syzbot


kernel BUG in migration_entry_to_page

Status: auto-obsoleted due to no activity on 2025/08/23 22:25
First crash: 90d, last: 90d

Sample crash report:
------------[ cut here ]------------
kernel BUG at include/linux/swapops.h:195!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2660 Comm: syz.0.645 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:migration_entry_to_page+0x111/0x120 include/linux/swapops.h:195
Code: 89 d8 5b 41 5c 41 5e 41 5f 5d c3 e8 99 f7 d9 ff 49 ff ce e9 74 ff ff ff e8 8c f7 d9 ff 49 ff cf 4d 89 fe eb 9c e8 7f f7 d9 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41
RSP: 0018:ffff8881e5697810 EFLAGS: 00010283
RAX: ffffffff81858761 RBX: fffff8efc21feb80 RCX: 0000000000080000
RDX: ffffc90001d49000 RSI: 000000000000c7a0 RDI: 000000000000c7a1
RBP: ffff8881e5697830 R08: dffffc0000000000 R09: fffffb1df843fd71
R10: fffffb1df843fd71 R11: 1fffff1df843fd70 R12: dffffc0000000000
R13: 7c00000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f4916afb6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4916afaf98 CR3: 00000001eb819000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 00002000000001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 copy_one_pte mm/memory.c:736 [inline]
 copy_pte_range mm/memory.c:855 [inline]
 copy_pmd_range mm/memory.c:906 [inline]
 copy_pud_range mm/memory.c:940 [inline]
 copy_p4d_range mm/memory.c:962 [inline]
 copy_page_range+0x118e/0x1730 mm/memory.c:1024
 dup_mmap kernel/fork.c:608 [inline]
 dup_mm kernel/fork.c:1379 [inline]
 copy_mm+0xb65/0x1150 kernel/fork.c:1435
 copy_process+0x1163/0x2cf0 kernel/fork.c:2052
 _do_fork+0x190/0x860 kernel/fork.c:2399
 __do_sys_clone kernel/fork.c:2557 [inline]
 __se_sys_clone kernel/fork.c:2538 [inline]
 __x64_sys_clone+0x12e/0x160 kernel/fork.c:2538
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f49184d4969
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:00007f4916afafe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f49186fc160 RCX: 00007f49184d4969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4918556ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f49186fc160 R15: 00007ffde3c72078
Modules linked in:
---[ end trace 5ced835cf46b184b ]---
RIP: 0010:migration_entry_to_page+0x111/0x120 include/linux/swapops.h:195
Code: 89 d8 5b 41 5c 41 5e 41 5f 5d c3 e8 99 f7 d9 ff 49 ff ce e9 74 ff ff ff e8 8c f7 d9 ff 49 ff cf 4d 89 fe eb 9c e8 7f f7 d9 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41
RSP: 0018:ffff8881e5697810 EFLAGS: 00010283
RAX: ffffffff81858761 RBX: fffff8efc21feb80 RCX: 0000000000080000
RDX: ffffc90001d49000 RSI: 000000000000c7a0 RDI: 000000000000c7a1
RBP: ffff8881e5697830 R08: dffffc0000000000 R09: fffffb1df843fd71
R10: fffffb1df843fd71 R11: 1fffff1df843fd70 R12: dffffc0000000000
R13: 7c00000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f4916afb6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4916afaf98 CR3: 00000001eb819000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 00002000000001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/25 22:25 android12-5.4 cd8e74fa0fa3 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-perf-kasan kernel BUG in migration_entry_to_page
* Struck through repros no longer work on HEAD.