syzbot


WARNING in ext4_group_desc_csum

Status: auto-closed as invalid on 2019/12/15 10:02
Reported-by: syzbot+99bcc5f51651697b2020@syzkaller.appspotmail.com
First crash: 1705d, last: 1705d

Sample crash report:
EXT4-fs (loop4): mount failed
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
EXT4-fs (loop4): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock
EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 overlaps superblock
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16654 at fs/ext4/ext4.h:2721 ext4_has_metadata_csum fs/ext4/ext4.h:2721 [inline]
WARNING: CPU: 0 PID: 16654 at fs/ext4/ext4.h:2721 ext4_group_desc_csum.isra.0+0x537/0xa40 fs/ext4/super.c:2190
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 16654 Comm: syz-executor.4 Not tainted 4.9.189+ #2
 ffff8801b016f798 ffffffff81b65c01 0000000000000000 ffffffff82a3b1c0
 00000000ffffffff 0000000000000000 0000000000000009 ffff8801b016f878
 ffffffff813feb5a 0000000041b58ab3 ffffffff82e3260d ffffffff813fe981
Call Trace:
 [<00000000426ed3cf>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000426ed3cf>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000a43e3d00>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<00000000e89cd00f>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<000000007b57ec27>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<00000000a3485fc7>] ext4_has_metadata_csum fs/ext4/ext4.h:2721 [inline]
 [<00000000a3485fc7>] ext4_group_desc_csum.isra.0+0x537/0xa40 fs/ext4/super.c:2190
 [<0000000081d91fc3>] ext4_group_desc_csum_verify+0x111/0x170 fs/ext4/super.c:2232
 [<00000000c226df8c>] ext4_check_descriptors fs/ext4/super.c:2347 [inline]
 [<00000000c226df8c>] ext4_fill_super+0x4fbe/0xb7a0 fs/ext4/super.c:3959
 [<00000000ed67ae7c>] mount_bdev+0x2b8/0x360 fs/super.c:1110
 [<00000000cc53110b>] ext4_mount+0x35/0x40 fs/ext4/super.c:5627
 [<0000000046160e87>] mount_fs+0x27c/0x380 fs/super.c:1216
 [<00000000bd1b91a1>] vfs_kern_mount.part.0+0xcd/0x4c0 fs/namespace.c:1000
 [<000000002e89a4b6>] vfs_kern_mount fs/namespace.c:982 [inline]
 [<000000002e89a4b6>] do_new_mount fs/namespace.c:2549 [inline]
 [<000000002e89a4b6>] do_mount+0x3c4/0x2970 fs/namespace.c:2871
 [<00000000f719d5f5>] SYSC_mount fs/namespace.c:3087 [inline]
 [<00000000f719d5f5>] SyS_mount+0xab/0x120 fs/namespace.c:3064
 [<00000000fb83ea02>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000df7903c7>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/17 10:01 https://android.googlesource.com/kernel/common android-4.9 10c44c01f78e 8fd428a1 .config console log report ci-android-49-kasan-gce-root
* Struck through repros no longer work on HEAD.