syzbot


BUG: unable to handle kernel paging request in __task_rq_lock

Status: upstream: reported on 2024/09/24 09:22
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+5c756f98a0b65d89e058@syzkaller.appspotmail.com
First crash: 25d, last: 22d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [net?] BUG: unable to handle kernel paging request in __task_rq_lock 0 (1) 2024/09/24 09:22

Sample crash report:
BUG: unable to handle page fault for address: fffffbfff35395f2
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 13fff0067 PTE 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5890 Comm: syz.4.41 Not tainted 6.11.0-syzkaller-07462-g1868f9d0260e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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:ffffc900034ff200 EFLAGS: 00010086
RAX: 0000000000cef701 RBX: 1ffffffff35395f2 RCX: ffffffff81703cdb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9a9caf90
RBP: ffffffffffffffff R08: ffffffff9a9caf97 R09: 1ffffffff35395f2
R10: dffffc0000000000 R11: fffffbfff35395f2 R12: ffff8880207e3c00
R13: ffff8880207e46d8 R14: dffffc0000000001 R15: fffffbfff35395f3
FS:  00007f01a5cf36c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff35395f2 CR3: 0000000068d60000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xc8b/0x2050 kernel/locking/lockdep.c:5169
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:585
 raw_spin_rq_lock kernel/sched/sched.h:1423 [inline]
 __task_rq_lock+0xdf/0x3e0 kernel/sched/core.c:663
 ttwu_runnable kernel/sched/core.c:3710 [inline]
 try_to_wake_up+0x182/0x1480 kernel/sched/core.c:4153
 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+0x5f4/0x12f0 net/unix/af_unix.c:2462
 sock_recvmsg_nosec+0x190/0x1d0 net/socket.c:1052
 ____sys_recvmsg+0x3cd/0x480 net/socket.c:2820
 ___sys_recvmsg net/socket.c:2864 [inline]
 do_recvmmsg+0x46e/0xad0 net/socket.c:2958
 __sys_recvmmsg net/socket.c:3037 [inline]
 __do_sys_recvmmsg net/socket.c:3060 [inline]
 __se_sys_recvmmsg net/socket.c:3053 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3053
 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: 0033:0x7f01a4f7def9
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:00007f01a5cf3038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f01a5136058 RCX: 00007f01a4f7def9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00007f01a4ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f01a5136058 R15: 00007ffd3423d908
 </TASK>
Modules linked in:
CR2: fffffbfff35395f2
---[ 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:ffffc900034ff200 EFLAGS: 00010086
RAX: 0000000000cef701 RBX: 1ffffffff35395f2 RCX: ffffffff81703cdb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9a9caf90
RBP: ffffffffffffffff R08: ffffffff9a9caf97 R09: 1ffffffff35395f2
R10: dffffc0000000000 R11: fffffbfff35395f2 R12: ffff8880207e3c00
R13: ffff8880207e46d8 R14: dffffc0000000001 R15: fffffbfff35395f3
FS:  00007f01a5cf36c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff35395f2 CR3: 0000000068d60000 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)

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/21 15:19 upstream 1868f9d0260e 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __task_rq_lock
2024/09/21 01:05 upstream baeb9a7d8b60 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __task_rq_lock
2024/09/21 00:59 upstream baeb9a7d8b60 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __task_rq_lock
2024/09/20 09:18 upstream 2004cef11ea0 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __task_rq_lock
2024/09/22 23:30 upstream af9c191ac2a0 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __task_rq_lock
* Struck through repros no longer work on HEAD.