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2002:a05:6820:1693:b0:6a3:10fc:766d with SMTP id 006d021491bc7-6a36da71c03mr5771854eaf.47.1783614808551; Thu, 09 Jul 2026 09:33:28 -0700 (PDT) Date: Thu, 09 Jul 2026 09:33:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a4fcd58.a1ad617e.25832.000e.GAE@google.com> Subject: [syzbot] [wireless?] KASAN: slab-out-of-bounds Read in ieee80211_ie_split_ric (3) From: syzbot To: johannes@sipsolutions.net, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a52d6c7160f7 selftests/arm64: fix spelling errors in comme.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=17ddd739580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ecdef466b08b9772 dashboard link: https://syzkaller.appspot.com/bug?extid=cc867e537e4bd36f69bb compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13940432580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156e7d89580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/af2ea186884f/disk-a52d6c71.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cef93b18732f/vmlinux-a52d6c71.xz kernel image: https://storage.googleapis.com/syzbot-assets/b9f9b8922f14/Image-a52d6c71.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cc867e537e4bd36f69bb@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in skip_ie net/wireless/util.c:2068 [inline] BUG: KASAN: slab-out-of-bounds in ieee80211_ie_split_ric+0x4a8/0x508 net/wireless/util.c:-1 Read of size 1 at addr ffff0000c2aac9c1 by task syz.0.18/4930 CPU: 0 UID: 0 PID: 4930 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xb0/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 skip_ie net/wireless/util.c:2068 [inline] ieee80211_ie_split_ric+0x4a8/0x508 net/wireless/util.c:-1 ieee80211_ie_split include/net/cfg80211.h:10226 [inline] cfg80211_sme_get_conn_ies net/wireless/sme.c:529 [inline] cfg80211_sme_connect net/wireless/sme.c:586 [inline] cfg80211_connect+0xca8/0x1be4 net/wireless/sme.c:1528 cfg80211_mgd_wext_connect+0x3ac/0x508 net/wireless/wext-sme.c:57 cfg80211_mgd_wext_siwessid+0x2c4/0x40c net/wireless/wext-sme.c:184 cfg80211_wext_siwessid+0xc4/0x13c net/wireless/wext-compat.c:1415 ioctl_standard_iw_point+0x678/0xb04 net/wireless/wext-core.c:864 ioctl_standard_call+0xb4/0x178 net/wireless/wext-core.c:1049 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline] wext_ioctl_dispatch+0x104/0x36c net/wireless/wext-core.c:1013 wext_handle_ioctl+0x154/0x288 net/wireless/wext-core.c:1074 sock_ioctl+0x154/0x7ec net/socket.c:1353 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Allocated by task 4930: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5362 [inline] __kmalloc_node_track_caller_noprof+0x434/0x6d4 mm/slub.c:5497 kmemdup_noprof+0x44/0x8c mm/util.c:138 kmemdup_noprof include/linux/fortify-string.h:715 [inline] cfg80211_wext_siwgenie+0x170/0x28c net/wireless/wext-sme.c:322 ioctl_standard_iw_point+0x678/0xb04 net/wireless/wext-core.c:864 ioctl_standard_call+0xb4/0x178 net/wireless/wext-core.c:1049 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline] wext_ioctl_dispatch+0x104/0x36c net/wireless/wext-core.c:1013 wext_handle_ioctl+0x154/0x288 net/wireless/wext-core.c:1074 sock_ioctl+0x154/0x7ec net/socket.c:1353 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 The buggy address belongs to the object at ffff0000c2aac9c0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of allocated 1-byte region [ffff0000c2aac9c0, ffff0000c2aac9c1) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000c2aaca20 pfn:0x102aac flags: 0x5ffc00000000200(workingset|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000200 ffff0000c0001500 ffff0000c0000348 fffffdffc30937d0 raw: ffff0000c2aaca20 0000000800800064 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c2aac880: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc ffff0000c2aac900: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc >ffff0000c2aac980: fa fc fc fc fa fc fc fc 01 fc fc fc fa fc fc fc ^ ffff0000c2aaca00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc ffff0000c2aaca80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc ================================================================== ------------[ cut here ]------------ memcpy: detected buffer overflow: 18446744073709551615 byte write of buffer size 0 WARNING: lib/string_helpers.c:1037 at __fortify_report+0xa0/0xb8 lib/string_helpers.c:1036, CPU#0: syz.0.18/4930 