audit: type=1400 audit(1602971047.378:25): avc:  denied  { dac_override } for  pid=14668 comm="syz-executor.4" capability=1  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=cap_userns permissive=1
================================================================================
UBSAN: Undefined behaviour in fs/f2fs/super.c:2227:16
shift exponent 768 is too large for 32-bit type 'int'
CPU: 1 PID: 14676 Comm: syz-executor.5 Not tainted 4.19.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422
 sanity_check_raw_super fs/f2fs/super.c:2227 [inline]
 read_raw_super_block fs/f2fs/super.c:2631 [inline]
 f2fs_fill_super.cold+0x1f9/0x5fb fs/f2fs/super.c:2842
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x318 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x51c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4608aa
Code: 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 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f2d2541ea88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2d2541eb20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2d2541eae0
RBP: 00007f2d2541eae0 R08: 00007f2d2541eb20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
IPVS: ftp: loaded support on port[0] = 21
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020000140
================================================================================
gfs2: invalid mount option: smackfshat=%!}!]&(/
gfs2: can't parse mount arguments
IPVS: ftp: loaded support on port[0] = 21
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.5'.
IPVS: ftp: loaded support on port[0] = 21
EXT4-fs (loop5): VFS: Can't find ext4 filesystem
EXT4-fs (loop5): VFS: Can't find ext4 filesystem
audit: type=1800 audit(1602971052.128:26): pid=15089 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed comm="syz-executor.4" name="bus" dev="sda1" ino=16404 res=0
audit: type=1800 audit(1602971052.168:27): pid=15152 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="sda1" ino=16404 res=0
ptrace attach of "/root/syz-executor.1"[15261] was attempted by "/root/syz-executor.1"[15262]
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21