bisecting fixing commit since 44db63d1ad8d71c6932cbe007eb41f31c434d140 building syzkaller on ae6bf8ddebd14f2e21c155c0bdf555b92d3eaf7a testing commit 44db63d1ad8d71c6932cbe007eb41f31c434d140 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: d6723132bfea4755609ad94851487651f4252a9b85cb3bc844fc89d904786f78 all runs: crashed: WARNING in cm109_urb_irq_callback/usb_submit_urb testing current HEAD ff1176468d368232b684f75e82563369208bc371 testing commit ff1176468d368232b684f75e82563369208bc371 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 9008eeafe96c013ec0e702c131dfacad88633c16affa8f5e275e5795478ca5e9 all runs: crashed: WARNING in cm109_urb_irq_callback/usb_submit_urb revisions tested: 2, total time: 20m40.318625798s (build: 13m1.281963392s, test: 7m2.35497381s) the crash still happens on HEAD commit msg: Linux 5.14-rc3 crash: WARNING in cm109_urb_irq_callback/usb_submit_urb cm109 1-1:0.0: cm109_urb_irq_callback: urb status -71 ------------[ cut here ]------------ URB 000000004e564723 submitted while active WARNING: CPU: 0 PID: 8843 at drivers/usb/core/urb.c:378 usb_submit_urb+0x1057/0x1680 drivers/usb/core/urb.c:378 Modules linked in: CPU: 0 PID: 8843 Comm: syz-executor.3 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usb_submit_urb+0x1057/0x1680 drivers/usb/core/urb.c:378 Code: 3d 12 9a 86 07 00 b8 f0 ff ff ff 0f 85 f7 fb ff ff 48 89 ee 48 c7 c7 80 fd 5f 89 89 04 24 c6 05 f3 99 86 07 01 e8 79 b5 3c 03 <0f> 0b 8b 04 24 e9 d4 fb ff ff b8 ed ff ff ff e9 ca fb ff ff 66 90 RSP: 0018:ffffc90000007a38 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff888033a56000 RCX: 0000000000000000 RDX: 0000000000000103 RSI: 0000000000000004 RDI: fffff52000000f39 RBP: ffff888010f69200 R08: 0000000000000001 R09: ffff8880b9e1fa5b R10: ffffed10173c3f4b R11: 3030303020425255 R12: ffff888017ef1bb8 R13: 0000000000000086 R14: 000000000000000f R15: ffff88804697a100 FS: 00000000022bb400(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc377f6960 CR3: 00000000183db000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cm109_urb_irq_callback+0x5de/0x970 drivers/input/misc/cm109.c:422 __usb_hcd_giveback_urb+0x238/0x3f0 drivers/usb/core/hcd.c:1656 dummy_timer+0xeb8/0x2eb0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x163/0x4a0 kernel/time/timer.c:1419 expire_timers kernel/time/timer.c:1464 [inline] __run_timers.part.0+0x524/0x8a0 kernel/time/timer.c:1732 __run_timers kernel/time/timer.c:1713 [inline] run_timer_softirq+0x9c/0x190 kernel/time/timer.c:1745 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:45 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:342 [inline] RIP: 0010:deref_stack_reg+0x4b/0x150 arch/x86/kernel/unwind_orc.c:352 Code: 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d7 00 00 00 41 8b 04 24 85 c0 74 62 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c3 00 00 00 49 8d 7c 24 10 RSP: 0018:ffffc9000177f330 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffffc9000177f478 RCX: 0000000000000000 RDX: 1ffff920002efe87 RSI: ffffc9000177f800 RDI: ffffc9000177f440 RBP: ffffc9000177f800 R08: ffffffff8cf92556 R09: 0000000000000001 R10: fffff520002efe92 R11: 000000000007a088 R12: ffffc9000177f438 R13: ffffc9000177f46d R14: ffffc9000177f438 R15: ffffc9000177f46c unwind_next_frame+0x13e0/0x1ce0 arch/x86/kernel/unwind_orc.c:587 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x84/0xa0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:2956 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x285/0x4a0 mm/slub.c:2969 ptlock_alloc+0x19/0x60 mm/memory.c:5458 ptlock_init include/linux/mm.h:2223 [inline] pgtable_pte_page_ctor include/linux/mm.h:2250 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:66 [inline] pte_alloc_one+0x4c/0x190 arch/x86/mm/pgtable.c:33 __pte_alloc+0x15/0x240 mm/memory.c:439 copy_pte_range mm/memory.c:1021 [inline] copy_pmd_range mm/memory.c:1156 [inline] copy_pud_range mm/memory.c:1193 [inline] copy_p4d_range mm/memory.c:1217 [inline] copy_page_range+0x1009/0x32b0 mm/memory.c:1290 dup_mmap kernel/fork.c:598 [inline] dup_mm+0x7c6/0x1090 kernel/fork.c:1379 copy_mm kernel/fork.c:1431 [inline] copy_process+0x66dc/0x6950 kernel/fork.c:2119 kernel_clone+0xb8/0x7f0 kernel/fork.c:2509 __do_sys_clone+0xaf/0xf0 kernel/fork.c:2626 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x464bcb Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00 RSP: 002b:00007ffc37709510 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000464bcb RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000022bb400 R10: 00000000022bb6d0 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc37709600