ci2 starts bisection 2026-08-04 13:22:36.971953944 +0000 UTC m=+704.387943166 bisecting fixing commit since c85054db46181ee85f10be997f41b347c85bd89b building syzkaller on fff8d0a0e302881e84edbe2230016e3bec252ec6 ensuring issue is reproducible on original commit c85054db46181ee85f10be997f41b347c85bd89b testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8977268a3a31ba8158f7748f7a93b3e836abd8cf972e0c32a6dc501f43562894 all runs: crashed: general protection fault in step_into representative crash: general protection fault in step_into, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b68adfdaa64ef1a3aea939c0a7b6a391e57fbb148131d3c00feaec87ba5c0d7b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], 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 c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8856ad18ab175191b4e8b3d37810d2f9c70bbfbf33b7190f608ecb1ac8150c23 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 05c51c08fdd5a083532b46e5572aae8198bb554f052f9879479f4fa7f786b9b5 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8a4a628895addcc08c18a6af9a4c496d9e42923a138ba511bd777f018a92a221 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 182b5e45ca917ee5859e634ece113df6414c7db655a140df38ef185a6f632766 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building c85054db46181ee85f10be997f41b347c85bd89b: 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD b885b84af7a2261321f1e4445bdd80290ff44655 testing commit b885b84af7a2261321f1e4445bdd80290ff44655 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 244d3e609daf34bceead8ffc9047ac9944fa1279f41f6697279fa92d7cc395e6 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in step_into representative crash: BUG: unable to handle kernel NULL pointer dereference in step_into, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 3h11m48.915154359s (build: 31m48.652935396s, test: 59m30.213989113s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.15 into android13-5.15-lts crash: BUG: unable to handle kernel NULL pointer dereference in step_into BUG: kernel NULL pointer dereference, address: 0000000000000007 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 1160dc067 P4D 1160dc067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 453 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:traverse_mounts fs/namei.c:1386 [inline] RIP: 0010:handle_mounts fs/namei.c:1506 [inline] RIP: 0010:step_into+0x1ba/0x790 fs/namei.c:1814 Code: 89 54 24 0c e8 f7 d8 ff ff 44 8b 54 24 0c 84 c0 0f 84 c2 01 00 00 48 8b 03 4c 89 64 24 20 45 89 e9 44 8b 43 38 48 89 44 24 18 <41> 8b 34 24 f7 c6 00 00 07 00 0f 85 aa 01 00 00 81 e6 00 00 70 00 RSP: 0018:ffffc900004a3c78 EFLAGS: 00010246 RAX: ffff8881085dada0 RBX: ffffc900004a3d70 RCX: 0000000000000000 RDX: 0000000000000007 RSI: 0000000000000001 RDI: ffffc900004a3d70 RBP: ffffc900004a3cd0 R08: 0000000000004000 R09: 00000000ffff8881 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000007 R13: 0000000000000001 R14: ffffffff813864c2 R15: ffff88810b5d09c0 FS: 00007fca781786c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000007 CR3: 0000000116b0e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_component+0x6b/0x1b0 fs/namei.c:1990 lookup_last fs/namei.c:2439 [inline] path_lookupat+0x69/0x1b0 fs/namei.c:2463 filename_lookup+0xc6/0x1d0 fs/namei.c:2492 user_path_at_empty+0x3a/0x60 fs/namei.c:2891 do_readlinkat+0x58/0x120 fs/stat.c:442 __do_sys_readlink fs/stat.c:475 [inline] __se_sys_readlink fs/stat.c:472 [inline] __x64_sys_readlink+0x1a/0x20 fs/stat.c:472 x64_sys_call+0x713/0x990 arch/x86/include/generated/asm/syscalls_64.h:90 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: 0033:0x7fca78315e59 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:00007fca78178028 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007fca7858efa0 RCX: 00007fca78315e59 RDX: 000000000000009f RSI: 00002000000023c0 RDI: 00002000000021c0 RBP: 00007fca783abe6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca7858f038 R14: 00007fca7858efa0 R15: 00007ffe6c7135a8 Modules linked in: CR2: 0000000000000007 ---[ end trace 58f15d3deb96cc1b ]--- RIP: 0010:traverse_mounts fs/namei.c:1386 [inline] RIP: 0010:handle_mounts fs/namei.c:1506 [inline] RIP: 0010:step_into+0x1ba/0x790 fs/namei.c:1814 Code: 89 54 24 0c e8 f7 d8 ff ff 44 8b 54 24 0c 84 c0 0f 84 c2 01 00 00 48 8b 03 4c 89 64 24 20 45 89 e9 44 8b 43 38 48 89 44 24 18 <41> 8b 34 24 f7 c6 00 00 07 00 0f 85 aa 01 00 00 81 e6 00 00 70 00 RSP: 0018:ffffc900004a3c78 EFLAGS: 00010246 RAX: ffff8881085dada0 RBX: ffffc900004a3d70 RCX: 0000000000000000 RDX: 0000000000000007 RSI: 0000000000000001 RDI: ffffc900004a3d70 RBP: ffffc900004a3cd0 R08: 0000000000004000 R09: 00000000ffff8881 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000007 R13: 0000000000000001 R14: ffffffff813864c2 R15: ffff88810b5d09c0 FS: 00007fca781786c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000007 CR3: 0000000116b0e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 54 24 0c mov %edx,0xc(%rsp) 4: e8 f7 d8 ff ff call 0xffffd900 9: 44 8b 54 24 0c mov 0xc(%rsp),%r10d e: 84 c0 test %al,%al 10: 0f 84 c2 01 00 00 je 0x1d8 16: 48 8b 03 mov (%rbx),%rax 19: 4c 89 64 24 20 mov %r12,0x20(%rsp) 1e: 45 89 e9 mov %r13d,%r9d 21: 44 8b 43 38 mov 0x38(%rbx),%r8d 25: 48 89 44 24 18 mov %rax,0x18(%rsp) * 2a: 41 8b 34 24 mov (%r12),%esi <-- trapping instruction 2e: f7 c6 00 00 07 00 test $0x70000,%esi 34: 0f 85 aa 01 00 00 jne 0x1e4 3a: 81 e6 00 00 70 00 and $0x700000,%esi