Hello, syzbot found the following issue on: HEAD commit: 237d4e0f4113 usb: typec: tcpm: Add support for sink-bc12-c.. 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=114e76e8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=358c1689354aeef3 dashboard link: https://syzkaller.appspot.com/bug?extid=faf3a6cf579fc65591ca compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1d16b8e77d72/disk-237d4e0f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9636263bfc8f/vmlinux-237d4e0f.xz kernel image: https://storage.googleapis.com/syzbot-assets/36d0ba4d90fb/bzImage-237d4e0f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+faf3a6cf579fc65591ca@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0xdffffc0000000040: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000200-0x0000000000000207] CPU: 1 UID: 0 PID: 13433 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:266 Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 0f b6 6b ff 4c 8d 66 01 48 89 f0 48 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0 RSP: 0018:ffffc900001b8850 EFLAGS: 00010046 RAX: 0000000000000040 RBX: ffffffff8746fac1 RCX: ffffffff8fb08b60 RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff8746fac0 RBP: 0000000000000066 R08: 0000000000000001 R09: dffffc0000000000 R10: ffffffff8fb08b70 R11: ffffffff8fb08b60 R12: 0000000000000201 R13: dffffc0000000000 R14: 00000000000001f2 R15: ffffffff934a7980 FS: 0000555591f43500(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c30aef3 CR3: 00000001166a8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> count_matching_names kernel/locking/lockdep.c:875 [inline] register_lock_class+0x63b/0x1240 kernel/locking/lockdep.c:1340 __lock_acquire+0x135/0x3ce0 kernel/locking/lockdep.c:5077 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 complete_with_flags kernel/sched/completion.c:20 [inline] complete+0x1d/0x200 kernel/sched/completion.c:47 transfer drivers/usb/gadget/udc/dummy_hcd.c:1522 [inline] dummy_timer+0x1c04/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1977 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1772 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:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5790 Code: b8 ff ff ff ff 65 0f c1 05 90 1f cf 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffffc9001499f500 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 1ffff92002933ea1 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff8727f520 RDI: ffffffff8746ec80 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff1f559b4 R10: ffffffff8faacda7 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88ebb140 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] page_ext_get+0x3a/0x310 mm/page_ext.c:525 page_table_check_set mm/page_table_check.c:114 [inline] page_table_check_set+0x285/0x9c0 mm/page_table_check.c:102 __page_table_check_ptes_set+0x44c/0x710 mm/page_table_check.c:225 page_table_check_ptes_set include/linux/page_table_check.h:74 [inline] set_ptes include/linux/pgtable.h:267 [inline] __copy_present_ptes mm/memory.c:969 [inline] copy_present_ptes+0xc03/0x3540 mm/memory.c:1052 copy_pte_range mm/memory.c:1167 [inline] copy_pmd_range mm/memory.c:1255 [inline] copy_pud_range mm/memory.c:1292 [inline] copy_p4d_range mm/memory.c:1316 [inline] copy_page_range+0xbd7/0x2420 mm/memory.c:1414 dup_mmap kernel/fork.c:746 [inline] dup_mm kernel/fork.c:1675 [inline] copy_mm kernel/fork.c:1724 [inline] copy_process+0x8236/0x91e0 kernel/fork.c:2374 kernel_clone+0xfd/0x960 kernel/fork.c:2786 __do_sys_clone+0xba/0x100 kernel/fork.c:2929 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff90ac55093 Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc36e1b4e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff90ac55093 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000555591f437d0 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000001091bd R14: 0000000000108c37 R15: 00007ffc36e1b670 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strcmp+0x5b/0xb0 lib/string.c:266 Code: fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 04 84 c0 75 58 0f b6 6b ff 4c 8d 66 01 48 89 f0 48 89 f2 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 2c 41 3a 6c 24 ff 74 ae 19 c0 RSP: 0018:ffffc900001b8850 EFLAGS: 00010046 RAX: 0000000000000040 RBX: ffffffff8746fac1 RCX: ffffffff8fb08b60 RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff8746fac0 RBP: 0000000000000066 R08: 0000000000000001 R09: dffffc0000000000 R10: ffffffff8fb08b70 R11: ffffffff8fb08b60 R12: 0000000000000201 R13: dffffc0000000000 R14: 00000000000001f2 R15: ffffffff934a7980 FS: 0000555591f43500(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c30aef3 CR3: 00000001166a8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fa cli 1: 48 c1 e8 03 shr $0x3,%rax 5: 83 e2 07 and $0x7,%edx 8: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax d: 38 d0 cmp %dl,%al f: 7f 04 jg 0x15 11: 84 c0 test %al,%al 13: 75 58 jne 0x6d 15: 0f b6 6b ff movzbl -0x1(%rbx),%ebp 19: 4c 8d 66 01 lea 0x1(%rsi),%r12 1d: 48 89 f0 mov %rsi,%rax 20: 48 89 f2 mov %rsi,%rdx 23: 48 c1 e8 03 shr $0x3,%rax 27: 83 e2 07 and $0x7,%edx * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 38 d0 cmp %dl,%al 31: 7f 04 jg 0x37 33: 84 c0 test %al,%al 35: 75 2c jne 0x63 37: 41 3a 6c 24 ff cmp -0x1(%r12),%bpl 3c: 74 ae je 0xffffffec 3e: 19 c0 sbb %eax,%eax --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
