BUG: unable to handle page fault for address: fffffbfffc03afdb
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 21fff3067 P4D 21fff3067 PUD 21ffb6067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 380 Comm: syz-executor.0 Not tainted 5.4.68-syzkaller-00474-g2a7d52383a14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:181 [inline]
RIP: 0010:check_memory_region+0x70/0x2f0 mm/kasan/generic.c:191
Code: 49 bd 01 00 00 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 2b 4d 85 f6 0f 84 b9 01 00 00 4c 89 cb 4c 29 d3 66 90 <45> 0f b6 19 45 84 db 0f 85 03 02 00 00 49 ff c1 48 ff c3 75 eb e9
RSP: 0018:ffff8881a0a079d0 EFLAGS: 00010293
RAX: b8a88c24c3c35f01 RBX: fffffffffffffffe RCX: ffffffff818f09d4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffe01d7ede
RBP: ffffffffe01d7e7a R08: dffffc0000000000 R09: fffffbfffc03afdb
R10: fffffbfffc03afdd R11: 0000000000000004 R12: 1ffffffffc03afdb
R13: dffffc0000000001 R14: 0000000000000002 R15: ffffffffe01d7ede
FS:  0000000002e8a940(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfffc03afdb CR3: 00000001a09cc001 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 dqput+0x74/0x770 fs/quota/dquot.c:771
 dqput_all fs/quota/dquot.c:396 [inline]
 __dquot_drop fs/quota/dquot.c:1578 [inline]
 dquot_drop+0x1dd/0x2a0 fs/quota/dquot.c:1603
 ext4_clear_inode+0x4c/0x170 fs/ext4/super.c:1189
 ext4_evict_inode+0x714/0x1a70 fs/ext4/inode.c:349
 evict+0x29b/0x6a0 fs/inode.c:576
 dispose_list fs/inode.c:611 [inline]
 evict_inodes+0x608/0x690 fs/inode.c:661
 generic_shutdown_super+0x8f/0x2a0 fs/super.c:454
 kill_block_super+0x79/0xd0 fs/super.c:1444
 deactivate_locked_super+0xaf/0x100 fs/super.c:335
 deactivate_super+0x1b8/0x280 fs/super.c:366
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102
 task_work_run+0x176/0x1a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x286/0x2e0 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4607c7
Code: 64 89 04 25 d0 02 00 00 58 5f ff d0 48 89 c7 e8 2f be ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff5a1f0958 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004607c7
RDX: 0000000000403158 RSI: 0000000000000002 RDI: 00007fff5a1f0a00
RBP: 00000000000002fe R08: 0000000000000000 R09: 000000000000000b
R10: 0000000000000005 R11: 0000000000000246 R12: 00007fff5a1f1a90
R13: 0000000002e8b940 R14: 0000000000000000 R15: 00007fff5a1f1a90
Modules linked in:
CR2: fffffbfffc03afdb
---[ end trace df913c2b3c106dc5 ]---
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:181 [inline]
RIP: 0010:check_memory_region+0x70/0x2f0 mm/kasan/generic.c:191
Code: 49 bd 01 00 00 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 2b 4d 85 f6 0f 84 b9 01 00 00 4c 89 cb 4c 29 d3 66 90 <45> 0f b6 19 45 84 db 0f 85 03 02 00 00 49 ff c1 48 ff c3 75 eb e9
RSP: 0018:ffff8881a0a079d0 EFLAGS: 00010293
RAX: b8a88c24c3c35f01 RBX: fffffffffffffffe RCX: ffffffff818f09d4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffe01d7ede
RBP: ffffffffe01d7e7a R08: dffffc0000000000 R09: fffffbfffc03afdb
R10: fffffbfffc03afdd R11: 0000000000000004 R12: 1ffffffffc03afdb
R13: dffffc0000000001 R14: 0000000000000002 R15: ffffffffe01d7ede
FS:  0000000002e8a940(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfffc03afdb CR3: 00000001a09cc001 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600