ci2 starts bisection 2024-05-25 10:12:09.486352837 +0000 UTC m=+59738.347320762 bisecting fixing commit since 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 building syzkaller on 6baf506947ba27ed9ce775cf9351cb0886166083 ensuring issue is reproducible on original commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e3cde3ef74d30f36f08cf217ecce9d6661163ae38e48043196668278ce51bd20 all runs: crashed: general protection fault in do_unlinkat representative crash: general protection fault in do_unlinkat, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 671cd6005eb3263cece8d1c14322a426aa9f66663dcaf52c8d425e4f99552af5 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=5179 full=6492 leaves diff=255 split chunks (needed=false): <255> split chunk #0 of len 255 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a92d338e022fbc3c6436594f36ae1a216506a0c38a0ec04549396ca9a91b7998 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d6e3fe51570ef103da672a523e6702b33d53d920fd9b6c34ea1700e5df0c90ae all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 35cda6b4cf9d07a3fbe0e62164becf34dd1c3ff866eca4ee055d28c451d93ad3 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 73d2278260837c881bbe20ac11f552044d476a61c964934dff2a1479425105e3 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 5b8114ec3c9234ea3c54ac6f60fb77904b713dc3: net/socket.c:1242: undefined reference to `wext_handle_ioctl' net/socket.c:3437: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:329: undefined reference to `wext_proc_init' net/core/net-procfs.c:345: undefined reference to `wext_proc_exit' minimized to 51 configs; suspects: [HID_ZEROPLUS 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_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 V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF] disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing current HEAD 68c821783c7688df37f4ac7bb39f3fb606b827c0 testing commit 68c821783c7688df37f4ac7bb39f3fb606b827c0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bcee451500e87fd108d30fddc4d4bdd91db6bfb96fac48da698cf3071119fb5a all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat representative crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat, types: [UNKNOWN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 44m52.289773593s (build: 17m0.363184755s, test: 25m30.428958285s) crash still not fixed or there were kernel test errors commit msg: UPSTREAM: epoll: be better about file lifetimes crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat BUG: kernel NULL pointer dereference, address: 0000000000000049 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 112230067 P4D 112230067 PUD 11220f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 357 Comm: syz-executor.0 Not tainted 6.1.75-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:do_unlinkat+0x1a1/0x2d0 fs/namei.c:4389 Code: a9 00 00 70 00 74 53 25 00 00 60 00 31 c9 3d 00 00 20 00 0f 94 c1 41 be ec ff ff ff 41 29 ce 45 31 ed eb 47 41 bf a0 00 00 00 <4c> 8b 6b 30 f6 43 02 70 4c 8b 75 90 74 2d 4c 89 ef e8 a9 f7 00 00 RSP: 0018:ffffc900007d7e90 EFLAGS: 00010246 RAX: ffff8881009cc028 RBX: 0000000000000019 RCX: 0000000000000005 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff888108a53900 RBP: ffffc900007d7f10 R08: ffff888112378480 R09: ffffffff8154613c R10: ffff888112378480 R11: ffff888100041400 R12: ffff88810b597b60 R13: ffffc900007d7ec0 R14: 00000000000000a0 R15: 00000000000000a0 FS: 00007f13115cf6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000049 CR3: 000000011223f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4445 [inline] __se_sys_unlink fs/namei.c:4443 [inline] __x64_sys_unlink+0x1e/0x30 fs/namei.c:4443 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f131087dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f13115cf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f13109ac050 RCX: 00007f131087dda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f13108ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f13109ac050 R15: 00007fffcda7e208 Modules linked in: CR2: 0000000000000049 ---[ end trace 0000000000000000 ]--- RIP: 0010:do_unlinkat+0x1a1/0x2d0 fs/namei.c:4389 Code: a9 00 00 70 00 74 53 25 00 00 60 00 31 c9 3d 00 00 20 00 0f 94 c1 41 be ec ff ff ff 41 29 ce 45 31 ed eb 47 41 bf a0 00 00 00 <4c> 8b 6b 30 f6 43 02 70 4c 8b 75 90 74 2d 4c 89 ef e8 a9 f7 00 00 RSP: 0018:ffffc900007d7e90 EFLAGS: 00010246 RAX: ffff8881009cc028 RBX: 0000000000000019 RCX: 0000000000000005 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff888108a53900 RBP: ffffc900007d7f10 R08: ffff888112378480 R09: ffffffff8154613c R10: ffff888112378480 R11: ffff888100041400 R12: ffff88810b597b60 R13: ffffc900007d7ec0 R14: 00000000000000a0 R15: 00000000000000a0 FS: 00007f13115cf6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000049 CR3: 000000011223f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: a9 00 00 70 00 test $0x700000,%eax 5: 74 53 je 0x5a 7: 25 00 00 60 00 and $0x600000,%eax c: 31 c9 xor %ecx,%ecx e: 3d 00 00 20 00 cmp $0x200000,%eax 13: 0f 94 c1 sete %cl 16: 41 be ec ff ff ff mov $0xffffffec,%r14d 1c: 41 29 ce sub %ecx,%r14d 1f: 45 31 ed xor %r13d,%r13d 22: eb 47 jmp 0x6b 24: 41 bf a0 00 00 00 mov $0xa0,%r15d * 2a: 4c 8b 6b 30 mov 0x30(%rbx),%r13 <-- trapping instruction 2e: f6 43 02 70 testb $0x70,0x2(%rbx) 32: 4c 8b 75 90 mov -0x70(%rbp),%r14 36: 74 2d je 0x65 38: 4c 89 ef mov %r13,%rdi 3b: e8 a9 f7 00 00 call 0xf7e9