================================================================== BUG: KASAN: use-after-free in rose_timer_expiry+0x404/0x45c net/rose/rose_timer.c:183 Read of size 2 at addr ffff0000f23dd82a by task ksoftirqd/1/21 CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.145-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x220 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:427 kasan_report+0xa8/0x100 mm/kasan/report.c:531 __asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349 rose_timer_expiry+0x404/0x45c net/rose/rose_timer.c:183 call_timer_fn+0x1b8/0x964 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x460/0x6bc kernel/time/timer.c:1820 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833 handle_softirqs+0x318/0xc6c kernel/softirq.c:596 run_ksoftirqd+0x7c/0x2a0 kernel/softirq.c:963 smpboot_thread_fn+0x4b0/0x964 kernel/smpboot.c:164 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:849 Allocated by task 6531: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc_node_track_caller+0xe0/0x16c mm/slab_common.c:956 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x264/0x718 net/core/skbuff.c:515 skb_copy+0x104/0x5f0 net/core/skbuff.c:1732 mac80211_hwsim_tx_frame_no_nl+0xb14/0x10d0 drivers/net/wireless/mac80211_hwsim.c:1729 mac80211_hwsim_tx_frame+0x1c0/0x1f4 drivers/net/wireless/mac80211_hwsim.c:2058 mac80211_hwsim_beacon_tx+0x4c8/0x914 drivers/net/wireless/mac80211_hwsim.c:2121 __iterate_interfaces+0x204/0x484 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd4/0x180 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xc8/0x1b8 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1752 [inline] __hrtimer_run_queues+0x44c/0xc64 kernel/time/hrtimer.c:1816 hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1833 handle_softirqs+0x318/0xc6c kernel/softirq.c:596 __do_softirq+0x14/0x20 kernel/softirq.c:630 The buggy address belongs to the object at ffff0000f23dd800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 42 bytes inside of 512-byte region [ffff0000f23dd800, ffff0000f23dda00) The buggy address belongs to the physical page: page:00000000f573acc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000f23df000 pfn:0x1323dc head:00000000f573acc8 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003639008 fffffc00036be508 ffff0000c0002600 raw: ffff0000f23df000 0000000000100004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f23dd700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f23dd780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000f23dd800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000f23dd880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f23dd900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================