syzbot has found a reproducer for the following issue on: HEAD commit: de9df030ccb5 usb: typec: ucsi: glink: be more precise on o.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=15637ea7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=358c1689354aeef3 dashboard link: https://syzkaller.appspot.com/bug?extid=6fb78d577e89e69602f9 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101db8c0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1738f4e8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fcce9dc5242d/disk-de9df030.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/420ef3e22854/vmlinux-de9df030.xz kernel image: https://storage.googleapis.com/syzbot-assets/a6d0ac1f944e/bzImage-de9df030.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6fb78d577e89e69602f9@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9 at kernel/workqueue.c:2257 __queue_work+0xc3a/0x1080 kernel/workqueue.c:2256 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc6-syzkaller-00106-gde9df030ccb5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:__queue_work+0xc3a/0x1080 kernel/workqueue.c:2256 Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 7f 46 8b 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 40 bf 32 00 85 db 75 60 e8 f7 bc 32 00 90 <0f> 0b 90 e9 f9 f7 ff ff e8 e9 bc 32 00 90 0f 0b 90 e9 a8 f7 ff ff RSP: 0018:ffffc90000007bf0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff812335c1 RDX: ffff888101698000 RSI: ffffffff81233619 RDI: 0000000000000005 RBP: ffff88811a063780 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000000 R12: 1ffff92000000f90 R13: 0000000000000001 R14: 0000000000000101 R15: ffff888106b28800 FS: 0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7cbbc0c258 CR3: 0000000116944000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1840 [inline] __run_timers+0x56a/0x930 kernel/time/timer.c:2419 __run_timer_base kernel/time/timer.c:2430 [inline] __run_timer_base kernel/time/timer.c:2423 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2439 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449 handle_softirqs+0x206/0x8d0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xac/0x110 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2042 [inline] RIP: 0010:vprintk_emit+0x621/0x6f0 kernel/printk/printk.c:2406 Code: 85 ed 0f 85 81 00 00 00 e8 0c 94 1f 00 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 68 96 1f 00 4d 85 e4 0f 85 8d 00 00 00 <e8> ea 93 1f 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00 RSP: 0018:ffffc9000009f6e8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000029 RCX: ffffffff81365f9e RDX: ffff888101698000 RSI: ffffffff81365fa8 RDI: 0000000000000007 RBP: 1ffff92000013edf R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000200 R14: ffff88810d331d40 R15: ffffc9000009f7b0 dev_vprintk_emit drivers/base/core.c:4942 [inline] dev_printk_emit+0xfb/0x140 drivers/base/core.c:4953 __dev_printk+0xf5/0x270 drivers/base/core.c:4965 _dev_info+0xe5/0x120 drivers/base/core.c:5011 usb_disconnect+0xec/0x920 drivers/usb/core/hub.c:2286 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5903 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> ---------------- Code disassembly (best guess): 0: 85 ed test %ebp,%ebp 2: 0f 85 81 00 00 00 jne 0x89 8: e8 0c 94 1f 00 call 0x1f9419 d: 9c pushf e: 41 5c pop %r12 10: 41 81 e4 00 02 00 00 and $0x200,%r12d 17: 31 ff xor %edi,%edi 19: 4c 89 e6 mov %r12,%rsi 1c: e8 68 96 1f 00 call 0x1f9689 21: 4d 85 e4 test %r12,%r12 24: 0f 85 8d 00 00 00 jne 0xb7 * 2a: e8 ea 93 1f 00 call 0x1f9419 <-- trapping instruction 2f: 45 31 c9 xor %r9d,%r9d 32: 41 b8 01 00 00 00 mov $0x1,%r8d 38: 31 c9 xor %ecx,%ecx 3a: 48 rex.W 3b: 8d .byte 0x8d 3c: 05 .byte 0x5 3d: 00 00 add %al,(%rax) --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
