syzbot


kernel panic: stack is corrupted in shmem_undo_range

Status: moderation: reported on 2025/06/08 04:02
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+9054ef77020e22fbeb7c@syzkaller.appspotmail.com
First crash: 29d, last: 29d

Sample crash report:
loop0: detected capacity change from 0 to 4096
ntfs3(loop0): Mark volume as dirty due to NTFS errors
Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: shmem_undo_range+0x1335/0x14b0 mm/shmem.c:-1
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-11796-g5abc7438f1e9 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x99/0x250 lib/dump_stack.c:120
 panic+0x2db/0x790 kernel/panic.c:382
 __stack_chk_fail+0x26/0x30 kernel/panic.c:869
 shmem_undo_range+0x1335/0x14b0 mm/shmem.c:-1
 shmem_truncate_range mm/shmem.c:1237 [inline]
 shmem_evict_inode+0x272/0xa70 mm/shmem.c:1365
 evict+0x504/0x9c0 fs/inode.c:810
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 dput+0x19f/0x2b0 fs/dcache.c:911
 __fput+0x68e/0xa70 fs/file_table.c:473
 fput_close_sync+0x119/0x200 fs/file_table.c:570
 __do_sys_close fs/open.c:1589 [inline]
 __se_sys_close fs/open.c:1574 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1574
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f054298d5ca
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007f0543802e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f054298d5ca
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000564
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000006
R13: 00007f0543802ef0 R14: 00007f0543802eb0 R15: 00007f0536800000
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/04 03:58 upstream 5abc7438f1e9 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: stack is corrupted in shmem_undo_range
* Struck through repros no longer work on HEAD.