ci2 starts bisection 2024-10-21 12:02:30.20521743 +0000 UTC m=+100.537061849 bisecting fixing commit since 993bed180178156a70afdafe8aaf23a117107352 building syzkaller on 8d446f1521b580230a60c9ae228bf0c26312c80b ensuring issue is reproducible on original commit 993bed180178156a70afdafe8aaf23a117107352 testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9dafd5ee76b69383ca33e73f8f2f036f5fb9e32e525870a1a3aa9807af6b283d 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9a4c1c54b0fef6f558b9b53f6e4902d763579609edb95792f4b7c0589b4348c1 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=4920 full=6159 leaves diff=242 split chunks (needed=false): <242> split chunk #0 of len 242 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5dd9e1171a8f58b2040bb4c65bc746c85bcccf2b5b556940f892dc0983cf4c37 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 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b81c47525b32d6f0a817424be9f6071ab147ec45b090b439f66f8d97eba49df4 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b88c57afa21e51e441fae2945488954a3de7a16ddd32cf66f8d8f5266701a340 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b02fb2d4c9b1e8223725ad5fa3f85ece9c4a056b32fe8f81c448f7dad0373460 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 993bed180178156a70afdafe8aaf23a117107352 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 993bed180178156a70afdafe8aaf23a117107352: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3385: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343: undefined reference to `wext_proc_exit' net/core/net-procfs.c:327: undefined reference to `wext_proc_init' minimized to 46 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 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 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 5e4635681cf1a50f26f88af7a946375ec6908d58 testing commit 5e4635681cf1a50f26f88af7a946375ec6908d58 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ff55dd818deb74314d7d4c872c9b3b18588aaad68d203380b67df735e652a01c 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: 3h55m25.81299253s (build: 1h30m0.285965859s, test: 1h17m2.836705945s) crash still not fixed or there were kernel test errors commit msg: Revert "perf/aux: Fix AUX buffer serialization" 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 10e05c067 P4D 10e05c067 PUD 10e059067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 354 Comm: syz-executor.0 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4513 Code: c0 e9 ff eb bc 41 bc ff ff ff ff eb 87 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 42 28 48 89 7d d0 <4c> 8b 77 30 4c 89 45 c0 8b 80 28 04 00 00 4d 85 f6 89 45 cc 0f 84 RSP: 0018:ffffc900003d3d48 EFLAGS: 00010296 RAX: ffff888102380800 RBX: ffff888101199c18 RCX: ffff8881004a2410 RDX: ffff888108f5b718 RSI: ffffffff82e52a80 RDI: 0000000000000000 RBP: ffffc900003d3d88 R08: 0000000000000000 R09: ffffc900003d3b50 R10: ffff888108f5b7b8 R11: 0000000000000000 R12: ffff88810119b000 R13: ffff88810119b060 R14: ffffc900003d3dd8 R15: 0000000000000000 FS: 00007f535afb76c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010e06b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:638 [inline] dir_link+0x17e/0x250 fs/incfs/vfs.c:1313 vfs_link+0x207/0x320 fs/namei.c:4557 do_linkat+0x1f8/0x2c0 fs/namei.c:4628 __do_sys_linkat fs/namei.c:4656 [inline] __se_sys_linkat fs/namei.c:4653 [inline] __x64_sys_linkat+0x58/0x70 fs/namei.c:4653 x64_sys_call+0x2b3/0x990 arch/x86/include/generated/asm/syscalls_64.h:266 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f535b435da9 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:00007f535afb70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007f535b563f80 RCX: 00007f535b435da9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f535b48247a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f535b563f80 R15: 00007fffa9c99688 Modules linked in: CR2: 0000000000000030 ---[ end trace 3e936bdc5d3eae01 ]--- RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4513 Code: c0 e9 ff eb bc 41 bc ff ff ff ff eb 87 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 42 28 48 89 7d d0 <4c> 8b 77 30 4c 89 45 c0 8b 80 28 04 00 00 4d 85 f6 89 45 cc 0f 84 RSP: 0018:ffffc900003d3d48 EFLAGS: 00010296 RAX: ffff888102380800 RBX: ffff888101199c18 RCX: ffff8881004a2410 RDX: ffff888108f5b718 RSI: ffffffff82e52a80 RDI: 0000000000000000 RBP: ffffc900003d3d88 R08: 0000000000000000 R09: ffffc900003d3b50 R10: ffff888108f5b7b8 R11: 0000000000000000 R12: ffff88810119b000 R13: ffff88810119b060 R14: ffffc900003d3dd8 R15: 0000000000000000 FS: 00007f535afb76c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010e06b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c0 e9 ff shr $0xff,%cl 3: eb bc jmp 0xffffffc1 5: 41 bc ff ff ff ff mov $0xffffffff,%r12d b: eb 87 jmp 0xffffff94 d: 0f 1f 40 00 nopl 0x0(%rax) 11: 55 push %rbp 12: 48 89 e5 mov %rsp,%rbp 15: 41 57 push %r15 17: 41 56 push %r14 19: 41 55 push %r13 1b: 41 54 push %r12 1d: 53 push %rbx 1e: 48 83 ec 18 sub $0x18,%rsp 22: 48 8b 42 28 mov 0x28(%rdx),%rax 26: 48 89 7d d0 mov %rdi,-0x30(%rbp) * 2a: 4c 8b 77 30 mov 0x30(%rdi),%r14 <-- trapping instruction 2e: 4c 89 45 c0 mov %r8,-0x40(%rbp) 32: 8b 80 28 04 00 00 mov 0x428(%rax),%eax 38: 4d 85 f6 test %r14,%r14 3b: 89 45 cc mov %eax,-0x34(%rbp) 3e: 0f .byte 0xf 3f: 84 .byte 0x84