syzbot

IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
INFO: task syz-executor.2:17908 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D28592 17908   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f3ee7072279
Code: Bad RIP value.
RSP: 002b:00007f3ee67e7168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3ee7184f80 RCX: 00007f3ee7072279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3ee70cc189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea64f6f5f R14: 00007f3ee67e7300 R15: 0000000000022000
INFO: task syz-executor.5:17915 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28592 17915   8132 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f4f794b7279
Code: Bad RIP value.
RSP: 002b:00007f4f78c2c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f4f795c9f80 RCX: 00007f4f794b7279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4f79511189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc9a60fabf R14: 00007f4f78c2c300 R15: 0000000000022000
INFO: task syz-executor.0:17918 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28592 17918   8127 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f84c7887279
Code: Bad RIP value.
RSP: 002b:00007f84c6ffc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f84c7999f80 RCX: 00007f84c7887279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f84c78e1189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeef4879ef R14: 00007f84c6ffc300 R15: 0000000000022000
INFO: task syz-executor.4:17920 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28632 17920   8120 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f9f05dd3279
Code: Bad RIP value.
RSP: 002b:00007f9f05548168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f9f05ee5f80 RCX: 00007f9f05dd3279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f9f05e2d189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd9300d86f R14: 00007f9f05548300 R15: 0000000000022000
INFO: task syz-executor.1:17926 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28592 17926   8130 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f6d4f247279
Code: Bad RIP value.
RSP: 002b:00007f6d4e9bc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f6d4f359f80 RCX: 00007f6d4f247279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f6d4f2a1189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd63e8056f R14: 00007f6d4e9bc300 R15: 0000000000022000
INFO: task syz-executor.3:17927 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28592 17927   8133 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 ksys_sync+0x86/0x150 fs/sync.c:113
 __ia32_sys_sync+0xa/0x10 fs/sync.c:124
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fd18af9e279
Code: Bad RIP value.
RSP: 002b:00007fd18a713168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fd18b0b0f80 RCX: 00007fd18af9e279
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fd18aff8189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd43e2ffcf R14: 00007fd18a713300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/1570:
 #0: 00000000135b12ad (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7830:
1 lock held by syz-executor.2/17908:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.2/17916:
 #0: 00000000d378e361 (&type->s_umount_key#62/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 00000000d378e361 (&type->s_umount_key#62/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
1 lock held by syz-executor.5/17915:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.0/17918:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.4/17920:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.1/17926:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.3/17927:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.2/19361:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.5/19367:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.1/19377:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.3/19435:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.0/19449:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.4/19450:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.1/20860:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.5/20885:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.0/20907:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.2/20956:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.4/20975:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631
1 lock held by syz-executor.3/20978:
 #0: 00000000d378e361 (&type->s_umount_key#63){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8813 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:__lock_acquire+0x82/0x3ff0 kernel/locking/lockdep.c:3275
Code: 25 c0 df 01 00 48 89 04 24 48 8d 84 24 98 00 00 00 48 c1 e8 03 48 89 44 24 08 48 01 d0 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 <c7> 40 08 00 00 00 f2 c7 40 0c f2 f2 f2 f2 c7 40 18 f3 f3 f3 f3 65
RSP: 0018:ffff88809faff978 EFLAGS: 00000086
RAX: ffffed1013f5ff42 RBX: 0000000000000000 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff89f85fa0
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880aa9643c0 R14: ffffffff89f85fa0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf52bf6000 CR3: 00000000a0db2000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:627 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:942 [inline]
 batadv_iv_ogm_schedule_buff+0x5bb/0x1340 net/batman-adv/bat_iv_ogm.c:1008
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1052 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1045 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x68c/0x7a0 net/batman-adv/bat_iv_ogm.c:1871
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415