REISERFS (device loop3): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. BFS-fs: bfs_fill_super(): loop5 is unclean, continuing ================================================================== BUG: KASAN: slab-out-of-bounds in find_first_zero_bit+0xa8/0xb0 lib/find_bit.c:125 Read of size 8 at addr ffff88809a64f980 by task syz-executor.5/21242 CPU: 1 PID: 21242 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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 REISERFS (device loop1): using ordered data mode kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 find_first_zero_bit+0xa8/0xb0 lib/find_bit.c:125 bfs_create+0xfb/0x610 fs/bfs/dir.c:91 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 reiserfs: using flush barriers 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: 0033:0x7f254e4ae0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 RSP: 002b:00007f254ca20168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f254e5cdf80 RCX: 00007f254e4ae0f9 REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 RDX: 0000000000000000 RSI: 0000000000181c40 RDI: 0000000020000100 RBP: 00007f254e509ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9d860d9f R14: 00007f254ca20300 R15: 0000000000022000 Allocated by task 21242: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] kzalloc include/linux/slab.h:709 [inline] bfs_fill_super+0x447/0xec0 fs/bfs/inode.c:363 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 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:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8203: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 kvfree+0x59/0x60 mm/util.c:452 __vunmap+0x2a5/0x3f0 mm/vmalloc.c:1534 vfree+0x65/0x100 mm/vmalloc.c:1598 free_list_bitmaps fs/reiserfs/journal.c:252 [inline] free_journal_ram+0x187/0x600 fs/reiserfs/journal.c:1895 do_journal_release fs/reiserfs/journal.c:1970 [inline] journal_release+0x225/0x4d0 fs/reiserfs/journal.c:1981 reiserfs_put_super+0xe0/0x5c0 fs/reiserfs/super.c:616 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 REISERFS (device loop1): checking transaction log (loop1) task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88809a64f980 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff88809a64f980, ffff88809a64f9a0) The buggy address belongs to the page: page:ffffea00026993c0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff88809a64ffc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002bbe608 ffffea000246cc48 ffff88813bff01c0 raw: ffff88809a64ffc1 ffff88809a64f000 000000010000003c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809a64f880: 01 fc fc fc fc fc fc fc 01 fc fc fc fc fc fc fc REISERFS (device loop1): Using r5 hash to sort names ffff88809a64f900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88809a64f980: 07 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88809a64fa00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88809a64fa80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ================================================================== REISERFS (device loop2): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop2): using ordered data mode REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers reiserfs: using flush barriers REISERFS (device loop4): found reiserfs format "3.5" with non-standard journal REISERFS (device loop2): journal params: device loop2, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): using ordered data mode reiserfs: enabling write barrier flush mode REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names