bisecting cause commit starting from a1ec57c020201ba29608a5a3588832d07de1a518
building syzkaller on 36650b4b2c942bc382314dce384d311fbadd1208
testing commit a1ec57c020201ba29608a5a3588832d07de1a518 with gcc (GCC) 8.1.0
kernel signature: 7cac10c2b20d2f2f37691b640f14ef7bbd86b397
all runs: crashed: INFO: rcu detected stall in br_handle_frame
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0
kernel signature: 69d413dade0ec037a9ddc95ba2fd9877190609b0
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in br_handle_frame
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in netlink_sendmsg
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
kernel signature: 9f7f462a7a9db6d1bdf6603632e442617468baf5
all runs: crashed: INFO: rcu detected stall in br_handle_frame
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0
kernel signature: a0cc4295bfc05feb029acd092d2cddf39df12a57
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in br_handle_frame
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0
kernel signature: 492079ba123c382e44212948ea1652dfb1401598
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in netlink_sendmsg
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in addrconf_dad_work
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in addrconf_dad_work
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0
kernel signature: 55e735d76730a75d7bfaf9340ba83e4497d97780
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in br_handle_frame
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in netlink_sendmsg
run #8: crashed: INFO: rcu detected stall in addrconf_dad_work
run #9: crashed: INFO: rcu detected stall in netlink_sendmsg
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0
kernel signature: f20ef267b8e391b435399a9a252261855b8c84ee
run #0: crashed: INFO: rcu detected stall in addrconf_dad_work
run #1: crashed: INFO: rcu detected stall in addrconf_dad_work
run #2: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #3: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #5: crashed: INFO: rcu detected stall in addrconf_dad_work
run #6: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #7: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #9: crashed: INFO: rcu detected stall in addrconf_rs_timer
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0
kernel signature: fcbda66f6b7828191094673383c49dc787fe9249
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in addrconf_dad_work
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in addrconf_dad_work
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0
kernel signature: 45d4a458671ed28b7ed4871eeee95150c9ae27e0
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in addrconf_dad_work
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in addrconf_dad_work
run #9: crashed: INFO: rcu detected stall in corrupted
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
kernel signature: 0cc33f71d129631ff0aab3cb2980daa81847dad1
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
kernel signature: ef3fa0d866e4c46399002566026b22d1292965a9
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in mld_dad_timer_expire
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in addrconf_dad_work
run #7: crashed: INFO: rcu detected stall in addrconf_dad_work
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
kernel signature: b77bcf5343058785491c0c2c9bf2fa9bfcb833ad
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in br_handle_frame
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in mld_dad_timer_expire
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
kernel signature: 0b2dfd7873720b93984b7e1ee2de03b52efa81bd
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #9: crashed: INFO: rcu detected stall in corrupted
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
kernel signature: 7a4113f488a49a96d443bfc329f243e9bd9ec340
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in addrconf_dad_work
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
kernel signature: eff2ed6cdce3335d77a30475f7625701fbd4a814
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in br_handle_frame
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0
kernel signature: 0a689ebfaa54e90782de313c09b7deb1f9e1d0cb
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in addrconf_dad_work
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0
kernel signature: 919640ecaa6aeb6ec5d773aea4c5019a1df9a662
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in netlink_sendmsg
run #2: crashed: INFO: rcu detected stall in addrconf_dad_work
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in addrconf_dad_work
run #9: crashed: INFO: rcu detected stall in corrupted
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
kernel signature: b9b4cdb2fe50b2e70fe3bf96dc5e555515b62dba
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in addrconf_dad_work
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in corrupted
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
kernel signature: 4b4aa8713e8041e1c1c4e4c6445a17e98facaade
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in br_handle_frame
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in br_handle_frame
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
kernel signature: 19c45fcafef49fc93a33414c16a8f50e65ba6a31
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in br_handle_frame
run #4: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in br_handle_frame
run #9: crashed: INFO: rcu detected stall in br_handle_frame
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
kernel signature: 7f8ed10c05c6e1d89f46c087af8352dd79e38b11
run #0: crashed: INFO: rcu detected stall in br_handle_frame
run #1: crashed: INFO: rcu detected stall in br_handle_frame
run #2: crashed: INFO: rcu detected stall in br_handle_frame
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in br_handle_frame
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
revisions tested: 21, total time: 3h36m31.023756635s (build: 1h44m3.451511373s, test: 1h49m52.434989722s)
the crash already happened on the oldest tested release
commit msg: Linux 4.6
crash: INFO: rcu detected stall in corrupted
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
sch_fq: defrate 0 ignored.
