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INFO: rcu detected stall in sys_creat

Status: closed as dup on 2019/01/20 01:52
Subsystems: exfat
[Documentation on labels]
Reported-by: syzbot+3155335ece2c94bead44@syzkaller.appspotmail.com
First crash: 2642d, last: 2550d
▶ ▼ Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
INFO: task hung in generic_file_write_iter fs mm 1 7 2599d 2737d
▶ ▼ Duplicate bugs (9)
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
INFO: task hung in fat_count_free_clusters exfat 1 6 2554d 2733d 0/29 closed as dup on 2018/10/27 13:33
INFO: task hung in deactivate_super exfat 1 36 2563d 2666d 0/29 closed as dup on 2018/10/27 13:17
INFO: task hung in do_unlinkat exfat 1 34 2556d 2792d 0/29 closed as dup on 2018/10/27 13:26
INFO: task hung in mount_bdev isofs 1 1 2588d 2588d 0/29 closed as dup on 2018/12/14 15:35
INFO: rcu detected stall in sys_openat exfat 1 5 2557d 2636d 0/29 closed as dup on 2018/10/27 13:02
INFO: rcu detected stall in generic_file_write_iter mm 1 58 2511d 2653d 0/29 closed as dup on 2018/10/27 15:28
INFO: rcu detected stall in sys_mount (2) exfat 1 1 2590d 2589d 0/29 closed as dup on 2018/12/12 21:01
INFO: rcu detected stall in sys_mknod exfat 1 8 2554d 2636d 0/29 closed as dup on 2018/10/27 13:01
INFO: task hung in __fdget_pos (2) fs 1 36 2563d 2787d 0/29 closed as dup on 2018/10/27 13:29
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
INFO: rcu detected stall in sys_creat 2 (3) 2019/01/20 01:51
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_creat (7) fs 1 1 250d 250d 0/29 auto-obsoleted due to no activity on 2025/08/06 22:34
upstream INFO: rcu detected stall in sys_creat (6) cgroups mm 1 1 344d 344d 0/29 auto-obsoleted due to no activity on 2025/05/04 14:13
upstream INFO: rcu detected stall in sys_creat (5) cgroups mm fs 1 2 570d 616d 0/29 auto-obsoleted due to no activity on 2024/08/22 00:53
upstream INFO: rcu detected stall in sys_creat (4) cgroups mm 1 1 1563d 1563d 0/29 auto-closed as invalid on 2021/12/03 06:38
upstream INFO: rcu detected stall in sys_creat (2) mm 1 1 2234d 2234d 0/29 closed as invalid on 2019/12/04 14:04
upstream INFO: rcu detected stall in sys_creat (3) fs 1 1 2005d 2005d 0/29 auto-closed as invalid on 2020/10/17 06:02
linux-6.1 INFO: rcu detected stall in sys_creat 1 1 875d 875d 0/3 auto-obsoleted due to no activity on 2023/11/30 18:44
linux-5.15 INFO: rcu detected stall in sys_creat 1 1 478d 478d 0/3 auto-obsoleted due to no activity on 2024/12/31 15:05

Sample crash report:
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=516/1/0x4000000000000002 softirq=35047/35047 fqs=4982 
rcu: 	 (t=10500 jiffies g=46501 q=896)
NMI backtrace for cpu 1
CPU: 1 PID: 16000 Comm: syz-executor0 Not tainted 5.0.0-rc2+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211
 print_cpu_stall.cold+0x227/0x40c kernel/rcu/tree.c:1348
 check_cpu_stall kernel/rcu/tree.c:1422 [inline]
 rcu_pending kernel/rcu/tree.c:3018 [inline]
 rcu_check_callbacks+0xb32/0x1380 kernel/rcu/tree.c:2521
 update_process_times+0x32/0x80 kernel/time/timer.c:1635
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:find_get_entry+0x25b/0x10a0 mm/filemap.c:1470
Code: 03 80 3c 02 00 0f 85 9b 0d 00 00 49 8d bf a8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 49 c7 87 a0 fe ff ff 00 00 00 00 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 64 0d 00 00 49 c7 87 a8 fe ff ff 00
RSP: 0018:ffff888057b36b70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff88809725ea60 RCX: 0000000000000002
RDX: ffff888057b36c38 RSI: ffffffff81a092a9 RDI: ffff888057b36c38
RBP: ffff888057b36db8 R08: 0000000000000006 R09: ffff888090c7ea70
R10: ffff888090c7e180 R11: 0000000000000000 R12: 0000000000000004
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888057b36d90
 pagecache_get_page+0xe6/0x1020 mm/filemap.c:1579
 find_get_page_flags include/linux/pagemap.h:278 [inline]
 __find_get_block_slow fs/buffer.c:205 [inline]
 __find_get_block fs/buffer.c:1294 [inline]
 __find_get_block+0x615/0xf20 fs/buffer.c:1288
 __getblk_slow fs/buffer.c:1039 [inline]
 __getblk_gfp+0x295/0xd20 fs/buffer.c:1320
 __bread_gfp+0x2f/0x300 fs/buffer.c:1354
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat__get_entry+0x586/0xa40 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_search_long+0x345/0x17d0 fs/fat/dir.c:479
 vfat_find+0x10e/0x140 fs/fat/namei_vfat.c:697
 vfat_lookup+0x10a/0x6b0 fs/fat/namei_vfat.c:711
 lookup_open+0x726/0x1b80 fs/namei.c:3213
 do_last fs/namei.c:3324 [inline]
 path_openat+0x1983/0x5650 fs/namei.c:3534
 do_filp_open+0x26f/0x370 fs/namei.c:3564
 do_sys_open+0x59a/0x7c0 fs/open.c:1063
 ksys_open include/linux/syscalls.h:1298 [inline]
 __do_sys_creat fs/open.c:1121 [inline]
 __se_sys_creat fs/open.c:1119 [inline]
 __x64_sys_creat+0x61/0x80 fs/open.c:1119
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f83b62c4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f83b62c56d4
R13: 00000000004be60a R14: 00000000004cec18 R15: 00000000ffffffff
net_ratelimit: 8 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
net_ratelimit: 8 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1

