loop0: detected capacity change from 512 to 0
EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
EXT4-fs (loop0): group descriptors corrupted!
==================================================================
BUG: KASAN: out-of-bounds in check_canary_byte mm/kfence/core.c:211 [inline]
BUG: KASAN: out-of-bounds in for_each_canary mm/kfence/core.c:245 [inline]
BUG: KASAN: out-of-bounds in kfence_guarded_free+0x7f1/0x8f0 mm/kfence/core.c:374
Read of size 1 at addr ffff88823bd44024 by task syz-executor249/9797

CPU: 1 PID: 9797 Comm: syz-executor249 Not tainted 5.10.0-next-20201223-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 check_canary_byte mm/kfence/core.c:211 [inline]
 for_each_canary mm/kfence/core.c:245 [inline]
 kfence_guarded_free+0x7f1/0x8f0 mm/kfence/core.c:374
 __kfence_free+0x70/0x150 mm/kfence/core.c:756
 do_slab_free mm/slub.c:3145 [inline]
 slab_free mm/slub.c:3158 [inline]
 kfree+0x368/0x3c0 mm/slub.c:4156
 crypto_destroy_tfm+0xc0/0x210 crypto/api.c:574
 crypto_free_shash include/crypto/hash.h:730 [inline]
 ext4_fill_super+0x64b/0xdf60 fs/ext4/super.c:5158
 mount_bdev+0x34d/0x410 fs/super.c:1366
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1496
 do_new_mount fs/namespace.c:2899 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3230
 do_mount fs/namespace.c:3243 [inline]
 __do_sys_mount fs/namespace.c:3451 [inline]
 __se_sys_mount fs/namespace.c:3428 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3428
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447cca
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffcf4198148 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf41981a0 RCX: 0000000000447cca
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcf4198160
RBP: 00007ffcf4198160 R08: 00007ffcf41981a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003

Allocated by task 2846403498:
------------[ cut here ]------------
slab index 831406 out of bounds (391) for stack id adacafae
WARNING: CPU: 1 PID: 9797 at lib/stackdepot.c:211 stack_depot_fetch+0x6d/0xa0 lib/stackdepot.c:211
Modules linked in:
CPU: 1 PID: 9797 Comm: syz-executor249 Not tainted 5.10.0-next-20201223-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:stack_depot_fetch+0x6d/0xa0 lib/stackdepot.c:211
Code: 48 c1 e0 04 25 f0 3f 00 00 48 01 d0 48 8d 50 18 48 89 13 8b 40 0c 48 83 c4 10 5b c3 89 f9 48 c7 c7 70 9b fa 8a e8 a1 c7 e9 04 <0f> 0b 48 83 c4 10 31 c0 5b c3 48 83 c4 10 31 c0 5b c3 48 c7 c7 00
RSP: 0018:ffffc90002d4f950 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffffc90002d4f970 RCX: 0000000000000000
RDX: ffff88801f41b600 RSI: ffffffff815b95f5 RDI: fffff520005a9f1c
RBP: ffffea0008ef5100 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815b7a4b R11: 0000000000000000 R12: ffff88823bd44024
R13: ffff88823bd44000 R14: ffff88823bd44040 R15: ffff88823bd44010
FS:  0000000001d6d880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043f1a0 CR3: 0000000014f47000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 print_stack+0x9/0x18 mm/kasan/report.c:114
 describe_object_stacks mm/kasan/report.c:176 [inline]
 describe_object mm/kasan/report.c:206 [inline]
 print_address_description.constprop.0.cold+0x21a/0x2f8 mm/kasan/report.c:237
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 check_canary_byte mm/kfence/core.c:211 [inline]
 for_each_canary mm/kfence/core.c:245 [inline]
 kfence_guarded_free+0x7f1/0x8f0 mm/kfence/core.c:374
 __kfence_free+0x70/0x150 mm/kfence/core.c:756
 do_slab_free mm/slub.c:3145 [inline]
 slab_free mm/slub.c:3158 [inline]
 kfree+0x368/0x3c0 mm/slub.c:4156
 crypto_destroy_tfm+0xc0/0x210 crypto/api.c:574
 crypto_free_shash include/crypto/hash.h:730 [inline]
 ext4_fill_super+0x64b/0xdf60 fs/ext4/super.c:5158
 mount_bdev+0x34d/0x410 fs/super.c:1366
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1496
 do_new_mount fs/namespace.c:2899 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3230
 do_mount fs/namespace.c:3243 [inline]
 __do_sys_mount fs/namespace.c:3451 [inline]
 __se_sys_mount fs/namespace.c:3428 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3428
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447cca
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffcf4198148 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffcf41981a0 RCX: 0000000000447cca
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcf4198160
RBP: 00007ffcf4198160 R08: 00007ffcf41981a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003