================================================================== BUG: KASAN: invalid-access in __hlist_del include/linux/list.h:839 [inline] BUG: KASAN: invalid-access in detach_timer kernel/time/timer.c:825 [inline] BUG: KASAN: invalid-access in expire_timers kernel/time/timer.c:1451 [inline] BUG: KASAN: invalid-access in __run_timers.part.0+0x1d0/0x230 kernel/time/timer.c:1731 Write at addr f6ff00002753cda0 by task syz-executor.1/6338 Pointer tag: [f6], memory tag: [fe] CPU: 0 PID: 6338 Comm: syz-executor.1 Not tainted 5.11.0-rc7-syzkaller-00115-gc6d8570e4d64 #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_del include/linux/list.h:839 [inline] detach_timer kernel/time/timer.c:825 [inline] expire_timers kernel/time/timer.c:1451 [inline] __run_timers.part.0+0x1d0/0x230 kernel/time/timer.c:1731 __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 tomoyo_path_matches_pattern+0x94/0xd0 security/tomoyo/util.c:956 tomoyo_compare_name_union security/tomoyo/file.c:87 [inline] tomoyo_compare_name_union security/tomoyo/file.c:82 [inline] tomoyo_check_path_number_acl+0x9c/0xb0 security/tomoyo/file.c:284 tomoyo_check_acl+0x64/0x124 security/tomoyo/domain.c:175 tomoyo_path_number_perm+0x170/0x20c security/tomoyo/file.c:733 tomoyo_file_ioctl+0x1c/0x30 security/tomoyo/tomoyo.c:329 security_file_ioctl+0x48/0x80 security/security.c:1482 __do_sys_ioctl fs/ioctl.c:747 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __arm64_sys_ioctl+0x48/0xec fs/ioctl.c:739 __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 Allocated by task 6338: 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 __rtnl_newlink+0x5bc/0x800 net/core/rtnetlink.c:3433 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 6338: 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 skb_free_head net/core/skbuff.c:604 [inline] pskb_expand_head+0x290/0x330 net/core/skbuff.c:1671 netlink_trim+0x98/0xe0 net/netlink/af_netlink.c:1286 netlink_broadcast_filtered+0x48/0x4e0 net/netlink/af_netlink.c:1491 netlink_broadcast net/netlink/af_netlink.c:1536 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0x38/0x140 net/netlink/af_netlink.c:2537 rtnl_notify net/core/rtnetlink.c:739 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:3818 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3833 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3821 [inline] rtmsg_ifinfo+0x70/0x9c net/core/rtnetlink.c:3839 __dev_notify_flags+0xa4/0xcc net/core/dev.c:8513 rtnl_configure_link+0x54/0xb4 net/core/rtnetlink.c:3135 __rtnl_newlink+0x620/0x800 net/core/rtnetlink.c:3451 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 The buggy address belongs to the object at ffff00002753c000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3488 bytes inside of 4096-byte region [ffff00002753c000, ffff00002753d000) The buggy address belongs to the page: page:0000000042d62ac2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x67538 head:0000000042d62ac2 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x1ffffc000010200(slab|head) raw: 01ffffc000010200 dead000000000100 dead000000000122 f8ff000004801900 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00002753cb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00002753cc00: fc fc fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff00002753cd00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff00002753ce00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff00002753cf00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ==================================================================