=============================
[ BUG: Invalid wait context ]
6.14.0-rc4-syzkaller #0 Not tainted
-----------------------------
syz.2.170/6789 is trying to lock:
ffff8880b873e958 (&fc->killsb){+.+.}-{4:4}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
other info that might help us debug this:
context-{5:5}
3 locks held by syz.2.170/6789:
#0: ffff888035ab8e10 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x24f/0x1320 net/unix/af_unix.c:2426
#1: ffff888035ab8f58 (&u->peer_wait){+.+.}-{3:3}, at: __wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
#2: ffff8880263da828 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
#2: ffff8880263da828 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xc2/0x1470 kernel/sched/core.c:4214
stack backtrace:
CPU: 0 UID: 0 PID: 6789 Comm: syz.2.170 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4828 [inline]
check_wait_context kernel/locking/lockdep.c:4900 [inline]
__lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5178
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+0x2a/0x140 kernel/sched/core.c:598
raw_spin_rq_lock kernel/sched/sched.h:1521 [inline]
rq_lock kernel/sched/sched.h:1852 [inline]
ttwu_queue kernel/sched/core.c:4000 [inline]
try_to_wake_up+0x7e2/0x1470 kernel/sched/core.c:4330
autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x132/0x1e0 kernel/sched/wait.c:106
__unix_dgram_recvmsg+0x61a/0x1320 net/unix/af_unix.c:2456
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: 0033:0x7f557498d169
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:00007f5575808038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f5574ba6080 RCX: 00007f557498d169
RDX: 0000000000010106 RSI: 00004000000000c0 RDI: 0000000000000003
RBP: 00007f5574a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5574ba6080 R15: 00007ffe2f8a13b8
BUG: unable to handle page fault for address: fffffbfff3598930
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 13fff1067 PTE 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 6789 Comm: syz.2.170 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189
Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00
RSP: 0018:ffffc90003fc7260 EFLAGS: 00010086
RAX: 0000000000cef601 RBX: 1ffffffff3598930 RCX: ffffffff819cc3b4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9acc4980
RBP: ffffffffffffffff R08: ffffffff9acc4987 R09: 1ffffffff3598930
R10: dffffc0000000000 R11: fffffbfff3598930 R12: ffff8880263de4d4
R13: ffff8880263dda00 R14: dffffc0000000001 R15: fffffbfff3598931
FS: 00007f55758086c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff3598930 CR3: 0000000031990000 CR4: 0000000000350ef0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
__lock_acquire+0xc94/0x2100 kernel/locking/lockdep.c:5198
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+0x2a/0x140 kernel/sched/core.c:598
raw_spin_rq_lock kernel/sched/sched.h:1521 [inline]
rq_lock kernel/sched/sched.h:1852 [inline]
ttwu_queue kernel/sched/core.c:4000 [inline]
try_to_wake_up+0x7e2/0x1470 kernel/sched/core.c:4330
autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x132/0x1e0 kernel/sched/wait.c:106
__unix_dgram_recvmsg+0x61a/0x1320 net/unix/af_unix.c:2456
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: 0033:0x7f557498d169
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:00007f5575808038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f5574ba6080 RCX: 00007f557498d169
RDX: 0000000000010106 RSI: 00004000000000c0 RDI: 0000000000000003
RBP: 00007f5574a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5574ba6080 R15: 00007ffe2f8a13b8
Modules linked in:
CR2: fffffbfff3598930
---[ end trace 0000000000000000 ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189
Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00
RSP: 0018:ffffc90003fc7260 EFLAGS: 00010086
RAX: 0000000000cef601 RBX: 1ffffffff3598930 RCX: ffffffff819cc3b4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9acc4980
RBP: ffffffffffffffff R08: ffffffff9acc4987 R09: 1ffffffff3598930
R10: dffffc0000000000 R11: fffffbfff3598930 R12: ffff8880263de4d4
R13: ffff8880263dda00 R14: dffffc0000000001 R15: fffffbfff3598931
FS: 00007f55758086c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff3598930 CR3: 0000000031990000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 7 bytes skipped:
0: df 4f 8d fisttps -0x73(%rdi)
3: 3c 31 cmp $0x31,%al
5: 4c 89 fd mov %r15,%rbp
8: 4c 29 dd sub %r11,%rbp
b: 48 83 fd 10 cmp $0x10,%rbp
f: 7f 29 jg 0x3a
11: 48 85 ed test %rbp,%rbp
14: 0f 84 3e 01 00 00 je 0x158
1a: 4c 89 cd mov %r9,%rbp
1d: 48 f7 d5 not %rbp
20: 48 01 dd add %rbx,%rbp
* 23: 41 80 3b 00 cmpb $0x0,(%r11) <-- trapping instruction
27: 0f 85 c9 01 00 00 jne 0x1f6
2d: 49 ff c3 inc %r11
30: 48 ff c5 inc %rbp
33: 75 ee jne 0x23
35: e9 .byte 0xe9
36: 1e (bad)
37: 01 00 add %eax,(%rax)