pkg/report: regenerate test with tail reports and ContextIDs

Author: tarasmadan

pkg/report/testdata/gvisor/report/0

@@ -81,6 +81,50 @@ REPORT:
 panic: runtime error: invalid memory address or nil pointer dereference
 [signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x811ac1]
 
+goroutine 9707990 [running]:
+panic(0xaddd00, 0x10d2b90)
+	GOROOT/src/runtime/panic.go:551 +0x3c1 fp=0xc4205d15b0 sp=0xc4205d1510 pc=0x428fa1
+runtime.panicmem()
+	GOROOT/src/runtime/panic.go:63 +0x5e fp=0xc4205d15d0 sp=0xc4205d15b0 pc=0x427e7e
+runtime.sigpanic()
+	GOROOT/src/runtime/signal_unix.go:388 +0x17a fp=0xc4205d1620 sp=0xc4205d15d0 pc=0x43e59a
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*handleReadWriter).WriteFromBlocks(0xc420ef06e0, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/gofer/handles.go:133 +0x41 fp=0xc4205d1698 sp=0xc4205d1620 pc=0x811ac1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*inodeFileState).WriteFromBlocksAt(0xc4204e24d0, 0xc94d20, 0xc4203fdcc8, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x200, 0x0, 0x0, ...)
+	pkg/sentry/fs/gofer/inode.go:204 +0xfe fp=0xc4205d1710 sp=0xc4205d1698 pc=0x81239e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*inodeReadWriter).WriteFromBlocks(0xc421cdcf40, 0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x0, 0x0, 0x0)
+	pkg/sentry/fs/fsutil/inode_cached.go:605 +0x35d fp=0xc4205d1848 sp=0xc4205d1710 pc=0x660f8d
+gvisor.googlesource.com/gvisor/pkg/sentry/safemem.(Writer).WriteFromBlocks-fm(0x7fe2a3453200, 0xffffffffffffffff, 0x0, 0x61, 0x20000261, 0x7fe2a3453200, 0xffffffffffffffff)
+	pkg/sentry/mm/io.go:309 +0x57 fp=0xc4205d1898 sp=0xc4205d1848 pc=0x6bacd7
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x20000200, 0x20000261, 0x1, 0xc420ef0b40, 0x10fd8e0, 0x6e5a33137f9f62, 0xc420ef0a88)
+	pkg/sentry/mm/io.go:464 +0x72c fp=0xc4205d1998 sp=0xc4205d1898 pc=0x694c4c
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withVecInternalMappings(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc400000001, 0xc420ef0b40, 0x1538c53a716d7b9c, ...)
+	pkg/sentry/mm/io.go:533 +0x7f1 fp=0xc4205d1a90 sp=0xc4205d1998 pc=0x6954c1
+gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyInTo(0xc4214a6580, 0xc94d20, 0xc4203fdcc8, 0x0, 0x1, 0x20000200, 0x61, 0xc87960, 0xc421cdcf40, 0x0, ...)
+	pkg/sentry/mm/io.go:309 +0x17c fp=0xc4205d1b68 sp=0xc4205d1a90 pc=0x69370c
+gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyInTo(0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, 0xc94d20, 0xc4203fdcc8, 0xc87960, ...)
+	pkg/sentry/usermem/usermem.go:528 +0xad fp=0xc4205d1be0 sp=0xc4205d1b68 pc=0x590a4d
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil.(*CachingInodeOperations).Write(0xc4202ed800, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/fsutil/inode_cached.go:474 +0x19e fp=0xc4205d1ca0 sp=0xc4205d1be0 pc=0x66037e
+gvisor.googlesource.com/gvisor/pkg/sentry/fs/gofer.(*fileOperations).Write(0xc421fcd1d0, 0xc94d20, 0xc4203fdcc8, 0xc4205e9000, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/gofer/file.go:192 +0x271 fp=0xc4205d1d78 sp=0xc4205d1ca0 pc=0x80dbf1
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*overlayFileOperations).Write(0xc421fcd200, 0xc94d20, 0xc4203fdcc8, 0xc4205e9080, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/fs/file_overlay.go:222 +0x9b fp=0xc4205d1e00 sp=0xc4205d1d78 pc=0x61d95b
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Pwritev(0xc4205e9080, 0xc94d20, 0xc4203fdcc8, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, 0x0, ...)
+	pkg/sentry/fs/file.go:269 +0x1c2 fp=0xc4205d1ea8 sp=0xc4205d1e00 pc=0x61b532
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.performCallback(0xc421b91b00, 0xc4205e9080, 0x20000280, 0xc4204a8a80, 0xc93580, 0xc4214a6580, 0x0, 0x1, 0x20000200, 0x61, ...)
+	pkg/sentry/syscalls/linux/sys_aio.go:264 +0x2a4 fp=0xc4205d1f38 sp=0xc4205d1ea8 pc=0x8c2144
+gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.submitCallback.func1()
+	pkg/sentry/syscalls/linux/sys_aio.go:342 +0x7c fp=0xc4205d1fb0 sp=0xc4205d1f38 pc=0x8ef8bc
+gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async.func1(0xc420172b60)
+	pkg/sentry/fs/fs.go:82 +0x4f fp=0xc4205d1fd8 sp=0xc4205d1fb0 pc=0x63408f
+runtime.goexit()
+	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4205d1fe0 sp=0xc4205d1fd8 pc=0x455f11
+created by gvisor.googlesource.com/gvisor/pkg/sentry/fs.Async
+	pkg/sentry/fs/fs.go:80 +0x58
+TAIL REPORTS:
+[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x811ac1]
+
 goroutine 9707990 [running]:
 panic(0xaddd00, 0x10d2b90)
 	GOROOT/src/runtime/panic.go:551 +0x3c1 fp=0xc4205d15b0 sp=0xc4205d1510 pc=0x428fa1

