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KASAN: use-after-free Read in f2fs_evict_inode

Status: upstream: reported C repro on 2020/10/01 22:34
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+641d482b73464dd5d56e@syzkaller.appspotmail.com
First crash: 1541d, last: 655d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 KASAN: use-after-free Read in f2fs_evict_inode f2fs C 99 656d 1404d 0/1 upstream: reported C repro on 2021/02/15 22:59
▶ ▼ Fix bisection attempts (10)
Created Duration User Patch Repo Result
2021/10/28 11:47 16m bisect fix linux-4.19.y error job log
2021/09/23 14:53 26m bisect fix linux-4.19.y OK (0) job log log
2021/08/24 14:19 33m bisect fix linux-4.19.y OK (0) job log log
2021/07/25 13:37 30m bisect fix linux-4.19.y OK (0) job log log
2021/06/25 13:10 22m bisect fix linux-4.19.y OK (0) job log log
2021/04/30 20:35 22m bisect fix linux-4.19.y OK (0) job log log
2021/03/31 20:11 23m bisect fix linux-4.19.y OK (0) job log log
2021/01/24 02:30 30m bisect fix linux-4.19.y OK (0) job log log
2020/12/25 02:00 26m bisect fix linux-4.19.y OK (0) job log log
2020/11/25 01:35 25m bisect fix linux-4.19.y OK (0) job log log

Sample crash report:
F2FS-fs (loop0): invalid crc value
F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix.
F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.
F2FS-fs (loop0): Cannot turn on quotas: -2 on 1
==================================================================
BUG: KASAN: use-after-free in f2fs_evict_inode+0x100b/0x1330 fs/f2fs/inode.c:650
Read of size 4 at addr ffff88809516cf10 by task syz-executor397/8089

CPU: 1 PID: 8089 Comm: syz-executor397 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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_load4_noabort+0x88/0x90 mm/kasan/report.c:432
 f2fs_evict_inode+0x100b/0x1330 fs/f2fs/inode.c:650
 evict+0x2ed/0x760 fs/inode.c:559
 iput_final fs/inode.c:1555 [inline]
 iput+0x4f1/0x860 fs/inode.c:1581
 dentry_unlink_inode+0x265/0x320 fs/dcache.c:374
 __dentry_kill+0x3c0/0x640 fs/dcache.c:566
 dentry_kill+0xc4/0x510 fs/dcache.c:685
 shrink_dentry_list+0x2ab/0x6e0 fs/dcache.c:1092
 shrink_dcache_sb+0x144/0x220 fs/dcache.c:1212
 f2fs_fill_super+0x1461/0x7050 fs/f2fs/super.c:3225
 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: 0033:0x7f5e88bb12ea
Code: 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007f5e88b5d168 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5e88b5d1c0 RCX: 00007f5e88bb12ea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f5e88b5d180
RBP: 0000000000000008 R08: 00007f5e88b5d1c0 R09: 00007f5e88b5d6b8
R10: 0000000000000000 R11: 0000000000000286 R12: 00007f5e88b5d180
R13: 00000000200002c0 R14: 0000000000000004 R15: 0000000000000005

Allocated by task 8089:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 f2fs_fill_super+0xfd/0x7050 fs/f2fs/super.c:2821
 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

Freed by task 8089:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 f2fs_fill_super+0x1439/0x7050 fs/f2fs/super.c:3220
 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

The buggy address belongs to the object at ffff88809516c1c0
 which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 3408 bytes inside of
 8192-byte region [ffff88809516c1c0, ffff88809516e1c0)
The buggy address belongs to the page:
page:ffffea0002545b00 count:1 mapcount:0 mapping:ffff88813bff2080 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002a3a908 ffff88813bff1b48 ffff88813bff2080
raw: 0000000000000000 ffff88809516c1c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809516ce00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809516ce80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809516cf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88809516cf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809516d000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (391):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/06/04 12:23 linux-4.19.y 3f8a27f9e27b c8857892 .config console log report syz C ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2021/02/18 15:42 linux-4.19.y 811218eceeaa 14052202 .config console log report syz C ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2020/10/26 01:35 linux-4.19.y ad326970d25c a1839e81 .config console log report syz C ci2-linux-4-19
2020/10/02 08:07 linux-4.19.y b09c34517e1a 9602ddf4 .config console log report syz C ci2-linux-4-19
2023/03/07 09:09 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/06 20:12 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/06 15:47 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/06 14:07 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/06 03:01 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/05 19:45 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/04 03:41 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/03/01 23:09 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/28 14:43 linux-4.19.y 3f8a27f9e27b 95aee97a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/26 07:06 linux-4.19.y 3f8a27f9e27b ee50e71c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/24 23:30 linux-4.19.y 3f8a27f9e27b ee50e71c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/24 22:08 linux-4.19.y 3f8a27f9e27b ee50e71c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/23 11:31 linux-4.19.y 3f8a27f9e27b 9e2ebb3c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/20 21:35 linux-4.19.y 3f8a27f9e27b 2414209c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/20 18:51 linux-4.19.y 3f8a27f9e27b 2414209c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/20 13:37 linux-4.19.y 3f8a27f9e27b bcdf85f8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/19 15:59 linux-4.19.y 3f8a27f9e27b bcdf85f8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/14 06:00 linux-4.19.y 3f8a27f9e27b 93ae7e0a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/14 03:00 linux-4.19.y 3f8a27f9e27b 93ae7e0a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/11 01:50 linux-4.19.y 3f8a27f9e27b 93e26d60 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/10 05:46 linux-4.19.y 3f8a27f9e27b 07980f9d .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/09 19:24 linux-4.19.y 3f8a27f9e27b 07980f9d .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/09 08:15 linux-4.19.y 3f8a27f9e27b 14a312c8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/07 20:36 linux-4.19.y 3f8a27f9e27b 15c3d445 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/07 10:27 linux-4.19.y 3f8a27f9e27b 5bc3be51 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/07 02:12 linux-4.19.y 3f8a27f9e27b 0a9c11b6 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/06 13:47 linux-4.19.y 3f8a27f9e27b 0a9c11b6 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/05 20:15 linux-4.19.y 3f8a27f9e27b be607b78 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/04 23:23 linux-4.19.y 3f8a27f9e27b be607b78 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/04 15:09 linux-4.19.y 3f8a27f9e27b be607b78 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/04 06:07 linux-4.19.y 3f8a27f9e27b 1b2f701a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/04 05:18 linux-4.19.y 3f8a27f9e27b 1b2f701a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/03 23:15 linux-4.19.y 3f8a27f9e27b 1b2f701a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/03 21:24 linux-4.19.y 3f8a27f9e27b 1b2f701a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/03 15:05 linux-4.19.y 3f8a27f9e27b 1b2f701a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/02 10:08 linux-4.19.y 3f8a27f9e27b 9a6f477c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/02 08:36 linux-4.19.y 3f8a27f9e27b 9a6f477c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/02 05:03 linux-4.19.y 3f8a27f9e27b 9a6f477c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/02/02 03:41 linux-4.19.y 3f8a27f9e27b 9a6f477c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/01/30 05:37 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/01/30 04:04 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2023/01/29 19:59 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 KASAN: use-after-free Read in f2fs_evict_inode
2020/10/01 22:33 linux-4.19.y b09c34517e1a 9602ddf4 .config console log report info ci2-linux-4-19
* Struck through repros no longer work on HEAD.