ci2 starts bisection 2023-06-07 00:49:59.248856724 +0000 UTC m=+446422.895764401
bisecting fixing commit since 115472395b0a9ea522ba0e106d6dfd7a73df8ba6
building syzkaller on fbf0499acc828df26995835e51d83c3a0117e716
ensuring issue is reproducible on original commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6
testing commit 115472395b0a9ea522ba0e106d6dfd7a73df8ba6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: e697c0675d50b1752cb1a46ca22c1f779d6ded75110789291e6bdcb965d3be66
run #0: crashed: KASAN: use-after-free Write in pskb_expand_head
run #1: crashed: KASAN: use-after-free Write in pskb_expand_head
run #2: crashed: KASAN: use-after-free Write in pskb_expand_head
run #3: crashed: INFO: rcu detected stall in rtnl_newlink
run #4: crashed: INFO: rcu detected stall in rtnl_newlink
run #5: crashed: INFO: rcu detected stall in rtnl_newlink
run #6: crashed: INFO: rcu detected stall in rtnl_newlink
run #7: crashed: INFO: rcu detected stall in rtnl_newlink
run #8: crashed: INFO: rcu detected stall in rtnl_newlink
run #9: crashed: INFO: rcu detected stall in rtnl_newlink
run #10: crashed: INFO: rcu detected stall in rtnl_newlink
run #11: crashed: INFO: rcu detected stall in rtnl_newlink
run #12: crashed: INFO: rcu detected stall in rtnl_newlink
run #13: crashed: INFO: rcu detected stall in rtnl_newlink
run #14: crashed: INFO: rcu detected stall in rtnl_newlink
run #15: crashed: INFO: rcu detected stall in rtnl_newlink
run #16: crashed: INFO: rcu detected stall in rtnl_newlink
run #17: crashed: INFO: rcu detected stall in rtnl_newlink
run #18: crashed: INFO: rcu detected stall in rtnl_newlink
run #19: crashed: INFO: rcu detected stall in rtnl_newlink
testing current HEAD d7af3e5ba454d007b4939f858739cf1cecdeab46
testing commit d7af3e5ba454d007b4939f858739cf1cecdeab46 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 98bd69ad39b7eeaa43ae25474e92a430dda0a582a964c44f2a49ae88eeb91ba4
run #0: crashed: KASAN: use-after-free Write in pskb_expand_head
run #1: crashed: KASAN: use-after-free Write in pskb_expand_head
run #2: crashed: INFO: rcu detected stall in rtnl_newlink
run #3: crashed: INFO: rcu detected stall in rtnl_newlink
run #4: crashed: INFO: rcu detected stall in rtnl_newlink
run #5: crashed: INFO: rcu detected stall in rtnl_newlink
run #6: crashed: INFO: rcu detected stall in rtnl_newlink
run #7: crashed: INFO: rcu detected stall in rtnl_newlink
run #8: crashed: INFO: rcu detected stall in rtnl_newlink
run #9: crashed: INFO: rcu detected stall in rtnl_newlink
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 32m18.720117943s (build: 21m18.908870993s, test: 9m44.027197548s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 5.15.115
crash: INFO: rcu detected stall in rtnl_newlink
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=c33/1/0x4000000000000000 softirq=5863/5866 fqs=36
(t=10502 jiffies g=5417 q=62)
rcu: rcu_preempt kthread starved for 10431 jiffies! g5417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28448 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0xaf0/0x54c0 kernel/sched/core.c:6372
schedule+0x10a/0x240 kernel/sched/core.c:6455
schedule_timeout+0x11d/0x250 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1959
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2132
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.15.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:kvm_wait+0x98/0x100 arch/x86/kernel/kvm.c:922
Code: fa 83 e2 07 38 d0 7f 04 84 c0 75 63 0f b6 07 40 38 c6 74 35 48 83 c4 10 c3 c3 e8 c3 3e 44 00 66 90 0f 00 2d 8a 90 db 07 fb f4 <48> 83 c4 10 c3 89 74 24 0c 48 89 3c 24 e8 c6 3f 44 00 8b 74 24 0c
RSP: 0018:ffffc90000ce7a10 EFLAGS: 00000256
RAX: 00000000000aa800 RBX: 0000000000000000 RCX: 1ffffffff1f88aba
RDX: 0000000000000000 RSI: ffffffff890b6040 RDI: ffffffff895eae00
RBP: ffff888075a4d328 R08: 0000000000000001 R09: ffffffff8fbebb4f
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffed100eb49a65 R14: 0000000000000001 R15: ffff8880b9d3a880
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f265dff7000 CR3: 000000001d707000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock_bh include/linux/spinlock.h:368 [inline]
batadv_tt_local_commit_changes+0x15/0x30 net/batman-adv/translation-table.c:3718
batadv_iv_ogm_schedule_buff+0xdcc/0x1090 net/batman-adv/bat_iv_ogm.c:812
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x59f/0x920 net/batman-adv/bat_iv_ogm.c:1713
process_one_work+0x85b/0x1360 kernel/workqueue.c:2307
worker_thread+0x5a6/0xf90 kernel/workqueue.c:2454
kthread+0x38b/0x460 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
NMI backtrace for cpu 0
CPU: 0 PID: 3954 Comm: syz-executor.0 Not tainted 5.15.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x18f/0x1d0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3888 [inline]
rcu_sched_clock_irq.cold+0x402/0x755 kernel/rcu/tree.c:2606
update_process_times+0x13b/0x1c0 kernel/time/timer.c:1788
tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1430
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x18a/0x960 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x2f5/0x780 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x146/0x430 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x4e0 kernel/locking/lockdep.c:5590
Code: 1d ae 7e 83 f8 01 0f 85 79 02 00 00 9c 58 f6 c4 02 0f 85 8c 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900029eef50 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200053ddec RCX: ffffffff8154084c
RDX: 1ffff1100471c15d RSI: ffffffff890b63a0 RDI: ffffffff895eae00
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fbebb47
R10: fffffbfff1f7d768 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888074ddc098 R15: 0000000000000000
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:368 [inline]
batadv_tt_local_purge+0xfb/0x310 net/batman-adv/translation-table.c:1355
batadv_tt_local_resize_to_mtu+0x78/0xe0 net/batman-adv/translation-table.c:3957
batadv_hardif_activate_interface.part.0.cold+0x141/0x1b4 net/batman-adv/hard-interface.c:662
batadv_hardif_activate_interface net/batman-adv/hard-interface.c:753 [inline]
batadv_hardif_enable_interface+0x93f/0x9b0 net/batman-adv/hard-interface.c:745
batadv_softif_slave_add+0x48/0xc0 net/batman-adv/soft-interface.c:839
__rtnl_newlink+0xee9/0x13a0 net/core/rtnetlink.c:3479
rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3510
rtnetlink_rcv_msg+0x31d/0x920 net/core/rtnetlink.c:5587
netlink_rcv_skb+0x118/0x340 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
netlink_unicast+0x430/0x700 net/netlink/af_netlink.c:1356
netlink_sendmsg+0x779/0xc20 net/netlink/af_netlink.c:1923
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xab/0xe0 net/socket.c:724
____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2412
___sys_sendmsg+0xd3/0x150 net/socket.c:2466
__sys_sendmsg+0xb2/0x140 net/socket.c:2495
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f265dedb0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f265d24d168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f265dffaf80 RCX: 00007f265dedb0f9
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f265df36b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff3e5c54bf R14: 00007f265d24d300 R15: 0000000000022000