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[syzbot] [kernel?] INFO: task hung in vfs_coredump (2) | 0 (1) | 2025/08/03 18:20 |
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[syzbot] [kernel?] INFO: task hung in vfs_coredump (2) | 0 (1) | 2025/08/03 18:20 |
Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|---|
upstream | INFO: task hung in vfs_coredump io-uring | 1 | syz | 3 | 82d | 79d | 0/29 | closed as invalid on 2025/07/10 23:03 |
INFO: task syz.0.17:6083 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26344 pid:6083 tgid:6083 ppid:5991 task_flags:0x400640 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5360 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964 __schedule_loop kernel/sched/core.c:7046 [inline] schedule+0x165/0x360 kernel/sched/core.c:7061 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x3da/0x710 kernel/sched/completion.c:121 wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:269 coredump_wait fs/coredump.c:534 [inline] vfs_coredump+0x8cf/0x2a60 fs/coredump.c:1131 get_signal+0x1109/0x1340 kernel/signal.c:3019 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:40 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:73 exc_page_fault+0xab/0x100 arch/x86/mm/fault.c:1535 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f73b6c4f927 RSP: 002b:00007ffd385e63e0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 000000000000000b RCX: ffffffffffffffa8 RDX: 00007ffd385e6400 RSI: 00007ffd385e6530 RDI: 000000000000000b RBP: 0000000000000032 R08: 7fffffffffffffff R09: 00000007386e4dbf R10: 00007ffd386e4bc0 R11: 0000000000000246 R12: 00007f73b6fd609c R13: 00007ffd386e4bc0 R14: 000000000001a29f R15: 00007ffd386e4be0 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e53c820 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e53c820 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e53c820 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 2 locks held by getty/5631: #0: ffff88814dfaf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036c62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 6 locks held by syz-executor/6362: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0xf60/0xfa0 kernel/hung_task.c:495 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 3487 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline] RIP: 0010:unwind_next_frame+0xc3c/0x2390 arch/x86/kernel/unwind_orc.c:585 Code: 3c 01 0f 85 f9 0c 00 00 48 8d 43 08 4c 39 f8 0f 97 c1 4c 39 e0 0f 96 c0 20 c8 3c 01 0f 85 df 0c 00 00 48 89 df e8 84 23 00 00 <48> 89 c3 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 30 80 3c 28 00 RSP: 0018:ffffc9000b8c6918 EFLAGS: 00000202 RAX: ffffffff8b007ecf RBX: ffffc9000b8c7988 RCX: 1ffff92001718d01 RDX: ffffffff9116c31a RSI: 0000000000000002 RDI: ffffc9000b8c7988 RBP: 1ffff92001718d3e R08: 0000000000000001 R09: ffffffff81740d25 R10: ffffc9000b8c6a38 R11: ffffffff81ac8160 R12: ffffc9000b8c8000 R13: 1ffff92001718d3f R14: ffffc9000b8c69e8 R15: ffffc9000b8c0000 FS: 0000000000000000(0000) GS:ffff8881258a7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca32d07d60 CR3: 000000000e338000 CR4: 00000000003526f0 Call Trace: <TASK> arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2474 [inline] slab_free mm/slub.c:6181 [inline] kfree+0x199/0x6d0 mm/slub.c:6389 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2385 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline] ieee80211_ibss_rx_queued_mgmt+0xa36/0x2ae0 net/mac80211/ibss.c:1600 ieee80211_iface_process_skb net/mac80211/iface.c:1699 [inline] ieee80211_iface_work+0x85f/0x12d0 net/mac80211/iface.c:1753 cfg80211_wiphy_work+0x2bb/0x470 net/wireless/core.c:435 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/09/16 04:36 | linux-next | 590b221ed425 | e2beed91 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in vfs_coredump | |
2025/09/11 05:15 | linux-next | 5f540c4aade9 | fdeaa69b | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in vfs_coredump | |
2025/09/06 15:51 | linux-next | be5d4872e528 | d291dd2d | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in vfs_coredump | |
2025/07/30 18:01 | linux-next | d086c886ceb9 | f8f2b4da | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in vfs_coredump | |
2025/09/17 05:34 | upstream | 5aca7966d2a7 | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/09/13 11:25 | upstream | 22f20375f5b7 | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in vfs_coredump | ||
2025/09/07 03:00 | upstream | b236920731dd | d291dd2d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/09/02 08:19 | upstream | b320789d6883 | 807a3b61 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/08/25 11:57 | upstream | 69fd6b99b8f8 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/08/24 08:36 | upstream | 8d245acc1e88 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/24 02:47 | upstream | 8d245acc1e88 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in vfs_coredump | ||
2025/08/23 12:52 | upstream | 6debb6904172 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: task hung in vfs_coredump | ||
2025/08/22 14:35 | upstream | 3957a5720157 | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/12 00:38 | upstream | 8f5ae30d69d7 | c06e8995 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/08/05 06:20 | upstream | d2eedaa3909b | abdcb213 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/05 00:21 | upstream | d2eedaa3909b | f5bcc8dc | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/08/01 01:00 | upstream | 260f6f4fda93 | 0c075d67 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/07/31 18:02 | upstream | 260f6f4fda93 | 3526e777 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | INFO: task hung in vfs_coredump | ||
2025/09/18 15:46 | linux-next | ae2d20002576 | e2beed91 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/09/10 21:16 | linux-next | 5f540c4aade9 | fdeaa69b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/09/07 12:07 | linux-next | be5d4872e528 | d291dd2d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/25 06:16 | linux-next | 7fa4d8dc380f | bf27483f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/20 11:18 | linux-next | 5303936d609e | 79512909 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/08/17 12:29 | linux-next | 931e46dcbc7e | 1804e95e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: task hung in vfs_coredump | ||
2025/07/28 11:10 | linux-next | d086c886ceb9 | fb8f743d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-rust-kasan-gce | INFO: task hung in vfs_coredump |