================================================================== BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:243 [inline] BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:189 [inline] BUG: KASAN: slab-out-of-bounds in sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110 Read of size 8 at addr ffff8801cb60d140 by task syzkaller454024/4062 CPU: 1 PID: 4062 Comm: syzkaller454024 Not tainted 4.9.78-g7be1985 #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d45d79b0 ffffffff81d94409 ffffea00072d8340 ffff8801cb60d140 0000000000000000 ffff8801cb60d140 ffff8801d30d8238 ffff8801d45d79e8 ffffffff8153dc73 ffff8801cb60d140 0000000000000008 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x73/0x280 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report+0x275/0x360 mm/kasan/report.c:408 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429 [] __read_once_size include/linux/compiler.h:243 [inline] [] list_empty include/linux/list.h:189 [inline] [] sg_remove_request+0x103/0x120 drivers/scsi/sg.c:2110 [] sg_finish_rem_req+0x295/0x340 drivers/scsi/sg.c:1827 [] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526 [] 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+0x29/0xe8 Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801cb60d100 which belongs to the cache fasync_cache of size 96 The buggy address is located 64 bytes inside of 96-byte region [ffff8801cb60d100, ffff8801cb60d160) The buggy address belongs to the page: page:ffffea00072d8340 count:1 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000080(slab) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cb60d000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff8801cb60d080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801cb60d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801cb60d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cb60d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================