==================================================================
BUG: KASAN: slab-use-after-free in memcmp+0x1b5/0x1c0 lib/string.c:681
Read of size 8 at addr ffff88807c497780 by task syz-executor.5/10620

CPU: 0 PID: 10620 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
 memcmp+0x1b5/0x1c0 lib/string.c:681
 memcmp include/linux/fortify-string.h:728 [inline]
 compare_mount_options fs/ceph/super.c:622 [inline]
 ceph_compare_super+0x11a/0x8d0 fs/ceph/super.c:1147
 sget_fc+0x582/0x9b0 fs/super.c:778
 ceph_get_tree+0x6ea/0x1910 fs/ceph/super.c:1232
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efdf267cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efdf33540c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007efdf279bf80 RCX: 00007efdf267cae9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007efdf26c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efdf279bf80 R15: 00007ffe34521818
 </TASK>

Allocated by task 10605:
 kasan_save_stack+0x33/0x50 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+0xa2/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 ceph_init_fs_context+0xc8/0x530 fs/ceph/super.c:1333
 alloc_fs_context+0x56c/0x9f0 fs/fs_context.c:294
 __do_sys_fsopen fs/fsopen.c:137 [inline]
 __se_sys_fsopen fs/fsopen.c:115 [inline]
 __x64_sys_fsopen+0xeb/0x230 fs/fsopen.c:115
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 10605:
 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+0xb8/0x2f0 mm/slub.c:3814
 destroy_mount_options fs/ceph/super.c:599 [inline]
 destroy_mount_options+0xe9/0x140 fs/ceph/super.c:588
 destroy_fs_client+0x1b6/0x2b0 fs/ceph/super.c:860
 deactivate_locked_super+0xa0/0x2d0 fs/super.c:454
 ceph_get_tree+0x1270/0x1910 fs/ceph/super.c:1267
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

Second to last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

The buggy address belongs to the object at ffff88807c497780
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 freed 96-byte region [ffff88807c497780, ffff88807c4977e0)

The buggy address belongs to the physical page:
page:ffffea0001f125c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807c497280 pfn:0x7c497
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000200 ffff888012841780 ffffea0001219e10 ffffea0001e67450
raw: ffff88807c497280 0000000000200019 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5119, tgid 5119 (kworker/0:4), ts 95354580631, free_ts 95274446540
 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:2298
 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]
 __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3509
 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1076
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline]
 nsim_fib_event_nb+0x1b2/0xeb0 drivers/net/netdevsim/fib.c:1043
 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
 atomic_notifier_call_chain+0x73/0x1c0 kernel/notifier.c:231
 call_fib_notifiers+0x33/0x70 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:404 [inline]
 fib6_add_rt2node net/ipv6/ip6_fib.c:1229 [inline]
 fib6_add+0x25bf/0x4700 net/ipv6/ip6_fib.c:1483
 __ip6_ins_rt net/ipv6/route.c:1300 [inline]
 ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1310
 __ipv6_ifa_notify+0xc9b/0x11d0 net/ipv6/addrconf.c:6205
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]
 kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3515
 __alloc_skb+0x287/0x330 net/core/skbuff.c:634
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6299
 sock_alloc_send_pskb+0x7c8/0x950 net/core/sock.c:2794
 unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:728 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:751
 __sys_sendto+0x255/0x340 net/socket.c:2174
 __do_sys_sendto net/socket.c:2186 [inline]
 __se_sys_sendto net/socket.c:2182 [inline]
 __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2182
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807c497680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88807c497780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff88807c497800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in memcmp+0x192/0x1c0 lib/string.c:692
Read of size 1 at addr ffff88807c497780 by task syz-executor.5/10620

