------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 3324 at lib/refcount.c:28 refcount_warn_saturate+0xd0/0x130 lib/refcount.c:28
Modules linked in:
CPU: 0 UID: 0 PID: 3324 Comm: syz.0.15 Not tainted 6.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:refcount_warn_saturate+0xd0/0x130 lib/refcount.c:28
Code: 0b 90 90 e9 0d b3 3b 01 80 3d 9b 84 69 02 00 0f 85 75 ff ff ff c6 05 8e 84 69 02 01 90 48 c7 c7 38 b4 9e 83 e8 31 64 5e ff 90 <0f> 0b 90 90 e9 e2 b2 3b 01 80 3d 6e 84 69 02 00 0f 85 4a ff ff ff
RSP: 0018:ffffc90002debcc0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888102fb3400 RCX: 0000000000000000
RDX: 0000000000000203 RSI: 00000000ffffdfff RDI: 00000000ffffffff
RBP: ffff888104b11600 R08: 0000000000000000 R09: 0000000000000003
R10: ffffc90002debb60 R11: ffffffff83f84dc8 R12: ffff888104b11668
R13: 00000000ffffffff R14: ffff888103ba85e0 R15: ffff888103ba8608
FS:  00007fce7124a6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f55ded9a440 CR3: 0000000100f54000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kfree_skb_reason include/linux/skbuff.h:1260 [inline]
 kfree_skb include/linux/skbuff.h:1269 [inline]
 j1939_session_destroy+0x74/0x190 net/can/j1939/transport.c:282
 j1939_sk_queue_drop_all+0x7f/0xd0 net/can/j1939/socket.c:144
 j1939_sk_release+0x22e/0x240 net/can/j1939/socket.c:642
 __sock_release+0x38/0xc0 net/socket.c:659
 sock_close+0x13/0x20 net/socket.c:1421
 __fput+0xef/0x2c0 fs/file_table.c:422
 task_work_run+0x57/0x80 kernel/task_work.c:222
 get_signal+0x88/0x8e0 kernel/signal.c:2689
 arch_do_signal_or_restart+0x39/0x260 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xdb/0x1a0 kernel/entry/common.c:218
 do_syscall_64+0xc1/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce7037def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fce7124a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000155a9 RBX: 00007fce70535f80 RCX: 00007fce7037def9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007fce703f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fce70535f80 R15: 00007fff9ce1e0a8
 </TASK>