pkg/report/testdata/gvisor/report/7

@@ -167,3 +167,13 @@ Previous write at 0x00c4211413e0 by goroutine 45:
       pkg/sentry/kernel/task_run.go:217 +0x157c
   gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
       pkg/sentry/kernel/task_run.go:95 +0x264
+TAIL REPORTS:
+W0618 15:50:34.276259  112427 x:0] FATAL ERROR: error running container: err waiting on container "syz-1": EOF
+error running container: err waiting on container "syz-1": EOF
+W0618 15:50:34.276259  112492 x:0] FATAL ERROR: error getting processes for container: error executing in sandbox: EOF
+error getting processes for container: error executing in sandbox: EOF
+
+<<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>
+W0618 15:50:34.276259  112492 x:0] FATAL ERROR: error getting processes for container: error executing in sandbox: EOF
+error getting processes for container: error executing in sandbox: EOF
+

pkg/report/testdata/linux/report/345

@@ -83,3 +83,35 @@ Dumping ftrace buffer:
    (ftrace buffer empty)
 Kernel Offset: disabled
 Rebooting in 86400 seconds..
+TAIL REPORTS:
+Kernel panic - not syncing: panic_on_warn set ...
+CPU: 2 PID: 1194 Comm: kworker/u12:4 Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Workqueue: netns cleanup_net
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ panic+0x2cb/0x65c
+ __warn.cold+0x20/0x48
+ report_bug+0x263/0x2b0
+ do_error_trap+0x11b/0x200
+ do_invalid_op+0x37/0x50
+ invalid_op+0x14/0x20
+RIP: 0010:xfrm_state_fini+0x440/0x5c0
+Code: c3 e8 d4 94 be fa 0f 0b e9 d5 fd ff ff e8 c8 94 be fa 0f 0b e9 9d fe ff ff e8 bc 94 be fa 0f 0b e9 65 ff ff ff e8 b0 94 be fa <0f> 0b e9 d1 fc ff ff e8 94 87 02 fb e9 f4 fc ff ff 48 89 85 08 ff
+RSP: 0018:ffff888068c37718 EFLAGS: 00010293
+RAX: ffff888068c28300 RBX: ffff88805fec4340 RCX: 0000000000000000
+RDX: 0000000000000000 RSI: ffffffff86c36c50 RDI: 1ffff1100d186ee9
+RBP: ffff888068c37810 R08: 0000000000000007 R09: ffff888068c28bf0
+R10: ffff888068c28300 R11: 0000000000000000 R12: 1ffff1100d186ee5
+R13: ffff888068c377e8 R14: ffff88805fec5e40 R15: ffff88801f9cb0e0
+ xfrm_net_exit+0x25/0x70
+ ops_exit_list.isra.0+0xb0/0x160
+ cleanup_net+0x51d/0xb10
+ process_one_work+0xd0c/0x1ce0
+ worker_thread+0x143/0x14a0
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Dumping ftrace buffer:
+   (ftrace buffer empty)
+Kernel Offset: disabled
+Rebooting in 86400 seconds..

