kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access[ 58.949484] BUG: spinlock bad magic on CPU#1, syz-executor0/8934 lock: 0xffff8801ceb38018, .magic: dead4eac, .owner: /-1, .owner_cpu: -1 CPU: 1 PID: 8934 Comm: syz-executor0 Not tainted 4.4.110-gd891a62 #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 23387bf9b2d1e90e ffff8801d723f870 ffffffff81d04e3d ffff8801ceb38018 ffff8801d5048000 dffffc0000000000 ffff8801d723fbe0 ffff8801d723fc10 ffff8801d723f8b0 ffffffff812459fd ffff880100000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 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+0x228/0x2c0 kernel/locking/spinlock_debug.c:135 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] free_poll_entry fs/select.c:132 [inline] [] poll_freewait+0xd2/0x250 fs/select.c:141 [] do_sys_poll+0x685/0xd70 fs/select.c:912 [] SYSC_poll fs/select.c:969 [inline] [] SyS_poll+0x120/0x3f0 fs/select.c:957 [] entry_SYSCALL_64_fastpath+0x16/0x92 general protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 8944 Comm: syz-executor0 Not tainted 4.4.110-gd891a62 #19 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d7e3df00 task.stack: ffff8800ba308000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:[] [] put_page_testzero include/linux/mm.h:357 [inline] RIP: 0010:[] [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP: 0018:ffff8800ba30f9f0 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c RBP: ffff8800ba30fa00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000020 R14: ffff8800b9c84200 R15: dffffc0000000000 FS: 00007f16c3d80700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb23ef74db8 CR3: 00000001d9068000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000000 ffff8800b9c84358 ffff8800ba30fa60 ffffffff825b9c81 ffff8800b9c84370 ffffed001739086b ffffed001739086e ffff8800b9c84368 dead4ead00000000 ffff8800b9c84340 0000000000000000 0000000000000000 Call Trace: [] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1964 [] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1846 [] sg_new_read.isra.18+0x39/0x3c0 drivers/scsi/sg.c:578 [] sg_read+0x8c2/0x1490 drivers/scsi/sg.c:467 [] ? 0xffffffff810002b8 [] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680 [] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810 [] vfs_readv+0x78/0xb0 fs/read_write.c:834 [] SYSC_readv fs/read_write.c:860 [inline] [] SyS_readv+0xd9/0x240 fs/read_write.c:852 [] entry_SYSCALL_64_fastpath+0x16/0x92 Code: 96 a4 0c 00 e9 78 fd ff ff 90 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 49 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP [] put_page_testzero include/linux/mm.h:357 [inline] RIP [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP ---[ end trace f1944cfd860033b2 ]---