================================================================== BUG: KASAN: slab-out-of-bounds in dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127 Read of size 1 at addr ffff0000db1c6704 by task syz-executor.1/10080 CPU: 1 PID: 10080 Comm: syz-executor.1 Not tainted 5.15.146-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 dns_resolver_preparse+0xa98/0xaf8 net/dns_resolver/dns_key.c:127 key_create_or_update+0x43c/0xa38 security/keys/key.c:861 __do_sys_add_key security/keys/keyctl.c:134 [inline] __se_sys_add_key security/keys/keyctl.c:74 [inline] __arm64_sys_add_key+0x440/0x578 security/keys/keyctl.c:74 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 10080: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node+0x2c0/0x5b8 mm/slub.c:4455 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x88/0x204 mm/util.c:619 kvmalloc include/linux/mm.h:805 [inline] __do_sys_add_key security/keys/keyctl.c:116 [inline] __se_sys_add_key security/keys/keyctl.c:74 [inline] __arm64_sys_add_key+0x29c/0x578 security/keys/keyctl.c:74 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596 cfg80211_update_known_bss+0x13c/0x7e0 cfg80211_bss_update+0x160/0x1c64 net/wireless/scan.c:1771 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2488 [inline] cfg80211_inform_bss_frame_data+0x7f0/0x1dc4 net/wireless/scan.c:2521 ieee80211_bss_info_update+0x648/0xab0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline] ieee80211_ibss_rx_queued_mgmt+0x7d8/0x2814 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1441 [inline] ieee80211_iface_work+0x5b4/0xa80 net/mac80211/iface.c:1495 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Second to last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596 cfg80211_update_known_bss+0x13c/0x7e0 cfg80211_bss_update+0x160/0x1c64 net/wireless/scan.c:1771 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2488 [inline] cfg80211_inform_bss_frame_data+0x7f0/0x1dc4 net/wireless/scan.c:2521 ieee80211_bss_info_update+0x648/0xab0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline] ieee80211_ibss_rx_queued_mgmt+0x7d8/0x2814 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1441 [inline] ieee80211_iface_work+0x5b4/0xa80 net/mac80211/iface.c:1495 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000db1c6700 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 4 bytes inside of 128-byte region [ffff0000db1c6700, ffff0000db1c6780) The buggy address belongs to the page: page:000000006724624f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11b1c6 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 fffffc0003670700 0000000200000002 ffff0000c0002300 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000db1c6600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000db1c6680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000db1c6700: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000db1c6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000db1c6800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================