INFO: rcu_preempt self-detected stall on CPU
	0-...: (1 GPs behind) idle=3d3/140000000000002/0 softirq=10460/10461 fqs=33 
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-...: (10500 ticks this GP) idle=3d3/140000000000002/0 softirq=10461/10461 fqs=34 
	(detected by 1, t=10502 jiffies, g=-9, c=-10, q=5)
Task dump for CPU 0:
syz-executor.5  R  running task    24224  7157   7153 0x00000008
 ffff8800b408fca0 ffffffff81a3c225 ffff8801291f3a24 ffff8801290b2e20
 ffff8801291f3a00 ffff8800b408fec0 0000000000000004 ffff8800b408fe30
 ffffffff81a3e32f ffff8800b408fcf8 ffffffff814351b8 0000000000000000
Call Trace:
 [<ffffffff81a3e32f>] ext4_dx_readdir fs/ext4/dir.c:566 [inline]
 [<ffffffff81a3e32f>] ext4_readdir+0x102f/0x2710 fs/ext4/dir.c:121
 [<ffffffff817d4056>] iterate_dir+0x1b6/0x420 fs/readdir.c:42
 [<ffffffff817d4ce3>] SYSC_getdents fs/readdir.c:215 [inline]
 [<ffffffff817d4ce3>] SyS_getdents+0xf3/0x1a0 fs/readdir.c:196
 [<ffffffff85b69f00>] entry_SYSCALL_64_fastpath+0x23/0xc1
rcu_sched kthread starved for 10468 jiffies! g18446744073709551607 c18446744073709551606 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1
rcu_sched       S ffff88012b0afac8 29392     8      2 0x00000000
 ffff88012b0afac8 ffff88012c120400 ffff88012c120d90 ffff88012c120d68
 ffff88012c120418 ffff88012b09a1c8 1ffff10000000000 ffff88012b10a400
 ffff88012b09a1c0 ffff88012b0a8000 ffffed0025615001 ffff88012b0a8008
Call Trace:
 [<ffffffff85b5b35a>] schedule+0x9a/0x1c0 kernel/sched/core.c:3250
 [<ffffffff85b67c85>] schedule_timeout+0x2e5/0x670 kernel/time/timer.c:1531
 [<ffffffff8148e182>] rcu_gp_kthread+0xee2/0x1f70 kernel/rcu/tree.c:2126
 [<ffffffff813a3a09>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85b6a152>] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392
INFO: rcu_preempt detected stalls on CPUs/tasks:
	0-...: (1 GPs behind) idle=3d3/140000000000002/0 softirq=10460/10461 fqs=33 
	(detected by 1, t=10502 jiffies, g=1922, c=1921, q=244)
Task dump for CPU 0:
syz-executor.5  R  running task    24224  7157   7153 0x00000008
 ffff8800b408fca0 ffffffff81a3c225 ffff8801291f3a24 ffff8801290b2e20
 ffff8801291f3a00 ffff8800b408fec0 0000000000000004 ffff8800b408fe30
 ffffffff81a3e32f ffff8800b408fcf8 ffffffff814351b8 0000000000000000
Call Trace:
 [<ffffffff81a3e32f>] ext4_dx_readdir fs/ext4/dir.c:566 [inline]
 [<ffffffff81a3e32f>] ext4_readdir+0x102f/0x2710 fs/ext4/dir.c:121
 [<ffffffff817d4056>] iterate_dir+0x1b6/0x420 fs/readdir.c:42
 [<ffffffff817d4ce3>] SYSC_getdents fs/readdir.c:215 [inline]
 [<ffffffff817d4ce3>] SyS_getdents+0xf3/0x1a0 fs/readdir.c:196
 [<ffffffff85b69f00>] entry_SYSCALL_64_fastpath+0x23/0xc1
rcu_preempt kthread starved for 10469 jiffies! g1922 c1921 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1
rcu_preempt     S ffff88012b0a7ac8 28976     7      2 0x00000000
