============================= [ BUG: Invalid wait context ] 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0 Not tainted ----------------------------- syz.3.1173/10582 is trying to lock: ffff8880233b5358 (&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.3.1173/10582: #0: ffff88806965c0a8 (&ctx->uring_lock){+.+.}-{4:4}, at: __do_sys_io_uring_enter+0xd38/0x1620 io_uring/io_uring.c:3389 #1: ffff88801e917928 (&acct->lock){+.+.}-{2:2}, at: io_wq_enqueue+0x20a/0xb30 io_uring/io-wq.c:953 #2: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2361 [inline] #2: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1c2/0x590 kernel/trace/bpf_trace.c:2403 #3: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #3: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: __lock_task_sighand+0x3f/0x340 kernel/signal.c:1362 stack backtrace: CPU: 2 UID: 0 PID: 10582 Comm: syz.3.1173 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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+0x415/0x520 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_5052ae1cb1c4fef3+0x1e/0x20 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:692 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2362 [inline] bpf_trace_run2+0x34c/0x590 kernel/trace/bpf_trace.c:2403 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_wq_enqueue+0x20a/0xb30 io_uring/io-wq.c:953 io_queue_iowq+0x232/0x4a0 io_uring/io_uring.c:533 io_queue_async+0x1e7/0x420 io_uring/io_uring.c:1931 io_queue_sqe io_uring/io_uring.c:1953 [inline] io_submit_sqe io_uring/io_uring.c:2201 [inline] io_submit_sqes+0x177a/0x25f0 io_uring/io_uring.c:2318 __do_sys_io_uring_enter+0xd43/0x1620 io_uring/io_uring.c:3390 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f25579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f507655c EFLAGS: 00000296 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000003516 RDX: 000000000000003f RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi