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KASAN: use-after-free Read in xlog_force_shutdown

Status: auto-obsoleted due to no activity on 2023/10/08 17:34
Reported-by: syzbot+4e00a2f01eecf7a2bf0c@syzkaller.appspotmail.com
First crash: 535d, last: 435d
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/05/20 upstream (ToT) 0dd2a6fb1e34 C Didn't crash

Sample crash report:
XFS (loop3): Please unmount the filesystem and rectify the problem(s)
XFS (loop0): log I/O error -5
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x74/0x1ff0 kernel/locking/lockdep.c:4881
Read of size 8 at addr ffff88807a451958 by task kworker/1:1H/1054

CPU: 1 PID: 1054 Comm: kworker/1:1H Not tainted 5.15.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: xfs-log/loop0 xlog_ioend_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 __lock_acquire+0x74/0x1ff0 kernel/locking/lockdep.c:4881
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 xlog_force_shutdown+0x16a/0x200 fs/xfs/xfs_log.c:3890
 xfs_do_force_shutdown+0x11d/0x430 fs/xfs/xfs_fsops.c:529
 xlog_ioend_work+0xc2/0x120 fs/xfs/xfs_log.c:1364
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Allocated by task 10097:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x168/0x300 mm/slub.c:4407
 kmalloc include/linux/slab.h:596 [inline]
 kmem_alloc+0x136/0x380 fs/xfs/kmem.c:21
 kmem_zalloc fs/xfs/kmem.h:69 [inline]
 xlog_cil_init+0x20/0x410 fs/xfs/xfs_log_cil.c:1454
 xlog_alloc_log+0x10bb/0x1380 fs/xfs/xfs_log.c:1625
 xfs_log_mount+0xd8/0x720 fs/xfs/xfs_log.c:633
 xfs_mountfs+0xb7a/0x1ca0 fs/xfs/xfs_mount.c:764
 xfs_fs_fill_super+0x100c/0x1240 fs/xfs/xfs_super.c:1658
 get_tree_bdev+0x3fe/0x620 fs/super.c:1303
 vfs_get_tree+0x88/0x270 fs/super.c:1508
 do_new_mount+0x28b/0xad0 fs/namespace.c:2994
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 3616:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kfree+0xf1/0x270 mm/slub.c:4559
 xlog_dealloc_log+0x28/0x240 fs/xfs/xfs_log.c:2064
 xfs_unmountfs+0x1bf/0x270 fs/xfs/xfs_mount.c:1040
 xfs_fs_put_super+0x65/0x2b0 fs/xfs/xfs_super.c:1090
 generic_shutdown_super+0x136/0x2c0 fs/super.c:475
 kill_block_super+0x7a/0xe0 fs/super.c:1405
 deactivate_locked_super+0xa0/0x110 fs/super.c:335
 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Last potentially related work creation:
 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3560
 neigh_periodic_work+0x3cb/0xba0 net/core/neighbour.c:967
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88807a451800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 344 bytes inside of
 1024-byte region [ffff88807a451800, ffff88807a451c00)
The buggy address belongs to the page:
page:ffffea0001e91400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a450
head:ffffea0001e91400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011c41dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3612, ts 1622885864292, free_ts 1622788503046
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 __kmalloc_node_track_caller+0x1f6/0x390 mm/slub.c:4958
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x12c/0x590 net/core/skbuff.c:427
 alloc_skb include/linux/skbuff.h:1167 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_fib+0x140/0x620 net/ipv4/fib_semantics.c:519
 fib_table_insert+0xfc0/0x1f90 net/ipv4/fib_trie.c:1398
 fib_magic net/ipv4/fib_frontend.c:1093 [inline]
 fib_add_ifaddr+0x47f/0x1730 net/ipv4/fib_frontend.c:1115
 fib_inetaddr_event+0x12b/0x2b0 net/ipv4/fib_frontend.c:1429
 notifier_call_chain kernel/notifier.c:83 [inline]
 blocking_notifier_call_chain+0x104/0x1b0 kernel/notifier.c:318
 __inet_insert_ifa+0x9f8/0xc10 net/ipv4/devinet.c:553
 inet_rtm_newaddr+0x8ca/0x1840 net/ipv4/devinet.c:956
 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5587
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 free_slab mm/slub.c:2015 [inline]
 discard_slab mm/slub.c:2021 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507
 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587
 do_slab_free mm/slub.c:3487 [inline]
 ___cache_free+0xe3/0x100 mm/slub.c:3506
 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256
 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415
 alloc_skb include/linux/skbuff.h:1167 [inline]
 alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6119
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2497
 mld_newpack+0x1b4/0xa20 net/ipv6/mcast.c:1748
 add_grhead net/ipv6/mcast.c:1851 [inline]
 add_grec+0x1328/0x1770 net/ipv6/mcast.c:1989
 mld_send_initial_cr+0x20f/0x3a0 net/ipv6/mcast.c:2236

Memory state around the buggy address:
 ffff88807a451800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807a451880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807a451900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88807a451980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807a451a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/14 04:04 linux-5.15.y b0ece631f84a 2b9ba477 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/06/30 17:33 linux-5.15.y 4af60700a60c af3053d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/06/29 22:26 linux-5.15.y 4af60700a60c 01298212 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/06/09 11:24 linux-5.15.y 7349e40704a0 058b3a5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/06/02 06:24 linux-5.15.y 0ab06468cbd1 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/05/04 07:35 linux-5.15.y 8a7f2a5c5aa1 5b7ff9dd .config console log report info ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/05/01 04:50 linux-5.15.y 8a7f2a5c5aa1 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/03/29 22:27 linux-5.15.y 115472395b0a f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in xlog_force_shutdown
2023/06/23 11:59 linux-5.15.y f67653019430 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xlog_force_shutdown
2023/06/15 14:19 linux-5.15.y 471e639e59d1 90d4044e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xlog_force_shutdown
2023/03/22 15:53 linux-5.15.y 115472395b0a 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in xlog_force_shutdown
* Struck through repros no longer work on HEAD.