================================================================== BUG: KASAN: slab-out-of-bounds in dtInsertEntry.isra.0+0x12df/0x15d0 fs/jfs/jfs_dtree.c:3977 Read of size 1 at addr ffff88803a3465a8 by task syz-executor.4/30987 CPU: 0 PID: 30987 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430 dtInsertEntry.isra.0+0x12df/0x15d0 fs/jfs/jfs_dtree.c:3977 dtInsert+0x4c2/0xa00 fs/jfs/jfs_dtree.c:899 jfs_create.part.0+0x3c6/0x880 fs/jfs/namei.c:150 jfs_create+0x3f/0x60 fs/jfs/namei.c:90 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f86726335a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 FAT-fs (loop5): bogus number of reserved sectors RSP: 002b:00007f8670fa7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f8672754f80 RCX: 00007f86726335a9 RDX: 000000000000275a RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 00007f867268e580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd60dc0f5f R14: 00007f8670fa7300 R15: 0000000000022000 Allocated by task 30987: kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 jfs_alloc_inode+0x18/0x50 fs/jfs/super.c:118 alloc_inode+0x5d/0x180 fs/inode.c:211 new_inode_pseudo fs/inode.c:911 [inline] new_inode+0x1d/0xf0 fs/inode.c:940 ialloc+0x4f/0x970 fs/jfs/jfs_inode.c:61 jfs_create.part.0+0x12b/0x880 fs/jfs/namei.c:105 jfs_create+0x3f/0x60 fs/jfs/namei.c:90 FAT-fs (loop5): Can't find a valid FAT filesystem lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 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 ffff88803a3465c0 which belongs to the cache jfs_ip of size 1944 audit: type=1800 audit(1664741453.497:182): pid=31019 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="file0" dev="sda1" ino=15612 res=0 The buggy address is located 24 bytes to the left of 1944-byte region [ffff88803a3465c0, ffff88803a346d58) The buggy address belongs to the page: page:ffffea0000e8d180 count:1 mapcount:0 mapping:ffff888239793c80 index:0xffff88803a346fff flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0000e8d148 ffff8880b0eecc48 ffff888239793c80 raw: ffff88803a346fff ffff88803a3465c0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88803a346480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803a346500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803a346580: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ audit: type=1804 audit(1664741453.497:183): pid=31019 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3929931700/syzkaller.K2oTf5/545/file0" dev="sda1" ino=15612 res=1 ffff88803a346600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803a346680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================