syzbot
BUG: unable to handle kernel paging request in preempt_schedule_irq
Status:
upstream: reported C repro on 2025/04/28 12:49
Bug presence:
origin:upstream
[Documentation on labels]
Reported-by: syzbot+20d9f172fbffe19fe12f@syzkaller.appspotmail.com
Fix commit:
7375f22495e7
fs/buffer: fix use-after-free when call bh_read() helper
Patched on: [ci2-linux-5-15-kasan ci2-linux-5-15-kasan-perf], missing on: [ci2-linux-5-15-kasan-arm64]
First crash: 475d, last: 355d
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Bug presence (1)
| Date |
Name |
Commit |
Repro |
Result |
| 2025/04/29 |
upstream (ToT) |
ca91b9500108 |
C
|
[report] kernel panic: stack is corrupted in __schedule
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Last patch testing requests (10)
Sample crash report:
ntfs3: loop1: Different NTFS' sector size (2048) and media sector size (512)
BUG: unable to handle page fault for address: ffffed11046a43b7
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffef067 P4D 23ffef067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4195 Comm: syz-executor349 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline]
RIP: 0010:need_resched include/linux/sched.h:2111 [inline]
RIP: 0010:preempt_schedule_irq+0xf6/0x150 kernel/sched/core.c:6783
Code: 90 76 d4 f7 bf 01 00 00 00 e8 96 f2 a7 f7 65 48 8b 1d 2e 06 59 76 48 89 df be 08 00 00 00 e8 31 c9 13 f8 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 91 48 89 df e8 8b c7 13 f8 eb 87 48 c7 04 24 0e
RSP: 0018:ffffc90002edf9e0 EFLAGS: 00010806
RAX: 1ffff110046a43b8 RBX: ffff888023521dc0 RCX: ffffffff89a9699f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888023521dc0
RBP: ffffc90002edfa90 R08: dffffc0000000000 R09: ffffed10046a43b9
R10: ffffed10046a43b9 R11: 1ffff110046a43b8 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff920005dbf3c
FS: 000055555b634380(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed11046a43b7 CR3: 000000002453a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
irqentry_exit+0x63/0x70 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x32/0x80 kernel/kcov.c:293
Code: 44 ae 8a 7e 65 8b 15 45 ae 8a 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 5b 83 b9 34 16 00 00 00 74 52 8b 91 10 16 00 00 <83> fa 03 75 47 48 8b 91 18 16 00 00 44 8b 89 14 16 00 00 49 c1 e1
RSP: 0018:ffffc90002edfb58 EFLAGS: 00000246
RAX: ffffffff829bbaa6 RBX: 0000000000000090 RCX: ffff888023521dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002edfd28 R08: ffff888023521dc0 R09: 0000000000000002
R10: 00000000000000e0 R11: 0000000000000000 R12: ffff88801f8c0000
R13: ffffffffffffffff R14: 0000000000000070 R15: 00000000000005a0
ntfs_fill_super+0x32e6/0x3c10 fs/ntfs3/super.c:1173
get_tree_bdev+0x3f1/0x610 fs/super.c:1325
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x24a/0xa40 fs/namespace.c:3013
do_mount fs/namespace.c:3356 [inline]
__do_sys_mount fs/namespace.c:3564 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3541
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fda3b9c975a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffea3116a58 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda3b9c975a
RDX: 000020000001f340 RSI: 0000200000000040 RDI: 00007ffea3116ab0
RBP: 0000000000000004 R08: 00007ffea3116af0 R09: 000000000001f32b
R10: 0000000000000890 R11: 0000000000000286 R12: 0000000000200000
R13: 00007ffea3116af0 R14: 0000200000000040 R15: 0000000000000003
</TASK>
Modules linked in:
CR2: ffffed11046a43b7
---[ end trace 889acc64faaac20a ]---
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline]
RIP: 0010:need_resched include/linux/sched.h:2111 [inline]
RIP: 0010:preempt_schedule_irq+0xf6/0x150 kernel/sched/core.c:6783
Code: 90 76 d4 f7 bf 01 00 00 00 e8 96 f2 a7 f7 65 48 8b 1d 2e 06 59 76 48 89 df be 08 00 00 00 e8 31 c9 13 f8 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 91 48 89 df e8 8b c7 13 f8 eb 87 48 c7 04 24 0e
RSP: 0018:ffffc90002edf9e0 EFLAGS: 00010806
RAX: 1ffff110046a43b8 RBX: ffff888023521dc0 RCX: ffffffff89a9699f
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888023521dc0
RBP: ffffc90002edfa90 R08: dffffc0000000000 R09: ffffed10046a43b9
R10: ffffed10046a43b9 R11: 1ffff110046a43b8 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff920005dbf3c
FS: 000055555b634380(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed11046a43b7 CR3: 000000002453a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 90 nop
1: 76 d4 jbe 0xffffffd7
3: f7 bf 01 00 00 00 idivl 0x1(%rdi)
9: e8 96 f2 a7 f7 call 0xf7a7f2a4
e: 65 48 8b 1d 2e 06 59 mov %gs:0x7659062e(%rip),%rbx # 0x76590644
15: 76
16: 48 89 df mov %rbx,%rdi
19: be 08 00 00 00 mov $0x8,%esi
1e: e8 31 c9 13 f8 call 0xf813c954
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 91 je 0xffffffc2
31: 48 89 df mov %rbx,%rdi
34: e8 8b c7 13 f8 call 0xf813c7c4
39: eb 87 jmp 0xffffffc2
3b: 48 rex.W
3c: c7 .byte 0xc7
3d: 04 24 add $0x24,%al
3f: 0e (bad)
* Struck through repros no longer work on HEAD.