Hello, syzbot found the following crash on: HEAD commit: b791d1bd Merge tag 'locking-kcsan-2020-06-11' of git://git.. 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=1522cc25100000 kernel config: https://syzkaller.appspot.com/x/.config?x=16c2467d4b6dbee2 dashboard link: https://syzkaller.appspot.com/bug?extid=4d2d56175b934b9a7bf9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4d2d56175b934b9a7bf9@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 0 PID: 355 Comm: syz-executor.2 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf6/0x16e lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:894 [inline] register_lock_class+0x1442/0x17e0 kernel/locking/lockdep.c:1206 __lock_acquire+0x101/0x6270 kernel/locking/lockdep.c:4259 lock_acquire+0x18b/0x7c0 kernel/locking/lockdep.c:4959 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x32/0x50 kernel/locking/spinlock.c:159 ath9k_htc_rxep+0x31/0x210 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:1128 ath9k_htc_rx_msg+0x2d9/0xb00 drivers/net/wireless/ath/ath9k/htc_hst.c:459 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:638 [inline] ath9k_hif_usb_rx_cb+0xc76/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1967 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x5e5/0x14c0 kernel/time/timer.c:1786 __do_softirq+0x21e/0x996 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1107 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x3b/0x40 kernel/locking/spinlock.c:191 Code: e8 1a 69 8d fb 48 89 ef e8 42 5d 8e fb f6 c7 02 75 11 53 9d e8 26 e6 ab fb 65 ff 0d 57 e4 68 7a 5b 5d c3 e8 e7 de ab fb 53 9d <eb> ed 0f 1f 00 55 48 89 fd 65 ff 05 3d e4 68 7a 45 31 c9 41 b8 01 RSP: 0018:ffff8881ae06fba0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000246 RCX: 1ffffffff0fd4d4a RDX: 1ffff11039bbe747 RSI: 0000000000000000 RDI: ffff8881cddf3a38 RBP: ffff8881db228400 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881db228480 R14: ffff8881ae06fdf8 R15: ffff8881db228400 unlock_hrtimer_base kernel/time/hrtimer.c:898 [inline] hrtimer_start_range_ns+0x5cd/0xb50 kernel/time/hrtimer.c:1136 hrtimer_start_expires include/linux/hrtimer.h:435 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1800 [inline] do_nanosleep+0x1b9/0x650 kernel/time/hrtimer.c:1876 hrtimer_nanosleep+0x1df/0x3a0 kernel/time/hrtimer.c:1932 __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline] __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1953 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45af70 Code: Bad RIP value. RSP: 002b:00007fff27bba8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000009722e RCX: 000000000045af70 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff27bba8f0 RBP: 00000000000001de R08: 0000000000000001 R09: 0000000001410940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff27bba940 R14: 000000000009722e R15: 00007fff27bba950 BUG: unable to handle page fault for address: ffffffffffffffc8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 7026067 P4D 7026067 PUD 7028067 PMD 0 Oops: 0000 [#1] SMP KASAN CPU: 0 PID: 355 Comm: syz-executor.2 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ath9k_htc_rxep+0xb5/0x210 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:1130 Code: 8b 43 38 48 8d 58 c8 49 39 c4 0f 84 ee 00 00 00 e8 90 fd 61 fe 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 74 06 0f 8e 0a 01 00 00 <44> 0f b6 3b 31 ff 44 89 fe e8 cd fe 61 fe 45 84 ff 75 a8 e8 63 fd RSP: 0018:ffff8881db209870 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffffffffc8 RCX: ffffc900004a7000 RDX: 0000000000040000 RSI: ffffffff82ddb320 RDI: ffff8881db2097e0 RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffed103b6412fd R10: 0000000000000003 R11: ffffed103b6412fc R12: ffff8881ac34b4d8 R13: ffff8881ac34b0a0 R14: ffff8881ac34b4e8 R15: ffffed10392efc10 FS: 0000000001410940(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffc8 CR3: 00000001ae02b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> ath9k_htc_rx_msg+0x2d9/0xb00 drivers/net/wireless/ath/ath9k/htc_hst.c:459 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:638 [inline] ath9k_hif_usb_rx_cb+0xc76/0x1050 drivers/net/wireless/ath/ath9k/hif_usb.c:671 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 dummy_timer+0x125e/0x32b4 drivers/usb/gadget/udc/dummy_hcd.c:1967 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x5e5/0x14c0 kernel/time/timer.c:1786 __do_softirq+0x21e/0x996 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1107 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x3b/0x40 kernel/locking/spinlock.c:191 Code: e8 1a 69 8d fb 48 89 ef e8 42 5d 8e fb f6 c7 02 75 11 53 9d e8 26 e6 ab fb 65 ff 0d 57 e4 68 7a 5b 5d c3 e8 e7 de ab fb 53 9d <eb> ed 0f 1f 00 55 48 89 fd 65 ff 05 3d e4 68 7a 45 31 c9 41 b8 01 RSP: 0018:ffff8881ae06fba0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000246 RCX: 1ffffffff0fd4d4a RDX: 1ffff11039bbe747 RSI: 0000000000000000 RDI: ffff8881cddf3a38 RBP: ffff8881db228400 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881db228480 R14: ffff8881ae06fdf8 R15: ffff8881db228400 unlock_hrtimer_base kernel/time/hrtimer.c:898 [inline] hrtimer_start_range_ns+0x5cd/0xb50 kernel/time/hrtimer.c:1136 hrtimer_start_expires include/linux/hrtimer.h:435 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1800 [inline] do_nanosleep+0x1b9/0x650 kernel/time/hrtimer.c:1876 hrtimer_nanosleep+0x1df/0x3a0 kernel/time/hrtimer.c:1932 __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline] __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1953 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45af70 Code: Bad RIP value. RSP: 002b:00007fff27bba8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000009722e RCX: 000000000045af70 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff27bba8f0 RBP: 00000000000001de R08: 0000000000000001 R09: 0000000001410940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff27bba940 R14: 000000000009722e R15: 00007fff27bba950 Modules linked in: CR2: ffffffffffffffc8 ---[ end trace 4488f3a2c836a427 ]--- RIP: 0010:ath9k_htc_rxep+0xb5/0x210 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:1130 Code: 8b 43 38 48 8d 58 c8 49 39 c4 0f 84 ee 00 00 00 e8 90 fd 61 fe 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 74 06 0f 8e 0a 01 00 00 <44> 0f b6 3b 31 ff 44 89 fe e8 cd fe 61 fe 45 84 ff 75 a8 e8 63 fd RSP: 0018:ffff8881db209870 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffffffffc8 RCX: ffffc900004a7000 RDX: 0000000000040000 RSI: ffffffff82ddb320 RDI: ffff8881db2097e0 RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffed103b6412fd R10: 0000000000000003 R11: ffffed103b6412fc R12: ffff8881ac34b4d8 R13: ffff8881ac34b0a0 R14: ffff8881ac34b4e8 R15: ffffed10392efc10 FS: 0000000001410940(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffc8 CR3: 00000001ae02b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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