 6 size: 0 MB node 6 free: 0 MB node 7 cpus: 7 15 23 31 39 47 55 63 71 79 87 95 node 7 size: 0 MB node 7 free: 0 MB Linus decoded the stacktrace to get_barn() and get_node() and determined that kmem_cache->node[numa_mem_id()] is NULL. The problem is due to a wrong assumption that memoryless nodes only exist on systems with CONFIG_HAVE_MEMORYLESS_NODES, where numa_mem_id() points to the nearest node that has memory. SLUB has been allocating its kmem_cache_node structures only on nodes with memory and so it does with struct node_barn. For kmem_cache_node, get_partial_node() checks if get_node() result is not NULL, which I assumed was for protection from a bogus node id passed to kmalloc_node() but apparently it's also for systems where numa_mem_id() (used when no specific node is given) might return a memoryless node. Fix the sheaves code the same way by checking the result of get_node() and bailing out if it's NULL. Note that cpus on such memoryless nodes will have degraded sheaves performance, which can be improved later, preferably by making numa_mem_id() work properly on such systems. Fixes: 2d517aa ("slab: add opt-in caching layer of percpu sheaves") Reported-and-tested-by: Phil Auld <pauld@redhat.com> Closes: https://lore.kernel.org/all/20251010151116.GA436967@pauld.westford.csb/ Analyzed-by: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/all/CAHk-%3Dwg1xK%2BBr%3DFJ5QipVhzCvq7uQVPt5Prze6HDhQQ%3DQD_BcQ@mail.gmail.com/ Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

With CONFIG_PROVE_RCU_LIST=y and by executing $ netcat -l --sctp & $ netcat --sctp localhost & $ ss --sctp one can trigger the following Lockdep-RCU splat(s): WARNING: suspicious RCU usage 6.18.0-rc1-00093-g7f864458e9a6 #5 Not tainted ----------------------------- net/sctp/diag.c:76 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by ss/215: #0: ffff9c740828bec0 (nlk_cb_mutex-SOCK_DIAG){+.+.}-{4:4}, at: __netlink_dump_start+0x84/0x2b0 #1: ffff9c7401d72cd0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sctp_sock_dump+0x38/0x200 stack backtrace: CPU: 0 UID: 0 PID: 215 Comm: ss Not tainted 6.18.0-rc1-00093-g7f864458e9a6 #5 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x5d/0x90 lockdep_rcu_suspicious.cold+0x4e/0xa3 inet_sctp_diag_fill.isra.0+0x4b1/0x5d0 sctp_sock_dump+0x131/0x200 sctp_transport_traverse_process+0x170/0x1b0 ? __pfx_sctp_sock_filter+0x10/0x10 ? __pfx_sctp_sock_dump+0x10/0x10 sctp_diag_dump+0x103/0x140 __inet_diag_dump+0x70/0xb0 netlink_dump+0x148/0x490 __netlink_dump_start+0x1f3/0x2b0 inet_diag_handler_cmd+0xcd/0x100 ? __pfx_inet_diag_dump_start+0x10/0x10 ? __pfx_inet_diag_dump+0x10/0x10 ? __pfx_inet_diag_dump_done+0x10/0x10 sock_diag_rcv_msg+0x18e/0x320 ? __pfx_sock_diag_rcv_msg+0x10/0x10 netlink_rcv_skb+0x4d/0x100 netlink_unicast+0x1d7/0x2b0 netlink_sendmsg+0x203/0x450 ____sys_sendmsg+0x30c/0x340 ___sys_sendmsg+0x94/0xf0 __sys_sendmsg+0x83/0xf0 do_syscall_64+0xbb/0x390 entry_SYSCALL_64_after_hwframe+0x77/0x7f ... </TASK> Fixes: 8f840e4 ("sctp: add the sctp_diag.c file") Signed-off-by: Stefan Wiehler <stefan.wiehler@nokia.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Acked-by: Xin Long <lucien.xin@gmail.com> Link: https://patch.msgid.link/20251028161506.3294376-2-stefan.wiehler@nokia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Michael Chan says: ==================== bnxt_en: Bug fixes Patches 1, 3, and 4 are bug fixes related to the FW log tracing driver coredump feature recently added in 6.13. Patch #1 adds the necessary call to shutdown the FW logging DMA during PCI shutdown. Patch #3 fixes a possible null pointer derefernce when using early versions of the FW with this feature. Patch #4 adds the coredump header information unconditionally to make it more robust. Patch #2 fixes a possible memory leak during PTP shutdown. Patch #5 eliminates a dmesg warning when doing devlink reload. ==================== Link: https://patch.msgid.link/20251104005700.542174-1-michael.chan@broadcom.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>

