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KASAN: slab-use-after-free Read in xfs_qm_dquot_logitem_unpin

Status: auto-obsoleted due to no activity on 2023/11/20 17:42
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+f9db3fad6571768b3db0@syzkaller.appspotmail.com
First crash: 330d, last: 330d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-use-after-free Read in xfs_qm_dquot_logitem_unpin (2) xfs 3 21d 47d 0/27 moderation: reported on 2024/05/31 18:56

Sample crash report:
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff88802998c274 by task kworker/2:1H/69

CPU: 2 PID: 69 Comm: kworker/2:1H Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: xfs-log/loop0 xlog_ioend_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
 do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:114
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0x42/0x50 kernel/locking/spinlock.c:162
 __wake_up_common_lock+0xbb/0x140 kernel/sched/wait.c:137
 xfs_qm_dquot_logitem_unpin+0x81/0x90 fs/xfs/xfs_dquot_item.c:96
 xfs_log_item_batch_insert fs/xfs/xfs_trans.c:738 [inline]
 xfs_trans_committed_bulk+0x72b/0x870 fs/xfs/xfs_trans.c:842
 xlog_cil_committed+0x1bf/0xf60 fs/xfs/xfs_log_cil.c:795
 xlog_cil_process_committed+0x123/0x1f0 fs/xfs/xfs_log_cil.c:823
 xlog_state_do_iclog_callbacks fs/xfs/xfs_log.c:2811 [inline]
 xlog_state_do_callback+0x549/0xcc0 fs/xfs/xfs_log.c:2836
 xlog_ioend_work+0x8a/0x110 fs/xfs/xfs_log.c:1415
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Allocated by task 28615:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3470 [inline]
 slab_alloc mm/slub.c:3478 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3485 [inline]
 kmem_cache_alloc+0x172/0x3b0 mm/slub.c:3494
 kmem_cache_zalloc include/linux/slab.h:693 [inline]
 xfs_dquot_alloc+0x2a/0x670 fs/xfs/xfs_dquot.c:475
 xfs_qm_dqread+0x8b/0x540 fs/xfs/xfs_dquot.c:659
 xfs_qm_dqget+0x151/0x4a0 fs/xfs/xfs_dquot.c:869
 xfs_qm_scall_setqlim+0x16e/0x1960 fs/xfs/xfs_qm_syscalls.c:300
 xfs_fs_set_dqblk+0x16f/0x1e0 fs/xfs/xfs_quotaops.c:267
 quota_setquota+0x4bc/0x5e0 fs/quota/quota.c:310
 do_quotactl+0xb01/0x13d0 fs/quota/quota.c:802
 __do_sys_quotactl fs/quota/quota.c:961 [inline]
 __se_sys_quotactl fs/quota/quota.c:917 [inline]
 __ia32_sys_quotactl+0x1bb/0x440 fs/quota/quota.c:917
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Freed by task 112:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1792 [inline]
 slab_free_freelist_hook+0x10b/0x1e0 mm/slub.c:1818
 slab_free mm/slub.c:3801 [inline]
 kmem_cache_free+0xf0/0x490 mm/slub.c:3823
 xfs_qm_shrink_scan+0x238/0x3e0 fs/xfs/xfs_qm.c:531
 do_shrink_slab+0x422/0xaa0 mm/vmscan.c:900
 shrink_slab+0x17f/0x6e0 mm/vmscan.c:1060
 shrink_one+0x4f7/0x700 mm/vmscan.c:5403
 shrink_many mm/vmscan.c:5453 [inline]
 lru_gen_shrink_node mm/vmscan.c:5570 [inline]
 shrink_node+0x20c2/0x3730 mm/vmscan.c:6510
 kswapd_shrink_node mm/vmscan.c:7315 [inline]
 balance_pgdat+0xa37/0x1b90 mm/vmscan.c:7505
 kswapd+0x5be/0xbf0 mm/vmscan.c:7765
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

The buggy address belongs to the object at ffff88802998c000
 which belongs to the cache xfs_dquot of size 704
The buggy address is located 628 bytes inside of
 freed 704-byte region [ffff88802998c000, ffff88802998c2c0)

The buggy address belongs to the physical page:
page:ffffea0000a66300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2998c
head:ffffea0000a66300 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888044162000 ffffea0001307600 dead000000000003
raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 16116, tgid 16115 (syz-executor.3), ts 357922400903, free_ts 344533158681
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221
 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477
 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2292
 alloc_slab_page mm/slub.c:1862 [inline]
 allocate_slab+0x24e/0x380 mm/slub.c:2009
 new_slab mm/slub.c:2062 [inline]
 ___slab_alloc+0x8bc/0x1570 mm/slub.c:3215
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314
 __slab_alloc_node mm/slub.c:3367 [inline]
 slab_alloc_node mm/slub.c:3460 [inline]
 slab_alloc mm/slub.c:3478 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3485 [inline]
 kmem_cache_alloc+0x392/0x3b0 mm/slub.c:3494
 kmem_cache_zalloc include/linux/slab.h:693 [inline]
 xfs_dquot_alloc+0x2a/0x670 fs/xfs/xfs_dquot.c:475
 xfs_qm_dqread+0x8b/0x540 fs/xfs/xfs_dquot.c:659
 xfs_qm_dqget_uncached+0xc5/0x180 fs/xfs/xfs_dquot.c:908
 xfs_qm_set_defquota+0x80/0x3a0 fs/xfs/xfs_qm.c:558
 xfs_qm_init_quotainfo+0x814/0xa10 fs/xfs/xfs_qm.c:681
 xfs_qm_mount_quotas+0x59/0x6a0 fs/xfs/xfs_qm.c:1444
 xfs_mountfs+0x1c8b/0x1de0 fs/xfs/xfs_mount.c:959
 xfs_fs_fill_super+0x145b/0x1e50 fs/xfs/xfs_super.c:1710
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2348
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443
 __unfreeze_partials+0x21d/0x240 mm/slub.c:2647
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3470 [inline]
 slab_alloc mm/slub.c:3478 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3485 [inline]
 kmem_cache_alloc_lru+0x21a/0x630 mm/slub.c:3501
 alloc_inode_sb include/linux/fs.h:2735 [inline]
 sock_alloc_inode+0x25/0x1c0 net/socket.c:305
 alloc_inode+0x5d/0x220 fs/inode.c:259
 new_inode_pseudo+0x16/0x80 fs/inode.c:1017
 sock_alloc+0x40/0x270 net/socket.c:631
 __sock_create+0xbc/0x810 net/socket.c:1500
 sock_create net/socket.c:1587 [inline]
 __sys_socket_create net/socket.c:1624 [inline]
 __sys_socket+0x13d/0x250 net/socket.c:1652
 __do_compat_sys_socketcall+0x57b/0x700 net/compat.c:448
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203

Memory state around the buggy address:
 ffff88802998c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802998c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802998c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88802998c280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88802998c300: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/22 17:41 upstream f7757129e3de 96546ace .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in xfs_qm_dquot_logitem_unpin
* Struck through repros no longer work on HEAD.