Modules linked in: CPU: 0 UID: 0 PID: 4930 Comm: syz.0.18 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __fortify_report+0xa0/0xb8 lib/string_helpers.c:1036 lr : __fortify_report+0xa0/0xb8 lib/string_helpers.c:1036 sp : ffff8000986876a0 x29: ffff8000986876a0 x28: 1fffe000199c09e6 x27: 1fffe000199c09da x26: ffff0000c2aac9c0 x25: 0000000000000001 x24: ffff0000d02ad200 x23: ffff0000cce04ed0 x22: ffff800086cbcad8 x21: 0000000000000001 x20: ffffffffffffffff x19: 0000000000000000 x18: 0000000000000000 x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : e75ac9114b2ee700 x8 : e75ac9114b2ee700 x7 : 0000000000000000 x6 : ffff80008048ce60 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f7010 x2 : 0000000100000000 x1 : ffff0000d1543a80 x0 : 0000000000000000 Call trace: __fortify_report+0xa0/0xb8 lib/string_helpers.c:1036 (P) __fortify_panic+0x10/0x14 lib/string_helpers.c:1043 fortify_memcpy_chk include/linux/fortify-string.h:547 [inline] cfg80211_sme_get_conn_ies net/wireless/sme.c:533 [inline] cfg80211_sme_connect net/wireless/sme.c:586 [inline] cfg80211_connect+0x1918/0x1be4 net/wireless/sme.c:1528 cfg80211_mgd_wext_connect+0x3ac/0x508 net/wireless/wext-sme.c:57 cfg80211_mgd_wext_siwessid+0x2c4/0x40c net/wireless/wext-sme.c:184 cfg80211_wext_siwessid+0xc4/0x13c net/wireless/wext-compat.c:1415 ioctl_standard_iw_point+0x678/0xb04 net/wireless/wext-core.c:864 ioctl_standard_call+0xb4/0x178 net/wireless/wext-core.c:1049 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline] wext_ioctl_dispatch+0x104/0x36c net/wireless/wext-core.c:1013 wext_handle_ioctl+0x154/0x288 net/wireless/wext-core.c:1074 sock_ioctl+0x154/0x7ec net/socket.c:1353 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 1077 hardirqs last enabled at (1077): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (1077): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (1076): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (1076): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (978): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (978): [] rcu_read_unlock_bh include/linux/rcupdate.h:914 [inline] softirqs last enabled at (978): [] __dev_queue_xmit+0x14d0/0x2ba4 net/core/dev.c:4907 softirqs last disabled at (972): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (972): [] rcu_read_lock_bh include/linux/rcupdate.h:893 [inline] softirqs last disabled at (972): [] __dev_queue_xmit+0x1fc/0x2ba4 net/core/dev.c:4793 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernel BUG at lib/string_helpers.c:1044! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 4930 Comm: syz.0.18 Tainted: G B W syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __fortify_panic+0x10/0x14 lib/string_helpers.c:1043 lr : __fortify_panic+0x10/0x14 lib/string_helpers.c:1043 sp : ffff8000986876d0 x29: ffff8000986876d0 x28: 1fffe000199c09e6 x27: 1fffe000199c09da x26: ffff0000c2aac9c0 x25: 0000000000000001 x24: ffff0000d02ad200 x23: ffff0000cce04ed0 x22: 0000000000000002 x21: 0000000000000000 x20: ffff0000e2cc0740 x19: ffffffffffffffff x18: 0000000000000000 x17: 3d3d3d3d3d3d3d3d x16: 3d3d3d3d3d3d3d3d x15: 3d3d3d3d3d3d3d3d x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : e75ac9114b2ee700 x8 : e75ac9114b2ee700 x7 : 0000000000000000 x6 : ffff80008048ce60 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f7010 x2 : 0000000100000000 x1 : ffff0000d1543a80 x0 : 0000000000000000 Call trace: __fortify_panic+0x10/0x14 lib/string_helpers.c:1043 (P) fortify_memcpy_chk include/linux/fortify-string.h:547 [inline] cfg80211_sme_get_conn_ies net/wireless/sme.c:533 [inline] cfg80211_sme_connect net/wireless/sme.c:586 [inline] cfg80211_connect+0x1918/0x1be4 net/wireless/sme.c:1528 cfg80211_mgd_wext_connect+0x3ac/0x508 net/wireless/wext-sme.c:57 cfg80211_mgd_wext_siwessid+0x2c4/0x40c net/wireless/wext-sme.c:184 cfg80211_wext_siwessid+0xc4/0x13c net/wireless/wext-compat.c:1415 ioctl_standard_iw_point+0x678/0xb04 net/wireless/wext-core.c:864 ioctl_standard_call+0xb4/0x178 net/wireless/wext-core.c:1049 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline] wext_ioctl_dispatch+0x104/0x36c net/wireless/wext-core.c:1013 wext_handle_ioctl+0x154/0x288 net/wireless/wext-core.c:1074 sock_ioctl+0x154/0x7ec net/socket.c:1353 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Code: d503233f a9bf7bfd 910003fd 94618cfa (d4210000) ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup