EXT4-fs (loop5): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock
EXT4-fs (loop5): ext4_check_descriptors: Inode table for group 0 overlaps superblock
jbd2_journal_init_inode: Cannot locate journal superblock
EXT4-fs (loop5): Could not load journal inode
==================================================================
BUG: KASAN: slab-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:663 [inline]
BUG: KASAN: slab-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
BUG: KASAN: slab-out-of-bounds in bit_putcs+0xa8a/0xc00 drivers/video/fbdev/core/bitblit.c:185
Read of size 1 at addr ffff8880a9792c14 by task syz-executor.3/682

CPU: 0 PID: 682 Comm: syz-executor.3 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2b9 mm/kasan/report.c:393
 __fb_pad_aligned_buffer include/linux/fb.h:663 [inline]
 bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline]
 bit_putcs+0xa8a/0xc00 drivers/video/fbdev/core/bitblit.c:185
 fbcon_putcs+0x3bb/0x480 drivers/video/fbdev/core/fbcon.c:1301
 do_update_region+0x34b/0x5b0 drivers/tty/vt/vt.c:373
 redraw_screen+0x562/0x760 drivers/tty/vt/vt.c:705
 vc_do_resize+0xbe0/0xde0 drivers/tty/vt/vt.c:967
 vt_ioctl+0x1a64/0x1f20 drivers/tty/vt/vt_ioctl.c:901
 tty_ioctl+0x6c9/0x1220 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb19
RSP: 002b:00007f8473072c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004f35c0 RCX: 000000000045cb19
RDX: 0000000020001040 RSI: 000000000000560a RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000067f R14: 00000000004c9859 R15: 00007f84730736d4

Allocated by task 6347:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc.part.0+0x4f/0xd0 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 new_dir fs/proc/proc_sysctl.c:945 [inline]
 get_subdir fs/proc/proc_sysctl.c:990 [inline]
 __register_sysctl_table+0x783/0xe50 fs/proc/proc_sysctl.c:1333
 __devinet_sysctl_register+0x139/0x240 net/ipv4/devinet.c:2314
 devinet_sysctl_register net/ipv4/devinet.c:2354 [inline]
 devinet_sysctl_register+0x11b/0x1f0 net/ipv4/devinet.c:2344
 inetdev_init+0x204/0x410 net/ipv4/devinet.c:262
 inetdev_event+0xcb5/0x1020 net/ipv4/devinet.c:1462
 notifier_call_chain+0x107/0x1a0 kernel/notifier.c:93
 call_netdevice_notifiers net/core/dev.c:1687 [inline]
 register_netdevice+0xa39/0xca0 net/core/dev.c:7694
 veth_newlink+0x47c/0x8a0 drivers/net/veth.c:443
 rtnl_newlink+0xecb/0x1720 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x64a/0xbb0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880a9792ac0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 340 bytes inside of
 512-byte region [ffff8880a9792ac0, ffff8880a9792cc0)
The buggy address belongs to the page:
page:ffffea0002a5e480 count:1 mapcount:0 mapping:ffff8880a97920c0 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff8880a97920c0 0000000000000000 0000000100000006
raw: ffffea000285dba0 ffffea0002226360 ffff8880aa800940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a9792b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a9792b80: 00 00 00 00 00 00 00 00 07 fc fc fc fc fc fc fc
>ffff8880a9792c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                         ^
 ffff8880a9792c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880a9792d00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
==================================================================