audit: type=1400 audit(1601598448.069:8): avc: denied { execmem } for pid=6348 comm="syz-executor540" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue Quota error (device loop0): qtree_write_dquot: Error -2147481216 occurred while creating quota BUG: unable to handle kernel paging request at fffffbfff000014f IP: __read_once_size include/linux/compiler.h:183 [inline] IP: atomic_read arch/x86/include/asm/atomic.h:27 [inline] IP: dqput.part.0+0x9d/0x750 fs/quota/dquot.c:761 PGD 21ffec067 P4D 21ffec067 PUD 21ffeb067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 6349 Comm: syz-executor540 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809757e000 task.stack: ffff888086cc0000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:dqput.part.0+0x9d/0x750 fs/quota/dquot.c:761 RSP: 0018:ffff888086cc7980 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffffffff80000980 RCX: 0000000000002176 RDX: 1ffffffff0f82502 RSI: 0000000000000001 RDI: ffffffff87c12804 RBP: dffffc0000000000 R08: ffffffff8a08d530 R09: 00000000000401ca R10: ffff88809757e8b0 R11: ffff88809757e000 R12: 0000000000000003 R13: fffffbfff000014f R14: ffffffff80000a98 R15: ffffffff80000a78 FS: 0000000002677880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff000014f CR3: 0000000094995000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dqput fs/quota/dquot.c:748 [inline] dqput_all fs/quota/dquot.c:391 [inline] __dquot_drop+0x193/0x250 fs/quota/dquot.c:1564 dquot_drop fs/quota/dquot.c:1589 [inline] dquot_drop+0x13e/0x190 fs/quota/dquot.c:1567 ext4_clear_inode+0x31/0x1d0 fs/ext4/super.c:1110 ext4_evict_inode+0x1f1/0x1500 fs/ext4/inode.c:347 evict+0x2c8/0x700 fs/inode.c:555 dispose_list+0x109/0x1e0 fs/inode.c:590 evict_inodes+0x2cd/0x3a0 fs/inode.c:640 generic_shutdown_super+0xb3/0x370 fs/super.c:438 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xa08/0x27f0 kernel/exit.c:865 do_group_exit+0x100/0x2e0 kernel/exit.c:962 SYSC_exit_group kernel/exit.c:973 [inline] SyS_exit_group+0x19/0x20 kernel/exit.c:971 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x443918 RSP: 002b:00007ffc7a582e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443918 RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00000000004c3e30 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 Code: 8d b3 18 01 00 00 49 c1 ed 03 41 83 e4 07 49 01 ed 41 83 c4 03 e8 a4 82 70 01 e8 7f 82 b7 ff 48 c7 c7 00 28 c1 87 e8 13 78 b1 04 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 cf 04 00 00 8b 83 f8 RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff888086cc7980 RIP: atomic_read arch/x86/include/asm/atomic.h:27 [inline] RSP: ffff888086cc7980 RIP: dqput.part.0+0x9d/0x750 fs/quota/dquot.c:761 RSP: ffff888086cc7980 CR2: fffffbfff000014f ---[ end trace 68d5dc94bb695a40 ]---