kasan: GPF could be caused by NULL-ptr deref or user memory access BUG: spinlock bad magic on CPU#0, syz-executor4/12641 lock: 0xffff8801c9544218, .magic: dead4eac, .owner: /-1, .owner_cpu: -1 CPU: 0 PID: 12641 Comm: syz-executor4 Not tainted 4.9.80-g8a174b47 #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801db207898 ffffffff81d94be9 ffff8801c9544218 ffff8801cab79800 0000000000000001 0000000000000001 0000000000000000 ffff8801db2078d8 ffffffff8124897d ffffffff81223cbe 0000000000000000 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67 [] spin_bug kernel/locking/spinlock_debug.c:75 [inline] [] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] [] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] __wake_up+0x1e/0x50 kernel/sched/wait.c:94 [] sg_rq_end_io+0x5dc/0xbc0 drivers/scsi/sg.c:1375 [] __blk_mq_end_request+0x54/0xc0 block/blk-mq.c:331 [] scsi_end_request+0x135/0x5c0 drivers/scsi/scsi_lib.c:627 [] scsi_io_completion+0x15de/0x1730 drivers/scsi/scsi_lib.c:829 [] scsi_finish_command+0x3b8/0x530 drivers/scsi/scsi.c:607 [] scsi_softirq_done+0x250/0x350 drivers/scsi/scsi_lib.c:1567 [] blk_mq_ipi_complete_request block/blk-mq.c:376 [inline] [] __blk_mq_complete_request+0x205/0x4b0 block/blk-mq.c:388 [] blk_mq_complete_request+0x65/0x80 block/blk-mq.c:407 [] scsi_mq_done+0xce/0x320 drivers/scsi/scsi_lib.c:1877 [] virtscsi_complete_cmd+0x5cf/0x7f0 drivers/scsi/virtio_scsi.c:211 [] virtscsi_vq_done+0xc9/0x170 drivers/scsi/virtio_scsi.c:229 [] virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:244 [] vring_interrupt+0x109/0x150 drivers/virtio/virtio_ring.c:909 [] __handle_irq_event_percpu+0xef/0x800 kernel/irq/handle.c:145 [] handle_irq_event_percpu+0x74/0x150 kernel/irq/handle.c:185 [] handle_irq_event+0xa7/0x140 kernel/irq/handle.c:202 [] handle_edge_irq+0x1fa/0x8e0 kernel/irq/chip.c:665 [] generic_handle_irq_desc include/linux/irqdesc.h:150 [inline] [] handle_irq+0x24e/0x3b0 arch/x86/kernel/irq_64.c:76 [] do_IRQ+0x89/0x1b0 arch/x86/kernel/irq.c:239 [] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:565 [] vma_adjust include/linux/mm.h:1952 [inline] [] __split_vma.isra.40+0x52d/0x670 mm/mmap.c:2592 [] split_vma+0x8a/0xc0 mm/mmap.c:2621 [] mprotect_fixup+0x423/0x660 mm/mprotect.c:322 [] do_mprotect_pkey+0x546/0x860 mm/mprotect.c:460 [] SYSC_mprotect mm/mprotect.c:485 [inline] [] SyS_mprotect+0x2a/0x40 mm/mprotect.c:482 [] entry_SYSCALL_64_fastpath+0x29/0xe8 audit: type=1400 audit(1518457843.007:56): avc: denied { write } for pid=12648 comm="syz-executor6" name="net" dev="proc" ino=27432 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518457843.007:57): avc: denied { add_name } for pid=12648 comm="syz-executor6" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518457843.017:58): avc: denied { create } for pid=12648 comm="syz-executor6" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:insmod_t:s0 tclass=file permissive=1 general protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 12632 Comm: syz-executor0 Not tainted 4.9.80-g8a174b47 #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801caac6000 task.stack: ffff8801c9498000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:243 [inline] RIP: 0010:[] [] atomic_read arch/x86/include/asm/atomic.h:26 [inline] RIP: 0010:[] [] page_ref_count include/linux/page_ref.h:66 [inline] RIP: 0010:[] [] put_page_testzero include/linux/mm.h:450 [inline] RIP: 0010:[] [] __free_pages+0x21/0x80 mm/page_alloc.c:3897 RSP: 0018:ffff8801c949fab0 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826680eb RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c RBP: ffff8801c949fac0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8801caac6000 R12: 0000000000000004 R13: 0000000000000020 R14: ffff8801cb52a100 R15: dffffc0000000000 FS: 00007f771b1af700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000071c000 CR3: 00000001d3ba0000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff838b4029 ffff8801cb52a258 ffff8801c949fb20 ffffffff82668111 ffff8801cb52a270 ffffed00396a544b ffffed00396a544e ffff8801cb52a268 dead4ead00000000 ffff8801cb52a240 0000000000000000 0000000000000000 Call Trace: [] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944 [] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825 [] sg_new_read.isra.20+0x356/0x3e0 drivers/scsi/sg.c:566 [] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x29/0xe8 Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d RIP [] __read_once_size include/linux/compiler.h:243 [inline] RIP [] atomic_read arch/x86/include/asm/atomic.h:26 [inline] RIP [] page_ref_count include/linux/page_ref.h:66 [inline] RIP [] put_page_testzero include/linux/mm.h:450 [inline] RIP [] __free_pages+0x21/0x80 mm/page_alloc.c:3897 RSP ---[ end trace 94c233c88b6dccbb ]---