ci starts bisection 2024-01-03 10:15:07.832636558 +0000 UTC m=+1006935.429401765 bisecting fixing commit since 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb building syzkaller on 09ffe269727719aad37ea8145eb57fefb0097165 ensuring issue is reproducible on original commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a6a9f83781ef4a0ea2eb12109efe1413befc75e5938e06d937144fc6a47759c4 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5da52eef1c6eed33887d3117a521400a98eb710f6d3b92048056debdb2f56067 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=3923 full=7594 leaves diff=2004 split chunks (needed=false): <2004> split chunk #0 of len 2004 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4110034edc7fc762cc509e2a07701b40c1e26549a94a0bcd48c4292737802098 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b2e35ecfaa49b24c858119310045a9d4f65720ed6bb0d7560f7fce78b9cf14ce all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ffaf0542c5fe197f1dc24e8b2ee177d513d4464ee9515a693ea66a6d59afc353 all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 35b73e6c6c16ca69c3b5ab2c6988f4ea436a2d50b3a5839e7c06c5587a296d2f all runs: crashed: kernel BUG in __page_table_check_zero representative crash: kernel BUG in __page_table_check_zero, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8a28a0b6f1a1dcbf5a834600a9acfbe2ba51e5eb gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f8d09ba674920d86a70041417f3b06dd7ee30f845cfbfa66dff3dcdda24f9af5 all runs: OK false negative chance: 0.000 minimized to 400 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK 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VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_NOMODESET VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_FEATURE_NAMES X86_SGX X86_SGX_KVM X86_X2APIC X86_X32_ABI XARRAY_MULTI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XFS_SUPPORT_V4 XOR_BLOCKS XZ_DEC_IA64 YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing current HEAD 610a9b8f49fbcf1100716370d3b5f6f884a2835a testing commit 610a9b8f49fbcf1100716370d3b5f6f884a2835a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 25c9da95071374be376a6808554639d8701da27ed499c582f6c7531a3723febe run #0: crashed: kernel BUG in __page_table_check_zero run #1: crashed: kernel BUG in __page_table_check_zero run #2: crashed: kernel BUG in __page_table_check_zero run #3: crashed: kernel BUG in __page_table_check_zero run #4: crashed: kernel BUG in __page_table_check_zero run #5: crashed: kernel BUG in __page_table_check_zero run #6: crashed: kernel BUG in __page_table_check_zero run #7: crashed: kernel BUG in __page_table_check_zero run #8: crashed: kernel panic: Fatal exception run #9: basic kernel testing failed: failed to copy binary to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3467340472" "root@10.128.0.201:./syz-executor3467340472"] Executing: program /usr/bin/ssh host 10.128.0.201, user root, command sftp OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023 debug1: Reading configuration data /dev/null debug1: Connecting to 10.128.0.201 [10.128.0.201] port 22. debug1: fd 3 clearing O_NONBLOCK debug1: Connection established. debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa_sk type -1 debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1 debug1: identity file /root/.ssh/id_ed25519 type -1 debug1: identity file /root/.ssh/id_ed25519-cert type -1 debug1: identity file /root/.ssh/id_ed25519_sk type -1 debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1 debug1: identity file /root/.ssh/id_xmss type -1 debug1: identity file /root/.ssh/id_xmss-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u1 debug1: Remote protocol version 2.0, remote software version OpenSSH_9.1 debug1: compat_banner: match: OpenSSH_9.1 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 10.128.0.201:22 as 'root' debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: sntrup761x25519-sha512@openssh.com debug1: kex: host key algorithm: ssh-ed25519 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: SSH2_MSG_KEX_ECDH_REPLY received debug1: Server host key: ssh-ed25519 SHA256:88IuL3orPAmVsyjIy2DvkKzVRHqGoDXxazNYOfOHasg debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory Warning: Permanently added '10.128.0.201' (ED25519) to the list of known hosts. debug1: rekey out