syzbot


BUG: soft lockup in mld_ifc_work (2)

Status: fixed on 2024/08/06 11:02
Subsystems: wireless
[Documentation on labels]
Fix commit: d1cba2ea8121 wifi: cfg80211: restrict NL80211_ATTR_TXQ_QUANTUM values
First crash: 131d, last: 119d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 BUG: soft lockup in mld_ifc_work 1 109d 109d 0/2 auto-obsoleted due to no activity on 2024/08/19 06:49
linux-6.1 BUG: soft lockup in mld_ifc_work 1 458d 458d 0/3 auto-obsoleted due to no activity on 2023/09/15 05:45
linux-5.15 BUG: soft lockup in mld_ifc_work 1 415d 415d 0/3 auto-obsoleted due to no activity on 2023/10/28 19:55
upstream BUG: soft lockup in mld_ifc_work net 6 412d 387d 0/27 auto-obsoleted due to no activity on 2023/10/31 17:53
upstream INFO: rcu detected stall in mld_ifc_work net C inconclusive 1 937d 937d 22/27 fixed on 2023/02/24 13:50
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/05/25 12:36 18m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2024/05/14 11:00 26m edumazet@google.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24]
Modules linked in:
irq event stamp: 131135
hardirqs last  enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]
hardirqs last  enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95
hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551
softirqs last  enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline]
softirqs last  enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553
softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: mld mld_ifc_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_del include/linux/list.h:195 [inline]
pc : __list_del_entry include/linux/list.h:218 [inline]
pc : list_move_tail include/linux/list.h:310 [inline]
pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline]
pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854
lr : __list_del_entry include/linux/list.h:218 [inline]
lr : list_move_tail include/linux/list.h:310 [inline]
lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline]
lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854
sp : ffff800093d36700
x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000
x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0
x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0
x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0
x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8
x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc
x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470
Call trace:
 __list_del include/linux/list.h:195 [inline]
 __list_del_entry include/linux/list.h:218 [inline]
 list_move_tail include/linux/list.h:310 [inline]
 fq_tin_dequeue include/net/fq_impl.h:112 [inline]
 ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854
 wake_tx_push_queue net/mac80211/util.c:294 [inline]
 ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315
 drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline]
 schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline]
 ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664
 ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966
 ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062
 __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338
 ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532
 __netdev_start_xmit include/linux/netdevice.h:4903 [inline]
 netdev_start_xmit include/linux/netdevice.h:4917 [inline]
 xmit_one net/core/dev.c:3531 [inline]
 dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547
 __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341
 dev_queue_xmit include/linux/netdevice.h:3091 [inline]
 neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314
 mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818
 mld_send_cr net/ipv6/mcast.c:2119 [inline]
 mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3429
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/11 08:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fda5695d692c 9026e142 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: soft lockup in mld_ifc_work
2024/04/29 06:39 upstream e67572cd2204 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root BUG: soft lockup in mld_ifc_work
* Struck through repros no longer work on HEAD.