syzbot


INFO: task hung in __blockdev_direct_IO

Status: auto-closed as invalid on 2021/02/21 17:05
Reported-by: syzbot+741d94d50c34ef6f89ee@syzkaller.appspotmail.com
First crash: 613d, last: 613d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in __blockdev_direct_IO 9 1314d 1172d 0/3 auto-closed as invalid on 2019/05/22 07:01

Sample crash report:
Bluetooth: hci0 command 0x0406 tx timeout
Bluetooth: hci3 command 0x0406 tx timeout
Bluetooth: hci4 command 0x0406 tx timeout
Bluetooth: hci5 command 0x0406 tx timeout
Bluetooth: hci2 command 0x0406 tx timeout
INFO: task syz-executor.3:14743 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D27440 14743   8019 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 io_schedule+0xb5/0x120 kernel/sched/core.c:5036
 dio_await_one+0x201/0x400 fs/direct-io.c:523
 dio_await_completion fs/direct-io.c:579 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1393 [inline]
 __blockdev_direct_IO+0x79ad/0xdc60 fs/direct-io.c:1422
 ext4_direct_IO_write fs/ext4/inode.c:3716 [inline]
 ext4_direct_IO+0x888/0x1b80 fs/ext4/inode.c:3857
 generic_file_direct_write+0x1df/0x420 mm/filemap.c:2958
 __generic_file_write_iter+0x2a2/0x590 mm/filemap.c:3137
 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007f6af8cffc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003ab80 RCX: 000000000045de59
RDX: 000000000f642e7e RSI: 0000000020000200 RDI: 0000000000000006
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fffb007013f R14: 00007f6af8d009c0 R15: 000000000118bf2c
INFO: task syz-executor.3:14755 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29160 14755   8019 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 scsi_block_when_processing_errors+0x299/0x340 drivers/scsi/scsi_error.c:315
 sg_open+0x2f1/0x1490 drivers/scsi/sg.c:322
 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423
 do_dentry_open+0x44b/0xec0 fs/open.c:777
 vfs_open+0x105/0x220 fs/open.c:888
 do_last fs/namei.c:3428 [inline]
 path_openat+0x628/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417951
RSP: 002b:00007f6af8cde820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f6af8cde850
RBP: 000000000118c008 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bfd4
R13: 00007fffb007013f R14: 00007f6af8cdf9c0 R15: 000000000118bfd4
INFO: task syz-executor.3:14797 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29504 14797   8019 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x343/0x6d0 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:56
 inode_lock include/linux/fs.h:719 [inline]
 process_measurement+0x4f5/0xb20 security/integrity/ima/ima_main.c:206
 do_last fs/namei.c:3435 [inline]
 path_openat+0x10ad/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007f6af8c9cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000002980 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 000000000118c150 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c124
R13: 00007fffb007013f R14: 00007f6af8c9d9c0 R15: 000000000118c124
INFO: task syz-executor.2:14749 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D27184 14749   8021 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 io_schedule+0xb5/0x120 kernel/sched/core.c:5036
 dio_await_one+0x201/0x400 fs/direct-io.c:523
 dio_await_completion fs/direct-io.c:579 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1393 [inline]
 __blockdev_direct_IO+0x79ad/0xdc60 fs/direct-io.c:1422
 ext4_direct_IO_write fs/ext4/inode.c:3716 [inline]
 ext4_direct_IO+0x888/0x1b80 fs/ext4/inode.c:3857
 generic_file_direct_write+0x1df/0x420 mm/filemap.c:2958
 __generic_file_write_iter+0x2a2/0x590 mm/filemap.c:3137
 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007f2972c56c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003ab80 RCX: 000000000045de59
RDX: 000000000f642e7e RSI: 0000000020000200 RDI: 0000000000000004
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffe359679ff R14: 00007f2972c579c0 R15: 000000000118bf2c
INFO: task syz-executor.2:14765 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D30016 14765   8021 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 scsi_block_when_processing_errors+0x299/0x340 drivers/scsi/scsi_error.c:315
