XFS (loop5): Quotacheck needed: Please wait. syz-executor.1 (9818): drop_caches: 2 syz-executor.2 (9817): drop_caches: 2 syz-executor.1 (9818): drop_caches: 2 ================================================================== BUG: KASAN: use-after-free in list_sort.part.0+0x693/0x6d0 lib/list_sort.c:117 Write of size 8 at addr ffff8880a34c9788 by task syz-executor.5/9759 syz-executor.2 (9817): drop_caches: 2 CPU: 0 PID: 9759 Comm: syz-executor.5 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_store8_noabort+0x68/0x70 mm/kasan/report.c:435 list_sort.part.0+0x693/0x6d0 lib/list_sort.c:117 list_sort+0x46/0x60 lib/list_sort.c:112 xfs_buf_delwri_submit_buffers+0x96/0x9c0 fs/xfs/xfs_buf.c:1992 xfs_buf_delwri_submit+0x76/0x240 fs/xfs/xfs_buf.c:2075 xfs_qm_quotacheck+0x2a7/0x790 fs/xfs/xfs_qm.c:1367 xfs_qm_mount_quotas+0xe9/0x570 fs/xfs/xfs_qm.c:1457 xfs_mountfs+0x18be/0x1f40 fs/xfs/xfs_mount.c:979 xfs_fs_fill_super+0xb7a/0x1380 fs/xfs/xfs_super.c:1688 mount_bdev+0x2b3/0x360 fs/super.c:1134 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 RIP: 0033:0x7fa5f4a085fa RSP: 002b:00007fa5f2f78f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000baed RCX: 00007fa5f4a085fa RDX: 000000002000bb00 RSI: 0000000020000040 RDI: 00007fa5f2f78fe0 RBP: 00007fa5f2f79020 R08: 00007fa5f2f79020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000002000bb00 R13: 0000000020000040 R14: 00007fa5f2f78fe0 R15: 0000000020000000 Allocated by task 9759: 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+0x124/0x3c0 mm/slab.c:3552 kmem_zone_alloc+0x7f/0x180 fs/xfs/kmem.c:106 kmem_zone_zalloc fs/xfs/kmem.h:131 [inline] _xfs_buf_alloc+0x32/0xcf0 fs/xfs/xfs_buf.c:248 xfs_buf_get_map+0x436/0x5f0 fs/xfs/xfs_buf.c:695 xfs_trans_get_buf_map+0x277/0x710 fs/xfs/xfs_trans_buf.c:170 xfs_trans_get_buf fs/xfs/xfs_trans.h:179 [inline] xfs_qm_dqalloc+0x5e6/0xa20 fs/xfs/xfs_dquot.c:354 xfs_qm_dqtobp+0x926/0xcf0 fs/xfs/xfs_dquot.c:518 xfs_qm_dqread+0x3a3/0xe50 fs/xfs/xfs_dquot.c:629 xfs_qm_dqget+0x4f4/0x19a0 fs/xfs/xfs_dquot.c:837 xfs_qm_quotacheck_dqadjust+0x96/0x5c0 fs/xfs/xfs_qm.c:1077 xfs_qm_dqusage_adjust+0x428/0xc20 fs/xfs/xfs_qm.c:1192 xfs_bulkstat_ag_ichunk fs/xfs/xfs_itable.c:313 [inline] xfs_bulkstat+0x72a/0xf60 fs/xfs/xfs_itable.c:498 xfs_qm_quotacheck+0x223/0x790 fs/xfs/xfs_qm.c:1338 xfs_qm_mount_quotas+0xe9/0x570 fs/xfs/xfs_qm.c:1457 xfs_mountfs+0x18be/0x1f40 fs/xfs/xfs_mount.c:979 xfs_fs_fill_super+0xb7a/0x1380 fs/xfs/xfs_super.c:1688 mount_bdev+0x2b3/0x360 fs/super.c:1134 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 Freed by task 9817: 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] kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758 xfs_buf_rele+0x810/0x12a0 fs/xfs/xfs_buf.c:1074 xfs_buftarg_shrink_scan+0x18a/0x270 fs/xfs/xfs_buf.c:1769 do_shrink_slab mm/vmscan.c:401 [inline] shrink_slab+0x535/0xb60 mm/vmscan.c:504 drop_slab_node+0x2b/0x60 mm/vmscan.c:531 drop_slab+0x39/0x70 mm/vmscan.c:542 drop_caches_sysctl_handler+0xc9/0xe0 fs/drop_caches.c:65 proc_sys_call_handler.isra.0+0x1ba/0x340 fs/proc/proc_sysctl.c:598 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1496 [inline] SyS_sendfile64+0x9b/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 The buggy address belongs to the object at ffff8880a34c9680 which belongs to the cache xfs_buf of size 584 The buggy address is located 264 bytes inside of 584-byte region [ffff8880a34c9680, ffff8880a34c98c8) The buggy address belongs to the page: page:ffffea00028d3240 count:1 mapcount:0 mapping:ffff8880a34c9080 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a34c9080 0000000000000000 0000000100000005 raw: ffffea00024defe0 ffffea00027779e0 ffff8880b1bbf800 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a34c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a34c9700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880a34c9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a34c9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a34c9880: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ==================================================================