netlink: 17 bytes leftover after parsing attributes in process `syz-executor0'. ================================================================== BUG: KASAN: wild-memory-access on address ffe708745170d000 Read of size 37 by task syz-executor2/3781 CPU: 0 PID: 3781 Comm: syz-executor2 Not tainted 4.9.53-g2b3a26c #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 netlink: 17 bytes leftover after parsing attributes in process `syz-executor0'. ffff8801a72bfae8 ffffffff81d93789 ffe708745170d000 0000000000000025 0000000000000000 ffff8801a7235d20 ffe708745170d000 ffff8801a72bfb70 ffffffff8153d48f 0000000000000000 0000000000000001 ffffffff826650bb 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 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x107/0x330 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+0x23/0xc6 ================================================================== SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3803 sclass=netlink_route_socket pig=3852 comm=syz-executor4 binder: 3859:3860 ioctl 5405 2034d000 returned -22 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3803 sclass=netlink_route_socket pig=3852 comm=syz-executor4 binder: 3859:3870 ioctl 5405 2034d000 returned -22 capability: warning: `syz-executor4' uses deprecated v2 capabilities in a way that may be insecure IPVS: Creating netns size=2536 id=9 device gre0 entered promiscuous mode pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) mmap: syz-executor1 (4040) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. pktgen: Initialization failed for all threads pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'. capability: warning: `syz-executor4' uses 32-bit capabilities (legacy support in use) netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'. 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: 4322 Comm: syz-executor3 Tainted: G B 4.9.53-g2b3a26c #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801ce678000 task.stack: ffff8801ce400000 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:445 [inline] RIP: 0010:[] [] __free_pages+0x21/0x80 mm/page_alloc.c:3901 RSP: 0018:ffff8801ce407ab0 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc90002eeb000 RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c RBP: ffff8801ce407ac0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 1ffff10039c80f38 R12: 0000000000000004 R13: 0000000000000020 R14: ffff8801d1988000 R15: dffffc0000000000 FS: 00007fa50fe1c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe25d847000 CR3: 00000001d1c4e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801ce678000 ffff8801d1988158 ffff8801ce407b20 ffffffff826626b1 ffff8801d1988170 ffffed003a33102b ffffed003a33102e ffff8801d1988168 dead4ead00000000 ffff8801d1988140 0000000000000000 0000000000000000 Call Trace: [] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954 [] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836 [] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567 [] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x107/0x330 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+0x23/0xc6 Code: ff 66 0f 1f 84 00 00 00 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:445 [inline] RIP [] __free_pages+0x21/0x80 mm/page_alloc.c:3901 RSP ---[ end trace af05804064ac6762 ]---