 sg_open+0x2f1/0x1490 drivers/scsi/sg.c:322
 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423
 do_dentry_open+0x44b/0xec0 fs/open.c:777
 vfs_open+0x105/0x220 fs/open.c:888
 do_last fs/namei.c:3428 [inline]
 path_openat+0x628/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417951
RSP: 002b:00007f2972c35820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f2972c35850
RBP: 000000000118c008 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000118bfd4
R13: 00007ffe359679ff R14: 00007f2972c369c0 R15: 000000000118bfd4
INFO: task syz-executor.2:14798 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D29504 14798   8021 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x343/0x6d0 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:56
 inode_lock include/linux/fs.h:719 [inline]
 process_measurement+0x4f5/0xb20 security/integrity/ima/ima_main.c:206
 do_last fs/namei.c:3435 [inline]
 path_openat+0x10ad/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007f2972c14c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000002980 RCX: 000000000045de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 000000000118c0a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c07c
R13: 00007ffe359679ff R14: 00007f2972c159c0 R15: 000000000118c07c
INFO: task syz-executor.1:14761 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29336 14761   8020 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1731
 do_wait_for_common kernel/sched/completion.c:91 [inline]
 __wait_for_common kernel/sched/completion.c:112 [inline]
 wait_for_common+0x272/0x430 kernel/sched/completion.c:123
 virtscsi_tmf.constprop.0+0xe5/0x2d0 drivers/scsi/virtio_scsi.c:608
 virtscsi_device_reset+0x275/0x320 drivers/scsi/virtio_scsi.c:650
 scsi_try_bus_device_reset drivers/scsi/scsi_error.c:865 [inline]
 scsi_ioctl_reset+0x3b7/0x780 drivers/scsi/scsi_error.c:2330
 scsi_ioctl+0xc5/0x7dc drivers/scsi/scsi_ioctl.c:267
 sg_ioctl+0x51f/0x2617 drivers/scsi/sg.c:1159
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de59
RSP: 002b:00007fd405018c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000149c0 RCX: 000000000045de59
RDX: 00000000200003c0 RSI: 0000000000002284 RDI: 0000000000000003
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fffce95da9f R14: 00007fd4050199c0 R15: 000000000118bf2c
INFO: task syz-executor.4:14777 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29752 14777   8023 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 scsi_block_when_processing_errors+0x299/0x340 drivers/scsi/scsi_error.c:315
 sg_open+0x2f1/0x1490 drivers/scsi/sg.c:322
 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423
 do_dentry_open+0x44b/0xec0 fs/open.c:777
 vfs_open+0x105/0x220 fs/open.c:888
 do_last fs/namei.c:3428 [inline]
 path_openat+0x628/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417951
RSP: 002b:00007f9c5a032820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f9c5a032850
RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000
R10: 00007f9c5a0339d0 R11: 0000000000000293 R12: 000000000118bf2c
R13: 00007fff6958afef R14: 00007f9c5a0339c0 R15: 000000000118bf2c
INFO: task syz-executor.0:14779 blocked for more than 140 seconds.
      Not tainted 4.14.202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D29000 14779   8018 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 scsi_block_when_processing_errors+0x299/0x340 drivers/scsi/scsi_error.c:315
 sg_open+0x2f1/0x1490 drivers/scsi/sg.c:322
 chrdev_open+0x23c/0x6d0 fs/char_dev.c:423
 do_dentry_open+0x44b/0xec0 fs/open.c:777
 vfs_open+0x105/0x220 fs/open.c:888
 do_last fs/namei.c:3428 [inline]
 path_openat+0x628/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x417951
RSP: 002b:00007fb19ac62820 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000417951
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fb19ac62850
RBP: 000000000118bf60 R08: 000000000000000f R09: 0000000000000000
R10: 00007fb19ac639d0 R11: 0000000000000293 R12: 000000000118bf2c
R13: 00007ffd8b57bfcf R14: 00007fb19ac639c0 R15: 000000000118bf2c

