BUG: stack guard page was hit in file_open (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 5287773dba0d Merge 5.10.106 into android12-5.10-lts
git tree: android12-5.10-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=13aa535d700000
kernel config: https://syzkaller.appspot.com/x/.config?x=58f0ccb364b6905c
dashboard link: https://syzkaller.appspot.com/bug?extid=179745eff42794aebee4
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f8d76d700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=179d5239700000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+179745...@syzkaller.appspotmail.com

BUG: stack guard page was hit at ffffc90000997ff8 (stack is ffffc90000998000..ffffc9000099ffff)
kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 367 Comm: syz-executor293 Not tainted 5.10.106-syzkaller-00514-g5287773dba0d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_raw_spin_lock_irqsave+0x8/0x210 kernel/locking/spinlock.c:158
Code: 8d 7c 24 20 e8 79 a0 0e fd e9 62 ff ff ff e8 7f 91 fd ff 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 49 89 fd 65 48 8b
RSP: 0018:ffffc90000998000 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000000002c40
RDX: 1ffff92000133028 RSI: ffffffff86bc0280 RDI: ffffffff86bc07c0
RBP: ffffc90000998010 R08: 0000000000000901 R09: 0000000000000000
R10: fffffbfff0d78114 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff86bc0280 R15: ffffffff86bc0280
FS: 0000555556c2e3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000997ff8 CR3: 0000000106dd2000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rmqueue+0x553/0x2480 mm/page_alloc.c:3586
get_page_from_freelist+0x471/0xa90 mm/page_alloc.c:4060
__alloc_pages_nodemask+0x3c8/0x820 mm/page_alloc.c:5107
__alloc_pages include/linux/gfp.h:529 [inline]
__alloc_pages_node include/linux/gfp.h:542 [inline]
alloc_pages_node include/linux/gfp.h:556 [inline]
alloc_pages include/linux/gfp.h:575 [inline]
stack_depot_save+0x35e/0x480 lib/stackdepot.c:303
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:428 [inline]
____kasan_kmalloc+0xf3/0x110 mm/kasan/common.c:507
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:516
kasan_kmalloc include/linux/kasan.h:269 [inline]
kmem_cache_alloc_trace+0x210/0x3a0 mm/slub.c:2981
kmalloc include/linux/slab.h:552 [inline]
kzalloc include/linux/slab.h:664 [inline]
incfs_open_dir_file+0xa5/0x140 fs/incfs/data_mgmt.c:407
file_open+0x354/0x650 fs/incfs/vfs.c:1460
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open+0x73/0x80 fs/open.c:942
do_open fs/namei.c:3327 [inline]
path_openat+0x264d/0x3500 fs/namei.c:3444
do_filp_open+0x200/0x440 fs/namei.c:3471
do_sys_openat2+0x13b/0x470 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f83a5739969
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcfa44cf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f83a5739969
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00007ffcfa44cf68 R09: 00007ffcfa44cf68
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcfa44cf60
R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
Modules linked in:
---[ end trace 25dd4efb2880d409 ]---
RIP: 0010:_raw_spin_lock_irqsave+0x8/0x210 kernel/locking/spinlock.c:158
Code: 8d 7c 24 20 e8 79 a0 0e fd e9 62 ff ff ff e8 7f 91 fd ff 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 49 89 fd 65 48 8b
RSP: 0018:ffffc90000998000 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000000002c40
RDX: 1ffff92000133028 RSI: ffffffff86bc0280 RDI: ffffffff86bc07c0
RBP: ffffc90000998010 R08: 0000000000000901 R09: 0000000000000000
R10: fffffbfff0d78114 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff86bc0280 R15: ffffffff86bc0280
FS: 0000555556c2e3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000997ff8 CR3: 0000000106dd2000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 8d 7c 24 20 lea 0x20(%rsp),%edi
4: e8 79 a0 0e fd callq 0xfd0ea082
9: e9 62 ff ff ff jmpq 0xffffff70
e: e8 7f 91 fd ff callq 0xfffd9192
13: 0f 0b ud2
15: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1c: 00 00 00 00
20: 66 90 xchg %ax,%ax
22: 55 push %rbp
23: 48 89 e5 mov %rsp,%rbp
26: 41 57 push %r15
28: 41 56 push %r14
* 2a: 41 55 push %r13 <-- trapping instruction
2c: 41 54 push %r12
2e: 53 push %rbx
2f: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
33: 48 81 ec a0 00 00 00 sub $0xa0,%rsp
3a: 49 89 fd mov %rdi,%r13
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b


---
This report is generated by a bot. It may contain errors.
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[syzbot]

syzbot has bisected this issue to:

commit 07630c80731a93d066b6365b53a033841baebd54
Author: Paul Lawrence <paulla...@google.com>
Date: Fri Feb 4 15:20:46 2022 +0000

Revert "ANDROID: incremental-fs: fix mount_fs issue"

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11eaadbd700000
start commit: 5287773dba0d Merge 5.10.106 into android12-5.10-lts
git tree: android12-5.10-lts
final oops: https://syzkaller.appspot.com/x/report.txt?x=13eaadbd700000
console output: https://syzkaller.appspot.com/x/log.txt?x=15eaadbd700000

kernel config: https://syzkaller.appspot.com/x/.config?x=58f0ccb364b6905c
dashboard link: https://syzkaller.appspot.com/bug?extid=179745eff42794aebee4

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f8d76d700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=179d5239700000

Reported-by: syzbot+179745...@syzkaller.appspotmail.com
Fixes: 07630c80731a ("Revert "ANDROID: incremental-fs: fix mount_fs issue"")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

[Tadeusz Struk]

#syz dup: BUG: stack guard page was hit in file_open

--
Thanks,
Tadeusz