============================= [ BUG: Invalid wait context ] 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0 Not tainted ----------------------------- syz.0.3861/19453 is trying to lock: ffff88802c459bd8 (&sighand->siglock){-.-.}-{3:3}, at: __lock_task_sighand+0xc2/0x340 kernel/signal.c:1379 other info that might help us debug this: context-{5:5} 4 locks held by syz.0.3861/19453: #0: ffff88805e78a0a8 (&ctx->uring_lock){+.+.}-{4:4}, at: __do_sys_io_uring_register io_uring/register.c:906 [inline] #0: ffff88805e78a0a8 (&ctx->uring_lock){+.+.}-{4:4}, at: __se_sys_io_uring_register io_uring/register.c:884 [inline] #0: ffff88805e78a0a8 (&ctx->uring_lock){+.+.}-{4:4}, at: __x64_sys_io_uring_register+0x168/0x2b0 io_uring/register.c:884 #1: ffff88804e6cb928 (&acct->lock){+.+.}-{2:2}, at: io_acct_cancel_pending_work+0x2d/0x690 io_uring/io-wq.c:1049 #2: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2350 [inline] #2: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1c2/0x590 kernel/trace/bpf_trace.c:2392 #3: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #3: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: __lock_task_sighand+0x3f/0x340 kernel/signal.c:1362 stack backtrace: CPU: 0 UID: 0 PID: 19453 Comm: syz.0.3861 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x878/0x3c40 kernel/locking/lockdep.c:5176 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 __lock_task_sighand+0xc2/0x340 kernel/signal.c:1379 lock_task_sighand include/linux/sched/signal.h:743 [inline] do_send_sig_info kernel/signal.c:1267 [inline] group_send_sig_info+0x290/0x300 kernel/signal.c:1418 bpf_send_signal_common+0x3d3/0x530 kernel/trace/bpf_trace.c:881 ____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline] bpf_send_signal+0x1d/0x30 kernel/trace/bpf_trace.c:884 bpf_prog_631417f49dd64198+0x25/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2351 [inline] bpf_trace_run2+0x231/0x590 kernel/trace/bpf_trace.c:2392 __bpf_trace_contention_end+0xca/0x110 include/trace/events/lock.h:122 trace_contention_end.constprop.0+0xf0/0x170 include/trace/events/lock.h:122 __pv_queued_spin_lock_slowpath+0x27e/0xc90 kernel/locking/qspinlock.c:557 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x210/0x2c0 kernel/locking/spinlock_debug.c:116 io_acct_cancel_pending_work+0x2d/0x690 io_uring/io-wq.c:1049 io_wq_cancel_pending_work io_uring/io-wq.c:1074 [inline] io_wq_cancel_cb+0xda/0x390 io_uring/io-wq.c:1112 io_async_cancel_one+0xa0/0x100 io_uring/cancel.c:87 io_try_cancel+0xf2/0x280 io_uring/cancel.c:111 __io_async_cancel+0xac/0x420 io_uring/cancel.c:175 __io_sync_cancel+0x1a4/0x220 io_uring/cancel.c:253 io_sync_cancel+0x5d5/0x6c0 io_uring/cancel.c:293 __io_uring_register+0x3a6/0x2290 io_uring/register.c:768 __do_sys_io_uring_register io_uring/register.c:907 [inline] __se_sys_io_uring_register io_uring/register.c:884 [inline] __x64_sys_io_uring_register+0x17a/0x2b0 io_uring/register.c:884 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f866597ff19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f86666f3058 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007f8665b45fa0 RCX: 00007f866597ff19 RDX: 0000000020000100 RSI: 0000000000000018 RDI: 0000000000000009 RBP: 00007f86659f3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8665b45fa0 R15: 00007ffe6afb3558