BUG: unable to handle page fault for address: fffffbfff6ac75bb #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffe5067 P4D 21ffe5067 PUD 21ffe4067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6880 Comm: syz-executor.4 Not tainted 5.9.0-rc7-syzkaller #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:183 [inline] RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192 Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c RSP: 0018:ffffc900056f7a50 EFLAGS: 00010286 RAX: fffffbfff6ac75bb RBX: fffffbfff6ac75bd RCX: ffffffff81e5263f RDX: fffffbfff6ac75bd RSI: 0000000000000004 RDI: ffffffffb563addf RBP: fffffbfff6ac75bb R08: 0000000000000000 R09: ffffffffb563ade2 R10: fffffbfff6ac75bc R11: 0000000000000000 R12: ffffffffb563adff R13: ffffffffb563addf R14: 000000000000000a R15: 1ffffffff6ac75bb FS: 0000000001dbf940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff6ac75bb CR3: 000000004d884000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:56 [inline] atomic_read include/asm-generic/atomic-instrumented.h:27 [inline] dqput.part.0+0xaf/0x870 fs/quota/dquot.c:770 dqput fs/quota/dquot.c:757 [inline] dqput_all fs/quota/dquot.c:397 [inline] __dquot_drop+0x19c/0x270 fs/quota/dquot.c:1577 dquot_drop fs/quota/dquot.c:1602 [inline] dquot_drop+0x14b/0x1a0 fs/quota/dquot.c:1580 ext4_clear_inode+0x4a/0x1e0 fs/ext4/super.c:1226 ext4_evict_inode+0x17e/0x11e0 fs/ext4/inode.c:330 evict+0x2ed/0x750 fs/inode.c:576 dispose_list+0x117/0x1d0 fs/inode.c:611 evict_inodes+0x350/0x440 fs/inode.c:661 generic_shutdown_super+0xab/0x370 fs/super.c:454 kill_block_super+0x97/0xf0 fs/super.c:1444 deactivate_locked_super+0x94/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x3a3/0x530 fs/namespace.c:1118 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:165 [inline] exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267 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:00007ffcd9450c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000004607c7 RDX: 0000000000403158 RSI: 0000000000000002 RDI: 00007ffcd9450d20 RBP: 0000000000000ccd R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000005 R11: 0000000000000246 R12: 00007ffcd9451db0 R13: 0000000001dc0a60 R14: 0000000000000000 R15: 00007ffcd9451db0 Modules linked in: CR2: fffffbfff6ac75bb ---[ end trace e6009a40ad96cbc5 ]--- 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:183 [inline] RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192 Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c RSP: 0018:ffffc900056f7a50 EFLAGS: 00010286 RAX: fffffbfff6ac75bb RBX: fffffbfff6ac75bd RCX: ffffffff81e5263f RDX: fffffbfff6ac75bd RSI: 0000000000000004 RDI: ffffffffb563addf RBP: fffffbfff6ac75bb R08: 0000000000000000 R09: ffffffffb563ade2 R10: fffffbfff6ac75bc R11: 0000000000000000 R12: ffffffffb563adff R13: ffffffffb563addf R14: 000000000000000a R15: 1ffffffff6ac75bb FS: 0000000001dbf940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff6ac75bb CR3: 000000004d884000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400