ci2 starts bisection 2024-07-11 16:28:39.901218909 +0000 UTC m=+41366.531731351 bisecting fixing commit since 993bed180178156a70afdafe8aaf23a117107352 building syzkaller on 6baf506947ba27ed9ce775cf9351cb0886166083 ensuring issue is reproducible on original commit 993bed180178156a70afdafe8aaf23a117107352 testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0a2d2a6b57f21d13bf59a75d6da59029900faac59521ca3a1ca53ce3abcc4c06 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 496c11a47bc0886f1f42f7790b3ce60f002fa18de37b63f9feb63d716a8a2109 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=4920 full=6159 leaves diff=242 split chunks (needed=false): <242> split chunk #0 of len 242 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7220ed2b51e19c1bb623dfa4c5256dfbbca6be2161cb1f95c1e28403594d3961 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 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f0438f13a7d56099c8fb61a7e863052e826c83992f464f875a4b916f31b7aae 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ba048bec91aaf0bc61c7f579bb067930573958c8b547d21a891d5f83fce76b7d 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 85204d1a541c794efeea5fa470b6fe64dae66c09cf167577381690c86baf04f9 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 993bed180178156a70afdafe8aaf23a117107352: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3385: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343: undefined reference to `wext_proc_exit' net/core/net-procfs.c:327: undefined reference to `wext_proc_init' minimized to 46 configs; suspects: [HID_ZEROPLUS 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 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 X86_X32 ZEROPLUS_FF] disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD db06c48ab67eb5db1ac64a0210d77742e335537a testing commit db06c48ab67eb5db1ac64a0210d77742e335537a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1e927379709cdd5763e97b34aacef1eaeaad9de2dd912686b08520f12b92ac81 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: 1h26m6.13211813s (build: 1h3m12.110048597s, test: 21m8.085750966s) crash still not fixed or there were kernel test errors commit msg: Merge 5.15.151 into android13-5.15-lts crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat BUG: kernel NULL pointer dereference, address: 0000000000000019 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 114546067 P4D 114546067 PUD 114543067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 380 Comm: syz-executor.0 Not tainted 5.15.151-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:do_unlinkat+0x135/0x2a0 fs/namei.c:4341 Code: 48 81 c7 a0 00 00 00 e8 29 c0 a9 00 48 8b 75 b8 48 8d 7d c0 89 da e8 9a 8b ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 44 01 00 00 <8b> 00 8b 4d c4 48 8b 75 c8 89 c2 81 e2 00 00 70 00 80 3c 0e 00 0f RSP: 0018:ffffc900003b3eb0 EFLAGS: 00010203 RAX: 0000000000000019 RBX: 0000000000000000 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff888101bba500 RBP: ffffc900003b3f18 R08: 0000000000000004 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8881081d4000 R14: 0000000000000000 R15: 0000000000000019 FS: 00007ff59499e6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000019 CR3: 0000000114555000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4396 [inline] __se_sys_unlink fs/namei.c:4394 [inline] __x64_sys_unlink+0x3d/0x60 fs/namei.c:4394 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff594e3dda9 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:00007ff59499e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007ff594f6c050 RCX: 00007ff594e3dda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007ff594e8a47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ff594f6c050 R15: 00007ffdeac99658 Modules linked in: CR2: 0000000000000019 ---[ end trace aa96a2c562f58946 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:do_unlinkat+0x135/0x2a0 fs/namei.c:4341 Code: 48 81 c7 a0 00 00 00 e8 29 c0 a9 00 48 8b 75 b8 48 8d 7d c0 89 da e8 9a 8b ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 44 01 00 00 <8b> 00 8b 4d c4 48 8b 75 c8 89 c2 81 e2 00 00 70 00 80 3c 0e 00 0f RSP: 0018:ffffc900003b3eb0 EFLAGS: 00010203 RAX: 0000000000000019 RBX: 0000000000000000 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff888101bba500 RBP: ffffc900003b3f18 R08: 0000000000000004 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8881081d4000 R14: 0000000000000000 R15: 0000000000000019 FS: 00007ff59499e6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000019 CR3: 0000000114555000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 81 c7 a0 00 00 00 add $0xa0,%rdi 7: e8 29 c0 a9 00 call 0xa9c035 c: 48 8b 75 b8 mov -0x48(%rbp),%rsi 10: 48 8d 7d c0 lea -0x40(%rbp),%rdi 14: 89 da mov %ebx,%edx 16: e8 9a 8b ff ff call 0xffff8bb5 1b: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 21: 49 89 c7 mov %rax,%r15 24: 0f 87 44 01 00 00 ja 0x16e * 2a: 8b 00 mov (%rax),%eax <-- trapping instruction 2c: 8b 4d c4 mov -0x3c(%rbp),%ecx 2f: 48 8b 75 c8 mov -0x38(%rbp),%rsi 33: 89 c2 mov %eax,%edx 35: 81 e2 00 00 70 00 and $0x700000,%edx 3b: 80 3c 0e 00 cmpb $0x0,(%rsi,%rcx,1) 3f: 0f .byte 0xf