================================================================== BUG: KASAN: invalid-access in hlist_move_list include/linux/list.h:967 [inline] BUG: KASAN: invalid-access in collect_expired_timers kernel/time/timer.c:1483 [inline] BUG: KASAN: invalid-access in __run_timers.part.0+0xc0/0x230 kernel/time/timer.c:1720 Write at addr f4ff00002642eda0 by task kworker/u4:1/12551 Pointer tag: [f4], memory tag: [fe] CPU: 1 PID: 12551 Comm: kworker/u4:1 Not tainted 5.11.0-rc7-syzkaller-00090-gdcc0b49040c7 #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x1b0 arch/arm64/kernel/stacktrace.c:117 show_stack+0x18/0x70 arch/arm64/kernel/stacktrace.c:196 __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xd0/0x12c lib/dump_stack.c:120 print_address_description+0x70/0x29c mm/kasan/report.c:230 __kasan_report mm/kasan/report.c:396 [inline] kasan_report+0x134/0x380 mm/kasan/report.c:413 report_tag_fault arch/arm64/mm/fault.c:311 [inline] do_tag_recovery arch/arm64/mm/fault.c:325 [inline] __do_kernel_fault+0x178/0x1bc arch/arm64/mm/fault.c:369 do_bad_area arch/arm64/mm/fault.c:462 [inline] do_tag_check_fault+0x74/0x90 arch/arm64/mm/fault.c:717 do_mem_abort+0x44/0xbc arch/arm64/mm/fault.c:793 el1_abort+0x40/0x6c arch/arm64/kernel/entry-common.c:118 el1_sync_handler+0xac/0xd0 arch/arm64/kernel/entry-common.c:209 el1_sync+0x70/0x100 arch/arm64/kernel/entry.S:656 hlist_move_list include/linux/list.h:967 [inline] collect_expired_timers kernel/time/timer.c:1483 [inline] __run_timers.part.0+0xc0/0x230 kernel/time/timer.c:1720 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0x3c/0x7c kernel/time/timer.c:1744 _stext+0x124/0x2ac do_softirq_own_stack include/linux/interrupt.h:577 [inline] invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit+0xdc/0xfc kernel/softirq.c:444 __handle_domain_irq+0x80/0xe0 kernel/irq/irqdesc.c:692 handle_domain_irq include/linux/irqdesc.h:176 [inline] gic_handle_irq+0x50/0xd0 drivers/irqchip/irq-gic.c:370 el1_irq+0xb4/0x180 arch/arm64/kernel/entry.S:669 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:124 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x10/0x50 kernel/locking/spinlock.c:191 free_pages_and_swap_cache+0xdc/0xfc mm/swap_state.c:355 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu mm/mmu_gather.c:249 [inline] tlb_finish_mmu+0x80/0x20c mm/mmu_gather.c:328 exit_mmap+0xf0/0x180 mm/mmap.c:3222 __mmput+0x3c/0x140 kernel/fork.c:1082 mmput+0x48/0x54 kernel/fork.c:1103 free_bprm+0x2c/0xc0 fs/exec.c:1477 kernel_execve+0x130/0x1a0 fs/exec.c:1971 call_usermodehelper_exec_async+0xcc/0x140 kernel/umh.c:110 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958 Allocated by task 12322: stack_trace_save+0x50/0x80 kernel/stacktrace.c:121 kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc+0xe8/0x160 mm/kasan/common.c:429 __kasan_kmalloc+0x14/0x20 mm/kasan/common.c:443 kasan_kmalloc include/linux/kasan.h:219 [inline] __kmalloc_node+0x1d0/0x3ac mm/slub.c:4033 kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x40/0xe0 mm/util.c:587 kvmalloc include/linux/mm.h:781 [inline] kvzalloc include/linux/mm.h:789 [inline] alloc_netdev_mqs+0x5c/0x3bc net/core/dev.c:10546 rtnl_create_link+0xc8/0x2b0 net/core/rtnetlink.c:3171 veth_newlink+0x110/0x38c drivers/net/veth.c:1347 __rtnl_newlink+0x604/0x800 net/core/rtnetlink.c:3443 rtnl_newlink+0x70/0xa0 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x118/0x334 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x5c/0x130 net/netlink/af_netlink.c:2494 rtnetlink_rcv+0x18/0x2c net/core/rtnetlink.c:5571 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x25c/0x320 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x1d4/0x3e4 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x54/0x60 net/socket.c:672 __sys_sendto+0x118/0x14c net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __arm64_sys_sendto+0x2c/0x40 net/socket.c:1983 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall arch/arm64/kernel/syscall.c:49 [inline] el0_svc_common.constprop.0+0x74/0x190 arch/arm64/kernel/syscall.c:159 do_el0_svc+0x74/0x90 arch/arm64/kernel/syscall.c:198 el0_svc+0x14/0x20 arch/arm64/kernel/entry-common.c:365 el0_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:381 el0_sync+0x190/0x1c0 arch/arm64/kernel/entry.S:699 Freed by task 163: stack_trace_save+0x50/0x80 kernel/stacktrace.c:121 kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track+0x28/0x40 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/hw_tags.c:174 ____kasan_slab_free.constprop.0+0x184/0x1c0 mm/kasan/common.c:362 __kasan_slab_free+0x10/0x20 mm/kasan/common.c:369 kasan_slab_free include/linux/kasan.h:192 [inline] slab_free_hook mm/slub.c:1547 [inline] slab_free_freelist_hook+0x98/0x18c mm/slub.c:1580 slab_free mm/slub.c:3143 [inline] kfree+0x324/0x4a0 mm/slub.c:4139 kvfree+0x3c/0x50 mm/util.c:616 netdev_freemem+0x18/0x2c net/core/dev.c:10500 netdev_release+0x30/0x44 net/core/net-sysfs.c:1828 device_release+0x34/0x90 drivers/base/core.c:1980 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x74/0x120 lib/kobject.c:753 netdev_run_todo+0x2d0/0x37c net/core/dev.c:10356 rtnl_unlock+0x10/0x20 net/core/rtnetlink.c:112 default_device_exit_batch+0x168/0x1a0 net/core/dev.c:11220 ops_exit_list+0x64/0x80 net/core/net_namespace.c:190 cleanup_net+0x23c/0x410 net/core/net_namespace.c:604 process_one_work+0x1d8/0x360 kernel/workqueue.c:2275 worker_thread+0x70/0x434 kernel/workqueue.c:2421 kthread+0x174/0x180 kernel/kthread.c:292 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958 The buggy address belongs to the object at ffff00002642e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3488 bytes inside of 4096-byte region [ffff00002642e000, ffff00002642f000) The buggy address belongs to the page: page:00000000490ed195 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x66428 head:00000000490ed195 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x1ffffc000010200(slab|head) raw: 01ffffc000010200 dead000000000100 dead000000000122 f7ff000004801900 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00002642eb00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff00002642ec00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff00002642ed00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff00002642ee00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff00002642ef00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ==================================================================