INFO: rcu detected stall in ext4_file_read_iter
9 views
Skip to first unread message
syzbot
Nov 1, 2019, 7:29:08 AM11/1/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: ef244c30 Linux 4.19.81
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1799b684e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=a3e67c0671e5c5e7
dashboard link: https://syzkaller.appspot.com/bug?extid=acbe23ac696822b44924
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e09782e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1165612ae00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+acbe23...@syzkaller.appspotmail.com
audit: type=1800 audit(1572603122.582:46): pid=7578 uid=0 auid=4294967295
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
op=collect_data cause=failed comm="syz-executor017" name="bus" dev="sda1"
ino=2233 res=0
audit: type=1800 audit(1572603122.602:47): pid=7580 uid=0 auid=4294967295
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
op=collect_data cause=failed comm="syz-executor017" name="bus" dev="sda1"
ino=2233 res=0
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 1, t=10502 jiffies, g=5309, q=117)
rcu: All QSes seen, last rcu_preempt kthread activity 10502
(4295043461-4295032959), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor017 R running task 25144 7615 7519 0x80000000
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5338 [inline]
sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5313
print_other_cpu_stall kernel/rcu/tree.c:1430 [inline]
check_cpu_stall kernel/rcu/tree.c:1557 [inline]
__rcu_pending kernel/rcu/tree.c:3293 [inline]
rcu_pending kernel/rcu/tree.c:3336 [inline]
rcu_check_callbacks.cold+0xaa1/0xd90 kernel/rcu/tree.c:2682
update_process_times+0x32/0x80 kernel/time/timer.c:1638
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
</IRQ>
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:23 [inline]
RIP: 0010:do_memsw_account mm/memcontrol.c:100 [inline]
RIP: 0010:mem_cgroup_commit_charge+0x1ba/0x4a0 mm/memcontrol.c:6045
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 5a 02 00 00 48 83
3d ab 2b cb 06 00 0f 84 e2 01 00 00 fb 66 0f 1f 44 00 00 <0f> 1f 44 00 00
48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 dd
RSP: 0018:ffff8880a9a3ea28 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48cb RBX: 0000000000000000 RCX: 1ffff11012df7554
RDX: dffffc0000000000 RSI: ffff888096fbaa80 RDI: ffff888096fbaa7c
RBP: ffff8880a9a3ea60 R08: ffffea00011bf908 R09: ffff888096fbaaa0
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea00011bf900
R13: ffff8880aa1c6c00 R14: 0000000000000000 R15: 0000000000000001
__add_to_page_cache_locked+0x6ef/0xc20 mm/filemap.c:889
add_to_page_cache_lru+0x1c9/0x860 mm/filemap.c:927
ext4_mpage_readpages+0x414/0x1ae0 fs/ext4/readpage.c:133
ext4_readpages+0xda/0x120 fs/ext4/inode.c:3355
read_pages+0x101/0x530 mm/readahead.c:123
__do_page_cache_readahead+0x626/0x720 mm/readahead.c:211
ra_submit mm/internal.h:66 [inline]
ondemand_readahead+0x543/0xcd0 mm/readahead.c:493
page_cache_async_readahead mm/readahead.c:575 [inline]
page_cache_async_readahead+0x401/0x790 mm/readahead.c:548
generic_file_buffered_read mm/filemap.c:2122 [inline]
generic_file_read_iter+0x188d/0x2ac0 mm/filemap.c:2384
ext4_file_read_iter+0x180/0x3c0 fs/ext4/file.c:77
call_read_iter include/linux/fs.h:1814 [inline]
new_sync_read fs/read_write.c:406 [inline]
__vfs_read+0x584/0x800 fs/read_write.c:418
integrity_kernel_read+0x14a/0x200 security/integrity/iint.c:200
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:364 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:393 [inline]
ima_calc_file_hash+0x510/0x970 security/integrity/ima/ima_crypto.c:458
ima_collect_measurement+0x50f/0x5c0 security/integrity/ima/ima_api.c:231
process_measurement+0xeca/0x1560 security/integrity/ima/ima_main.c:284
ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x1130/0x45e0 fs/namei.c:3534
do_filp_open+0x1a1/0x280 fs/namei.c:3564
do_sys_open+0x3fe/0x550 fs/open.c:1088
__do_sys_open fs/open.c:1106 [inline]
__se_sys_open fs/open.c:1101 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1101
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4478d9
Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 fb 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f596a372ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 00000000004478d9
RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c
R13: 00007ffd3f94f80f R14: 00007f596a3739c0 R15: 00000000006dcc2c
rcu: rcu_preempt kthread starved for 10502 jiffies! g5309 f0x2
RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 29424 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x866/0x1dc0 kernel/sched/core.c:3515
schedule+0x92/0x1c0 kernel/sched/core.c:3559
schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806
rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot found the following crash on:
