==================================== WARNING: syz-executor0/12256 still has locks held! ------------[ cut here ]------------ ------------[ cut here ]------------ downgrading a read lock WARNING: CPU: 1 PID: 12258 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline] WARNING: CPU: 1 PID: 12258 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819 downgrading a read lock WARNING: CPU: 0 PID: 12257 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline] WARNING: CPU: 0 PID: 12257 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819 Kernel panic - not syncing: panic_on_warn set ... Modules linked in: CPU: 1 PID: 12258 Comm: modprobe Not tainted 4.20.0-rc5+ #142 CPU: 0 PID: 12257 Comm: blkid Not tainted 4.20.0-rc5+ #142 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: RIP: 0010:__lock_downgrade kernel/locking/lockdep.c:3556 [inline] RIP: 0010:lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 Code: 00 00 fc ff df 41 c6 44 05 00 f8 e9 1b ff ff ff 48 c7 c7 a0 6d 2b 88 4c 89 9d 58 ff ff ff 48 89 85 60 ff ff ff e8 69 1f e7 ff <0f> 0b 48 8b 85 60 ff ff ff 4c 8d 4d d8 4c 89 e9 48 ba 00 00 00 00 RSP: 0018:ffff88817ffdfb70 EFLAGS: 00010086 panic+0x2ad/0x55c kernel/panic.c:188 RAX: 0000000000000000 RBX: 1ffff1102fffbf74 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8165fbe5 RDI: 0000000000000006 RBP: ffff88817ffdfc28 R08: ffff8881827e2580 R09: fffffbfff12b2314 R10: fffffbfff12b2314 R11: ffffffff895918a3 R12: ffffffff8b0f87e0 R13: ffff88817ffdfbc0 R14: 0000000000000002 R15: ffff8881827e2580 __warn.cold.8+0x20/0x45 kernel/panic.c:540 FS: 00007f43e39f0740(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 report_bug+0x254/0x2d0 lib/bug.c:186 CR2: 00007f43e37d7000 CR3: 0000000182d61000 CR4: 00000000001406f0 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:__lock_downgrade kernel/locking/lockdep.c:3556 [inline] RIP: 0010:lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819 Code: 00 00 fc ff df 41 c6 44 05 00 f8 e9 1b ff ff ff 48 c7 c7 a0 6d 2b 88 4c 89 9d 58 ff ff ff 48 89 85 60 ff ff ff e8 69 1f e7 ff <0f> 0b 48 8b 85 60 ff ff ff 4c 8d 4d d8 4c 89 e9 48 ba 00 00 00 00 RSP: 0018:ffff88817ac97b70 EFLAGS: 00010086 downgrade_write+0x76/0x270 kernel/locking/rwsem.c:147 RAX: 0000000000000000 RBX: 1ffff1102f592f74 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8165fbe5 RDI: 0000000000000006 RBP: ffff88817ac97c28 R08: ffff8881afbac540 R09: fffffbfff12b2314 R10: fffffbfff12b2314 R11: ffffffff895918a3 R12: ffffffff8b0f87e0 R13: ffff88817ac97bc0 R14: 0000000000000001 R15: ffff8881afbac540 __do_munmap+0xcd8/0xf80 mm/mmap.c:2812 __vm_munmap+0x138/0x1f0 mm/mmap.c:2837 downgrade_write+0x76/0x270 kernel/locking/rwsem.c:147 __do_sys_munmap mm/mmap.c:2862 [inline] __se_sys_munmap mm/mmap.c:2859 [inline] __x64_sys_munmap+0x65/0x80 mm/mmap.c:2859 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 __do_munmap+0xcd8/0xf80 mm/mmap.c:2812 __vm_munmap+0x138/0x1f0 mm/mmap.c:2837 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f43e37f0417 __do_sys_munmap mm/mmap.c:2862 [inline] __se_sys_munmap mm/mmap.c:2859 [inline] __x64_sys_munmap+0x65/0x80 mm/mmap.c:2859 Code: f0 ff ff 73 01 c3 48 8d 0d 8a ad 20 00 31 d2 48 29 c2 89 11 48 83 c8 ff eb eb 90 90 90 90 90 90 90 90 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 5d ad 20 00 31 d2 48 29 c2 89 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 RSP: 002b:00007ffe6ad1fc48 EFLAGS: 00000203 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 00007f43e39fb1c8 RCX: 00007f43e37f0417 RDX: 00000000032fe800 RSI: 00000000000033ef RDI: 00007f43e39f3000 RBP: 00007ffe6ad1fdb0 R08: 0000000000000001 R09: 0000000000000007 R10: 00007f43e37eaa0b R11: 0000000000000203 R12: 00000000cc83869a R13: 000000c9cc83869a R14: 000000c9c955a441 R15: 00007f43e39f0740 irq event stamp: 1986 entry_SYSCALL_64_after_hwframe+0x49/0xbe hardirqs last enabled at (1985): [] preempt_schedule_irq+0x90/0x140 kernel/sched/core.c:3698 RIP: 0033:0x7f73053b7417 hardirqs last disabled at (1986): [] __schedule+0x21e/0x21d0 kernel/sched/core.c:3399 Code: f0 ff ff 73 01 c3 48 8d 0d 8a ad 20 00 31 d2 48 29 c2 89 11 48 83 c8 ff eb eb 90 90 90 90 90 90 90 90 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 5d ad 20 00 31 d2 48 29 c2 89 softirqs last enabled at (1984): [] __do_softirq+0x7df/0xb7e kernel/softirq.c:319 RSP: 002b:00007ffd3724dee8 EFLAGS: 00000203 ORIG_RAX: 000000000000000b softirqs last disabled at (1897): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (1897): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 RAX: ffffffffffffffda RBX: 00007f73055c21c8 RCX: 00007f73053b7417 ---[ end trace 8528034e1a25735f ]--- RDX: 00000000003f1f00 RSI: 00000000000033ef RDI: 00007f73055ba000 4.20.0-rc5+ #142 Tainted: G W RBP: 00007ffd3724e050 R08: 0000000000000001 R09: 0000000000000007 R10: 00007f73053b1a0b R11: 0000000000000203 R12: 00000000cbf3ad95 R13: 000000c9cbf3ad95 R14: 000000c9cbb85323 R15: 00007f73055b8700 Kernel Offset: disabled Rebooting in 86400 seconds..