================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088 Write of size 4 at addr ffff0000ca821ff0 by task syz-executor.5/15057 CPU: 1 PID: 15057 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-18302-g596b6b709632 #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 21: 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 __netdev_alloc_skb+0xb8/0x3e8 net/core/skbuff.c:630 netdev_alloc_skb include/linux/skbuff.h:3158 [inline] dev_alloc_skb include/linux/skbuff.h:3171 [inline] __ieee80211_beacon_get+0x6d8/0x19dc net/mac80211/tx.c:5316 ieee80211_beacon_get_tim+0xb4/0x490 net/mac80211/tx.c:5398 ieee80211_beacon_get include/net/mac80211.h:5271 [inline] mac80211_hwsim_beacon_tx+0x1e4/0x8ec drivers/net/wireless/mac80211_hwsim.c:2086 __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 Freed by task 21: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:523 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3800 kfree+0xfc/0x220 mm/slab_common.c:1020 skb_free_head net/core/skbuff.c:822 [inline] skb_release_data+0x48c/0x6b4 net/core/skbuff.c:851 skb_release_all net/core/skbuff.c:916 [inline] __kfree_skb net/core/skbuff.c:930 [inline] consume_skb+0xa4/0x17c net/core/skbuff.c:1098 mac80211_hwsim_tx_frame+0x1cc/0x1f8 drivers/net/wireless/mac80211_hwsim.c:2054 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 The buggy address belongs to the object at ffff0000ca821c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 496 bytes to the right of 512-byte region [ffff0000ca821c00, ffff0000ca821e00) The buggy address belongs to the physical page: page:00000000174cffcb refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000ca821000 pfn:0x10a820 head:00000000174cffcb order:2 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 ksm flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002600 fffffc0004cb9800 dead000000000003 raw: ffff0000ca821000 000000008010000b 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000ca821e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000ca821f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000ca821f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000ca822000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000ca822080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================