syzbot


WARNING in incfs_realloc_mount_info

Status: premoderation: reported C repro on 2025/06/20 16:31
Reported-by: syzbot+75ff1aecfbeeefb78736@syzkaller.appspotmail.com
First crash: 8h32m, last: 8h03m

Sample crash report:
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
------------[ cut here ]------------
WARNING: CPU: 0 PID: 298 at mm/page_alloc.c:5157 __alloc_pages_noprof+0xe4/0x6c0 mm/page_alloc.c:5157
Modules linked in:
CPU: 0 UID: 0 PID: 298 Comm: syz-executor189 Not tainted 6.12.23-syzkaller-g6c1c18fcb8b7 #0 ba78288b1e32eb9f88d3f8d8da6b79a037cd8362
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__alloc_pages_noprof+0xe4/0x6c0 mm/page_alloc.c:5157
Code: 0f 1f 44 00 00 41 83 fd 0b 72 28 b8 00 20 00 00 23 44 24 40 75 1d 80 3d a4 78 ee 05 00 0f 85 c4 00 00 00 c6 05 97 78 ee 05 01 <0f> 0b 31 c0 e9 b6 00 00 00 41 83 fd 0a 0f 87 aa 00 00 00 44 89 6c
RSP: 0018:ffffc9000122f8a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff92000245f18 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000122f948
RBP: ffffc9000122f9d0 R08: ffffc9000122f947 R09: 0000000000000000
R10: ffffc9000122f930 R11: fffff52000245f29 R12: ffffc9000122f8e0
R13: 000000000000000e R14: dffffc0000000000 R15: 0000000000000000
FS:  0000555565b1f380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000107a96000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 ___kmalloc_large_node+0x9c/0x1d0 mm/slub.c:4293
 __kmalloc_large_node_noprof+0x1e/0xe0 mm/slub.c:4322
 __do_kmalloc_node mm/slub.c:4338 [inline]
 __kmalloc_noprof+0x26d/0x450 mm/slub.c:4362
 kmalloc_noprof include/linux/slab.h:885 [inline]
 kzalloc_noprof include/linux/slab.h:1017 [inline]
 incfs_realloc_mount_info+0xa7/0x4d0 fs/incfs/data_mgmt.c:113
 incfs_alloc_mount_info+0x479/0x600 fs/incfs/data_mgmt.c:84
 incfs_mount_fs+0x3ca/0x960 fs/incfs/vfs.c:1854
 legacy_get_tree+0x103/0x1b0 fs/fs_context.c:662
 vfs_get_tree+0x9e/0x290 fs/super.c:1817
 do_new_mount+0x251/0xb40 fs/namespace.c:3514
 path_mount+0x688/0x1050 fs/namespace.c:3841
 do_mount fs/namespace.c:3854 [inline]
 __do_sys_mount fs/namespace.c:4064 [inline]
 __se_sys_mount+0x2bd/0x480 fs/namespace.c:4041
 __x64_sys_mount+0xc3/0xf0 fs/namespace.c:4041
 x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6690937ea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 18 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdbfb959c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6690937ea9
RDX: 0000200000000480 RSI: 0000200000000440 RDI: 0000200000000400
RBP: 0000200000000440 R08: 00002000000006c0 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000246 R12: 0000200000000480
R13: 00002000000006c0 R14: 00007f669098111d R15: 0000000000000000
 </TASK>
---[ end trace 0000000000000000 ]---
incfs: Error allocating mount info. -12
incfs: mount failed -12

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/20 16:59 android16-6.12 6c1c18fcb8b7 804b3919 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in incfs_realloc_mount_info
2025/06/20 16:30 android16-6.12 6c1c18fcb8b7 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in incfs_realloc_mount_info
2025/06/20 16:30 android16-6.12 6c1c18fcb8b7 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in incfs_realloc_mount_info
* Struck through repros no longer work on HEAD.