syzbot


INFO: task hung in cec_claim_log_addrs

Status: upstream: reported on 2024/02/03 23:37
Reported-by: syzbot+4174d9966de01db763e2@syzkaller.appspotmail.com
First crash: 94d, last: 94d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in cec_claim_log_addrs media C inconclusive 6 29d 76d 0/26 upstream: reported C repro on 2024/02/21 06:13

Sample crash report:
INFO: task syz-executor.0:5421 blocked for more than 152 seconds.
      Not tainted 5.15.148-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid: 5421 ppid:  4010 flags:0x0000000d
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1860
 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138
 cec_claim_log_addrs+0x154/0x1e4 drivers/media/cec/core/cec-adap.c:1552
 __cec_s_log_addrs+0x1160/0x17b0 drivers/media/cec/core/cec-adap.c:1817
 cec_adap_s_log_addrs drivers/media/cec/core/cec-api.c:184 [inline]
 cec_ioctl+0x2864/0x39f4 drivers/media/cec/core/cec-api.c:528
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/03 23:36 linux-5.15.y 6139f2a02fe0 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in cec_claim_log_addrs
* Struck through repros no longer work on HEAD.