after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: rekey in after 134217728 blocks debug1: Will attempt key: /root/.ssh/id_rsa debug1: Will attempt key: /root/.ssh/id_ecdsa debug1: Will attempt key: /root/.ssh/id_ecdsa_sk debug1: Will attempt key: /root/.ssh/id_ed25519 debug1: Will attempt key: /root/.ssh/id_ed25519_sk debug1: Will attempt key: /root/.ssh/id_xmss debug1: Will attempt key: /root/.ssh/id_dsa debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs= debug1: kex_input_ext_info: publickey-hostbound@openssh.com=<0> debug1: SSH2_MSG_SERVICE_ACCEPT received Authenticated to 10.128.0.201 ([10.128.0.201]:22) using "none". debug1: channel 0: new session [client-session] (inactive timeout: 0) debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug1: Sending subsystem: sftp debug1: pledge: fork scp: debug1: stat remote: No such file or directory representative crash: kernel BUG in __page_table_check_zero, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h52m12.000450672s (build: 1h0m26.824952153s, test: 45m56.848438523s) crash still not fixed or there were kernel test errors commit msg: Linux 6.7-rc8 crash: kernel BUG in __page_table_check_zero 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:00007ffba4cf00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007ffba528cf80 RCX: 00007ffba516db29 RDX: 0000000001000002 RSI: 0000000000400000 RDI: 0000000020000000 RBP: 00007ffba4cf0120 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000011012 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007ffba528cf80 R15: 00007ffcd5421e88 ------------[ cut here ]------------ kernel BUG at mm/page_table_check.c:146! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 2829 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:__page_table_check_zero+0xfe/0x160 mm/page_table_check.c:146 Code: 0f 85 63 ff ff ff 48 8b 17 83 e2 40 0f 84 57 ff ff ff 48 8b 57 48 48 8d 42 ff 83 e2 01 48 0f 44 c7 e9 43 ff ff ff 90 0f 0b 90 <0f> 0b a8 01 75 52 66 90 48 c7 c6 c0 65 bb 82 e8 ae 30 f7 ff 90 0f RSP: 0018:ffffc90001367c88 EFLAGS: 00010202 RAX: ffff888107168000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000040 RBP: 000000000000000a R08: 0000000000000048 R09: ffff88810a312550 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea0004740000 R15: 0200000000000000 FS: 00007ffba4cf06c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffba52890c0 CR3: 000000011af8f000 CR4: 0000000000350ef0 Call Trace: page_table_check_free include/linux/page_table_check.h:41 [inline] free_pages_prepare mm/page_alloc.c:1138 [inline] __free_pages_ok+0x311/0x4b0 mm/page_alloc.c:1267 dec_usb_memory_use_count+0x86/0xf0 drivers/usb/core/devio.c:198 usbdev_mmap+0x233/0x2d0 drivers/usb/core/devio.c:285 call_mmap include/linux/fs.h:2025 [inline] mmap_region+0x298/0xa90 mm/mmap.c:2851 do_mmap+0x355/0x510 mm/mmap.c:1379 vm_mmap_pgoff+0xe3/0x200 mm/util.c:556 ksys_mmap_pgoff+0x193/0x200 mm/mmap.c:1425 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7ffba516db29 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:00007ffba4cf00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007ffba528cf80 RCX: 00007ffba516db29 RDX: 0000000001000002 RSI: 0000000000400000 RDI: 0000000020000000 RBP: 00007ffba4cf0120 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000011012 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007ffba528cf80 R15: 00007ffcd5421e88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__page_table_check_zero+0xfe/0x160 mm/page_table_check.c:146 Code: 0f 85 63 ff ff ff 48 8b 17 83 e2 40 0f 84 57 ff ff ff 48 8b 57 48 48 8d 42 ff 83 e2 01 48 0f 44 c7 e9 43 ff ff ff 90 0f 0b 90 <0f> 0b a8 01 75 52 66 90 48 c7 c6 c0 65 bb 82 e8 ae 30 f7 ff 90 0f RSP: 0018:ffffc90001367c88 EFLAGS: 00010202 RAX: ffff888107168000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000040 RBP: 000000000000000a R08: 0000000000000048 R09: ffff88810a312550 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea0004740000 R15: 0200000000000000 FS: 00007ffba4cf06c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffba52890c0 CR3: 000000011af8f000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 75 05 jne 0xb 6: 48 83 c4 28 add $0x28,%rsp a: c3 ret b: e8 e1 20 00 00 call 0x20f1 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 c7 c1 b0 ff ff ff mov $0xffffffffffffffb0,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W