ci2 starts bisection 2024-03-21 00:11:59.80415864 +0000 UTC m=+33692.067884310 bisecting fixing commit since ed2a228522b98300ecccd958506a9a2833eca780 building syzkaller on bfc478367b83b3fda580f54964aa9f3651beeb3d ensuring issue is reproducible on original commit ed2a228522b98300ecccd958506a9a2833eca780 testing commit ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1ee56f98cbe78abfc8e5fda5191a7fa563602043919b42569d8ea802609349a run #0: failed: failed to run command in VM: broken console: Permission denied (publickey) run #1: crashed: general protection fault in do_unlinkat run #2: crashed: general protection fault in do_unlinkat run #3: crashed: general protection fault in do_unlinkat run #4: crashed: general protection fault in do_unlinkat run #5: crashed: general protection fault in do_unlinkat run #6: crashed: general protection fault in do_unlinkat run #7: crashed: general protection fault in do_unlinkat run #8: crashed: general protection fault in do_unlinkat run #9: crashed: general protection fault in do_unlinkat run #10: crashed: general protection fault in do_unlinkat run #11: crashed: general protection fault in do_unlinkat run #12: crashed: general protection fault in do_unlinkat run #13: crashed: general protection fault in do_unlinkat run #14: crashed: general protection fault in do_unlinkat run #15: crashed: general protection fault in do_unlinkat run #16: crashed: general protection fault in do_unlinkat run #17: crashed: general protection fault in do_unlinkat run #18: crashed: general protection fault in do_unlinkat run #19: 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 ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f069fb4fa9d4a12c9a5e07a5445416f3abde625e8197f6b1a5de1056368a555 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=5179 full=6486 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3fe4971b44ce12d9b918ce19aee94dd6f7f7da49b0ec01131cae3afbc237e095 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 ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 038ba7d569ffaba10adeff5a6d66940d5c3625f8ed48139c5d06ccc3492c036e 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 ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 19420a51694a77e68cba5ac53e7b41d3f9e7b518110d1b6a03fb3a37ce7bc496 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 ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e4f58ad2a9484f5e7d8e3e389aa1306c2c0b70ee6204c4033716a810062b57ce 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 ed2a228522b98300ecccd958506a9a2833eca780 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building ed2a228522b98300ecccd958506a9a2833eca780: net/socket.c:1225: undefined reference to `wext_handle_ioctl' net/socket.c:3420: 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 48 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 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing current HEAD 75266774b9c4f2ee0160c11fa6f1bc8e4dbe8083 testing commit 75266774b9c4f2ee0160c11fa6f1bc8e4dbe8083 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4893ee8a9cd212c1d0e8257f7bedcca9dfaf133bb936cc71e3eb94f669cacb5c 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: 1h0m40.530145767s (build: 17m44.000672996s, test: 22m12.431858421s) crash still not fixed or there were kernel test errors commit msg: ANDROID: null_blk: Support configuring the maximum segment size crash: BUG: unable to handle kernel NULL pointer dereference in do_unlinkat BUG: kernel NULL pointer dereference, address: 0000000000000032 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 111cc1067 P4D 111cc1067 PUD 111ca4067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 356 Comm: syz-executor.0 Not tainted 6.1.68-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:do_unlinkat+0x19b/0x2c0 fs/namei.c:4312 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 5f f7 00 00 RSP: 0018:ffffc90000787e90 EFLAGS: 00010246 RAX: ffff888108b0e028 RBX: 0000000000000002 RCX: 0000000000000005 RDX: 0000000300000000 RSI: 0000000000000000 RDI: ffff888100292600 RBP: ffffc90000787f10 R08: 00000000ffffff9c R09: ffffffff8154357c R10: ffff888110397ae0 R11: ffff888100041400 R12: ffff88810ed2b8f0 R13: ffffc90000787ec0 R14: 00000000000000a0 R15: 00000000000000a0 FS: 00007f4a9aa2d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000032 CR3: 0000000111cd5000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0x1e/0x30 fs/namei.c:4366 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: 0033:0x7f4a99c7cb29 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:00007f4a9aa2d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f4a99d9bf80 RCX: 00007f4a99c7cb29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f4a99cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4a99d9bf80 R15: 00007ffd92d4f468 Modules linked in: CR2: 0000000000000032 ---[ end trace 0000000000000000 ]--- RIP: 0010:do_unlinkat+0x19b/0x2c0 fs/namei.c:4312 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 5f f7 00 00 RSP: 0018:ffffc90000787e90 EFLAGS: 00010246 RAX: ffff888108b0e028 RBX: 0000000000000002 RCX: 0000000000000005 RDX: 0000000300000000 RSI: 0000000000000000 RDI: ffff888100292600 RBP: ffffc90000787f10 R08: 00000000ffffff9c R09: ffffffff8154357c R10: ffff888110397ae0 R11: ffff888100041400 R12: ffff88810ed2b8f0 R13: ffffc90000787ec0 R14: 00000000000000a0 R15: 00000000000000a0 FS: 00007f4a9aa2d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000032 CR3: 0000000111cd5000 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 5f f7 00 00 call 0xf79f