pkg/report/testdata/linux/report/346

@@ -99,3 +99,63 @@ Dumping ftrace buffer:
    (ftrace buffer empty)
 Kernel Offset: disabled
 Rebooting in 86400 seconds..
+TAIL REPORTS:
+INFO: rcu_sched detected stalls on CPUs/tasks:
+ 	(detected by 1, t=105002 jiffies, g=687946, c=687945, q=520)
+ All QSes seen, last rcu_sched kthread activity 103964 (4298143477-4298039513), jiffies_till_next_fqs=3, root ->qsmask 0x0
+ syz-executor0   R running task on cpu   1     0 315571 315308 0x0000000e 3375506638533
+ Call Trace:
+  <IRQ>  [<ffffffff816efb87>] _sched_show_task+0x31a/0x325
+  [<ffffffff816f030c>] sched_show_task+0x10/0x12
+  [<ffffffff816fabed>] rcu_check_callbacks.cold.76+0xbfa/0xc77
+  [<ffffffff814f5cdf>] update_process_times+0x3f/0x70
+  [<ffffffff8151f1ea>] tick_sched_handle.isra.16+0x5a/0x100
+  [<ffffffff8151f89a>] tick_sched_timer+0x7a/0x130
+  [<ffffffff814f8e15>] __hrtimer_run_queues+0x3a5/0xc50
+  [<ffffffff814fa03e>] hrtimer_interrupt+0x18e/0x400
+  [<ffffffff8129a744>] local_apic_timer_interrupt+0x74/0x90
+  [<ffffffff81012dff>] smp_apic_timer_interrupt+0xdf/0x130
+  [<ffffffff81011c72>] smp_apic_timer_interrupt_entry_after_kaiser_bti+0x20/0x2e
+  <EOI>  [<ffffffff815bcdb1>] ? __sanitizer_cov_trace_pc+0x21/0x60
+  [<ffffffff8152dedc>] smp_call_function_single+0x26c/0x330
+  [<ffffffff8152eaa5>] smp_cfm_core+0x6a5/0x7e0
+  [<ffffffff8152ee6b>] on_each_cpu+0x6b/0x120
+  [<ffffffff812dd836>] flush_tlb_kernel_range+0x86/0xe0
+  [<ffffffff817ea3cc>] __purge_vmap_area_lazy+0x3ec/0xf40
+  [<ffffffff817eb5df>] free_vmap_area_noflush+0x1bf/0x200
+  [<ffffffff817ee77e>] remove_vm_area+0x13e/0x1c0
+  [<ffffffff817ee849>] __vunmap+0x49/0x330
+  [<ffffffff817eebf5>] vfree+0x55/0xe0
+  [<ffffffff8177bc6b>] kvfree+0x3b/0x60
+  [<ffffffff82430b98>] uhaul_rx_release+0x268/0x5a0
+<<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>
+Kernel panic - not syncing: panic_on_warn set ...
+CPU: 2 PID: 1194 Comm: kworker/u12:4 Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Workqueue: netns cleanup_net
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ panic+0x2cb/0x65c
+ __warn.cold+0x20/0x48
+ report_bug+0x263/0x2b0
+ do_error_trap+0x11b/0x200
+ do_invalid_op+0x37/0x50
+ invalid_op+0x14/0x20
+RIP: 0010:xfrm_state_fini+0x440/0x5c0
+RSP: 0018:ffff888068c37718 EFLAGS: 00010293
+RAX: ffff888068c28300 RBX: ffff88805fec4340 RCX: 0000000000000000
+RDX: 0000000000000000 RSI: ffffffff86c36c50 RDI: 1ffff1100d186ee9
+RBP: ffff888068c37810 R08: 0000000000000007 R09: ffff888068c28bf0
+R10: ffff888068c28300 R11: 0000000000000000 R12: 1ffff1100d186ee5
+R13: ffff888068c377e8 R14: ffff88805fec5e40 R15: ffff88801f9cb0e0
+ xfrm_net_exit+0x25/0x70
+ ops_exit_list.isra.0+0xb0/0x160
+ cleanup_net+0x51d/0xb10
+ process_one_work+0xd0c/0x1ce0
+ worker_thread+0x143/0x14a0
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Dumping ftrace buffer:
+   (ftrace buffer empty)
+Kernel Offset: disabled
+Rebooting in 86400 seconds..

