Subject: [syzbot] WARNING in j1939_tp_rxtimer

From: syzbot <[email-masked]>
Date: Tue, 16 Nov 2021 08:23:20 -0800

Hello,

syzbot found the following issue on:

HEAD commit:    5833291ab6de Merge tag 'pci-v5.16-fixes-1' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1125a676b00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2897a869f0607967
dashboard link: https://syzkaller.appspot.com/bug?extid=23df5d97f6d7d7e8a71c
compiler:       Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

vcan0: j1939_xtp_rx_dat: no rx connection found
vcan0: j1939_xtp_rx_dat_one: 0xffff8880261c9c00: last 00
vcan0: j1939_xtp_rx_dat: no rx connection found
vcan0: j1939_tp_rxtimer: 0xffff8880261cd800: abort rx timeout. Force session deactivation
------------[ cut here ]------------
WARNING: CPU: 1 PID: 20 at net/can/j1939/transport.c:1090 j1939_session_deactivate net/can/j1939/transport.c:1090 [inline]
WARNING: CPU: 1 PID: 20 at net/can/j1939/transport.c:1090 j1939_session_deactivate_activate_next net/can/j1939/transport.c:1100 [inline]
WARNING: CPU: 1 PID: 20 at net/can/j1939/transport.c:1090 j1939_tp_rxtimer+0x821/0xa20 net/can/j1939/transport.c:1228
Modules linked in:
CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_long defense_work_handler
RIP: 0010:j1939_session_deactivate net/can/j1939/transport.c:1090 [inline]
RIP: 0010:j1939_session_deactivate_activate_next net/can/j1939/transport.c:1100 [inline]
RIP: 0010:j1939_tp_rxtimer+0x821/0xa20 net/can/j1939/transport.c:1228
Code: e8 14 d1 6c f8 48 8b 3c 24 e9 0a f9 ff ff e8 06 d1 6c f8 4c 89 f7 be 03 00 00 00 e8 69 20 fe fa e9 52 f9 ff ff e8 ef d0 6c f8 <0f> 0b e9 fa f9 ff ff e8 e3 d0 6c f8 0f 0b e9 21 fb ff ff e8 d7 d0
RSP: 0018:ffffc90000dc0cb0 EFLAGS: 00010246
RAX: ffffffff89178381 RBX: 0000000000000001 RCX: ffff888012108000
RDX: 0000000000000302 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffffff89177d74 R09: ffffed1004c39b06
R10: ffffed1004c39b06 R11: 0000000000000000 R12: 1ffff11004c39b00
R13: ffff8880261cd800 R14: 1ffff11004c39b1b R15: ffff8880261cd8d8
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15f1427000 CR3: 00000000519fa000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x1b7/0x5d0 kernel/time/hrtimer.c:1766
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 do_softirq+0x161/0x240 kernel/softirq.c:459
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1b0/0x1f0 kernel/softirq.c:383
 update_defense_level+0x878/0xc90 net/netfilter/ipvs/ip_vs_ctl.c:211
 defense_work_handler+0x1c/0xd0 net/netfilter/ipvs/ip_vs_ctl.c:236
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>

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