syzbot


WARNING in minix_unlink

Status: upstream: reported C repro on 2025/09/20 04:19
Reported-by: syzbot+66aad91cc2ecbe7d3fcc@syzkaller.appspotmail.com
First crash: 10h15m, last: 24m
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in minix_unlink origin:upstream -1 C 104 3d22h 369d 0/3 upstream: reported C repro on 2024/09/15 23:46
upstream WARNING in minix_unlink fs -1 C inconclusive 422 4h50m 301d 0/29 upstream: reported C repro on 2024/11/22 18:44
linux-6.1 WARNING in minix_unlink origin:upstream -1 C error 52 27d 288d 0/3 upstream: reported C repro on 2024/12/06 04:33

Sample crash report:
Trying to free block not in datazone
Trying to free block not in datazone
Trying to free block not in datazone
minix_free_block (loop0:22): bit already cleared
minix_free_block (loop0:19): bit already cleared
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5889 at fs/inode.c:332 drop_nlink+0xbf/0x100 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 5889 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:drop_nlink+0xbf/0x100 fs/inode.c:332
Code: 48 8b 1b 48 8d bb 78 07 00 00 be 08 00 00 00 e8 a7 5d ea ff f0 48 ff 83 78 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 91 10 93 ff <0f> 0b eb 88 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c
RSP: 0018:ffffc900035efcb0 EFLAGS: 00010293
RAX: ffffffff81f2870f RBX: ffff88805d438040 RCX: ffff88801eadbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffea0001b1beb7 R09: 1ffffd40003637d6
R10: dffffc0000000000 R11: fffff940003637d7 R12: 1ffff1100ba87013
R13: 1ffff920006bdf9c R14: ffff88805d438098 R15: dffffc0000000000
FS:  0000555557b00500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557b2b648 CR3: 00000000770a5000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 inode_dec_link_count include/linux/fs.h:2340 [inline]
 minix_unlink+0x18b/0x1e0 fs/minix/namei.c:158
 vfs_unlink+0x389/0x600 fs/namei.c:4325
 do_unlinkat+0x328/0x570 fs/namei.c:4391
 __do_sys_unlink fs/namei.c:4439 [inline]
 __se_sys_unlink fs/namei.c:4437 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4437
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8d2278e1d7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007fff7d0165e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8d2278e1d7
RDX: 00007fff7d016610 RSI: 00007fff7d0166a0 RDI: 00007fff7d0166a0
RBP: 00007fff7d0166a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff7d017790
R13: 00007f8d22811c2d R14: 000000000000fc9b R15: 00007fff7d018860
 </TASK>

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/20 14:10 linux-6.6.y af1544b5d072 67c37560 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:32 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:31 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:30 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:26 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:25 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:24 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:22 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
2025/09/20 04:19 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in minix_unlink
* Struck through repros no longer work on HEAD.