INFO: task syz-executor.5:7602 blocked for more than 143 seconds.
Not tainted 5.7.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D24216 7602 1 0x00000004
Call Trace:
schedule+0xd0/0x2a0 kernel/sched/core.c:4163
rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
inode_lock include/linux/fs.h:797 [inline]
vfs_unlink+0xcd/0x640 fs/namei.c:3800
do_unlinkat+0x3c4/0x680 fs/namei.c:3873
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c5d7
Code: Bad RIP value.
RSP: 002b:00007ffd20992128 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c5d7
RDX: 00007ffd20992140 RSI: 00007ffd20992140 RDI: 00007ffd209921d0
RBP: 000000000000000d R08: 0000000000000000 R09: 0000000000000011
R10: 000000000000000d R11: 0000000000000246 R12: 00007ffd20993260
R13: 000000000100c940 R14: 0000000000000000 R15: 00007ffd20993260
Showing all locks held in the system:
3 locks held by kworker/u4:2/55:
#0: ffff8880ae637998 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x9d9/0xdd0 kernel/sched/fair.c:10512
#1: ffffffff899bed00 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x42/0x3e0 kernel/sched/fair.c:5969
#2: ffff8880ae627598 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x55/0x1a0 kernel/time/timer.c:936
1 lock held by khungtaskd/1135:
#0: ffffffff899bed00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754
1 lock held by in:imklog/6726:
#0: ffff8880a32fa3f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826
3 locks held by syz-executor.5/7602:
#0: ffff8882144a4450 (sb_writers#3){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1655 [inline]
#0: ffff8882144a4450 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:354
#1: ffff888047d823c8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:832 [inline]
#1: ffff888047d823c8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27d/0x680 fs/namei.c:3859
#2: ffff888047d88508 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline]
#2: ffff888047d88508 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: vfs_unlink+0xcd/0x640 fs/namei.c:3800
3 locks held by syz-executor.5/8506:
#0: ffff88809f209bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826
#1: ffff8882144a4450 (sb_writers#3){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2908 [inline]
#1: ffff8882144a4450 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x4cf/0x5d0 fs/read_write.c:558
#2: ffff888047d88508 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline]
#2: ffff888047d88508 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb3/0x450 fs/ext4/file.c:264
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1135 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xa8c/0x1010 kernel/hung_task.c:289
kthread+0x388/0x470 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3428 Comm: kworker/0:4 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__orc_find+0x58/0xf0 arch/x86/kernel/unwind_orc.c:47
Code: 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e2 48 29 ea 48 89 d0 48 c1 ea 3f 48 c1 f8 02 <48> 01 c2 48 d1 fa 48 8d 5c 95 00 48 89 d8 48 c1 e8 03 42 0f b6 14
RSP: 0018:ffffc9000a5df6f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8a98cac0 RCX: ffffffff81625bbb
RDX: 0000000000000000 RSI: ffffffff8af42828 RDI: ffffffff8a98cab4
RBP: ffffffff8a98cac4 R08: 00000000000168c8 R09: ffffffff8af4286a
R10: 00000000000168be R11: 000000000007001f R12: ffffffff8a98cac4
R13: ffffffff8a98cab4 R14: ffffffff8a98cac0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a52300000 CR3: 0000000090dc7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:173 [inline]
unwind_next_frame+0x34b/0x19d0 arch/x86/kernel/unwind_orc.c:407
arch_stack_walk+0x74/0xd0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
save_stack+0x1b/0x40 mm/kasan/common.c:49
set_track mm/kasan/common.c:57 [inline]
__kasan_kmalloc mm/kasan/common.c:495 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468
__kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:142
__alloc_skb+0xef/0x5a0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1083 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:492 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:549 [inline]
nsim_dev_trap_report_work+0x2bb/0xbc0 drivers/net/netdevsim/dev.c:590
process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
worker_thread+0x96/0xe20 kernel/workqueue.c:2414
kthread+0x388/0x470 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352