ci2 starts bisection 2026-10-04 00:54:33.592431275 +0000 UTC m=+113491.175758615 bisecting fixing commit since 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 building syzkaller on 0909d65fc692e54fa1900b68b476e89207bc7f34 ensuring issue is reproducible on original commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b62e9c3eee273597fadaf7f1bd600f49fb18a7e4a89bd4b8abbdb30d48ddfe7b all runs: crashed: general protection fault in ovl_lookup_single representative crash: general protection fault in ovl_lookup_single, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f2bef0f768e7346fd15d0237b214b460598a4cac627f5cd597e5f1ef327aa6ad all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 into 5 parts testing without sub-chunk 1/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 77171f58db8b45dcd60aa677ee5a55e9318ddc1eeb3a8f089ba39d5637707268 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 160af28044dafc8ab78adb71c730c62d5c9669d821d7b4d749b80c89784d4a12 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: fdf6330cfcec69a09b496c7be262e69c1dbce713578811aad9e083101c093e06 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 736c6647744f565533a5396fa47052e1d7904401d23181f0bca98195b09c648d all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building 05eea940894a0a7e5c1f6e91dff5b64bdbe45b31: net/socket.c:1188:(.text+0x210b): undefined reference to `wext_handle_ioctl' net/socket.c:3389:(.text+0x235f): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343:(.text+0x109): undefined reference to `wext_proc_exit' net/core/net-procfs.c:327:(.text+0x1e4): undefined reference to `wext_proc_init' minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM USB_XHCI_PCI_RENESAS WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing current HEAD f5eaed2bbe33b10b297b366bb5d02819356b5c13 testing commit f5eaed2bbe33b10b297b366bb5d02819356b5c13 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3479a51acc32cfe31f77ca1e4db9403d569bf3aee15f2257b965501e29a33320 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single representative crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h45m57.905860998s (build: 21m6.934158739s, test: 1h8m35.234032051s) crash still not fixed or there were kernel test errors commit msg: Merge 9f30ba9aa027 ("tcp: clear sock_ops cb flags before force-closing a child socket") into android13-5.15-lts crash: BUG: unable to handle kernel NULL pointer dereference in ovl_lookup_single BUG: kernel NULL pointer dereference, address: 0000000000000016 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 109b46067 P4D 109b46067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 452 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:ovl_lookup_positive_unlocked fs/overlayfs/namei.c:207 [inline] RIP: 0010:ovl_lookup_single+0x42/0x2c0 fs/overlayfs/namei.c:230 Code: 48 89 f3 4c 89 d6 48 83 ec 08 4c 89 45 d0 44 8b 75 18 45 0f b6 39 e8 4d 0a ea ff 48 3d 00 f0 ff ff 49 89 c5 0f 87 b8 01 00 00 <8b> 00 a9 00 00 70 00 75 27 45 84 f6 74 0b 41 83 7d 5c 01 0f 84 bc RSP: 0018:ffffc90000397c70 EFLAGS: 00010203 RAX: 0000000000000016 RBX: ffffc90000397d78 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff888109aab780 RDI: 00000000ffffffff RBP: ffffc90000397ca0 R08: 0000000000000006 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82c4f7ca R13: 0000000000000016 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fbc483aa6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000016 CR3: 000000010a138000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ovl_lookup_layer+0x132/0x140 fs/overlayfs/namei.c:314 ovl_lookup+0x224/0xa50 fs/overlayfs/namei.c:914 lookup_one_qstr_excl+0x65/0xa0 fs/namei.c:1571 filename_create+0xa8/0x150 fs/namei.c:3844 do_mkdirat+0x43/0x120 fs/namei.c:4088 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x4a/0x70 fs/namei.c:4111 x64_sys_call+0x2e4/0x990 arch/x86/include/generated/asm/syscalls_64.h:259 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fbc48547e59 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:00007fbc483aa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fbc487c0fa0 RCX: 00007fbc48547e59 RDX: 0000000000000000 RSI: 0000200000002000 RDI: ffffffffffffff9c RBP: 00007fbc485ddd6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbc487c1038 R14: 00007fbc487c0fa0 R15: 00007fff0f56c1f8 Modules linked in: CR2: 0000000000000016 ---[ end trace 364b9e6062cc8162 ]--- RIP: 0010:ovl_lookup_positive_unlocked fs/overlayfs/namei.c:207 [inline] RIP: 0010:ovl_lookup_single+0x42/0x2c0 fs/overlayfs/namei.c:230 Code: 48 89 f3 4c 89 d6 48 83 ec 08 4c 89 45 d0 44 8b 75 18 45 0f b6 39 e8 4d 0a ea ff 48 3d 00 f0 ff ff 49 89 c5 0f 87 b8 01 00 00 <8b> 00 a9 00 00 70 00 75 27 45 84 f6 74 0b 41 83 7d 5c 01 0f 84 bc RSP: 0018:ffffc90000397c70 EFLAGS: 00010203 RAX: 0000000000000016 RBX: ffffc90000397d78 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff888109aab780 RDI: 00000000ffffffff RBP: ffffc90000397ca0 R08: 0000000000000006 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82c4f7ca R13: 0000000000000016 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fbc483aa6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000016 CR3: 000000010a138000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 f3 mov %rsi,%rbx 3: 4c 89 d6 mov %r10,%rsi 6: 48 83 ec 08 sub $0x8,%rsp a: 4c 89 45 d0 mov %r8,-0x30(%rbp) e: 44 8b 75 18 mov 0x18(%rbp),%r14d 12: 45 0f b6 39 movzbl (%r9),%r15d 16: e8 4d 0a ea ff call 0xffea0a68 1b: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 21: 49 89 c5 mov %rax,%r13 24: 0f 87 b8 01 00 00 ja 0x1e2 * 2a: 8b 00 mov (%rax),%eax <-- trapping instruction 2c: a9 00 00 70 00 test $0x700000,%eax 31: 75 27 jne 0x5a 33: 45 84 f6 test %r14b,%r14b 36: 74 0b je 0x43 38: 41 83 7d 5c 01 cmpl $0x1,0x5c(%r13) 3d: 0f .byte 0xf 3e: 84 .byte 0x84 3f: bc .byte 0xbc