audit: type=1800 audit(1671041054.080:59): pid=13270 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14349 res=0 NILFS (loop1): I/O error reading meta-data file (ino=6, block-offset=1) ================================================================== BUG: KASAN: use-after-free in nilfs_segctor_confirm+0x147/0x160 fs/nilfs2/segment.c:855 audit: type=1800 audit(1671041054.110:60): pid=13272 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14350 res=0 Read of size 8 at addr ffff8880b037b730 by task syz-executor.1/7986 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) CPU: 1 PID: 7986 Comm: syz-executor.1 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 UDF-fs: unknown compression code (0) Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 audit: type=1800 audit(1671041057.470:61): pid=13346 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14357 res=0 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 audit: type=1800 audit(1671041058.360:62): pid=13324 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14358 res=0 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 nilfs_segctor_confirm+0x147/0x160 fs/nilfs2/segment.c:855 audit: type=1800 audit(1671041058.390:63): pid=13326 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14359 res=0 nilfs_segctor_destroy fs/nilfs2/segment.c:2749 [inline] nilfs_detach_log_writer+0x7f9/0x980 fs/nilfs2/segment.c:2830 nilfs_put_super+0x3f/0x190 fs/nilfs2/super.c:480 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fb8ad454547 audit: type=1800 audit(1671041058.410:64): pid=13327 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=14360 res=0 audit: type=1800 audit(1671041058.450:65): pid=13339 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14361 res=0 RSP: 002b:00007ffce6a21fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb8ad454547 RDX: 00007ffce6a220ba RSI: 000000000000000a RDI: 00007ffce6a220b0 RBP: 00007ffce6a220b0 R08: 00000000ffffffff R09: 00007ffce6a21e80 R10: 0000555556c06903 R11: 0000000000000246 R12: 00007fb8ad4adb24 R13: 00007ffce6a23170 R14: 0000555556c06810 R15: 00007ffce6a231b0 Allocated by task 13381: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] nilfs_find_or_create_root+0x84/0x410 fs/nilfs2/the_nilfs.c:759 nilfs_attach_checkpoint+0xa2/0x420 fs/nilfs2/super.c:531 nilfs_fill_super fs/nilfs2/super.c:1079 [inline] nilfs_mount+0x911/0xd00 fs/nilfs2/super.c:1330 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal Freed by task 7986: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 nilfs_put_root+0x9a/0xc0 fs/nilfs2/the_nilfs.c:817 nilfs_clear_inode+0x251/0x2e0 fs/nilfs2/inode.c:934 nilfs_evict_inode+0x2dd/0x3a0 fs/nilfs2/inode.c:947 evict+0x2c8/0x700 fs/inode.c:554 dispose_list+0x109/0x1e0 fs/inode.c:589 REISERFS (device loop3): using ordered data mode evict_inodes+0x2cd/0x3a0 fs/inode.c:639 generic_shutdown_super+0xb3/0x370 fs/super.c:438 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 reiserfs: using flush barriers entry_SYSCALL_64_after_hwframe+0x5e/0xd3 The buggy address belongs to the object at ffff8880b037b700 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 48 bytes inside of 256-byte region [ffff8880b037b700, ffff8880b037b800) The buggy address belongs to the page: page:ffffea0002c0dec0 count:1 mapcount:0 mapping:ffff8880b037b0c0 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880b037b0c0 0000000000000000 000000010000000c raw: ffffea00025c0fe0 ffffea00025f0160 ffff88813fe747c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b037b600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880b037b680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880b037b700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880b037b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880b037b800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ==================================================================