================================================================== BUG: KASAN: wild-memory-access on address ffe708746f267000 Read of size 8 by task syz-executor4/6787 CPU: 1 PID: 6787 Comm: syz-executor4 Not tainted 4.9.52-g9b2b081 #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801aba079e8 ffffffff81d93149 ffe708746f267000 0000000000000008 0000000000000000 ffff8801aa6096c0 ffe708746f267000 ffff8801aba07a70 ffffffff8153d08f 0000000000000000 0000000000000001 ffffffff826648db Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_report_error mm/kasan/report.c:284 [inline] [] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309 [] kasan_report+0x20/0x30 mm/kasan/report.c:296 [] check_memory_region_inline mm/kasan/kasan.c:308 [inline] [] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315 [] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320 [] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline] [] sg_read_oxfer drivers/scsi/sg.c:1978 [inline] [] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520 [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_readv+0xe6/0x250 fs/read_write.c:924 [] SYSC_readv fs/read_write.c:1011 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1008 [] entry_SYSCALL_64_fastpath+0x23/0xc6 ================================================================== sg_write: data in/out 8938/38 bytes for SCSI command 0x0-- guessing data in; program syz-executor4 not setting count and/or reply_len properly kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6787 Comm: syz-executor4 Tainted: G B 4.9.52-g9b2b081 #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c75ac800 task.stack: ffff8801aba00000 RIP: 0010:[] [] sg_read_oxfer drivers/scsi/sg.c:1976 [inline] RIP: 0010:[] [] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520 RSP: 0018:ffff8801aba07ac0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90003209000 RDX: 0000000000000000 RSI: 0000000000000009 RDI: ffff8801c71d4370 RBP: ffff8801aba07bc8 R08: 0000000000000000 R09: ffffed00354c13cd R10: 0000000000000005 R11: ffffed00354c13cc R12: 0000000000001000 R13: 0000000000000000 R14: ffff8801aa609e40 R15: ffff8801c71d4340 FS: 00007fd42023a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020476000 CR3: 00000001c65cd000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffea0006ae81c0 ffff8801aba07b18 ffff8801c71d4358 0000000000000009 ffff8801aba07da0 ffff8801c71d4368 000000000000002d 0000000000000246 ffff8801d1bc9900 1ffff10035740f64 0000000020476000 0000000020476024 Call Trace: [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_readv+0xe6/0x250 fs/read_write.c:924 [] SYSC_readv fs/read_write.c:1011 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1008 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 19 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 06 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 RIP [] sg_read_oxfer drivers/scsi/sg.c:1976 [inline] RIP [] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520 RSP ---[ end trace 76ebbbd22d8bc72f ]---