pkg/report/testdata/linux/report/347

@@ -107,3 +107,30 @@ Dumping ftrace buffer:
    (ftrace buffer empty)
 Kernel Offset: disabled
 Rebooting in 86400 seconds..
+TAIL REPORTS:
+Kernel panic - not syncing: panic_on_warn set ...
+CPU: 2 PID: 1194 Comm: kworker/u12:4 Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Workqueue: netns cleanup_net
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ do_invalid_op+0x37/0x50
+ invalid_op+0x14/0x20
+RIP: 0010:xfrm_state_fini+0x440/0x5c0
+RSP: 0018:ffff888068c37718 EFLAGS: 00010293
+RAX: ffff888068c28300 RBX: ffff88805fec4340 RCX: 0000000000000000
+RDX: 0000000000000000 RSI: ffffffff86c36c50 RDI: 1ffff1100d186ee9
+RBP: ffff888068c37810 R08: 0000000000000007 R09: ffff888068c28bf0
+R10: ffff888068c28300 R11: 0000000000000000 R12: 1ffff1100d186ee5
+R13: ffff888068c377e8 R14: ffff88805fec5e40 R15: ffff88801f9cb0e0
+ xfrm_net_exit+0x25/0x70
+ ops_exit_list.isra.0+0xb0/0x160
+ cleanup_net+0x51d/0xb10
+ process_one_work+0xd0c/0x1ce0
+ worker_thread+0x143/0x14a0
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Dumping ftrace buffer:
+   (ftrace buffer empty)
+Kernel Offset: disabled
+Rebooting in 86400 seconds..

pkg/report/testdata/linux/report/348

@@ -87,3 +87,30 @@ Dumping ftrace buffer:
    (ftrace buffer empty)
 Kernel Offset: disabled
 Rebooting in 86400 seconds..
+TAIL REPORTS:
+Kernel panic - not syncing: panic_on_warn set ...
+CPU: 2 PID: 1194 Comm: kworker/u12:4 Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Workqueue: netns cleanup_net
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ do_invalid_op+0x37/0x50
+ invalid_op+0x14/0x20
+RIP: 0010:xfrm_state_fini+0x440/0x5c0
+RSP: 0018:ffff888068c37718 EFLAGS: 00010293
+RAX: ffff888068c28300 RBX: ffff88805fec4340 RCX: 0000000000000000
+RDX: 0000000000000000 RSI: ffffffff86c36c50 RDI: 1ffff1100d186ee9
+RBP: ffff888068c37810 R08: 0000000000000007 R09: ffff888068c28bf0
+R10: ffff888068c28300 R11: 0000000000000000 R12: 1ffff1100d186ee5
+R13: ffff888068c377e8 R14: ffff88805fec5e40 R15: ffff88801f9cb0e0
+ xfrm_net_exit+0x25/0x70
+ ops_exit_list.isra.0+0xb0/0x160
+ cleanup_net+0x51d/0xb10
+ process_one_work+0xd0c/0x1ce0
+ worker_thread+0x143/0x14a0
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Dumping ftrace buffer:
+   (ftrace buffer empty)
+Kernel Offset: disabled
+Rebooting in 86400 seconds..

