reiserfs: using flush barriers
REISERFS (device loop0): journal params: device loop0, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
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BUG: KASAN: use-after-free in init_inode fs/reiserfs/inode.c:1326 [inline]
BUG: KASAN: use-after-free in reiserfs_read_locked_inode+0x2028/0x2190 fs/reiserfs/inode.c:1579
Read of size 4 at addr ffff88807cbeb000 by task syz-executor266/6342
CPU: 1 PID: 6342 Comm: syz-executor266 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load_n_noabort+0x6b/0x80 mm/kasan/report.c:440
init_inode fs/reiserfs/inode.c:1326 [inline]
reiserfs_read_locked_inode+0x2028/0x2190 fs/reiserfs/inode.c:1579
reiserfs_fill_super+0x1517/0x28b6 fs/reiserfs/super.c:2084
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0xe53/0x2a00 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446f4a
RSP: 002b:00007ffea32af388 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffea32af3e0 RCX: 0000000000446f4a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffea32af3a0
RBP: 00007ffea32af3a0 R08: 00007ffea32af3e0 R09: 00007ffe00000015
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000006
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003
The buggy address belongs to the page:
page:ffffea0001f2fac0 count:0 mapcount:0 mapping: (null) index:0x1
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 0000000000000001 00000000ffffffff
raw: ffffea0001f2fb20 ffff8880aeb2ed48 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88807cbeaf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88807cbeaf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88807cbeb000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff88807cbeb080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88807cbeb100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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