REISERFS (device loop0): journal params: device loop0, size 15748, journal first block 18, max trans len 1024, max batch 900, max commit age 0, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format ================================================================== BUG: KASAN: use-after-free in bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] BUG: KASAN: use-after-free in search_by_entry_key+0xcda/0xf30 fs/reiserfs/namei.c:164 Read of size 4 at addr ffff88808aaf37c4 by task syz-executor205/8110 CPU: 0 PID: 8110 Comm: syz-executor205 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] search_by_entry_key+0xcda/0xf30 fs/reiserfs/namei.c:164 reiserfs_find_entry.part.0+0x142/0x1480 fs/reiserfs/namei.c:321 reiserfs_find_entry fs/reiserfs/namei.c:367 [inline] reiserfs_lookup+0x24a/0x490 fs/reiserfs/namei.c:367 __lookup_slow+0x246/0x4a0 fs/namei.c:1672 lookup_one_len+0x163/0x190 fs/namei.c:2544 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:970 reiserfs_fill_super+0x18e8/0x2d80 fs/reiserfs/super.c:2205 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0569f6df4a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 98 03 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007ffda33d87a8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffda33d8800 RCX: 00007f0569f6df4a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffda33d87c0 RBP: 0000000000000003 R08: 00007ffda33d8800 R09: 0000000000000000 R10: 0000000000010001 R11: 0000000000000286 R12: 00007ffda33d87c0 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000004 The buggy address belongs to the page: page:ffffea00022abcc0 count:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea00022abd08 ffff8880ba02ea88 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808aaf3680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808aaf3700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88808aaf3780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808aaf3800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808aaf3880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================