syzbot


INFO: task hung in truncate_inode_pages_range (2)

Status: auto-closed as invalid on 2019/12/08 23:58
Reported-by: syzbot+be32d4802777e13fdfff@syzkaller.appspotmail.com
First crash: 1708d, last: 1708d
Similar bugs (11)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in truncate_inode_pages_range C error 1 925d 1165d 0/1 upstream: reported C repro on 2021/02/03 07:50
android-44 INFO: task hung in truncate_inode_pages_range 7 2180d 2257d 0/2 auto-closed as invalid on 2019/02/22 13:19
upstream INFO: task hung in truncate_inode_pages_range (5) fs mm 1 477d 477d 0/26 auto-obsoleted due to no activity on 2023/04/15 01:38
linux-4.14 INFO: task hung in truncate_inode_pages_range C error 2 598d 1241d 0/1 upstream: reported C repro on 2020/11/19 23:29
android-49 INFO: task hung in truncate_inode_pages_range 86 2098d 2257d 0/3 auto-closed as invalid on 2019/02/22 14:33
upstream INFO: task hung in truncate_inode_pages_range (2) fs mm 10 1598d 1667d 0/26 auto-closed as invalid on 2020/02/27 00:38
upstream INFO: task hung in truncate_inode_pages_range (4) block 1 858d 858d 0/26 closed as invalid on 2022/02/08 09:50
upstream INFO: task hung in truncate_inode_pages_range (3) fs 1 1381d 1381d 0/26 auto-closed as invalid on 2020/08/31 17:47
upstream INFO: task hung in truncate_inode_pages_range (6) squashfs fuse C 1 326d 322d 0/26 auto-obsoleted due to no activity on 2024/02/27 16:22
upstream INFO: task hung in truncate_inode_pages_range exfat 151 1981d 2316d 0/26 closed as dup on 2017/12/12 16:49
linux-6.1 INFO: task hung in truncate_inode_pages_range origin:upstream C 2 26d 326d 0/3 upstream: reported C repro on 2023/05/23 07:52

Sample crash report:
audit: type=1400 audit(1565481249.431:12070): avc:  denied  { setopt } for  pid=9837 comm="syz-executor.3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
INFO: task syz-executor.1:2107 blocked for more than 140 seconds.
      Not tainted 4.9.188+ #19
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D24904  2107      1 0x00000004
 0000000000000083 ffff8801d0838000 ffff8801d47d9b80 ffff8801db621000
 ffff8801d293af80 ffff8801db621018 ffff8801a82177a0 ffffffff8281749e
 ffff8801d083887c ffff8801a82177a0 00ffffff828283e6 ffff8801db6218f0
Call Trace:
 [<000000003699d413>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
 [<000000008a0c2703>] schedule_timeout+0x766/0xe50 kernel/time/timer.c:1771
 [<00000000444da438>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5171
 [<0000000044be09b7>] io_schedule include/linux/sched.h:432 [inline]
 [<0000000044be09b7>] wait_on_page_bit_common mm/filemap.c:910 [inline]
 [<0000000044be09b7>] wait_on_page_bit+0x34c/0x660 mm/filemap.c:949
 [<00000000cf335ced>] wait_on_page_writeback include/linux/pagemap.h:534 [inline]
 [<00000000cf335ced>] truncate_inode_pages_range+0x6fc/0xfe0 mm/truncate.c:375
 [<00000000f019a8fb>] truncate_inode_pages mm/truncate.c:401 [inline]
 [<00000000f019a8fb>] truncate_inode_pages_final+0x81/0xc0 mm/truncate.c:452
 [<00000000534429ed>] ext4_evict_inode+0x3e2/0x1270 fs/ext4/inode.c:234
 [<00000000cce793fd>] evict+0x2e9/0x630 fs/inode.c:553
 [<00000000388f65bc>] iput_final fs/inode.c:1516 [inline]
 [<00000000388f65bc>] iput fs/inode.c:1543 [inline]
 [<00000000388f65bc>] iput+0x370/0x900 fs/inode.c:1528
 [<00000000362434ae>] do_unlinkat+0x395/0x610 fs/namei.c:4134
 [<000000009c228155>] SYSC_unlink fs/namei.c:4175 [inline]
 [<000000009c228155>] SyS_unlink+0x1b/0x20 fs/namei.c:4173
 [<000000009c0c48fa>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<000000004a598f78>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<000000002a9f3c3f>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
 #0:  (rcu_read_lock){......}, at: [<000000002a9f3c3f>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263
 #1:  (tasklist_lock){.+.+..}, at: [<00000000163ba423>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
2 locks held by getty/2037:
 #0:  (&tty->ldisc_sem){++++++}, at: [<00000000d97795ec>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<000000006fdc51f9>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.1/2107:
 #0:  (sb_writers#4){.+.+.+}, at: [<000000003fbc84ff>] sb_start_write include/linux/fs.h:1579 [inline]
 #0:  (sb_writers#4){.+.+.+}, at: [<000000003fbc84ff>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
3 locks held by kworker/u4:13/366:
 #0:  ("writeback"){++++.+}, at: [<000000008e1feb20>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107
 #1:  ((&(&wb->dwork)->work)){+.+.+.}, at: [<0000000042c39c3e>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111
 #2:  (&type->s_umount_key#22){++++..}, at: [<00000000d11469df>] trylock_super+0x20/0xf0 fs/super.c:403
2 locks held by syz-executor.2/5929:
 #0:  (sb_writers#4){.+.+.+}, at: [<0000000027573b8e>] file_start_write include/linux/fs.h:2646 [inline]
 #0:  (sb_writers#4){.+.+.+}, at: [<0000000027573b8e>] do_sendfile+0x93a/0xc00 fs/read_write.c:1401
 #1:  (&sb->s_type->i_mutex_key#9){+.+.+.}, at: [<000000004128f99e>] inode_lock include/linux/fs.h:771 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){+.+.+.}, at: [<000000004128f99e>] ext4_file_write_iter+0x111/0xcd0 fs/ext4/file.c:100
1 lock held by syz-executor.2/5952:
 #0:  (sb_writers#4){.+.+.+}, at: [<0000000027573b8e>] file_start_write include/linux/fs.h:2646 [inline]
 #0:  (sb_writers#4){.+.+.+}, at: [<0000000027573b8e>] do_sendfile+0x93a/0xc00 fs/read_write.c:1401
1 lock held by syz-executor.3/9837:
 #0:  (&sbi->s_journal_flag_rwsem){.+.+.+}, at: [<00000000a62a8c27>] do_writepages+0xfc/0x1e0 mm/page-writeback.c:2338

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.188+ #19
 ffff8801d98d7cc8 ffffffff81b64a21 0000000000000001 0000000000000000
 0000000000000001 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00
 ffffffff81b6fcbc 0000000000000001 0000000000000000 0000000000000001
Call Trace:
 [<00000000d61bfc93>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000d61bfc93>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000c460d456>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99
 [<0000000016895227>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60
 [<00000000e1f8903e>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<00000000645787b3>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<00000000645787b3>] check_hung_task kernel/hung_task.c:126 [inline]
 [<00000000645787b3>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline]
 [<00000000645787b3>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
 [<00000000c3a63bac>] kthread+0x278/0x310 kernel/kthread.c:211
 [<0000000036bff467>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff828265f1

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/10 23:57 https://android.googlesource.com/kernel/common android-4.9 62dc1f1d7c81 acb51638 .config console log report ci-android-49-kasan-gce-root
* Struck through repros no longer work on HEAD.