Showing all locks held in the system:
1 lock held by khungtaskd/1531:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff81430a04>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
1 lock held by in:imklog/7685:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818f88cb>] __fdget_pos+0x1fb/0x2b0 fs/file.c:769
3 locks held by syz-executor.3/14743:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818f88cb>] __fdget_pos+0x1fb/0x2b0 fs/file.c:769
 #1:  (sb_writers#3){.+.+}, at: [<ffffffff81892358>] file_start_write include/linux/fs.h:2712 [inline]
 #1:  (sb_writers#3){.+.+}, at: [<ffffffff81892358>] vfs_write+0x3d8/0x4d0 fs/read_write.c:543
 #2:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff81ba743c>] inode_trylock include/linux/fs.h:739 [inline]
 #2:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff81ba743c>] ext4_file_write_iter+0x1cc/0xd20 fs/ext4/file.c:236
2 locks held by syz-executor.3/14797:
 #0:  (sb_writers#3){.+.+}, at: [<ffffffff819017aa>] sb_start_write include/linux/fs.h:1549 [inline]
 #0:  (sb_writers#3){.+.+}, at: [<ffffffff819017aa>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff82f62ec5>] inode_lock include/linux/fs.h:719 [inline]
 #1:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff82f62ec5>] process_measurement+0x4f5/0xb20 security/integrity/ima/ima_main.c:206
3 locks held by syz-executor.2/14749:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818f88cb>] __fdget_pos+0x1fb/0x2b0 fs/file.c:769
 #1:  (sb_writers#3){.+.+}, at: [<ffffffff81892358>] file_start_write include/linux/fs.h:2712 [inline]
 #1:  (sb_writers#3){.+.+}, at: [<ffffffff81892358>] vfs_write+0x3d8/0x4d0 fs/read_write.c:543
 #2:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff81ba743c>] inode_trylock include/linux/fs.h:739 [inline]
 #2:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff81ba743c>] ext4_file_write_iter+0x1cc/0xd20 fs/ext4/file.c:236
2 locks held by syz-executor.2/14798:
 #0:  (sb_writers#3){.+.+}, at: [<ffffffff819017aa>] sb_start_write include/linux/fs.h:1549 [inline]
 #0:  (sb_writers#3){.+.+}, at: [<ffffffff819017aa>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff82f62ec5>] inode_lock include/linux/fs.h:719 [inline]
 #1:  (&sb->s_type->i_mutex_key#10){+.+.}, at: [<ffffffff82f62ec5>] process_measurement+0x4f5/0xb20 security/integrity/ima/ima_main.c:206

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

NMI backtrace for cpu 1
CPU: 1 PID: 1531 Comm: khungtaskd Not tainted 4.14.202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
 watchdog+0x5b9/0xb40 kernel/hung_task.c:274
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3606 Comm: kworker/u4:5 Not tainted 4.14.202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff8880a93805c0 task.stack: ffff8880a93a0000
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:__rcu_read_unlock+0x5c/0x160 kernel/rcu/update.c:266
RSP: 0018:ffff8880a93a7cc0 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: ffff8880a93805c0 RCX: 1ffffffff11979ac
RDX: 0000000000000000 RSI: ffffffff87cccaa0 RDI: ffff8880a9380944
RBP: ffff8880a9380940 R08: 0000000000000000 R09: 0000000000020012
R10: ffff8880a9380e98 R11: ffff8880a93805c0 R12: dffffc0000000000
R13: ffff8880a8da6d00 R14: ffff88813fe1a8c0 R15: ffff8880a4a44800
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f225cdb5000 CR3: 00000000a18b3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_read_unlock include/linux/rcupdate.h:684 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:420 [inline]
 batadv_nc_worker+0x58a/0xc50 net/batman-adv/network-coding.c:726
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 00 8b 83 80 03 00 00 83 f8 01 74 47 83 e8 01 89 83 80 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 14 02 <48> 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b4 00 00 00 

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/10/24 17:04 linux-4.14.y 5b7a52cd2eef a1839e81 .config log report info