 ffff88012b0a7ac8 ffff88012c120400 ffff88012c120d90 ffff88012c120d68
 ffff88012c120418 ffff88012b098188 1ffff10000000000 ffff88012b09a1c0
 ffff88012b098180 ffff88012b0a0000 ffffed0025614001 ffff88012b0a0008
Call Trace:
 [<ffffffff85b5b35a>] schedule+0x9a/0x1c0 kernel/sched/core.c:3250
 [<ffffffff85b67c85>] schedule_timeout+0x2e5/0x670 kernel/time/timer.c:1531
 [<ffffffff8148e182>] rcu_gp_kthread+0xee2/0x1f70 kernel/rcu/tree.c:2126
 [<ffffffff813a3a09>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85b6a152>] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392
	 (t=10563 jiffies g=1922 c=1921 q=244)
rcu_preempt kthread starved for 10530 jiffies! g1922 c1921 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0
rcu_preempt     R  running task    28976     7      2 0x00000000
 ffff88012b0a7ac8 ffff88012c120400 ffff88012c120d90 ffff88012c120d68
 ffff88012c120418 ffff88012b098188 1ffff10000000000 ffff88012b09a1c0
 ffff88012b098180 ffff88012b0a0000 ffffed0025614001 ffff88012b0a0008
Call Trace:
 [<ffffffff85b5b35a>] schedule+0x9a/0x1c0 kernel/sched/core.c:3250
 [<ffffffff85b67c85>] schedule_timeout+0x2e5/0x670 kernel/time/timer.c:1531
 [<ffffffff8148e182>] rcu_gp_kthread+0xee2/0x1f70 kernel/rcu/tree.c:2126
 [<ffffffff813a3a09>] kthread+0x209/0x2d0 kernel/kthread.c:209
 [<ffffffff85b6a152>] ret_from_fork+0x22/0x50 arch/x86/entry/entry_64.S:392
Task dump for CPU 0:
syz-executor.5  R  running task    24224  7157   7153 0x00000008
 0000000000001bf1 ffff88012c006700 ffffffff813d414c ffffffff81615a00
 0000000041b58ab3 ffffffff868f20bf ffffffff813d3ec0 ffff88012c0066c0
 ffffffff81483dd4 0000000000000000 ffffffff00000000 ffffffff813d3ec0
Call Trace:
 <IRQ>  [<ffffffff813d414c>] sched_show_task+0x28c/0x400 kernel/sched/core.c:4976
 [<ffffffff813dc121>] dump_cpu_task+0x71/0x90 kernel/sched/core.c:8469
 [<ffffffff81483ee1>] rcu_dump_cpu_stacks+0x191/0x290 kernel/rcu/tree.c:1246
 [<ffffffff814915a1>] print_cpu_stall kernel/rcu/tree.c:1353 [inline]
 [<ffffffff814915a1>] check_cpu_stall kernel/rcu/tree.c:1417 [inline]
 [<ffffffff814915a1>] __rcu_pending kernel/rcu/tree.c:3883 [inline]
 [<ffffffff814915a1>] rcu_pending kernel/rcu/tree.c:3947 [inline]
 [<ffffffff814915a1>] rcu_check_callbacks+0xde1/0x2010 kernel/rcu/tree.c:2772
 [<ffffffff814a3be4>] update_process_times+0x34/0x60 kernel/time/timer.c:1420
 [<ffffffff814cc4d4>] tick_sched_handle.isra.19+0x44/0xe0 kernel/time/tick-sched.c:151
 [<ffffffff814ccc14>] tick_sched_timer+0x64/0xd0 kernel/time/tick-sched.c:1178
 [<ffffffff814a58d4>] __run_hrtimer kernel/time/hrtimer.c:1242 [inline]
 [<ffffffff814a58d4>] __hrtimer_run_queues+0x2d4/0xbf0 kernel/time/hrtimer.c:1306
 [<ffffffff814a7d3d>] hrtimer_interrupt+0x19d/0x470 kernel/time/hrtimer.c:1340
 [<ffffffff812409de>] local_apic_timer_interrupt+0x6e/0xf0 arch/x86/kernel/apic/apic.c:907
 [<ffffffff85b6c836>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:931
