ci2 starts bisection 2024-04-13 18:48:46.171294933 +0000 UTC m=+101494.450074515 bisecting fixing commit since fc10db4b193239730f058050e153df17bfdceee7 building syzkaller on 77b23aa147a898d1e1912a5f01e6716bbdc3a59e ensuring issue is reproducible on original commit fc10db4b193239730f058050e153df17bfdceee7 testing commit fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7035f81d2c53e19e04f85508f007827ef57818dc7560a05d7eba49daf23f954a 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 fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: baa045b7c797389dfad2f2d9b794647883821ae5fa2e66d0ebbb1f9da8daf0ac 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4789 full=6019 leaves diff=238 split chunks (needed=false): <238> split chunk #0 of len 238 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 fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b9d6835aaab1d84161e5a8d57bba550f39b1c81fac8654066ef1d388b06f8734 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a6f0dc5a894474280598e45688a2aee38c345ae34ec573ed450c88a6d6fbd665 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1b0bf8c3cc232da3cbe53600955c3538536d4242b9510ba7bd9cf7204c88c678 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6945332cd975768e5617c01f5a275405cbb6f3695bef595085f36ba1ff814a9c 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit fc10db4b193239730f058050e153df17bfdceee7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building fc10db4b193239730f058050e153df17bfdceee7: net/socket.c:1128: undefined reference to `wext_handle_ioctl' net/socket.c:3397: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:346: undefined reference to `wext_proc_exit' net/core/net-procfs.c:330: 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 4e1bc8d8e8ae84440fa6a9b1b78164a39c5ed0e1 testing commit 4e1bc8d8e8ae84440fa6a9b1b78164a39c5ed0e1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4424b0c5be5b1e76fbf4f11e9d4eed07354beaa0bde37a141dbf6ac88b09f966 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: 2h25m28.739749392s (build: 1h0m13.788392405s, test: 53m9.232647227s) crash still not fixed or there were kernel test errors commit msg: Merge branch 'android13-5.10' into branch 'android13-5.10-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 10d1a0067 P4D 10d1a0067 PUD 1094da067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 348 Comm: syz-executor.0 Not tainted 5.10.209-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:vfs_link+0x19/0x380 fs/namei.c:4175 Code: 41 bd fe ff ff ff e9 29 fe ff ff 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 46 28 48 89 4d c0 <4c> 8b 67 30 8b 80 28 04 00 00 4d 85 e4 89 45 cc 0f 84 6b 01 00 00 RSP: 0018:ffffc900005d7d88 EFLAGS: 00010296 RAX: ffff8881011ab800 RBX: ffff8881111ce418 RCX: 0000000000000000 RDX: ffff888108f7f680 RSI: ffff88811143c2d8 RDI: 0000000000000000 RBP: ffffc900005d7dc8 R08: 0000000000000064 R09: ffff888108f7f680 R10: ffff888107fcbf30 R11: ffff88811143c378 R12: ffff8881111ccc00 R13: ffff8881111ccc60 R14: ffffc900005d7e18 R15: 0000000000000000 FS: 00007f41df2716c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010d2dc000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_link fs/incfs/vfs.c:604 [inline] dir_link+0x179/0x250 fs/incfs/vfs.c:1279 vfs_link+0x25a/0x380 fs/namei.c:4219 do_linkat+0x1f7/0x2c0 fs/namei.c:4287 __do_sys_linkat fs/namei.c:4311 [inline] __se_sys_linkat fs/namei.c:4308 [inline] __x64_sys_linkat+0x20/0x30 fs/namei.c:4308 do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f41df6efda9 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:00007f41df2710c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 00007f41df81df80 RCX: 00007f41df6efda9 RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f41df73c47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f41df81df80 R15: 00007fffe0186a08 Modules linked in: CR2: 0000000000000030 ---[ end trace 383cf1165ec251b1 ]--- RIP: 0010:vfs_link+0x19/0x380 fs/namei.c:4175 Code: 41 bd fe ff ff ff e9 29 fe ff ff 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 8b 46 28 48 89 4d c0 <4c> 8b 67 30 8b 80 28 04 00 00 4d 85 e4 89 45 cc 0f 84 6b 01 00 00 RSP: 0018:ffffc900005d7d88 EFLAGS: 00010296 RAX: ffff8881011ab800 RBX: ffff8881111ce418 RCX: 0000000000000000 RDX: ffff888108f7f680 RSI: ffff88811143c2d8 RDI: 0000000000000000 RBP: ffffc900005d7dc8 R08: 0000000000000064 R09: ffff888108f7f680 R10: ffff888107fcbf30 R11: ffff88811143c378 R12: ffff8881111ccc00 R13: ffff8881111ccc60 R14: ffffc900005d7e18 R15: 0000000000000000 FS: 00007f41df2716c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000030 CR3: 000000010d2dc000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 bd fe ff ff ff mov $0xfffffffe,%r13d 6: e9 29 fe ff ff jmp 0xfffffe34 b: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 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 46 28 mov 0x28(%rsi),%rax 26: 48 89 4d c0 mov %rcx,-0x40(%rbp) * 2a: 4c 8b 67 30 mov 0x30(%rdi),%r12 <-- trapping instruction 2e: 8b 80 28 04 00 00 mov 0x428(%rax),%eax 34: 4d 85 e4 test %r12,%r12 37: 89 45 cc mov %eax,-0x34(%rbp) 3a: 0f 84 6b 01 00 00 je 0x1ab