ci2 starts bisection 2025-05-15 12:53:03.822200817 +0000 UTC m=+43516.258955293 bisecting fixing commit since fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df building syzkaller on e28266709dd2a1d1452d4a5bbf271700e10335c6 ensuring issue is reproducible on original commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4a2a31b8225f6999b687184577463153956e034b8f9cf51ee9860934c3507957 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 17cd0a4f4920e1f26e81c1b2ef3e58589e807eef17d1b5d2380ac4c060bfb13d 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4788 full=6023 leaves diff=246 split chunks (needed=false): <246> split chunk #0 of len 246 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 01bf1bffb7bae862bfadf7dafe06b0e74064a1efebefd9a9adca93aa6252cc72 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3a998b0ec3962da3c0fd0049978d354ee2a4ac6f238d4114986a3f3a4d6d0f60 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 fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e614ee703447cd0a60c72f7535cf5f70b5f1d195c0bd1bc7348afa5311c9fccd 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 46bc439191c8b98fed50bce98889189b6e80590597c78f624ae10d8fd31585e3 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building fc9aa81462ee32fea3dd6d7c6d8d7dcdb69637df: net/socket.c:1128: undefined reference to `wext_handle_ioctl' net/socket.c:3397: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:346: undefined reference to `wext_proc_exit' net/core/net-procfs.c:330: undefined reference to `wext_proc_init' minimized to 46 configs; suspects: [HID_ZEROPLUS 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 X86_X32 ZEROPLUS_FF] disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing current HEAD 7e2543346ff7ecc2e4fff0c95767c72c5ac165c6 testing commit 7e2543346ff7ecc2e4fff0c95767c72c5ac165c6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d88932650356bd8edb4ecafa9cca9b00993374eb77ab4312fb7d5f1ad9b4f63f 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: 2h31m22.498240504s (build: 2h4m2.576696758s, test: 25m22.205323163s) crash still not fixed or there were kernel test errors commit msg: ANDROID: GKI: Add bpf_redirect_info to virtual_device symbol list. crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 111f84067 P4D 111f84067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 500 Comm: syz.2.16 Not tainted 5.10.237-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline] RIP: 0010:do_unlinkat+0x13f/0x2b0 fs/namei.c:4030 Code: 81 c7 a0 00 00 00 e8 d0 66 a2 00 48 8b 75 b8 48 8d 7d c0 44 89 ea e8 60 90 ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 34 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:ffffc9000068feb0 EFLAGS: 00010203 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff88810e7e8000 RBP: ffffc9000068ff18 R08: 0000000000000004 R09: 0000000000000064 R10: ffff88810a3b4440 R11: 0000000000000000 R12: ffff888107f9e000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 FS: 00007f834fa7b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000111f75000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4082 [inline] __se_sys_unlink fs/namei.c:4080 [inline] __x64_sys_unlink+0x3d/0x60 fs/namei.c:4080 do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f835002a169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f834fa7b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f8350243080 RCX: 00007f835002a169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000000100 RBP: 00007f83500ab2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8350243080 R15: 00007ffe00c12588 Modules linked in: CR2: 0000000000000008 ---[ end trace 6b17fa9b1f722520 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline] RIP: 0010:do_unlinkat+0x13f/0x2b0 fs/namei.c:4030 Code: 81 c7 a0 00 00 00 e8 d0 66 a2 00 48 8b 75 b8 48 8d 7d c0 44 89 ea e8 60 90 ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 34 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:ffffc9000068feb0 EFLAGS: 00010203 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff88810e7e8000 RBP: ffffc9000068ff18 R08: 0000000000000004 R09: 0000000000000064 R10: ffff88810a3b4440 R11: 0000000000000000 R12: ffff888107f9e000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 FS: 00007f834fa7b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000111f75000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 81 c7 a0 00 00 00 add $0xa0,%edi 6: e8 d0 66 a2 00 call 0xa266db b: 48 8b 75 b8 mov -0x48(%rbp),%rsi f: 48 8d 7d c0 lea -0x40(%rbp),%rdi 13: 44 89 ea mov %r13d,%edx 16: e8 60 90 ff ff call 0xffff907b 1b: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 21: 49 89 c7 mov %rax,%r15 24: 0f 87 34 01 00 00 ja 0x15e * 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