------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 31381 at kernel/locking/lockdep.c:234 hlock_class kernel/locking/lockdep.c:234 [inline] WARNING: CPU: 1 PID: 31381 at kernel/locking/lockdep.c:234 check_wait_context kernel/locking/lockdep.c:4852 [inline] WARNING: CPU: 1 PID: 31381 at kernel/locking/lockdep.c:234 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Modules linked in: CPU: 1 UID: 0 PID: 31381 Comm: syz.9.7095 Not tainted 6.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4852 [inline] RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Code: 00 00 83 3d 61 52 a0 0e 00 75 23 90 48 c7 c7 20 b2 2a 8c 48 c7 c6 20 b5 2a 8c e8 f7 bc e4 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc9000352ef90 EFLAGS: 00010046 RAX: 70af2d6d0f6fdf00 RBX: 0000000000001b20 RCX: 0000000000080000 RDX: dffffc0000000000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 00000000000c1b20 R08: ffffffff81819e52 R09: fffffbfff1d3a69c R10: dffffc0000000000 R11: fffffbfff1d3a69c R12: ffff88802d98c6d4 R13: 0000000000000005 R14: 1ffff11005b318e7 R15: ffff88802d98c738 FS: 00007f510d3af6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000ffe000 CR3: 0000000040d84000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606 raw_spin_rq_lock kernel/sched/sched.h:1521 [inline] rq_lock kernel/sched/sched.h:1852 [inline] __schedule+0x357/0x4c90 kernel/sched/core.c:6688 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7087 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d 94 53 93 0c 48 89 de 5b e9 53 e1 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 80 d6 03 00 65 8b 15 a0 f6 RSP: 0018:ffffc9000352f5b0 EFLAGS: 00000246 RAX: ffffffff818b6822 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9002375b000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc9000352f710 R08: ffffffff8a9c26ba R09: 1ffff11012b849c1 R10: dffffc0000000000 R11: ffffed1012b849c2 R12: dffffc0000000000 R13: 1ffff11012b849c1 R14: ffff888095c24e08 R15: ffffc9000352f7c0 put_pid+0xc8/0x120 kernel/pid.c:112 scm_destroy_cred include/net/scm.h:80 [inline] scm_destroy include/net/scm.h:86 [inline] __scm_recv_common include/net/scm.h:180 [inline] scm_recv_unix+0x6ad/0x9e0 include/net/scm.h:214 __unix_dgram_recvmsg+0xce8/0x1320 net/unix/af_unix.c:2512 sock_recvmsg_nosec+0x190/0x1d0 net/socket.c:1023 ____sys_recvmsg+0x3cd/0x480 net/socket.c:2791 ___sys_recvmsg net/socket.c:2835 [inline] do_recvmmsg+0x426/0xab0 net/socket.c:2930 __sys_recvmmsg net/socket.c:3004 [inline] __do_sys_recvmmsg net/socket.c:3027 [inline] __se_sys_recvmmsg net/socket.c:3020 [inline] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3020 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f510c58d169 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:00007f510d3af038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f510c7a6080 RCX: 00007f510c58d169 RDX: 0000000000010106 RSI: 00004000000000c0 RDI: 0000000000000003 RBP: 00007f510c60e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f510c7a6080 R15: 00007ffef7f48028 ---------------- Code disassembly (best guess): 0: 89 fb mov %edi,%ebx 2: e8 23 00 00 00 call 0x2a 7: 48 8b 3d 94 53 93 0c mov 0xc935394(%rip),%rdi # 0xc9353a2 e: 48 89 de mov %rbx,%rsi 11: 5b pop %rbx 12: e9 53 e1 5b 00 jmp 0x5be16a 17: 0f 1f 00 nopl (%rax) 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 8b 04 24 mov (%rsp),%rax 32: 65 48 8b 0c 25 80 d6 mov %gs:0x3d680,%rcx 39: 03 00 3b: 65 gs 3c: 8b .byte 0x8b 3d: 15 .byte 0x15 3e: a0 .byte 0xa0 3f: f6 .byte 0xf6