ci2 starts bisection 2024-05-28 10:00:45.046737059 +0000 UTC m=+36995.710882469 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: d1a3731f49c5e76fdad9c2199e6c86e28b8b6630a92c113c69b24ccfd41c3d96 run #0: basic kernel testing failed: lost connection to test machine run #1: basic kernel testing failed: lost connection to test machine run #2: crashed: general protection fault in vfs_link run #3: crashed: general protection fault in vfs_link run #4: crashed: general protection fault in vfs_link run #5: crashed: general protection fault in vfs_link run #6: crashed: general protection fault in vfs_link run #7: crashed: general protection fault in vfs_link run #8: crashed: general protection fault in vfs_link run #9: crashed: general protection fault in vfs_link run #10: crashed: general protection fault in vfs_link run #11: crashed: general protection fault in vfs_link run #12: crashed: general protection fault in vfs_link run #13: crashed: general protection fault in vfs_link run #14: crashed: general protection fault in vfs_link run #15: crashed: general protection fault in vfs_link run #16: crashed: general protection fault in vfs_link run #17: crashed: general protection fault in vfs_link run #18: crashed: general protection fault in vfs_link run #19: 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 [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 kernel signature: 576fb799b21c505b601c804cad4a05533267cd7c8f8b52868624cde6c45c3f4f 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=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 [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: c26e4cad7effd42a01b30e2b6a845e5ef757f8925100e4f30d2d2eafc3df7e08 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 [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 kernel signature: f00f0887f6d09d660f57a8e9885e6ae27db18b9d134930d9a43befe628124ee4 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 [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: c62906516d43c0a456eec251fdc76c2a9c1836d4d38fcdee8900a0b26c74cfa8 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 [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 kernel signature: 40cbc5145984279383ea80ba998661457cc6a1b9f074b4a19391fa3476eba22c 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 [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 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing current HEAD 424f92bcbe8fa613ada7aec5ebe4ef434d5e50e4 testing commit 424f92bcbe8fa613ada7aec5ebe4ef434d5e50e4 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f278f892862d48e34e8a5aa5146c058ab6eea3a94b990db0882fe2457d1212b4 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: 33m20.456137889s (build: 12m9.262624403s, test: 19m39.448278207s) crash still not fixed or there were kernel test errors commit msg: Merge branch 'android13-5.15' into branch 'android13-5.15-lts' 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 111c27067 P4D 111c27067 PUD 114d13067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 344 Comm: syz-executor.0 Not tainted 5.15.149-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4513 Code: c5 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:ffffc900003abd58 EFLAGS: 00010292 RAX: ffff888102581000 RBX: ffff88810f89d018 RCX: ffff888108eff5b0 RDX: ffff888109dbd1f8 RSI: ffffffff82e52a80 RDI: 0000000000000000 RBP: ffffc900003abd98 R08: 0000000000000000 R09: ffffc900003abb60 R10: ffff888109dbd298 R11: 0000000000000000 R12: ffff88810f89c000 R13: ffff88810f89c060 R14: ffffc900003abde8 R15: 0000000000000000 FS: 00007f6ad2cdf6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010c92f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:610 [inline] dir_link+0x17e/0x250 fs/incfs/vfs.c:1285 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 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f6ad315dda9 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:00007f6ad2cdf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007f6ad328bf80 RCX: 00007f6ad315dda9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f6ad31aa47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6ad328bf80 R15: 00007ffe55db6f68 Modules linked in: CR2: 0000000000000030 ---[ end trace ab055280b1504eaf ]--- RIP: 0010:vfs_link+0x19/0x320 fs/namei.c:4513 Code: c5 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:ffffc900003abd58 EFLAGS: 00010292 RAX: ffff888102581000 RBX: ffff88810f89d018 RCX: ffff888108eff5b0 RDX: ffff888109dbd1f8 RSI: ffffffff82e52a80 RDI: 0000000000000000 RBP: ffffc900003abd98 R08: 0000000000000000 R09: ffffc900003abb60 R10: ffff888109dbd298 R11: 0000000000000000 R12: ffff88810f89c000 R13: ffff88810f89c060 R14: ffffc900003abde8 R15: 0000000000000000 FS: 00007f6ad2cdf6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010c92f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e9 ff eb bc 41 jmp 0x41bcec04 5: bc ff ff ff ff mov $0xffffffff,%esp a: eb 87 jmp 0xffffff93 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 55 push %rbp 11: 48 89 e5 mov %rsp,%rbp 14: 41 57 push %r15 16: 41 56 push %r14 18: 41 55 push %r13 1a: 41 54 push %r12 1c: 53 push %rbx 1d: 48 83 ec 18 sub $0x18,%rsp 21: 48 8b 42 28 mov 0x28(%rdx),%rax 25: 48 89 7d d0 mov %rdi,-0x30(%rbp) * 29: 4c 8b 77 30 mov 0x30(%rdi),%r14 <-- trapping instruction 2d: 4c 89 45 c0 mov %r8,-0x40(%rbp) 31: 8b 80 28 04 00 00 mov 0x428(%rax),%eax 37: 4d 85 f6 test %r14,%r14 3a: 89 45 cc mov %eax,-0x34(%rbp) 3d: 0f .byte 0xf 3e: 84 .byte 0x84