On completion of i915_vma_pin_ww(), a synchronous variant of dma_fence_work_commit() is called. When pinning a VMA to GGTT address space on a Cherry View family processor, or on a Broxton generation SoC with VTD enabled, i.e., when stop_machine() is then called from intel_ggtt_bind_vma(), that can potentially lead to lock inversion among reservation_ww and cpu_hotplug locks. [86.861179] ====================================================== [86.861193] WARNING: possible circular locking dependency detected [86.861209] 6.15.0-rc5-CI_DRM_16515-gca0305cadc2d+ #1 Tainted: G U [86.861226] ------------------------------------------------------ [86.861238] i915_module_loa/1432 is trying to acquire lock: [86.861252] ffffffff83489090 (cpu_hotplug_lock){++++}-{0:0}, at: stop_machine+0x1c/0x50 [86.861290] but task is already holding lock: [86.861303] ffffc90002e0b4c8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915] [86.862233] which lock already depends on the new lock. [86.862251] the existing dependency chain (in reverse order) is: [86.862265] -> #5 (reservation_ww_class_mutex){+.+.}-{3:3}: [86.862292] dma_resv_lockdep+0x19a/0x390 [86.862315] do_one_initcall+0x60/0x3f0 [86.862334] kernel_init_freeable+0x3cd/0x680 [86.862353] kernel_init+0x1b/0x200 [86.862369] ret_from_fork+0x47/0x70 [86.862383] ret_from_fork_asm+0x1a/0x30 [86.862399] -> #4 (reservation_ww_class_acquire){+.+.}-{0:0}: [86.862425] dma_resv_lockdep+0x178/0x390 [86.862440] do_one_initcall+0x60/0x3f0 [86.862454] kernel_init_freeable+0x3cd/0x680 [86.862470] kernel_init+0x1b/0x200 [86.862482] ret_from_fork+0x47/0x70 [86.862495] ret_from_fork_asm+0x1a/0x30 [86.862509] -> #3 (&mm->mmap_lock){++++}-{3:3}: [86.862531] down_read_killable+0x46/0x1e0 [86.862546] lock_mm_and_find_vma+0xa2/0x280 [86.862561] do_user_addr_fault+0x266/0x8e0 [86.862578] exc_page_fault+0x8a/0x2f0 [86.862593] asm_exc_page_fault+0x27/0x30 [86.862607] filldir64+0xeb/0x180 [86.862620] kernfs_fop_readdir+0x118/0x480 [86.862635] iterate_dir+0xcf/0x2b0 [86.862648] __x64_sys_getdents64+0x84/0x140 [86.862661] x64_sys_call+0x1058/0x2660 [86.862675] do_syscall_64+0x91/0xe90 [86.862689] entry_SYSCALL_64_after_hwframe+0x76/0x7e [86.862703] -> #2 (&root->kernfs_rwsem){++++}-{3:3}: [86.862725] down_write+0x3e/0xf0 [86.862738] kernfs_add_one+0x30/0x3c0 [86.862751] kernfs_create_dir_ns+0x53/0xb0 [86.862765] internal_create_group+0x134/0x4c0 [86.862779] sysfs_create_group+0x13/0x20 [86.862792] topology_add_dev+0x1d/0x30 [86.862806] cpuhp_invoke_callback+0x4b5/0x850 [86.862822] cpuhp_issue_call+0xbf/0x1f0 [86.862836] __cpuhp_setup_state_cpuslocked+0x111/0x320 [86.862852] __cpuhp_setup_state+0xb0/0x220 [86.862866] topology_sysfs_init+0x30/0x50 [86.862879] do_one_initcall+0x60/0x3f0 [86.862893] kernel_init_freeable+0x3cd/0x680 [86.862908] kernel_init+0x1b/0x200 [86.862921] ret_from_fork+0x47/0x70 [86.862934] ret_from_fork_asm+0x1a/0x30 [86.862947] -> #1 (cpuhp_state_mutex){+.+.}-{3:3}: [86.862969] __mutex_lock+0xaa/0xed0 [86.862982] mutex_lock_nested+0x1b/0x30 [86.862995] __cpuhp_setup_state_cpuslocked+0x67/0x320 [86.863012] __cpuhp_setup_state+0xb0/0x220 [86.863026] page_alloc_init_cpuhp+0x2d/0x60 [86.863041] mm_core_init+0x22/0x2d0 [86.863054] start_kernel+0x576/0xbd0 [86.863068] x86_64_start_reservations+0x18/0x30 [86.863084] x86_64_start_kernel+0xbf/0x110 [86.863098] common_startup_64+0x13e/0x141 [86.863114] -> #0 (cpu_hotplug_lock){++++}-{0:0}: [86.863135] __lock_acquire+0x1635/0x2810 [86.863152] lock_acquire+0xc4/0x2f0 [86.863166] cpus_read_lock+0x41/0x100 [86.863180] stop_machine+0x1c/0x50 [86.863194] bxt_vtd_ggtt_insert_entries__BKL+0x3b/0x60 [i915] [86.863987] intel_ggtt_bind_vma+0x43/0x70 [i915] [86.864735] __vma_bind+0x55/0x70 [i915] [86.865510] fence_work+0x26/0xa0 [i915] [86.866248] fence_notify+0xa1/0x140 [i915] [86.866983] __i915_sw_fence_complete+0x8f/0x270 [i915] [86.867719] i915_sw_fence_commit+0x39/0x60 [i915] [86.868453] i915_vma_pin_ww+0x462/0x1360 [i915] [86.869228] i915_vma_pin.constprop.0+0x133/0x1d0 [i915] [86.870001] initial_plane_vma+0x307/0x840 [i915] [86.870774] intel_initial_plane_config+0x33f/0x670 [i915] [86.871546] intel_display_driver_probe_nogem+0x1c6/0x260 [i915] [86.872330] i915_driver_probe+0x7fa/0xe80 [i915] [86.873057] i915_pci_probe+0xe6/0x220 [i915] [86.873782] local_pci_probe+0x47/0xb0 [86.873802] pci_device_probe+0xf3/0x260 [86.873817] really_probe+0xf1/0x3c0 [86.873833] __driver_probe_device+0x8c/0x180 [86.873848] driver_probe_device+0x24/0xd0 [86.873862] __driver_attach+0x10f/0x220 [86.873876] bus_for_each_dev+0x7f/0xe0 [86.873892] driver_attach+0x1e/0x30 [86.873904] bus_add_driver+0x151/0x290 [86.873917] driver_register+0x5e/0x130 [86.873931] __pci_register_driver+0x7d/0x90 [86.873945] i915_pci_register_driver+0x23/0x30 [i915] [86.874678] i915_init+0x37/0x120 [i915] [86.875347] do_one_initcall+0x60/0x3f0 [86.875369] do_init_module+0x97/0x2a0 [86.875385] load_module+0x2c54/0x2d80 [86.875398] init_module_from_file+0x96/0xe0 [86.875413] idempotent_init_module+0x117/0x330 [86.875426] __x64_sys_finit_module+0x77/0x100 [86.875440] x64_sys_call+0x24de/0x2660 [86.875454] do_syscall_64+0x91/0xe90 [86.875470] entry_SYSCALL_64_after_hwframe+0x76/0x7e [86.875486] other info that might help us debug this: [86.875502] Chain exists of: cpu_hotplug_lock --> reservation_ww_class_acquire --> reservation_ww_class_mutex [86.875539] Possible unsafe locking scenario: [86.875552] CPU0 CPU1 [86.875563] ---- ---- [86.875573] lock(reservation_ww_class_mutex); [86.875588] lock(reservation_ww_class_acquire); [86.875606] lock(reservation_ww_class_mutex); [86.875624] rlock(cpu_hotplug_lock); [86.875637] *** DEADLOCK *** [86.875650] 3 locks held by i915_module_loa/1432: [86.875663] #0: ffff888101f5c1b0 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x104/0x220 [86.875699] #1: ffffc90002e0b4a0 (reservation_ww_class_acquire){+.+.}-{0:0}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915] [86.876512] #2: ffffc90002e0b4c8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915] [86.877305] stack backtrace: [86.877326] CPU: 0 UID: 0 PID: 1432 Comm: i915_module_loa Tainted: G U 6.15.0-rc5-CI_DRM_16515-gca0305cadc2d+ #1 PREEMPT(voluntary) [86.877334] Tainted: [U]=USER [86.877336] Hardware name: /NUC5CPYB, BIOS PYBSWCEL.86A.0079.2020.0420.1316 04/20/2020 [86.877339] Call Trace: [86.877344] <TASK> [86.877353] dump_stack_lvl+0x91/0xf0 [86.877364] dump_stack+0x10/0x20 [86.877369] print_circular_bug+0x285/0x360 [86.877379] check_noncircular+0x135/0x150 [86.877390] __lock_acquire+0x1635/0x2810 [86.877403] lock_acquire+0xc4/0x2f0 [86.877408] ? stop_machine+0x1c/0x50 [86.877422] ? __pfx_bxt_vtd_ggtt_insert_entries__cb+0x10/0x10 [i915] [86.878173] cpus_read_lock+0x41/0x100 [86.878182] ? stop_machine+0x1c/0x50 [86.878191] ? __pfx_bxt_vtd_ggtt_insert_entries__cb+0x10/0x10 [i915] [86.878916] stop_machine+0x1c/0x50 [86.878927] bxt_vtd_ggtt_insert_entries__BKL+0x3b/0x60 [i915] [86.879652] intel_ggtt_bind_vma+0x43/0x70 [i915] [86.880375] __vma_bind+0x55/0x70 [i915] [86.881133] fence_work+0x26/0xa0 [i915] [86.881851] fence_notify+0xa1/0x140 [i915] [86.882566] __i915_sw_fence_complete+0x8f/0x270 [i915] [86.883286] i915_sw_fence_commit+0x39/0x60 [i915] [86.884003] i915_vma_pin_ww+0x462/0x1360 [i915] [86.884756] ? i915_vma_pin.constprop.0+0x6c/0x1d0 [i915] [86.885513] i915_vma_pin.constprop.0+0x133/0x1d0 [i915] [86.886281] initial_plane_vma+0x307/0x840 [i915] [86.887049] intel_initial_plane_config+0x33f/0x670 [i915] [86.887819] intel_display_driver_probe_nogem+0x1c6/0x260 [i915] [86.888587] i915_driver_probe+0x7fa/0xe80 [i915] [86.889293] ? mutex_unlock+0x12/0x20 [86.889301] ? drm_privacy_screen_get+0x171/0x190 [86.889308] ? acpi_dev_found+0x66/0x80 [86.889321] i915_pci_probe+0xe6/0x220 [i915] [86.890038] local_pci_probe+0x47/0xb0 [86.890049] pci_device_probe+0xf3/0x260 [86.890058] really_probe+0xf1/0x3c0 [86.890067] __driver_probe_device+0x8c/0x180 [86.890072] driver_probe_device+0x24/0xd0 [86.890078] __driver_attach+0x10f/0x220 [86.890083] ? __pfx___driver_attach+0x10/0x10 [86.890088] bus_for_each_dev+0x7f/0xe0 [86.890097] driver_attach+0x1e/0x30 [86.890101] bus_add_driver+0x151/0x290 [86.890107] driver_register+0x5e/0x130 [86.890113] __pci_register_driver+0x7d/0x90 [86.890119] i915_pci_register_driver+0x23/0x30 [i915] [86.890833] i915_init+0x37/0x120 [i915] [86.891482] ? __pfx_i915_init+0x10/0x10 [i915] [86.892135] do_one_initcall+0x60/0x3f0 [86.892145] ? __kmalloc_cache_noprof+0x33f/0x470 [86.892157] do_init_module+0x97/0x2a0 [86.892164] load_module+0x2c54/0x2d80 [86.892168] ? __kernel_read+0x15c/0x300 [86.892185] ? kernel_read_file+0x2b1/0x320 [86.892195] init_module_from_file+0x96/0xe0 [86.892199] ? init_module_from_file+0x96/0xe0 [86.892211] idempotent_init_module+0x117/0x330 [86.892224] __x64_sys_finit_module+0x77/0x100 [86.892230] x64_sys_call+0x24de/0x2660 [86.892236] do_syscall_64+0x91/0xe90 [86.892243] ? irqentry_exit+0x77/0xb0 [86.892249] ? sysvec_apic_timer_interrupt+0x57/0xc0 [86.892256] entry_SYSCALL_64_after_hwframe+0x76/0x7e [86.892261] RIP: 0033:0x7303e1b2725d [86.892271] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8b bb 0d 00 f7 d8 64 89 01 48 [86.892276] RSP: 002b:00007ffddd1fdb38 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [86.892281] RAX: ffffffffffffffda RBX: 00005d771d88fd90 RCX: 00007303e1b2725d [86.892285] RDX: 0000000000000000 RSI: 00005d771d893aa0 RDI: 000000000000000c [86.892287] RBP: 00007ffddd1fdbf0 R08: 0000000000000040 R09: 00007ffddd1fdb80 [86.892289] R10: 00007303e1c03b20 R11: 0000000000000246 R12: 00005d771d893aa0 [86.892292] R13: 0000000000000000 R14: 00005d771d88f0d0 R15: 00005d771d895710 [86.892304] </TASK> Call asynchronous variant of dma_fence_work_commit() in that case. v3: Provide more verbose in-line comment (Andi), - mention target environments in commit message. Fixes: 7d1c261 ("drm/i915: Take reservation lock around i915_vma_pin.") Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14985 Cc: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com> Reviewed-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com> Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com> Acked-by: Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com> Link: https://lore.kernel.org/r/20251023082925.351307-6-janusz.krzysztofik@linux.intel.com (cherry picked from commit 648ef13) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