pkg/report/testdata/linux/report/349

@@ -222,6 +222,22 @@ INFO: task jbd2/sda-8:3563 blocked for more than 140 seconds.
       Not tainted 4.20.0-next-20190102+ #5
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 jbd2/sda-8      D22600  3563      2 0x80000000
+Call Trace:
+ __schedule+0x897/0x1e60
+ schedule+0xfe/0x350
+ io_schedule+0x1c/0x70
+ bit_wait_io+0x17/0x90
+ __wait_on_bit+0xb3/0x130
+ out_of_line_wait_on_bit+0x1f4/0x3b0
+ __wait_on_buffer+0x6f/0x90
+ jbd2_journal_commit_transaction+0x658a/0x8ee4
+ kjournald2+0x20f/0xb90
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+TAIL REPORTS:
+      Not tainted 4.20.0-next-20190102+ #5
+"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
+jbd2/sda-8      D22600  3563      2 0x80000000
 Call Trace:
  __schedule+0x897/0x1e60
  schedule+0xfe/0x350
@@ -239,6 +255,33 @@ INFO: task kworker/u12:5:1980 blocked for more than 140 seconds.
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 kworker/u12:5   D21864  1980      2 0x80000000
 Workqueue: writeback wb_workfn (flush-8:0)
+Call Trace:
+ __schedule+0x897/0x1e60
+ schedule+0xfe/0x350
+ io_schedule+0x1c/0x70
+ rq_qos_wait+0x2f2/0x600
+ wbt_wait+0x266/0x430
+ __rq_qos_throttle+0x58/0xb0
+ blk_mq_make_request+0x424/0x1e10
+ generic_make_request+0x902/0x17f0
+ submit_bio+0xba/0x480
+ ext4_io_submit+0x197/0x230
+ ext4_writepages+0x139d/0x4180
+ do_writepages+0x99/0x1a0
+ __writeback_single_inode+0x1c5/0x1620
+ writeback_sb_inodes+0x762/0x1260
+ __writeback_inodes_wb+0x16d/0x3d0
+ wb_writeback+0xa2d/0xf70
+ wb_workfn+0xccc/0x16f0
+ process_one_work+0xd0c/0x1ce0
+ worker_thread+0x143/0x14a0
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+<<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>
+      Not tainted 4.20.0-next-20190102+ #5
+"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
+kworker/u12:5   D21864  1980      2 0x80000000
+Workqueue: writeback wb_workfn (flush-8:0)
 Call Trace:
  __schedule+0x897/0x1e60
  schedule+0xfe/0x350
@@ -294,6 +337,39 @@ RDX: 0000000020000040 RSI: 0000000000000005 RDI: 0000000000000005
 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
 R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f66fbce46d4
 R13: 00000000004abcac R14: 00000000006eb9b8 R15: 00000000ffffffff
+<<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>
+      Not tainted 4.20.0-next-20190102+ #5
+"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
+syz-executor2   D19624  6677  22450 0x00000004
+Call Trace:
+ __schedule+0x897/0x1e60
+ schedule+0xfe/0x350
+ io_schedule+0x1c/0x70
+ wait_on_page_bit_common+0xad5/0x1370
+ __filemap_fdatawait_range+0x614/0x890
+ file_write_and_wait_range+0xd1/0x100
+ ext4_sync_file+0x2da/0x14d0
+ vfs_fsync_range+0x144/0x230
+ ext4_file_write_iter+0x683/0x1400
+ do_iter_readv_writev+0x902/0xbc0
+ do_iter_write+0x184/0x610
+ vfs_iter_write+0x77/0xb0
+ iter_file_splice_write+0x885/0xfc0
+ direct_splice_actor+0x126/0x1a0
+ splice_direct_to_actor+0x3be/0x9d0
+ do_splice_direct+0x2c7/0x420
+ do_sendfile+0x61a/0xe60
+ __x64_sys_sendfile64+0x15a/0x240
+ do_syscall_64+0x1a3/0x800
+ entry_SYSCALL_64_after_hwframe+0x49/0xbe
+RIP: 0033:0x4576a9
+Code: 3b 41 10 76 7d 48 81 ec 88 00 00 00 48 89 ac 24 80 00 00 00 48 8d ac 24 80 00 00 00 48 8b 59 20 48 85 db 75 67 48 8b b4 24 a0 <00> 00 00 8b 8c 24 a8 00 00 00 48 89 e7 f3 a4 48 8b 94 24 98 00 00
+RSP: 002b:00007f66fbce3c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
+RAX: ffffffffffffffda RBX: 000000000071bf00 RCX: 00000000004576a9
+RDX: 0000000020000040 RSI: 0000000000000005 RDI: 0000000000000005
+RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
+R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f66fbce46d4
+R13: 00000000004abcac R14: 00000000006eb9b8 R15: 00000000ffffffff
 INFO: task syz-executor2:6693 blocked for more than 140 seconds.
       Not tainted 4.20.0-next-20190102+ #5
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
@@ -419,3 +495,67 @@ RDX: 0000000000000400 RSI: 00000000008d3ce0 RDI: 0000000000000002
 RBP: 00000000008d3ce0 R08: 00000000008d408d R09: 00007fc30b3ffe07
 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
 R13: 00007fc30a024410 R14: 00007fc304002a50 R15: 00000000008d3ac0
+<<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>
+R10: 0001000000020000 R11: 0000000000000246 R12: 00007f66fbcc36d4
+R13: 00000000004abcac R14: 00000000006eb9b8 R15: 00000000ffffffff
+Showing all locks held in the system:
+1 lock held by khungtaskd/1054:
+ #0: 00000000c542499d (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d
+1 lock held by rsyslogd/5859:
+ #0: 00000000567e80cf (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0
+2 locks held by getty/5951:
+ #0: 000000003b0dfac2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000281ebc43 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5952:
+ #0: 00000000f0d48c91 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000cff3c1fb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5953:
+ #0: 00000000cb353a8f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000373ded25 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5954:
+ #0: 000000005c8be537 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000d7aec815 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5955:
+ #0: 00000000eda8138a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000f4fd60a6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5956:
+ #0: 000000000745b5fb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 00000000a4c3442a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+2 locks held by getty/5957:
+ #0: 000000002cb7c49e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40
+ #1: 000000009258e26f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0
+4 locks held by kworker/u12:5/1980:
+ #0: 000000005e902bc8 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xbc7/0x1ce0
+ #1: 0000000056cd520a ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xc1d/0x1ce0
+ #2: 00000000146ba37b (&type->s_umount_key#30){++++}, at: trylock_super+0x22/0x110
+ #3: 00000000fec9c2c2 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0x99/0x1a0
+1 lock held by syz-executor2/6677:
+ #0: 000000007b67e744 (sb_writers#3){.+.+}, at: do_sendfile+0xad7/0xe60
+1 lock held by syz-executor2/6693:
+ #0: 000000007b67e744 (sb_writers#3){.+.+}, at: do_sendfile+0xad7/0xe60
+=============================================
+NMI backtrace for cpu 3
+CPU: 3 PID: 1054 Comm: khungtaskd Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ nmi_cpu_backtrace.cold+0x63/0xa4
+ nmi_trigger_cpumask_backtrace+0x1be/0x236
+ arch_trigger_cpumask_backtrace+0x14/0x20
+ watchdog+0xbbb/0x1170
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Sending NMI from CPU 3 to CPUs 0-2:
+Kernel panic - not syncing: hung_task: blocked tasks
+CPU: 3 PID: 1054 Comm: khungtaskd Not tainted 4.20.0-next-20190102+ #5
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
+Call Trace:
+ dump_stack+0x1db/0x2d0
+ panic+0x2cb/0x65c
+ watchdog+0xbcc/0x1170
+ kthread+0x357/0x430
+ ret_from_fork+0x3a/0x50
+Dumping ftrace buffer:
+   (ftrace buffer empty)
+Kernel Offset: disabled
+Rebooting in 86400 seconds..