Crashes (98):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/19 05:45 upstream 2339e91d0e66 2103a236 .config console log report ci-upstream-kasan-gce-root
2019/01/15 11:24 upstream fe76fc6aaf53 ebacf5cb .config console log report ci-upstream-kasan-gce-smack-root
2019/01/13 16:00 upstream e1706720408e c3f3344c .config console log report ci-upstream-kasan-gce-smack-root
2019/01/12 16:40 upstream 4b3c31c8d4dd c3f3344c .config console log report ci-upstream-kasan-gce-smack-root
2019/01/11 02:05 upstream 1bdbe2274920 80dde172 .config console log report ci-upstream-kasan-gce-root
2019/01/10 17:50 upstream ba422731316d db9b6579 .config console log report ci-upstream-kasan-gce-root
2019/01/10 06:39 upstream 4064e47c8281 45c0c1b1 .config console log report ci-upstream-kasan-gce-selinux-root
2019/01/08 20:24 upstream 3bd6e94bec12 010ed08b .config console log report ci-upstream-kasan-gce-smack-root
2019/01/08 02:50 upstream 3bd6e94bec12 69d69aa9 .config console log report ci-upstream-kasan-gce-smack-root
2019/01/07 12:21 upstream 3bd6e94bec12 69d69aa9 .config console log report ci-upstream-kasan-gce-smack-root
2019/01/06 17:18 upstream b5aef86e089a 94f8adb5 .config console log report ci-upstream-kasan-gce-root
2019/01/04 00:57 upstream 645ff1e8e704 7da23925 .config console log report ci-upstream-kasan-gce-smack-root
2019/01/02 21:20 upstream 8e143b90e4d4 f0491811 .config console log report ci-upstream-kasan-gce-root
2018/12/30 19:48 upstream 195303136f19 9942de5f .config console log report ci-upstream-kasan-gce-smack-root
2018/12/30 12:33 upstream 195303136f19 9942de5f .config console log report ci-upstream-kasan-gce-root
2018/12/28 12:35 upstream 00c569b567c7 fc6ae81a .config console log report ci-upstream-kasan-gce-smack-root
2018/12/24 08:15 upstream 8fe28cb58bcb be79df56 .config console log report ci-upstream-kasan-gce-root
2018/12/22 13:59 upstream 23203e3f34c9 e3bd7ab8 .config console log report ci-upstream-kasan-gce-root
2018/12/19 09:53 upstream 62393dbcbe0f 4edaba93 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/19 06:03 upstream ddfbab46539f 4edaba93 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/18 13:25 upstream 1a9430db2835 4edaba93 .config console log report ci-upstream-kasan-gce-root
2018/12/15 20:28 upstream 6531e115b7ab def91db3 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/13 14:26 upstream f5d582777bcb f3d9d594 .config console log report ci-upstream-kasan-gce-selinux-root
2018/12/10 00:07 upstream 0844895a2e51 96cc4c50 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/09 19:18 upstream 8214bdf7d3e6 979179d6 .config console log report ci-upstream-kasan-gce-root
2018/12/08 21:34 upstream 8214bdf7d3e6 60562a1d .config console log report ci-upstream-kasan-gce-smack-root
2018/12/08 00:51 upstream 5f179793f0a7 65ed2472 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/07 12:44 upstream b72f711a4efa 1eb6a7e4 .config console log report ci-upstream-kasan-gce-root
2018/12/06 11:21 upstream cf76c364a1e1 3ab38479 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/05 11:56 upstream 0072a0c14d5b ac6c0578 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/04 10:42 upstream 0072a0c14d5b 6ad0ae61 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/03 20:45 upstream 2595646791c3 819002b0 .config console log report ci-upstream-kasan-gce-selinux-root
2018/12/02 00:36 upstream d8f190ee836a 5a581673 .config console log report ci-upstream-kasan-gce-smack-root
2018/12/01 03:24 upstream b6839ef26e54 d8988561 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/23 23:50 upstream 44786880df19 a8292de9 .config console log report ci-upstream-kasan-gce-smack-root
2019/01/20 16:42 linux-next 9673b4aa71ca fd37a550 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/17 07:11 linux-next a37d50ca3b83 c2faf9b2 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/16 15:28 linux-next cbeb3db684f7 d538790b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/11 00:32 linux-next 6cab33afc3dd 80dde172 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/08 05:06 linux-next 139287cc2cc0 69d69aa9 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/07 00:26 linux-next a4983672f9ca ee332608 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/05 04:21 linux-next a4983672f9ca 53be0a37 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/04 21:17 linux-next a4983672f9ca 0127e3ba .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/04 09:51 linux-next a4983672f9ca 7da23925 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/02 11:13 linux-next 4cd1b60def51 f0491811 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/30 00:07 linux-next 6a1d293238c1 35e3f847 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/26 12:00 linux-next 6a1d293238c1 8a41a0ad .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/14 12:00 linux-next d14b746c6c1c 7624ddd6 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/07 09:22 linux-next 74c4a24df7ca dcf836b1 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/03 17:05 linux-next 442b8cea2477 819002b0 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/03 11:20 linux-next 442b8cea2477 819002b0 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/02 10:57 linux-next 442b8cea2477 e0d8c853 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/23 09:39 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/20 16:43 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.