The one_time_gc field in struct victim_sel_policy is conditionally initialized but unconditionally read, leading to undefined behavior that triggers UBSAN warnings. In f2fs_get_victim() at fs/f2fs/gc.c:774, the victim_sel_policy structure is declared without initialization: struct victim_sel_policy p; The field p.one_time_gc is only assigned when the 'one_time' parameter is true (line 789): if (one_time) { p.one_time_gc = one_time; ... } However, this field is unconditionally read in subsequent get_gc_cost() at line 395: if (p->one_time_gc && (valid_thresh_ratio < 100) && ...) When one_time is false, p.one_time_gc contains uninitialized stack memory. Hence p.one_time_gc is an invalid bool value. UBSAN detects this invalid bool value: UBSAN: invalid-load in fs/f2fs/gc.c:395:7 load of value 77 is not a valid value for type '_Bool' CPU: 3 UID: 0 PID: 1297 Comm: f2fs_gc-252:16 Not tainted 6.18.0-rc3 #5 PREEMPT(voluntary) Hardware name: OpenStack Foundation OpenStack Nova, BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x70/0x90 dump_stack+0x14/0x20 __ubsan_handle_load_invalid_value+0xb3/0xf0 ? dl_server_update+0x2e/0x40 ? update_curr+0x147/0x170 f2fs_get_victim.cold+0x66/0x134 [f2fs] ? sched_balance_newidle+0x2ca/0x470 ? finish_task_switch.isra.0+0x8d/0x2a0 f2fs_gc+0x2ba/0x8e0 [f2fs] ? _raw_spin_unlock_irqrestore+0x12/0x40 ? __timer_delete_sync+0x80/0xe0 ? timer_delete_sync+0x14/0x20 ? schedule_timeout+0x82/0x100 gc_thread_func+0x38b/0x860 [f2fs] ? gc_thread_func+0x38b/0x860 [f2fs] ? __pfx_autoremove_wake_function+0x10/0x10 kthread+0x10b/0x220 ? __pfx_gc_thread_func+0x10/0x10 [f2fs] ? _raw_spin_unlock_irq+0x12/0x40 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x11a/0x160 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> This issue is reliably reproducible with the following steps on a 100GB SSD /dev/vdb: mkfs.f2fs -f /dev/vdb mount /dev/vdb /mnt/f2fs_test fio --name=gc --directory=/mnt/f2fs_test --rw=randwrite \ --bs=4k --size=8G --numjobs=12 --fsync=4 --runtime=10 \ --time_based echo 1 > /sys/fs/f2fs/vdb/gc_urgent The uninitialized value causes incorrect GC victim selection, leading to unpredictable garbage collection behavior. Fix by zero-initializing the entire victim_sel_policy structure to ensure all fields have defined values. Fixes: e791d00 ("f2fs: add valid block ratio not to do excessive GC for one time GC") Cc: stable@kernel.org Signed-off-by: Xiaole He <hexiaole1994@126.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

