ci2 starts bisection 2025-04-30 22:27:25.193739097 +0000 UTC m=+6528.045937131 bisecting fixing commit since e2b9748880b939d8d99877b72cc4cc42951d49b6 building syzkaller on f3558dbf032eab2b77c1cb11b9ce2baffe7838d3 ensuring issue is reproducible on original commit e2b9748880b939d8d99877b72cc4cc42951d49b6 testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: bc4fb9b60b460863f15fbe2446b9e2409141b69416d9f6ede9cfa8d0bda3418c 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 777f64e5bd71d7a23292b95b35294ceae8e98718d9596c64183b7cee2dd4ccb6 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed kconfig minimization: base=5185 full=6548 leaves diff=266 split chunks (needed=false): <266> split chunk #0 of len 266 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 0d34bb910f8c4814c6dc1f1508e69f92abd9f050e9e85d3dee8beb05352f3f9f 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 62c953673dd1ce7c89ca5ae092691e765d631e06b6ed0a26e3a92d3dffa9d44b 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: ae1e17d38e5a3b33ebedb8cadce042ae84fabdeb65ef7595a43e1801098103a6 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 34b0c49036efc34326d7963fcc575ed5667a9d1ca5f7db5b53cfbdc775dc3eb9 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit e2b9748880b939d8d99877b72cc4cc42951d49b6 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 failed building e2b9748880b939d8d99877b72cc4cc42951d49b6: ld.lld: error: undefined symbol: wext_proc_init ld.lld: error: undefined symbol: wext_proc_exit ld.lld: error: undefined symbol: wext_handle_ioctl ld.lld: error: undefined symbol: compat_wext_handle_ioctl minimized to 50 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_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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing current HEAD 242f90b45e895bb0721721f486e2497054eeb0c1 testing commit 242f90b45e895bb0721721f486e2497054eeb0c1 gcc compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 kernel signature: 8aa0e02f2abc0b3d860bc11a36c92ac5af368b8ccda1ae56eb65c0ce23a62d22 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: 1h25m28.379079986s (build: 34m27.717882198s, test: 47m2.126046464s) crash still not fixed or there were kernel test errors commit msg: UPSTREAM: drm/msm: Rename drm_msm_gem_submit_reloc::or in C++ code crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat BUG: kernel NULL pointer dereference, address: 000000000000000a #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 11192d067 P4D 11192d067 PUD 111931067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 460 Comm: syz.2.16 Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline] RIP: 0010:do_unlinkat+0x168/0x2b0 fs/namei.c:4416 Code: 48 89 c3 48 3d 01 f0 ff ff 72 14 49 8b 7e 30 4c 01 ff e8 7b d6 db ff 41 89 dd e9 96 00 00 00 48 8b 45 b8 8b 4d b4 80 3c 08 00 <8b> 03 74 21 a9 00 00 70 00 74 4a 25 00 00 60 00 45 31 ed 3d 00 00 RSP: 0018:ffffc90000993e78 EFLAGS: 00010246 RAX: ffff888108afe028 RBX: 000000000000000a RCX: 0000000000000005 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff888108c18000 RBP: ffffc90000993ef0 R08: ffff88811065e400 R09: ffff888100041400 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000993ea0 R13: 0000000000000000 R14: ffff88810d3faea0 R15: 00000000000000a0 FS: 00007f8d1b1fb6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000a CR3: 000000011065b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4437 [inline] __se_sys_unlink fs/namei.c:4435 [inline] __x64_sys_unlink+0x1e/0x30 fs/namei.c:4435 x64_sys_call+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8d1a385d29 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:00007f8d1b1fb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f8d1a576080 RCX: 00007f8d1a385d29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f8d1a401b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8d1a576080 R15: 00007ffe8cefbd28 Modules linked in: CR2: 000000000000000a ---[ end trace 0000000000000000 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline] RIP: 0010:do_unlinkat+0x168/0x2b0 fs/namei.c:4416 Code: 48 89 c3 48 3d 01 f0 ff ff 72 14 49 8b 7e 30 4c 01 ff e8 7b d6 db ff 41 89 dd e9 96 00 00 00 48 8b 45 b8 8b 4d b4 80 3c 08 00 <8b> 03 74 21 a9 00 00 70 00 74 4a 25 00 00 60 00 45 31 ed 3d 00 00 RSP: 0018:ffffc90000993e78 EFLAGS: 00010246 RAX: ffff888108afe028 RBX: 000000000000000a RCX: 0000000000000005 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff888108c18000 RBP: ffffc90000993ef0 R08: ffff88811065e400 R09: ffff888100041400 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000993ea0 R13: 0000000000000000 R14: ffff88810d3faea0 R15: 00000000000000a0 FS: 00007f8d1b1fb6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000000a CR3: 000000011065b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 c3 mov %rax,%rbx 3: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 9: 72 14 jb 0x1f b: 49 8b 7e 30 mov 0x30(%r14),%rdi f: 4c 01 ff add %r15,%rdi 12: e8 7b d6 db ff call 0xffdbd692 17: 41 89 dd mov %ebx,%r13d 1a: e9 96 00 00 00 jmp 0xb5 1f: 48 8b 45 b8 mov -0x48(%rbp),%rax 23: 8b 4d b4 mov -0x4c(%rbp),%ecx 26: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) * 2a: 8b 03 mov (%rbx),%eax <-- trapping instruction 2c: 74 21 je 0x4f 2e: a9 00 00 70 00 test $0x700000,%eax 33: 74 4a je 0x7f 35: 25 00 00 60 00 and $0x600000,%eax 3a: 45 31 ed xor %r13d,%r13d 3d: 3d .byte 0x3d