F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): Fix alignment : done, start(4096) end(147456) block(12288) F2FS-fs (loop0): invalid crc value ================================================================== BUG: KASAN: slab-out-of-bounds in init_min_max_mtime fs/f2fs/segment.c:4161 [inline] BUG: KASAN: slab-out-of-bounds in f2fs_build_segment_manager+0x8ed7/0xa980 fs/f2fs/segment.c:4243 Read of size 8 at addr ffff8880a3b31ba8 by task syz-executor250/6503 CPU: 0 PID: 6503 Comm: syz-executor250 Not tainted 4.19.150-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 print_address_description.cold+0x56/0x25c mm/kasan/report.c:256 kasan_report_error.cold+0x66/0xb9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 init_min_max_mtime fs/f2fs/segment.c:4161 [inline] f2fs_build_segment_manager+0x8ed7/0xa980 fs/f2fs/segment.c:4243 f2fs_fill_super+0x2173/0x7920 fs/f2fs/super.c:3016 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446ffa Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc8ced3aa8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc8ced3b00 RCX: 0000000000446ffa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc8ced3ac0 RBP: 00007ffc8ced3ac0 R08: 00007ffc8ced3b00 R09: 00007ffc00000015 R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000008 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Allocated by task 6503: __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node+0x4c/0x70 mm/slab.c:3696 kmalloc_node include/linux/slab.h:557 [inline] kvmalloc_node+0x61/0xf0 mm/util.c:423 kvmalloc include/linux/mm.h:577 [inline] f2fs_kvmalloc fs/f2fs/f2fs.h:2687 [inline] f2fs_kvzalloc fs/f2fs/f2fs.h:2693 [inline] build_sit_info fs/f2fs/segment.c:3768 [inline] f2fs_build_segment_manager+0xd2e/0xa980 fs/f2fs/segment.c:4219 f2fs_fill_super+0x2173/0x7920 fs/f2fs/super.c:3016 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8880a3b31700 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 1192 bytes inside of 2048-byte region [ffff8880a3b31700, ffff8880a3b31f00) The buggy address belongs to the page: page:ffffea00028ecc00 count:1 mapcount:0 mapping:ffff88812c3f6c40 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea0002588888 ffff88812c3f4948 ffff88812c3f6c40 raw: 0000000000000000 ffff8880a3b30600 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a3b31a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a3b31b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a3b31b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a3b31c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a3b31c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================