 [<ffffffff85b6ab7c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:621
 [<ffffffff849f7d7e>] dequeue_skb net/sched/sch_generic.c:103 [inline]
 [<ffffffff849f7d7e>] qdisc_restart net/sched/sch_generic.c:223 [inline]
 [<ffffffff849f7d7e>] __qdisc_run+0x15e/0x760 net/sched/sch_generic.c:239
 [<ffffffff8494cebe>] __dev_xmit_skb net/core/dev.c:3073 [inline]
 [<ffffffff8494cebe>] __dev_queue_xmit+0xa0e/0x1f40 net/core/dev.c:3326
 [<ffffffff8494e3fb>] dev_queue_xmit+0xb/0x10 net/core/dev.c:3392
 [<ffffffff851955db>] br_dev_queue_push_xmit+0x16b/0x540 net/bridge/br_forward.c:59
 [<ffffffff851d949a>] br_nf_dev_queue_xmit+0x1da/0x1780 net/bridge/br_netfilter_hooks.c:790
 [<ffffffff851db3c1>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff851db3c1>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff851db3c1>] br_nf_post_routing+0x981/0xe30 net/bridge/br_netfilter_hooks.c:836
 [<ffffffff84b0d11e>] nf_iterate+0x13e/0x220 net/netfilter/core.c:274
 [<ffffffff84b0d366>] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306
 [<ffffffff85195ac0>] nf_hook_thresh include/linux/netfilter.h:180 [inline]
 [<ffffffff85195ac0>] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline]
 [<ffffffff85195ac0>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff85195ac0>] br_forward_finish+0x110/0x180 net/bridge/br_forward.c:71
 [<ffffffff851d4a0b>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff851d4a0b>] br_nf_forward_finish+0x1ab/0x960 net/bridge/br_netfilter_hooks.c:566
 [<ffffffff851d6a6c>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff851d6a6c>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff851d6a6c>] br_nf_forward_ip+0x95c/0x1290 net/bridge/br_netfilter_hooks.c:633
 [<ffffffff84b0d11e>] nf_iterate+0x13e/0x220 net/netfilter/core.c:274
 [<ffffffff84b0d366>] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306
 [<ffffffff851966bd>] nf_hook_thresh include/linux/netfilter.h:180 [inline]
 [<ffffffff851966bd>] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline]
 [<ffffffff851966bd>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff851966bd>] __br_forward+0x34d/0x4b0 net/bridge/br_forward.c:123
 [<ffffffff8519541e>] deliver_clone+0x4e/0xa0 net/bridge/br_forward.c:168
 [<ffffffff85195dbc>] br_flood+0x28c/0x350 net/bridge/br_forward.c:227
 [<ffffffff851970f4>] br_flood_forward+0x14/0x20 net/bridge/br_forward.c:248
 [<ffffffff8519adcb>] br_handle_frame_finish+0x79b/0x1e60 net/bridge/br_input.c:202
 [<ffffffff851dd29c>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff851dd29c>] br_nf_pre_routing_finish_ipv6+0x5ec/0xd30 net/bridge/br_netfilter_ipv6.c:210
 [<ffffffff851debfb>] NF_HOOK_THRESH include/linux/netfilter.h:219 [inline]
 [<ffffffff851debfb>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff851debfb>] br_nf_pre_routing_ipv6+0x31b/0x4c0 net/bridge/br_netfilter_ipv6.c:239
