[cluster?] KASAN: use-after-free Read in gfs2_glock_free
3 views
Skip to first unread message
syzbot
Feb 18, 2023, 7:50:55 AM2/18/23
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: dbeed98d89ea Merge tag 'powerpc-6.2-6' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1727c6e8c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=5f0b8e3df6f76ec
dashboard link: https://syzkaller.appspot.com/bug?extid=4ef8215f36f852e6c1e7
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [agru...@redhat.com cluste...@redhat.com linux-...@vger.kernel.org linux-...@vger.kernel.org rpet...@redhat.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f4b712e51193/disk-dbeed98d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/efaac87efb64/vmlinux-dbeed98d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/63503aaa8146/bzImage-dbeed98d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4ef821...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff88802baf0518 by task kworker/1:1H/51
CPU: 1 PID: 51 Comm: kworker/1:1H Not tainted 6.2.0-rc8-syzkaller-00127-gdbeed98d89ea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: glock_workqueue glock_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
gfs2_glock_free+0x9d9/0x1020 fs/gfs2/glock.c:180
glock_work_func+0x2d1/0x3b0 fs/gfs2/glock.c:1072
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 8132:
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+0xa5/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:580 [inline]
kzalloc include/linux/slab.h:720 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x125/0x27a0 fs/gfs2/ops_fstype.c:1149
get_tree_bdev+0x444/0x760 fs/super.c:1282
gfs2_get_tree+0x4e/0x270 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 5114:
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:523
____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:177 [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/0x3b0 mm/slub.c:3800
generic_shutdown_super+0x158/0x410 fs/super.c:492
kill_block_super+0x9b/0xf0 fs/super.c:1386
gfs2_kill_sb+0x108/0x170 fs/gfs2/ops_fstype.c:1738
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
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+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88802baf0000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1304 bytes inside of
8192-byte region [ffff88802baf0000, ffff88802baf2000)
The buggy address belongs to the physical page:
page:ffffea0000aebc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2baf0
head:ffffea0000aebc00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888012442280 ffffea0001097a00 0000000000000005
raw: 0000000000000000 0000000000020002 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 7947, tgid 7946 (syz-executor.1), ts 324627967742, free_ts 324453142333
prep_new_page mm/page_alloc.c:2531 [inline]
get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2287
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x350 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+0x1a4/0x430 mm/slub.c:3491
kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
kmalloc include/linux/slab.h:580 [inline]
audit_log_d_path+0xd2/0x1e0 kernel/audit.c:2134
audit_log_d_path_exe+0x44/0x70 kernel/audit.c:2205
audit_log_task+0x273/0x300 kernel/auditsc.c:2949
audit_seccomp+0x7a/0x290 kernel/auditsc.c:2996
seccomp_log kernel/seccomp.c:994 [inline]
__seccomp_filter+0x81c/0x1080 kernel/seccomp.c:1280
__secure_computing+0x24a/0x3e0 kernel/seccomp.c:1342
syscall_trace_enter.constprop.0+0x90/0x250 kernel/entry/common.c:72
do_syscall_64+0x1a/0xb0 arch/x86/entry/common.c:76
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1446 [inline]
free_pcp_prepare+0x66a/0xc20 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:761 [inline]
slab_alloc_node mm/slub.c:3452 [inline]
__kmem_cache_alloc_node+0x1ea/0x430 mm/slub.c:3491
kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
kmalloc include/linux/slab.h:580 [inline]
gro_cells_destroy net/core/gro_cells.c:125 [inline]
gro_cells_destroy+0x26b/0x470 net/core/gro_cells.c:105
ip6_dev_free+0x19/0x60 net/ipv6/ip6_tunnel.c:248
netdev_run_todo+0x6bf/0x1100 net/core/dev.c:10344
ip6_tnl_exit_batch_net+0x5fe/0x890 net/ipv6/ip6_tunnel.c:2279
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
setup_net+0x7fb/0xc50 net/core/net_namespace.c:361
copy_net_ns+0x4e9/0x8d0 net/core/net_namespace.c:490
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
Memory state around the buggy address:
ffff88802baf0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802baf0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802baf0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: dbeed98d89ea Merge tag 'powerpc-6.2-6' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1727c6e8c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=5f0b8e3df6f76ec
