syzbot


KASAN: slab-use-after-free Write in xfs_destroy_mount_workqueues

Status: closed as dup on 2023/04/03 05:23
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+dbf40c60b210c809755a@syzkaller.appspotmail.com
First crash: 474d, last: 474d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: slab-use-after-free Read in class_register usb C done 13 473d 471d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in xfs_destroy_mount_workqueues xfs 46 19h20m 57d 0/27 upstream: reported on 2024/05/19 15:13

Sample crash report:
XFS (loop5): Unmounting Filesystem a2f82aab-77f8-4286-afd4-a8f747a74bab
==================================================================
BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:901 [inline]
BUG: KASAN: slab-use-after-free in hlist_del_rcu include/linux/rculist.h:513 [inline]
BUG: KASAN: slab-use-after-free in lockdep_unregister_key+0x417/0x460 kernel/locking/lockdep.c:6397
Write of size 8 at addr ffff888039bceb68 by task syz-executor.5/5125

CPU: 0 PID: 5125 Comm: syz-executor.5 Not tainted 6.3.0-rc4-next-20230329-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:572
 __hlist_del include/linux/list.h:901 [inline]
 hlist_del_rcu include/linux/rculist.h:513 [inline]
 lockdep_unregister_key+0x417/0x460 kernel/locking/lockdep.c:6397
 wq_unregister_lockdep kernel/workqueue.c:3615 [inline]
 destroy_workqueue+0x73d/0x8e0 kernel/workqueue.c:4604
 xfs_destroy_mount_workqueues+0x93/0x150 fs/xfs/xfs_super.c:596
 xfs_fs_put_super+0x267/0x3b0 fs/xfs/xfs_super.c:1133
 generic_shutdown_super+0x158/0x480 fs/super.c:500
 kill_block_super+0x9b/0xf0 fs/super.c:1407
 deactivate_locked_super+0x98/0x160 fs/super.c:331
 deactivate_super+0xb1/0xd0 fs/super.c:362
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe31ae8d567
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffd703a7a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe31ae8d567
RDX: 00007ffd703a7b0b RSI: 000000000000000a RDI: 00007ffd703a7b00
RBP: 00007ffd703a7b00 R08: 00000000ffffffff R09: 00007ffd703a78d0
R10: 0000555556d748b3 R11: 0000000000000246 R12: 00007fe31aee6b74
R13: 00007ffd703a8bc0 R14: 0000555556d74810 R15: 00007ffd703a8c00
 </TASK>

Allocated by task 5181:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:680 [inline]
 class_register+0x55/0x530 drivers/base/class.c:165
 class_create+0x99/0x100 drivers/base/class.c:249
 init_usb_class drivers/usb/core/file.c:91 [inline]
 usb_register_dev+0x4e7/0x860 drivers/usb/core/file.c:179
 usblp_probe+0xc91/0x16d0 drivers/usb/class/usblp.c:1208
 usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x11c4/0x1c50 drivers/base/core.c:3611
 usb_set_configuration+0x10ee/0x1af0 drivers/usb/core/message.c:2171
 usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238
 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x11c4/0x1c50 drivers/base/core.c:3611
 usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x2d9e/0x4e40 drivers/usb/core/hub.c:5793
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Freed by task 5188:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
 kobject_cleanup lib/kobject.c:683 [inline]
 kobject_release lib/kobject.c:714 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1c2/0x4d0 lib/kobject.c:731
 kset_unregister+0x64/0x80 lib/kobject.c:880
 class_destroy+0x3c/0x50 drivers/base/class.c:273
 release_usb_class drivers/usb/core/file.c:108 [inline]
 kref_put include/linux/kref.h:65 [inline]
 destroy_usb_class drivers/usb/core/file.c:116 [inline]
 usb_deregister_dev+0x274/0x320 drivers/usb/core/file.c:245
 usblp_disconnect+0x4a/0x330 drivers/usb/class/usblp.c:1396
 usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1267 [inline]
 device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1290
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x48a/0xb80 drivers/base/core.c:3797
 usb_disable_device+0x35a/0x7b0 drivers/usb/core/message.c:1420
 usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2238
 hub_port_connect drivers/usb/core/hub.c:5246 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x1fbf/0x4e40 drivers/usb/core/hub.c:5793
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 kvfree_call_rcu+0x70/0xad0 kernel/rcu/tree.c:3331
 neigh_destroy+0x433/0x660 net/core/neighbour.c:910
 neigh_release include/net/neighbour.h:447 [inline]
 neigh_cleanup_and_release net/core/neighbour.c:103 [inline]
 neigh_periodic_work+0x726/0xb80 net/core/neighbour.c:994
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff888039bce800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 872 bytes inside of
 freed 1024-byte region [ffff888039bce800, ffff888039bcec00)

The buggy address belongs to the physical page:
page:ffffea0000e6f200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888039bc9800 pfn:0x39bc8
head:ffffea0000e6f200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 ffffea0001fa2c10 ffffea0000786810
raw: ffff888039bc9800 000000000010000f 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7, tgid 7 (kworker/0:0), ts 263987098169, free_ts 0
 prep_new_page mm/page_alloc.c:1729 [inline]
 get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x28e/0x380 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986
 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535
 __alloc_skb+0x129/0x330 net/core/skbuff.c:604
 alloc_skb include/linux/skbuff.h:1269 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166
 fib6_add_rt2node net/ipv6/ip6_fib.c:1251 [inline]
 fib6_add+0x200d/0x4080 net/ipv6/ip6_fib.c:1477
 __ip6_ins_rt net/ipv6/route.c:1302 [inline]
 ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1312
 __ipv6_ifa_notify+0x8fe/0xb90 net/ipv6/addrconf.c:6163
 ipv6_ifa_notify net/ipv6/addrconf.c:6202 [inline]
 addrconf_dad_completed+0x133/0xe00 net/ipv6/addrconf.c:4214
 addrconf_dad_work+0x75d/0x1390 net/ipv6/addrconf.c:4162
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888039bcea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039bcea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888039bceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff888039bceb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039bcec00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/29 10:35 linux-next 198925fae644 fc067f05 .config console log report info ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Write in xfs_destroy_mount_workqueues
* Struck through repros no longer work on HEAD.