When interrupting perf stat in repeat mode with a signal the signal is passed to the child process but the repeat doesn't terminate: ``` $ perf stat -v --null --repeat 10 sleep 1 Control descriptor is not initialized [ perf stat: executing run #1 ... ] [ perf stat: executing run #2 ... ] ^Csleep: Interrupt [ perf stat: executing run #3 ... ] [ perf stat: executing run #4 ... ] [ perf stat: executing run #5 ... ] [ perf stat: executing run #6 ... ] [ perf stat: executing run #7 ... ] [ perf stat: executing run #8 ... ] [ perf stat: executing run #9 ... ] [ perf stat: executing run #10 ... ] Performance counter stats for 'sleep 1' (10 runs): 0.9500 +- 0.0512 seconds time elapsed ( +- 5.39% ) 0.01user 0.02system 0:09.53elapsed 0%CPU (0avgtext+0avgdata 18940maxresident)k 29944inputs+0outputs (0major+2629minor)pagefaults 0swaps ``` Terminate the repeated run and give a reasonable exit value: ``` $ perf stat -v --null --repeat 10 sleep 1 Control descriptor is not initialized [ perf stat: executing run #1 ... ] [ perf stat: executing run #2 ... ] [ perf stat: executing run #3 ... ] ^Csleep: Interrupt Performance counter stats for 'sleep 1' (10 runs): 0.680 +- 0.321 seconds time elapsed ( +- 47.16% ) Command exited with non-zero status 130 0.00user 0.01system 0:02.05elapsed 0%CPU (0avgtext+0avgdata 70688maxresident)k 0inputs+0outputs (0major+5002minor)pagefaults 0swaps ``` Note, this also changes the exit value for non-repeat runs when interrupted by a signal. Reported-by: Ingo Molnar <mingo@kernel.org> Closes: https://lore.kernel.org/lkml/aS5wjmbAM9ka3M2g@gmail.com/ Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Fix a loop scenario of ethx:egress->ethx:egress Example setup to reproduce: tc qdisc add dev ethx root handle 1: drr tc filter add dev ethx parent 1: protocol ip prio 1 matchall \ action mirred egress redirect dev ethx Now ping out of ethx and you get a deadlock: [ 116.892898][ T307] ============================================ [ 116.893182][ T307] WARNING: possible recursive locking detected [ 116.893418][ T307] 6.18.0-rc6-01205-ge05021a829b8-dirty #204 Not tainted [ 116.893682][ T307] -------------------------------------------- [ 116.893926][ T307] ping/307 is trying to acquire lock: [ 116.894133][ T307] ffff88800c122908 (&sch->root_lock_key){+...}-{3:3}, at: __dev_queue_xmit+0x2210/0x3b50 [ 116.894517][ T307] [ 116.894517][ T307] but task is already holding lock: [ 116.894836][ T307] ffff88800c122908 (&sch->root_lock_key){+...}-{3:3}, at: __dev_queue_xmit+0x2210/0x3b50 [ 116.895252][ T307] [ 116.895252][ T307] other info that might help us debug this: [ 116.895608][ T307] Possible unsafe locking scenario: [ 116.895608][ T307] [ 116.895901][ T307] CPU0 [ 116.896057][ T307] ---- [ 116.896200][ T307] lock(&sch->root_lock_key); [ 116.896392][ T307] lock(&sch->root_lock_key); [ 116.896605][ T307] [ 116.896605][ T307] *** DEADLOCK *** [ 116.896605][ T307] [ 116.896864][ T307] May be due to missing lock nesting notation [ 116.896864][ T307] [ 116.897123][ T307] 6 locks held by ping/307: [ 116.897302][ T307] #0: ffff88800b4b0250 (sk_lock-AF_INET){+.+.}-{0:0}, at: raw_sendmsg+0xb20/0x2cf0 [ 116.897808][ T307] #1: ffffffff88c839c0 (rcu_read_lock){....}-{1:3}, at: ip_output+0xa9/0x600 [ 116.898138][ T307] #2: ffffffff88c839c0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x2c6/0x1ee0 [ 116.898459][ T307] #3: ffffffff88c83960 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x200/0x3b50 [ 116.898782][ T307] #4: ffff88800c122908 (&sch->root_lock_key){+...}-{3:3}, at: __dev_queue_xmit+0x2210/0x3b50 [ 116.899132][ T307] #5: ffffffff88c83960 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x200/0x3b50 [ 116.899442][ T307] [ 116.899442][ T307] stack backtrace: [ 116.899667][ T307] CPU: 2 UID: 0 PID: 307 Comm: ping Not tainted 6.18.0-rc6-01205-ge05021a829b8-dirty #204 PREEMPT(voluntary) [ 116.899672][ T307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 116.899675][ T307] Call Trace: [ 116.899678][ T307] <TASK> [ 116.899680][ T307] dump_stack_lvl+0x6f/0xb0 [ 116.899688][ T307] print_deadlock_bug.cold+0xc0/0xdc [ 116.899695][ T307] __lock_acquire+0x11f7/0x1be0 [ 116.899704][ T307] lock_acquire+0x162/0x300 [ 116.899707][ T307] ? __dev_queue_xmit+0x2210/0x3b50 [ 116.899713][ T307] ? srso_alias_return_thunk+0x5/0xfbef5 [ 116.899717][ T307] ? stack_trace_save+0x93/0xd0 [ 116.899723][ T307] _raw_spin_lock+0x30/0x40 [ 116.899728][ T307] ? __dev_queue_xmit+0x2210/0x3b50 [ 116.899731][ T307] __dev_queue_xmit+0x2210/0x3b50 Fixes: 178ca30 ("Revert "net/sched: Fix mirred deadlock on device recursion"") Tested-by: Victor Nogueira <victor@mojatatu.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Link: https://patch.msgid.link/20251210162255.1057663-1-jhs@mojatatu.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>

