| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2026/07/01 | lts (merge base) | 64ee49df839f | C | [report] lost connection to test machine |
| 2026/07/01 | upstream (ToT) | 665159e24674 | C | [report] lost connection to test machine |
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| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2026/07/01 | lts (merge base) | 64ee49df839f | C | [report] lost connection to test machine |
| 2026/07/01 | upstream (ToT) | 665159e24674 | C | [report] lost connection to test machine |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| android-6-1 | KASAN: use-after-free Write in rcu_segcblist_enqueue | 22 | C | 78 | 2h18m | 26d | 0/2 | upstream: reported C repro on 2026/06/14 23:49 | ||
| android-5-10 | KASAN: use-after-free Write in rcu_segcblist_enqueue | 22 | C | 63 | 11h32m | 18d | 0/2 | upstream: reported C repro on 2026/06/22 22:11 | ||
| upstream | general protection fault in rcu_segcblist_enqueue kvm-x86 | 2 | C | done | done | 368 | 1768d | 1832d | 20/29 | fixed on 2022/03/08 16:11 |
================================================================== BUG: KASAN: use-after-free in rcu_segcblist_enqueue+0x9c/0xb0 kernel/rcu/rcu_segcblist.c:348 Write of size 8 at addr ffff88811dd73190 by task syz.2.17/371 CPU: 0 PID: 371 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <TASK> __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:314 rcu_segcblist_enqueue+0x9c/0xb0 kernel/rcu/rcu_segcblist.c:348 __call_rcu_common kernel/rcu/tree.c:3030 [inline] call_rcu+0x549/0xf60 kernel/rcu/tree.c:3129 security_inode_free+0xb4/0xd0 security/security.c:1066 __destroy_inode+0x175/0x4f0 fs/inode.c:289 destroy_inode fs/inode.c:312 [inline] evict+0x769/0x8b0 fs/inode.c:665 iput_final fs/inode.c:1779 [inline] iput+0x651/0x7e0 fs/inode.c:1805 dentry_unlink_inode+0x338/0x3e0 fs/dcache.c:380 __dentry_kill+0x45b/0x660 fs/dcache.c:586 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x47/0x90 fs/dcache.c:893 __fput+0x5c7/0x900 fs/file_table.c:319 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fbdb74a2e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffbc2c4da8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fffbc2c4e90 RCX: 00007fbdb74a2e59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00000000000066a8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b32d20000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbdb772afac R14: 00007fbdb772afa8 R15: 00007fbdb772afa0 </TASK> Allocated by task 371: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:624 [inline] kzalloc include/linux/slab.h:750 [inline] l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772 __sys_connect_file net/socket.c:1922 [inline] __sys_connect+0x3cb/0x450 net/socket.c:1939 __do_sys_connect net/socket.c:1949 [inline] __se_sys_connect net/socket.c:1946 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1946 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 45: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kfree+0xc4/0x270 mm/slub.c:4588 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline] l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589 l2tp_tunnel_closeall net/l2tp/l2tp_core.c:1235 [inline] l2tp_tunnel_del_work+0x180/0x3d0 net/l2tp/l2tp_core.c:1273 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3011 [inline] call_rcu+0x10b/0xf60 kernel/rcu/tree.c:3129 pppol2tp_release+0x1e3/0x2b0 net/l2tp/l2tp_ppp.c:447 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1335 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88811dd73000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 400 bytes inside of 512-byte region [ffff88811dd73000, ffff88811dd73200) The buggy address belongs to the page: page:ffffea0004775c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dd70 head:ffffea0004775c00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 371, ts 26300828251, free_ts 25213483363 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x16a/0x2c0 mm/slub.c:4432 kmalloc include/linux/slab.h:624 [inline] kzalloc include/linux/slab.h:750 [inline] l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772 __sys_connect_file net/socket.c:1922 [inline] __sys_connect+0x3cb/0x450 net/socket.c:1939 __do_sys_connect net/socket.c:1949 [inline] __se_sys_connect net/socket.c:1946 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1946 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __vunmap+0x801/0x980 mm/vmalloc.c:2660 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 kcov_put kernel/kcov.c:417 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:519 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xb70/0x29a0 kernel/exit.c:890 do_group_exit+0x149/0x310 kernel/exit.c:1004 get_signal+0x64f/0x1430 kernel/signal.c:2907 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 Memory state around the buggy address: ffff88811dd73080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811dd73100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88811dd73180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811dd73200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811dd73280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/07/07 18:30 | android13-5.15-lts | 5c01a18cdaee | 76cdc0c0 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | |
| 2026/07/07 06:33 | android13-5.15-lts | 2ceba11ffa52 | 8e71ce95 | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | |
| 2026/06/29 08:33 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | |
| 2026/07/03 18:27 | android13-5.15-lts | a64de05eba09 | 58bf2096 | .config | console log | report | syz / log | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/08 12:31 | android13-5.15-lts | 5c01a18cdaee | 88a4b44c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/06 04:27 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/05 16:08 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/05 04:46 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/05 04:42 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/05 04:42 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/04 16:41 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/04 14:59 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/04 07:56 | android13-5.15-lts | a64de05eba09 | fcece630 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/07/01 01:46 | android13-5.15-lts | c85054db4618 | 00e8b0fd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/29 08:15 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/29 07:04 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/29 06:36 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/29 01:07 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/28 16:40 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/28 04:47 | android13-5.15-lts | c85054db4618 | fb92f11c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/25 16:34 | android13-5.15-lts | c85054db4618 | cfa969bf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/24 23:40 | android13-5.15-lts | c85054db4618 | 302586aa | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue | ||
| 2026/06/22 14:14 | android13-5.15-lts | 7ad09e849dbe | 43bfcdb0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-15 | KASAN: use-after-free Write in rcu_segcblist_enqueue |