dashboard link: https://syzkaller.appspot.com/bug?extid=4ef8215f36f852e6c1e7
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [agru...@redhat.com cluste...@redhat.com linux-...@vger.kernel.org linux-...@vger.kernel.org rpet...@redhat.com]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f4b712e51193/disk-dbeed98d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/efaac87efb64/vmlinux-dbeed98d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/63503aaa8146/bzImage-dbeed98d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4ef821...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
Read of size 8 at addr ffff88802baf0518 by task kworker/1:1H/51
CPU: 1 PID: 51 Comm: kworker/1:1H Not tainted 6.2.0-rc8-syzkaller-00127-gdbeed98d89ea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: glock_workqueue glock_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
__lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
gfs2_glock_free+0x9d9/0x1020 fs/gfs2/glock.c:180
glock_work_func+0x2d1/0x3b0 fs/gfs2/glock.c:1072
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 8132:
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+0xa5/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:580 [inline]
kzalloc include/linux/slab.h:720 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x125/0x27a0 fs/gfs2/ops_fstype.c:1149
get_tree_bdev+0x444/0x760 fs/super.c:1282
gfs2_get_tree+0x4e/0x270 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 5114:
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:523
____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:177 [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/0x3b0 mm/slub.c:3800
generic_shutdown_super+0x158/0x410 fs/super.c:492
kill_block_super+0x9b/0xf0 fs/super.c:1386
gfs2_kill_sb+0x108/0x170 fs/gfs2/ops_fstype.c:1738
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
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+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88802baf0000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1304 bytes inside of
8192-byte region [ffff88802baf0000, ffff88802baf2000)
The buggy address belongs to the physical page:
page:ffffea0000aebc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2baf0
head:ffffea0000aebc00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888012442280 ffffea0001097a00 0000000000000005
raw: 0000000000000000 0000000000020002 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 7947, tgid 7946 (syz-executor.1), ts 324627967742, free_ts 324453142333
prep_new_page mm/page_alloc.c:2531 [inline]
get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2287
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x350 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+0x1a4/0x430 mm/slub.c:3491
kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
kmalloc include/linux/slab.h:580 [inline]
audit_log_d_path+0xd2/0x1e0 kernel/audit.c:2134
audit_log_d_path_exe+0x44/0x70 kernel/audit.c:2205
audit_log_task+0x273/0x300 kernel/auditsc.c:2949
audit_seccomp+0x7a/0x290 kernel/auditsc.c:2996
seccomp_log kernel/seccomp.c:994 [inline]
__seccomp_filter+0x81c/0x1080 kernel/seccomp.c:1280
__secure_computing+0x24a/0x3e0 kernel/seccomp.c:1342
syscall_trace_enter.constprop.0+0x90/0x250 kernel/entry/common.c:72
do_syscall_64+0x1a/0xb0 arch/x86/entry/common.c:76
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1446 [inline]
free_pcp_prepare+0x66a/0xc20 mm/page_alloc.c:1496
free_unref_page_prepare mm/page_alloc.c:3369 [inline]
free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:761 [inline]
slab_alloc_node mm/slub.c:3452 [inline]
__kmem_cache_alloc_node+0x1ea/0x430 mm/slub.c:3491
kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
kmalloc include/linux/slab.h:580 [inline]
gro_cells_destroy net/core/gro_cells.c:125 [inline]
gro_cells_destroy+0x26b/0x470 net/core/gro_cells.c:105
ip6_dev_free+0x19/0x60 net/ipv6/ip6_tunnel.c:248
netdev_run_todo+0x6bf/0x1100 net/core/dev.c:10344
ip6_tnl_exit_batch_net+0x5fe/0x890 net/ipv6/ip6_tunnel.c:2279
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
setup_net+0x7fb/0xc50 net/core/net_namespace.c:361
copy_net_ns+0x4e9/0x8d0 net/core/net_namespace.c:490
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
Memory state around the buggy address:
ffff88802baf0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802baf0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802baf0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
May 19, 2023, 3:29:51 AM5/19/23
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
Reply all
Reply to author
Forward
0 new messages