HEAD commit: ef244c30 Linux 4.19.81
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1799b684e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=a3e67c0671e5c5e7
dashboard link: https://syzkaller.appspot.com/bug?extid=acbe23ac696822b44924
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e09782e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1165612ae00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+acbe23...@syzkaller.appspotmail.com
audit: type=1800 audit(1572603122.582:46): pid=7578 uid=0 auid=4294967295
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
op=collect_data cause=failed comm="syz-executor017" name="bus" dev="sda1"
ino=2233 res=0
audit: type=1800 audit(1572603122.602:47): pid=7580 uid=0 auid=4294967295
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
op=collect_data cause=failed comm="syz-executor017" name="bus" dev="sda1"
ino=2233 res=0
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 1, t=10502 jiffies, g=5309, q=117)
rcu: All QSes seen, last rcu_preempt kthread activity 10502
(4295043461-4295032959), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor017 R running task 25144 7615 7519 0x80000000
Call Trace:
<IRQ>
sched_show_task kernel/sched/core.c:5338 [inline]
sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5313
print_other_cpu_stall kernel/rcu/tree.c:1430 [inline]
check_cpu_stall kernel/rcu/tree.c:1557 [inline]
__rcu_pending kernel/rcu/tree.c:3293 [inline]
rcu_pending kernel/rcu/tree.c:3336 [inline]
rcu_check_callbacks.cold+0xaa1/0xd90 kernel/rcu/tree.c:2682
update_process_times+0x32/0x80 kernel/time/timer.c:1638
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
__run_hrtimer kernel/time/hrtimer.c:1398 [inline]
__hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
</IRQ>
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:23 [inline]
RIP: 0010:do_memsw_account mm/memcontrol.c:100 [inline]
RIP: 0010:mem_cgroup_commit_charge+0x1ba/0x4a0 mm/memcontrol.c:6045
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 5a 02 00 00 48 83
3d ab 2b cb 06 00 0f 84 e2 01 00 00 fb 66 0f 1f 44 00 00 <0f> 1f 44 00 00
48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 dd
RSP: 0018:ffff8880a9a3ea28 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48cb RBX: 0000000000000000 RCX: 1ffff11012df7554
RDX: dffffc0000000000 RSI: ffff888096fbaa80 RDI: ffff888096fbaa7c
RBP: ffff8880a9a3ea60 R08: ffffea00011bf908 R09: ffff888096fbaaa0
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea00011bf900
R13: ffff8880aa1c6c00 R14: 0000000000000000 R15: 0000000000000001
__add_to_page_cache_locked+0x6ef/0xc20 mm/filemap.c:889
add_to_page_cache_lru+0x1c9/0x860 mm/filemap.c:927
ext4_mpage_readpages+0x414/0x1ae0 fs/ext4/readpage.c:133
ext4_readpages+0xda/0x120 fs/ext4/inode.c:3355
read_pages+0x101/0x530 mm/readahead.c:123
__do_page_cache_readahead+0x626/0x720 mm/readahead.c:211
ra_submit mm/internal.h:66 [inline]
ondemand_readahead+0x543/0xcd0 mm/readahead.c:493
page_cache_async_readahead mm/readahead.c:575 [inline]
page_cache_async_readahead+0x401/0x790 mm/readahead.c:548
generic_file_buffered_read mm/filemap.c:2122 [inline]
generic_file_read_iter+0x188d/0x2ac0 mm/filemap.c:2384
ext4_file_read_iter+0x180/0x3c0 fs/ext4/file.c:77
call_read_iter include/linux/fs.h:1814 [inline]
new_sync_read fs/read_write.c:406 [inline]
__vfs_read+0x584/0x800 fs/read_write.c:418
integrity_kernel_read+0x14a/0x200 security/integrity/iint.c:200
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:364 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:393 [inline]
ima_calc_file_hash+0x510/0x970 security/integrity/ima/ima_crypto.c:458
ima_collect_measurement+0x50f/0x5c0 security/integrity/ima/ima_api.c:231
process_measurement+0xeca/0x1560 security/integrity/ima/ima_main.c:284
ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3422 [inline]
path_openat+0x1130/0x45e0 fs/namei.c:3534
do_filp_open+0x1a1/0x280 fs/namei.c:3564
do_sys_open+0x3fe/0x550 fs/open.c:1088
__do_sys_open fs/open.c:1106 [inline]
__se_sys_open fs/open.c:1101 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1101
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4478d9
Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 fb 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f596a372ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 00000000004478d9
RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c
R13: 00007ffd3f94f80f R14: 00007f596a3739c0 R15: 00000000006dcc2c
rcu: rcu_preempt kthread starved for 10502 jiffies! g5309 f0x2
RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 29424 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2826 [inline]
__schedule+0x866/0x1dc0 kernel/sched/core.c:3515
schedule+0x92/0x1c0 kernel/sched/core.c:3559
schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806
rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
Reply all
Reply to author
Forward
0 new messages