================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088 Write of size 4 at addr ffff00012fc527f0 by task syz-executor.5/22170 CPU: 1 PID: 22170 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-18300-g2ebd1fbb946d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:417 kasan_report+0xd4/0x130 mm/kasan/report.c:517 __asan_report_store_n_noabort+0x28/0x34 mm/kasan/report_generic.c:367 udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088 udf_add_entry+0x11e0/0x28b0 fs/udf/namei.c:482 udf_mkdir+0x158/0x7e0 fs/udf/namei.c:681 vfs_mkdir+0x334/0x4e4 fs/namei.c:4036 do_mkdirat+0x200/0x5f8 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4074 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 20934: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:512 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc_node_track_caller+0xd0/0x1c0 mm/slab_common.c:988 kmalloc_reserve net/core/skbuff.c:492 [inline] __alloc_skb+0x180/0x324 net/core/skbuff.c:565 skb_copy+0xcc/0x670 net/core/skbuff.c:1779 mac80211_hwsim_tx_frame_no_nl+0xdf0/0x1638 drivers/net/wireless/mac80211_hwsim.c:1724 mac80211_hwsim_tx_frame+0x1c4/0x1f8 drivers/net/wireless/mac80211_hwsim.c:2053 mac80211_hwsim_beacon_tx+0x4f0/0x8ec drivers/net/wireless/mac80211_hwsim.c:2116 __iterate_interfaces+0x204/0x460 net/mac80211/util.c:763 ieee80211_iterate_active_interfaces_atomic+0xb4/0x140 net/mac80211/util.c:799 mac80211_hwsim_beacon+0xcc/0x1c8 drivers/net/wireless/mac80211_hwsim.c:2142 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x580/0x10a8 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x158/0x220 kernel/time/hrtimer.c:1766 __do_softirq+0x368/0xfa4 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:493 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:503 kvfree_call_rcu+0xb4/0x6c8 kernel/rcu/tree.c:3376 ma_put+0x10c/0x198 net/ipv6/mcast.c:869 __ipv6_dev_mc_dec+0x294/0x304 net/ipv6/mcast.c:982 ipv6_mc_destroy_dev+0x2d0/0x4d4 net/ipv6/mcast.c:2800 addrconf_ifdown+0x135c/0x1790 net/ipv6/addrconf.c:3898 addrconf_notify+0x304/0xc74 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1936 [inline] call_netdevice_notifiers_extack net/core/dev.c:1974 [inline] call_netdevice_notifiers net/core/dev.c:1988 [inline] unregister_netdevice_many_notify+0xe88/0x1988 net/core/dev.c:10831 unregister_netdevice_many net/core/dev.c:10887 [inline] default_device_exit_batch+0x6c8/0x744 net/core/dev.c:11340 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x5dc/0x8d0 net/core/net_namespace.c:613 process_one_work+0x848/0x16b4 kernel/workqueue.c:2289 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:493 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:503 insert_work+0x64/0x384 kernel/workqueue.c:1358 __queue_work+0xdc4/0x1484 kernel/workqueue.c:1517 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:1643 call_timer_fn+0x250/0xc94 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1746 [inline] __run_timers+0x5b4/0x734 kernel/time/timer.c:2022 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035 __do_softirq+0x368/0xfa4 kernel/softirq.c:571 The buggy address belongs to the object at ffff00012fc52400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 496 bytes to the right of 512-byte region [ffff00012fc52400, ffff00012fc52600) The buggy address belongs to the physical page: page:00000000587864df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fc50 head:00000000587864df order:2 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 anon flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002600 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00012fc52680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00012fc52700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff00012fc52780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff00012fc52800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff00012fc52880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================