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[syzbot] [net?] possible deadlock in ptp_clock_unregister | 1 (3) | 2025/06/10 01:01 |
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[syzbot] [net?] possible deadlock in ptp_clock_unregister | 1 (3) | 2025/06/10 01:01 |
ptp ptp0: delete virtual clock ptp15 ============================================ WARNING: possible recursive locking detected 6.16.0-rc1-syzkaller #0 Not tainted -------------------------------------------- syz-executor421/5891 is trying to acquire lock: ffff888079fcc868 (&ptp->n_vclocks_mux){+.+.}-{4:4}, at: ptp_vclock_in_use drivers/ptp/ptp_private.h:103 [inline] ffff888079fcc868 (&ptp->n_vclocks_mux){+.+.}-{4:4}, at: ptp_clock_unregister+0x21/0x250 drivers/ptp/ptp_clock.c:415 but task is already holding lock: ffff8880300cc868 (&ptp->n_vclocks_mux){+.+.}-{4:4}, at: n_vclocks_store+0xf1/0x6d0 drivers/ptp/ptp_sysfs.c:215 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ptp->n_vclocks_mux); lock(&ptp->n_vclocks_mux); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor421/5891: #0: ffff88803631c428 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0x12a/0x250 fs/read_write.c:738 #1: ffff888031c2c488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x28f/0x510 fs/kernfs/file.c:325 #2: ffff8880303d4878 (kn->active#57){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b2/0x510 fs/kernfs/file.c:326 #3: ffff8880300cc868 (&ptp->n_vclocks_mux){+.+.}-{4:4}, at: n_vclocks_store+0xf1/0x6d0 drivers/ptp/ptp_sysfs.c:215 stack backtrace: CPU: 1 UID: 0 PID: 5891 Comm: syz-executor421 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_deadlock_bug+0x1e9/0x240 kernel/locking/lockdep.c:3044 check_deadlock kernel/locking/lockdep.c:3096 [inline] validate_chain kernel/locking/lockdep.c:3898 [inline] __lock_acquire+0x1106/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747 ptp_vclock_in_use drivers/ptp/ptp_private.h:103 [inline] ptp_clock_unregister+0x21/0x250 drivers/ptp/ptp_clock.c:415 ptp_vclock_unregister+0x11a/0x160 drivers/ptp/ptp_vclock.c:228 unregister_vclock+0x108/0x1a0 drivers/ptp/ptp_sysfs.c:177 device_for_each_child_reverse+0x136/0x1a0 drivers/base/core.c:4051 n_vclocks_store+0x4b6/0x6d0 drivers/ptp/ptp_sysfs.c:241 dev_attr_store+0x58/0x80 drivers/base/core.c:2440 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x351/0x510 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x6c4/0x1150 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f577c6b6f29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 1d 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffefa44cc98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f577c6b6f29 RDX: 00000000000005c8 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffefa44ccdc R13: 00007ffefa44ccf0 R14: 00007ffefa44cd30 R15: 0000000000000004 </TASK> ptp ptp0: guarantee physical clock free running
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/06/10 00:45 | upstream | 19272b37aa4f | 4826c28e | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | |
2025/06/08 00:44 | upstream | 8630c59e9936 | 4826c28e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/06/01 20:58 | upstream | 7d4e49a77d99 | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/31 08:57 | upstream | 8477ab143069 | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/24 05:55 | upstream | 4856ebd99715 | ed351ea7 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/21 12:13 | upstream | 4a95bc121ccd | dc5d3808 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/21 01:37 | upstream | b36ddb9210e6 | b47f9e02 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/19 20:11 | upstream | a5806cd506af | 8f9cf946 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/19 07:14 | upstream | a5806cd506af | f41472b0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/19 07:13 | upstream | a5806cd506af | f41472b0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/19 04:01 | upstream | a5806cd506af | f41472b0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/18 14:13 | upstream | 5723cc3450bc | f41472b0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/16 16:10 | upstream | fee3e843b309 | cfde8269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/16 02:07 | upstream | 088d13246a46 | cfde8269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/15 20:28 | upstream | 088d13246a46 | cfde8269 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/13 22:18 | upstream | 405e6c37c89e | 7344edeb | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/13 18:36 | upstream | e9565e23cd89 | 9497799b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/11 03:09 | upstream | 3ce9925823c7 | 77908e5f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/10 20:37 | upstream | 1a33418a69cc | 77908e5f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister | ||
2025/05/10 19:41 | upstream | 1a33418a69cc | 77908e5f | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | possible deadlock in ptp_clock_unregister |