 [<ffffffff851dc778>] br_nf_pre_routing+0x9e8/0xf20 net/bridge/br_netfilter_hooks.c:493
 [<ffffffff84b0d11e>] nf_iterate+0x13e/0x220 net/netfilter/core.c:274
 [<ffffffff84b0d366>] nf_hook_slow+0x166/0x290 net/netfilter/core.c:306
 [<ffffffff8519caca>] nf_hook_thresh include/linux/netfilter.h:180 [inline]
 [<ffffffff8519caca>] NF_HOOK_THRESH include/linux/netfilter.h:217 [inline]
 [<ffffffff8519caca>] NF_HOOK include/linux/netfilter.h:242 [inline]
 [<ffffffff8519caca>] br_handle_frame+0x63a/0xf40 net/bridge/br_input.c:311
 [<ffffffff8493eb3f>] __netif_receive_skb_core+0x5bf/0x2d90 net/core/dev.c:4114
 [<ffffffff8494132f>] __netif_receive_skb+0x1f/0x150 net/core/dev.c:4198
 [<ffffffff849416cb>] process_backlog+0x26b/0x790 net/core/dev.c:4783
 [<ffffffff84945d31>] napi_poll net/core/dev.c:5087 [inline]
 [<ffffffff84945d31>] net_rx_action+0x721/0xe70 net/core/dev.c:5152
 [<ffffffff85b6d0ac>] __do_softirq+0x2cc/0xa06 kernel/softirq.c:273
 [<ffffffff81355107>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff81355107>] irq_exit+0x157/0x190 kernel/softirq.c:391
 [<ffffffff85b6c83b>] exiting_irq arch/x86/include/asm/apic.h:658 [inline]
 [<ffffffff85b6c83b>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:932
 [<ffffffff85b6ab7c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:621
 <EOI>  [<ffffffff81205056>] ? save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:67
 [<ffffffff814ed212>] is_module_text_address+0x12/0x50 kernel/module.c:4024
 [<ffffffff8139f131>] __kernel_text_address+0x61/0xa0 kernel/extable.c:103
 [<ffffffff811e569b>] print_context_stack+0x7b/0xc0 arch/x86/kernel/dumpstack.c:107
 [<ffffffff811e49bd>] dump_trace+0x11d/0x320 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff81205056>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:67
 [<ffffffff8173f3e6>] save_stack+0x46/0xd0 mm/kasan/kasan.c:450
 [<ffffffff8173f7a9>] set_track mm/kasan/kasan.c:462 [inline]
 [<ffffffff8173f7a9>] kasan_kmalloc+0xc9/0xe0 mm/kasan/kasan.c:532
 [<ffffffff8173bb09>] __do_kmalloc mm/slab.c:3545 [inline]
 [<ffffffff8173bb09>] __kmalloc+0x169/0x6d0 mm/slab.c:3554
 [<ffffffff81a3fab9>] kmalloc include/linux/slab.h:483 [inline]
 [<ffffffff81a3fab9>] kzalloc include/linux/slab.h:622 [inline]
 [<ffffffff81a3fab9>] ext4_htree_store_dirent+0x89/0x5f0 fs/ext4/dir.c:442
 [<ffffffff81a7c8e2>] htree_dirblock_to_tree+0x402/0x540 fs/ext4/namei.c:1001
 [<ffffffff81a80d16>] ext4_htree_fill_tree+0x1f6/0x870 fs/ext4/namei.c:1075
 [<ffffffff81a3e32f>] ext4_dx_readdir fs/ext4/dir.c:566 [inline]
 [<ffffffff81a3e32f>] ext4_readdir+0x102f/0x2710 fs/ext4/dir.c:121
 [<ffffffff817d4056>] iterate_dir+0x1b6/0x420 fs/readdir.c:42
 [<ffffffff817d4ce3>] SYSC_getdents fs/readdir.c:215 [inline]
 [<ffffffff817d4ce3>] SyS_getdents+0xf3/0x1a0 fs/readdir.c:196
 [<ffffffff85b69f00>] entry_SYSCALL_64_fastpath+0x23/0xc1