ci2 starts bisection 2024-08-15 21:45:50.14406125 +0000 UTC m=+67223.017661993 bisecting fixing commit since 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf building syzkaller on 8d446f1521b580230a60c9ae228bf0c26312c80b ensuring issue is reproducible on original commit 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf testing commit 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fdaeb70eb96a90d640cd6d8235ba27427221a8c4f4a282b7dc5da95af70935c0 all runs: crashed: general protection fault in vfs_link representative crash: general protection fault in vfs_link, 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 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cc332be6aa240b1fbbc64042460daf11b5695a41b96f8d84adb1fa2c62ab7227 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=5179 full=6492 leaves diff=255 split chunks (needed=false): <255> split chunk #0 of len 255 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3b50de2f5ba0099d073ddf3a8f9c8e3a5945cf96cbfd4b586edf223227bfeb88 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, 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 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dcffd535439829fbb74de2b45c2390b352de64024f37a43a8ab7c5ef31ed0bab all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a7ba23da3fe698ee7d1ddc260145cc35964045804ad9121a559d77844aa18e14 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8836018564f763d80c3a4493de7119b0b361b4d0b6b7e58c74d7929990cccffc all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, 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 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 8c0f9174731da74dc3dbcf5bb7e3b048183a0ecf: net/socket.c:1242: undefined reference to `wext_handle_ioctl' net/socket.c:3437: 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 51 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 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing current HEAD d6a513a78492b09fbe41a9922948a7371c821c5b testing commit d6a513a78492b09fbe41a9922948a7371c821c5b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c57f5d7b1da6c65af6db37354e09b87386209389b047edf1dc2d14eadc952a15 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vfs_link representative crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link, types: [UNKNOWN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h52m42.023426024s (build: 1h8m26.154188811s, test: 36m3.219949913s) crash still not fixed or there were kernel test errors commit msg: UPSTREAM: scsi: ufs: core: Perform read back after writing UTP_TASK_REQ_LIST_BASE_H crash: BUG: unable to handle kernel NULL pointer dereference in vfs_link BUG: kernel NULL pointer dereference, address: 0000000000000030 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 111c78067 P4D 111c78067 PUD 111c69067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 352 Comm: syz-executor.0 Not tainted 6.1.90-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:vfs_link+0x11/0x2b0 fs/namei.c:4556 Code: ff ff 48 89 df be 9c ff ff ff 48 89 c2 e8 27 fd ff ff 48 98 5b 41 5e 5d c3 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 <4c> 8b 7f 30 41 bd fe ff ff ff 4d 85 ff 0f 84 a9 00 00 00 49 89 d4 RSP: 0018:ffffc9000074bd40 EFLAGS: 00010282 RAX: 000000000c35b601 RBX: ffff88810c35b5e8 RCX: ffff888109d2a680 RDX: ffff88810c35b5e8 RSI: ffffffff8304fd38 RDI: 0000000000000000 RBP: ffffc9000074bd80 R08: 0000000000000000 R09: ffffffff812626c9 R10: ffff888108aca300 R11: ffff888108d212b8 R12: ffff888115123c18 R13: ffff888109d2a680 R14: ffff88810c35b688 R15: ffff888109d3b000 FS: 00007fd2350a26c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 0000000111c6c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:648 [inline] dir_link+0x14b/0x1e0 fs/incfs/vfs.c:1321 vfs_link+0x21c/0x2b0 fs/namei.c:4600 do_linkat+0x132/0x340 fs/namei.c:4671 __do_sys_linkat fs/namei.c:4699 [inline] __se_sys_linkat fs/namei.c:4696 [inline] __x64_sys_linkat+0x5a/0x70 fs/namei.c:4696 x64_sys_call+0x6f7/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:266 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd23427dda9 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:00007fd2350a20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007fd2343abf80 RCX: 00007fd23427dda9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007fd2342ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd2343abf80 R15: 00007ffd88282718 Modules linked in: CR2: 0000000000000030 ---[ end trace 0000000000000000 ]--- RIP: 0010:vfs_link+0x11/0x2b0 fs/namei.c:4556 Code: ff ff 48 89 df be 9c ff ff ff 48 89 c2 e8 27 fd ff ff 48 98 5b 41 5e 5d c3 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 <4c> 8b 7f 30 41 bd fe ff ff ff 4d 85 ff 0f 84 a9 00 00 00 49 89 d4 RSP: 0018:ffffc9000074bd40 EFLAGS: 00010282 RAX: 000000000c35b601 RBX: ffff88810c35b5e8 RCX: ffff888109d2a680 RDX: ffff88810c35b5e8 RSI: ffffffff8304fd38 RDI: 0000000000000000 RBP: ffffc9000074bd80 R08: 0000000000000000 R09: ffffffff812626c9 R10: ffff888108aca300 R11: ffff888108d212b8 R12: ffff888115123c18 R13: ffff888109d2a680 R14: ffff88810c35b688 R15: ffff888109d3b000 FS: 00007fd2350a26c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 0000000111c6c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff 48 89 decl -0x77(%rax) 3: df be 9c ff ff ff fistpll -0x64(%rsi) 9: 48 89 c2 mov %rax,%rdx c: e8 27 fd ff ff call 0xfffffd38 11: 48 98 cltq 13: 5b pop %rbx 14: 41 5e pop %r14 16: 5d pop %rbp 17: c3 ret 18: 55 push %rbp 19: 48 89 e5 mov %rsp,%rbp 1c: 41 57 push %r15 1e: 41 56 push %r14 20: 41 55 push %r13 22: 41 54 push %r12 24: 53 push %rbx 25: 48 83 ec 18 sub $0x18,%rsp * 29: 4c 8b 7f 30 mov 0x30(%rdi),%r15 <-- trapping instruction 2d: 41 bd fe ff ff ff mov $0xfffffffe,%r13d 33: 4d 85 ff test %r15,%r15 36: 0f 84 a9 00 00 00 je 0xe5 3c: 49 89 d4 mov %rdx,%r12