CPU: 0 PID: 10620 Comm: syz-executor.5 Tainted: G    B              6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
 memcmp+0x192/0x1c0 lib/string.c:692
 memcmp include/linux/fortify-string.h:728 [inline]
 compare_mount_options fs/ceph/super.c:622 [inline]
 ceph_compare_super+0x11a/0x8d0 fs/ceph/super.c:1147
 sget_fc+0x582/0x9b0 fs/super.c:778
 ceph_get_tree+0x6ea/0x1910 fs/ceph/super.c:1232
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efdf267cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efdf33540c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007efdf279bf80 RCX: 00007efdf267cae9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007efdf26c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efdf279bf80 R15: 00007ffe34521818
 </TASK>

Allocated by task 10605:
 kasan_save_stack+0x33/0x50 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+0xa2/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 ceph_init_fs_context+0xc8/0x530 fs/ceph/super.c:1333
 alloc_fs_context+0x56c/0x9f0 fs/fs_context.c:294
 __do_sys_fsopen fs/fsopen.c:137 [inline]
 __se_sys_fsopen fs/fsopen.c:115 [inline]
 __x64_sys_fsopen+0xeb/0x230 fs/fsopen.c:115
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 10605:
 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+0xb8/0x2f0 mm/slub.c:3814
 destroy_mount_options fs/ceph/super.c:599 [inline]
 destroy_mount_options+0xe9/0x140 fs/ceph/super.c:588
 destroy_fs_client+0x1b6/0x2b0 fs/ceph/super.c:860
 deactivate_locked_super+0xa0/0x2d0 fs/super.c:454
 ceph_get_tree+0x1270/0x1910 fs/ceph/super.c:1267
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

Second to last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

The buggy address belongs to the object at ffff88807c497780
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 freed 96-byte region [ffff88807c497780, ffff88807c4977e0)

The buggy address belongs to the physical page:
page:ffffea0001f125c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807c497280 pfn:0x7c497
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000200 ffff888012841780 ffffea0001219e10 ffffea0001e67450
raw: ffff88807c497280 0000000000200019 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5119, tgid 5119 (kworker/0:4), ts 95354580631, free_ts 95274446540
 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:2298
 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]
 __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3509
 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1076
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline]
 nsim_fib_event_nb+0x1b2/0xeb0 drivers/net/netdevsim/fib.c:1043
 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
 atomic_notifier_call_chain+0x73/0x1c0 kernel/notifier.c:231
 call_fib_notifiers+0x33/0x70 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:404 [inline]
 fib6_add_rt2node net/ipv6/ip6_fib.c:1229 [inline]
 fib6_add+0x25bf/0x4700 net/ipv6/ip6_fib.c:1483
 __ip6_ins_rt net/ipv6/route.c:1300 [inline]
 ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1310
 __ipv6_ifa_notify+0xc9b/0x11d0 net/ipv6/addrconf.c:6205
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]
 kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3515
 __alloc_skb+0x287/0x330 net/core/skbuff.c:634
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6299
 sock_alloc_send_pskb+0x7c8/0x950 net/core/sock.c:2794
 unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:728 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:751
 __sys_sendto+0x255/0x340 net/socket.c:2174
 __do_sys_sendto net/socket.c:2186 [inline]
 __se_sys_sendto net/socket.c:2182 [inline]
 __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2182
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807c497680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88807c497780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff88807c497800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in memcmp+0x192/0x1c0 lib/string.c:692
Read of size 1 at addr ffff88807c497781 by task syz-executor.5/10620

CPU: 0 PID: 10620 Comm: syz-executor.5 Tainted: G    B              6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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
 memcmp+0x192/0x1c0 lib/string.c:692
 memcmp include/linux/fortify-string.h:728 [inline]
 compare_mount_options fs/ceph/super.c:622 [inline]
 ceph_compare_super+0x11a/0x8d0 fs/ceph/super.c:1147
 sget_fc+0x582/0x9b0 fs/super.c:778
 ceph_get_tree+0x6ea/0x1910 fs/ceph/super.c:1232
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efdf267cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efdf33540c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007efdf279bf80 RCX: 00007efdf267cae9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007efdf26c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efdf279bf80 R15: 00007ffe34521818
 </TASK>

Allocated by task 10605:
 kasan_save_stack+0x33/0x50 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+0xa2/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 ceph_init_fs_context+0xc8/0x530 fs/ceph/super.c:1333
 alloc_fs_context+0x56c/0x9f0 fs/fs_context.c:294
 __do_sys_fsopen fs/fsopen.c:137 [inline]
 __se_sys_fsopen fs/fsopen.c:115 [inline]
 __x64_sys_fsopen+0xeb/0x230 fs/fsopen.c:115
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 10605:
 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+0xb8/0x2f0 mm/slub.c:3814
 destroy_mount_options fs/ceph/super.c:599 [inline]
 destroy_mount_options+0xe9/0x140 fs/ceph/super.c:588
 destroy_fs_client+0x1b6/0x2b0 fs/ceph/super.c:860
 deactivate_locked_super+0xa0/0x2d0 fs/super.c:454
 ceph_get_tree+0x1270/0x1910 fs/ceph/super.c:1267
 vfs_get_tree+0x8c/0x370 fs/super.c:1711
 vfs_cmd_create+0x11f/0x2f0 fs/fsopen.c:230
 vfs_fsconfig_locked fs/fsopen.c:294 [inline]
 __do_sys_fsconfig+0x832/0xb90 fs/fsopen.c:475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

Second to last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372
 cfg80211_update_known_bss+0x821/0xa80 net/wireless/scan.c:1744
 __cfg80211_bss_update+0x1ba/0x2540 net/wireless/scan.c:1788
 cfg80211_inform_single_bss_frame_data+0x7e7/0xf30 net/wireless/scan.c:2881
 cfg80211_inform_bss_frame_data+0xbf/0x290 net/wireless/scan.c:2912
 ieee80211_bss_info_update+0x37b/0x9a0 net/mac80211/scan.c:211
 ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1613 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x195f/0x2ee0 net/mac80211/ibss.c:1642
 ieee80211_iface_process_skb net/mac80211/iface.c:1604 [inline]
 ieee80211_iface_work+0xa1f/0xd40 net/mac80211/iface.c:1658
 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435
 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

The buggy address belongs to the object at ffff88807c497780
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 1 bytes inside of
 freed 96-byte region [ffff88807c497780, ffff88807c4977e0)

The buggy address belongs to the physical page:
page:ffffea0001f125c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807c497280 pfn:0x7c497
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000200 ffff888012841780 ffffea0001219e10 ffffea0001e67450
raw: ffff88807c497280 0000000000200019 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5119, tgid 5119 (kworker/0:4), ts 95354580631, free_ts 95274446540
 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:2298
 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]
 __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3509
 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1076
 kmalloc include/linux/slab.h:582 [inline]
 kzalloc include/linux/slab.h:703 [inline]
 nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline]
 nsim_fib_event_nb+0x1b2/0xeb0 drivers/net/netdevsim/fib.c:1043
 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
 atomic_notifier_call_chain+0x73/0x1c0 kernel/notifier.c:231
 call_fib_notifiers+0x33/0x70 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:404 [inline]
 fib6_add_rt2node net/ipv6/ip6_fib.c:1229 [inline]
 fib6_add+0x25bf/0x4700 net/ipv6/ip6_fib.c:1483
 __ip6_ins_rt net/ipv6/route.c:1300 [inline]
 ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1310
 __ipv6_ifa_notify+0xc9b/0x11d0 net/ipv6/addrconf.c:6205
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]
 kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3515
 __alloc_skb+0x287/0x330 net/core/skbuff.c:634
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6299
 sock_alloc_send_pskb+0x7c8/0x950 net/core/sock.c:2794
 unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:728 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:751
 __sys_sendto+0x255/0x340 net/socket.c:2174
 __do_sys_sendto net/socket.c:2186 [inline]
 __se_sys_sendto net/socket.c:2182 [inline]
 __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2182
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807c497680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88807c497780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff88807c497800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807c497880: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
ceph: No mds server is up or the cluster is laggy