ci2 starts bisection 2026-08-03 19:55:57.289361012 +0000 UTC m=+34400.078003457 bisecting fixing commit since e8b14e1cefe8a3049a46a48685bf937ca244949d building syzkaller on 5d52cba5d9a409e44dfb6a2603f871fc7631cb2c ensuring issue is reproducible on original commit e8b14e1cefe8a3049a46a48685bf937ca244949d testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 61a73e81f4b2e3c0d3e090f3645761a4ca906ff1d1045ad0fe6a2d13de461512 all runs: crashed: general protection fault in path_openat representative crash: general protection fault in path_openat, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 6c9ca71c65025bd615fceddcf29126eb4deec079a4ed1664ff7fe902157690f8 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=4788 full=6025 leaves diff=248 split chunks (needed=false): <248> split chunk #0 of len 248 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2e97a407b3e29ffb16d9af8031468235513b5a238c2d3eca46251785628b760a all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: dd6250cd37dfc72b00c6241b3c450fd52f0ba0a7005314d718cbdf9cfd039ce4 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 395a766699cf750b749adf249a230d729ac96cb9f377e0dcbf9a5cc8d57366e8 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, 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 e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: e799bdcc80399134f8d54146e062923690182d5733ecffa11eba5e2f5a3b70ca all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit e8b14e1cefe8a3049a46a48685bf937ca244949d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building e8b14e1cefe8a3049a46a48685bf937ca244949d: net/socket.c:1128:(.text+0x817): undefined reference to `wext_handle_ioctl' net/socket.c:3397:(.text+0xa08): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:346:(.text+0x109): undefined reference to `wext_proc_exit' net/core/net-procfs.c:330:(.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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing current HEAD 0f73d4924a745338c12b47512b95c879c89e5119 testing commit 0f73d4924a745338c12b47512b95c879c89e5119 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d06a3713fde2a0cc2524ed029691cc6956d424c7f57b69bfe655524ad42c7b48 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in path_openat representative crash: BUG: unable to handle kernel NULL pointer dereference in path_openat, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 2h5m34.452893879s (build: 35m48.637640299s, test: 1h8m6.859784273s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.10 into android13-5.10-lts crash: BUG: unable to handle kernel NULL pointer dereference in path_openat BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 1194fd067 P4D 1194fd067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 486 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:atomic_open fs/namei.c:3138 [inline] RIP: 0010:lookup_open fs/namei.c:3227 [inline] RIP: 0010:open_last_lookups fs/namei.c:3325 [inline] RIP: 0010:path_openat+0xc7b/0x10d0 fs/namei.c:3514 Code: 48 85 d2 74 25 4c 89 f7 44 89 8d 78 ff ff ff 88 45 80 e8 18 be 00 00 48 8b 45 98 44 8b 8d 78 ff ff ff 4c 8b 70 18 0f b6 45 80 <41> f7 06 00 00 70 00 0f 84 22 01 00 00 49 83 fe fe 0f 94 c2 21 d0 RSP: 0018:ffffc90000807cd0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810e1f6340 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff8881191bdc80 RBP: ffffc90000807d70 R08: 0000000000000004 R09: 0000000000000000 R10: ffff8881178d55c0 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90000807d80 R14: 0000000000000008 R15: ffffc90000807ebc FS: 00007faae73cc6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 00000001194e7000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x9d/0x140 fs/namei.c:3544 do_sys_openat2+0x9c/0x210 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_openat fs/open.c:1251 [inline] __se_sys_openat fs/open.c:1246 [inline] __x64_sys_openat+0x51/0x90 fs/open.c:1246 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7faae7568f79 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:00007faae73cc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007faae77e2fa0 RCX: 00007faae7568f79 RDX: 0000000000040000 RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007faae75ff7e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faae77e3038 R14: 00007faae77e2fa0 R15: 00007ffc85d65298 Modules linked in: CR2: 0000000000000008 ---[ end trace 08d110e23a465498 ]--- RIP: 0010:atomic_open fs/namei.c:3138 [inline] RIP: 0010:lookup_open fs/namei.c:3227 [inline] RIP: 0010:open_last_lookups fs/namei.c:3325 [inline] RIP: 0010:path_openat+0xc7b/0x10d0 fs/namei.c:3514 Code: 48 85 d2 74 25 4c 89 f7 44 89 8d 78 ff ff ff 88 45 80 e8 18 be 00 00 48 8b 45 98 44 8b 8d 78 ff ff ff 4c 8b 70 18 0f b6 45 80 <41> f7 06 00 00 70 00 0f 84 22 01 00 00 49 83 fe fe 0f 94 c2 21 d0 RSP: 0018:ffffc90000807cd0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810e1f6340 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff8881191bdc80 RBP: ffffc90000807d70 R08: 0000000000000004 R09: 0000000000000000 R10: ffff8881178d55c0 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90000807d80 R14: 0000000000000008 R15: ffffc90000807ebc FS: 00007faae73cc6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 00000001194e7000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 85 d2 test %rdx,%rdx 3: 74 25 je 0x2a 5: 4c 89 f7 mov %r14,%rdi 8: 44 89 8d 78 ff ff ff mov %r9d,-0x88(%rbp) f: 88 45 80 mov %al,-0x80(%rbp) 12: e8 18 be 00 00 call 0xbe2f 17: 48 8b 45 98 mov -0x68(%rbp),%rax 1b: 44 8b 8d 78 ff ff ff mov -0x88(%rbp),%r9d 22: 4c 8b 70 18 mov 0x18(%rax),%r14 26: 0f b6 45 80 movzbl -0x80(%rbp),%eax * 2a: 41 f7 06 00 00 70 00 testl $0x700000,(%r14) <-- trapping instruction 31: 0f 84 22 01 00 00 je 0x159 37: 49 83 fe fe cmp $0xfffffffffffffffe,%r14 3b: 0f 94 c2 sete %dl 3e: 21 d0 and %edx,%eax