================================================================== BUG: KASAN: use-after-free in rose_timer_expiry+0x404/0x45c net/rose/rose_timer.c:183 Read of size 2 at addr ffff0000f103b02a by task syz.3.1377/9702 CPU: 1 PID: 9702 Comm: syz.3.1377 Not tainted 6.1.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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:578 __do_softirq+0x14/0x20 kernel/softirq.c:612 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:459 [inline] __irq_exit_rcu+0x23c/0x43c kernel/softirq.c:661 irq_exit_rcu+0x14/0x84 kernel/softirq.c:673 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] console_emit_next_record+0x7d0/0x954 kernel/printk/printk.c:2783 console_flush_all kernel/printk/printk.c:-1 [inline] console_unlock+0x240/0x57c kernel/printk/printk.c:2906 vprintk_emit+0x14c/0x2dc kernel/printk/printk.c:2303 vprintk_default+0x54/0x80 kernel/printk/printk.c:2318 vprintk+0x1e8/0x284 kernel/printk/printk_safe.c:45 _printk+0xd0/0x118 kernel/printk/printk.c:2328 ntfs_printk+0x350/0x3b4 fs/ntfs3/super.c:68 ntfs_read_mft fs/ntfs3/inode.c:85 [inline] ntfs_iget5+0x40c/0x2b10 fs/ntfs3/inode.c:525 dir_search_u+0x250/0x2a4 fs/ntfs3/dir.c:264 ntfs_extend_init+0x15c/0x444 fs/ntfs3/fsntfs.c:214 ntfs_fill_super+0x305c/0x32ac fs/ntfs3/super.c:1267 get_tree_bdev+0x358/0x544 fs/super.c:1366 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1383 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3057 path_mount+0x5b4/0xe78 fs/namespace.c:3387 do_mount fs/namespace.c:3400 [inline] __do_sys_mount fs/namespace.c:3608 [inline] __se_sys_mount fs/namespace.c:3585 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3585 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 8340: 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:1724 mac80211_hwsim_tx_frame+0x1c0/0x1f4 drivers/net/wireless/mac80211_hwsim.c:2053 mac80211_hwsim_beacon_tx+0x4c8/0x914 drivers/net/wireless/mac80211_hwsim.c:2116 __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:2142 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x44c/0xc64 kernel/time/hrtimer.c:1755 hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1772 handle_softirqs+0x318/0xc6c kernel/softirq.c:578 __do_softirq+0x14/0x20 kernel/softirq.c:612 The buggy address belongs to the object at ffff0000f103b000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 42 bytes inside of 512-byte region [ffff0000f103b000, ffff0000f103b200) The buggy address belongs to the physical page: page:000000005c7c7c35 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000f103b000 pfn:0x131038 head:000000005c7c7c35 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003cc5f08 fffffc0003c31d08 ffff0000c0002600 raw: ffff0000f103b000 000000000010000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f103af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f103af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000f103b000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000f103b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f103b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================