quic-viskuma changed the base branch from qcom-next-staging to main May 20, 2025 08:59

quic-viskuma force-pushed the qcom-next-stg branch 3 times, most recently from ac2725b to 6866803 Compare May 20, 2025 09:37

quic-viskuma changed the base branch from main to qcom-next-staging May 20, 2025 09:58

quic-viskuma changed the base branch from qcom-next-staging to main May 21, 2025 07:14

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quic-viskuma changed the base branch from main to qcom-next-staging May 21, 2025 16:55

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quic-viskuma force-pushed the qcom-next-stg branch 4 times, most recently from fbc8c74 to d15d946 Compare May 22, 2025 16:23

ci: Add kernel checkers

48edd6b

Integrate kernel specific checkers - check-uapi-headers, sparse-check, checkpatch, dt-binding-check and dtb-check https://github.com/qualcomm-linux/kernel-checkers Signed-off-by: VISHAL KUMAR <viskuma@qti.qualcomm.com>

quic-viskuma force-pushed the qcom-next-stg branch 2 times, most recently from dd38567 to e698e95 Compare May 22, 2025 17:45

anshulg-qti approved these changes May 22, 2025

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quic-viskuma force-pushed the qcom-next-stg branch 2 times, most recently from 1b31589 to bb2b4bb Compare May 23, 2025 03:51

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quic-viskuma force-pushed the qcom-next-stg branch from bb2b4bb to 5bfef5c Compare May 23, 2025 04:39

quic-nasserg approved these changes May 23, 2025

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Fix: Kernel checker workflow as an action

1246e6b

Add reusable kernel checker workflows as action Signed-off-by: Vishal Kumar <viskuma@qti.qualcomm.com>

quic-viskuma force-pushed the qcom-next-stg branch from 5bfef5c to 1246e6b Compare May 23, 2025 05:05

njjetha merged commit 202f487 into qualcomm-linux:qcom-next-staging May 23, 2025
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ci: Add kernel checkers #5

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quic-viskuma commented May 19, 2025

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anshulg-qti commented May 23, 2025

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