XFS (loop2): Mounting V4 Filesystem
REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage.
XFS (loop2): Ending clean mount
XFS (loop2): Unmounting Filesystem
==================================================================
BUG: KASAN: use-after-free in tasklet_action_common.constprop.0+0x29e/0x360 kernel/softirq.c:515
Read of size 8 at addr ffff8880afb70550 by task syz-executor.1/1021

CPU: 1 PID: 1021 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 tasklet_action_common.constprop.0+0x29e/0x360 kernel/softirq.c:515
 __do_softirq+0x265/0x980 kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1092
 </IRQ>
 do_softirq.part.0+0x160/0x1c0 kernel/softirq.c:336
 do_softirq kernel/softirq.c:328 [inline]
 __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189
 sock_orphan include/net/sock.h:1805 [inline]
 bcm_release+0x733/0x950 net/can/bcm.c:1607
 __sock_release+0xcd/0x2a0 net/socket.c:599
 sock_close+0x15/0x20 net/socket.c:1214
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbf3/0x2be0 kernel/exit.c:870
 do_group_exit+0x125/0x310 kernel/exit.c:967
 get_signal+0x3f2/0x1f70 kernel/signal.c:2589
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f52dc89f0f9
Code: Bad RIP value.
RSP: 002b:00007f52dadcf218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f52dc9bf128 RCX: 00007f52dc89f0f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f52dc9bf128
RBP: 00007f52dc9bf120 R08: 0000000000000000 R09: 0000000000000000
XFS (loop2): Mounting V4 Filesystem
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f52dc9bf12c
R13: 00007ffc133b776f R14: 00007f52dadcf300 R15: 0000000000022000

Allocated by task 1020:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 bcm_tx_setup net/can/bcm.c:947 [inline]
 bcm_sendmsg+0x25d7/0x4150 net/can/bcm.c:1386
XFS (loop2): Ending clean mount
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
 __sys_sendmsg net/socket.c:2265 [inline]
 __do_sys_sendmsg net/socket.c:2274 [inline]
 __se_sys_sendmsg net/socket.c:2272 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 1021:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 bcm_release+0x260/0x950 net/can/bcm.c:1561
 __sock_release+0xcd/0x2a0 net/socket.c:599
 sock_close+0x15/0x20 net/socket.c:1214
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbf3/0x2be0 kernel/exit.c:870
 do_group_exit+0x125/0x310 kernel/exit.c:967
 get_signal+0x3f2/0x1f70 kernel/signal.c:2589
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880afb70480
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 208 bytes inside of
 1024-byte region [ffff8880afb70480, ffff8880afb70880)
The buggy address belongs to the page:
page:ffffea0002bedc00 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002756008 ffffea0002911108 ffff88813bff0ac0
raw: 0000000000000000 ffff8880afb70000 0000000100000007 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880afb70400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880afb70480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880afb70500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8880afb70580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880afb70600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================