XFS (loop1): Unmounting Filesystem ================================================================== BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:132 [inline] BUG: KASAN: use-after-free in rht_head_hashfn include/linux/rhashtable.h:147 [inline] BUG: KASAN: use-after-free in __rhashtable_remove_fast_one include/linux/rhashtable.h:882 [inline] BUG: KASAN: use-after-free in __rhashtable_remove_fast include/linux/rhashtable.h:962 [inline] BUG: KASAN: use-after-free in rhashtable_remove_fast include/linux/rhashtable.h:991 [inline] BUG: KASAN: use-after-free in xfs_buf_rele+0x147b/0x1540 fs/xfs/xfs_buf.c:1086 Read of size 4 at addr ffff88809d20accc by task syz-executor.0/11302 CPU: 0 PID: 11302 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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_load4_noabort+0x88/0x90 mm/kasan/report.c:432 rht_key_hashfn include/linux/rhashtable.h:132 [inline] rht_head_hashfn include/linux/rhashtable.h:147 [inline] __rhashtable_remove_fast_one include/linux/rhashtable.h:882 [inline] __rhashtable_remove_fast include/linux/rhashtable.h:962 [inline] rhashtable_remove_fast include/linux/rhashtable.h:991 [inline] xfs_buf_rele+0x147b/0x1540 fs/xfs/xfs_buf.c:1086 xfs_buftarg_shrink_scan+0x1bc/0x2c0 fs/xfs/xfs_buf.c:1753 do_shrink_slab+0x397/0xa40 mm/vmscan.c:537 shrink_slab+0x16f/0x550 mm/vmscan.c:693 drop_slab_node+0x33/0x70 mm/vmscan.c:724 drop_slab+0x4b/0x90 mm/vmscan.c:734 drop_caches_sysctl_handler+0xf6/0x110 fs/drop_caches.c:65 proc_sys_call_handler.isra.0+0x1f3/0x3b0 fs/proc/proc_sysctl.c:597 __vfs_write+0xf7/0x770 fs/read_write.c:485 __kernel_write+0x109/0x370 fs/read_write.c:506 write_pipe_buf+0x153/0x1f0 fs/splice.c:798 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] default_file_splice_write+0xd8/0x180 fs/splice.c:810 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1025 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1502 [inline] __se_sys_sendfile64+0xc4/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6b6c50d0d9 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:00007f6b6aa7f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f6b6c62cf80 RCX: 00007f6b6c50d0d9 RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000005 RBP: 00007f6b6c568ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc16859e8f R14: 00007f6b6aa7f300 R15: 0000000000022000 Allocated by task 11242: __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] kvzalloc include/linux/mm.h:585 [inline] bucket_table_alloc+0x3a/0x440 lib/rhashtable.c:176 rhashtable_init+0x3bc/0x810 lib/rhashtable.c:1069 xfs_initialize_perag+0x1a9/0x4e0 fs/xfs/xfs_mount.c:207 xfs_mountfs+0xbfa/0x1bf0 fs/xfs/xfs_mount.c:862 xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 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 8145: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 kvfree+0x59/0x60 mm/util.c:452 rhashtable_free_and_destroy+0x15e/0x970 lib/rhashtable.c:1167 xfs_free_perag+0xab/0x120 fs/xfs/xfs_mount.c:152 xfs_unmountfs+0x1d0/0x2b0 fs/xfs/xfs_mount.c:1180 xfs_fs_put_super+0x62/0x130 fs/xfs/xfs_super.c:1774 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 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 ffff88809d20acc0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 12 bytes inside of 512-byte region [ffff88809d20acc0, ffff88809d20aec0) The buggy address belongs to the page: page:ffffea0002748280 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea000294f908 ffffea00025a1b48 ffff88813bff0940 raw: 0000000000000000 ffff88809d20a040 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809d20ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809d20ac00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88809d20ac80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff88809d20ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809d20ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================