ci2 starts bisection 2025-07-28 04:56:34.395543855 +0000 UTC m=+280812.101004901 bisecting fixing commit since d76d4cd0623a12e7a5512e26fee809feb445b26b building syzkaller on 4826c28ef2aca1ee7dba7111e48d3b6a9c83d9a8 ensuring issue is reproducible on original commit d76d4cd0623a12e7a5512e26fee809feb445b26b testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 414c7399ca405dfc42dad0fd632e1a91541468da31ccc9a94b374fe7656b9039 all runs: crashed: general protection fault in open_or_create_special_dir representative crash: general protection fault in open_or_create_special_dir, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1c80bfc90aaea60bc4b17f5e8dad871e8362722e58766d55e370929acd54545 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=4788 full=6022 leaves diff=244 split chunks (needed=false): <244> split chunk #0 of len 244 into 5 parts testing without sub-chunk 1/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f45921c70f9848794b96cc429cc1dcb69aa0a9b2d3dbbce0533ea601bf5f8660 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb3dc02a2b8d61b9e2331b8e0ef55d895b1f07d777fec1f3771f4c4814b4c579 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7de7b937be429fd2f5cbc65fcc19098913c71a06e97a4e179861e1389a4423d9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 71784c27852a3c3c410f6ddc0d128b496dd8cdc1202b0555585649969857aeeb all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit d76d4cd0623a12e7a5512e26fee809feb445b26b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building d76d4cd0623a12e7a5512e26fee809feb445b26b: 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 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE 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 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 USB_XHCI_PCI_RENESAS 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 ZEROPLUS_FF] disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD ad9a98ef27a4166b73b1a487f0445e75bd02d580 testing commit ad9a98ef27a4166b73b1a487f0445e75bd02d580 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 06f948598eb968d8084c221883780ecd30c52f61ce994e72e51cf9f98a5639b2 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir representative crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h20m9.020198341s (build: 21m30.007321743s, test: 56m51.544599262s) crash still not fixed or there were kernel test errors commit msg: Revert "vm_sockets: Add flags field in the vsock address data structure" crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir BUG: kernel NULL pointer dereference, address: 0000000000000035 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 116b4f067 P4D 116b4f067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 448 Comm: syz.2.16 Not tainted 5.10.240-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:open_or_create_special_dir+0x27/0xc0 fs/incfs/vfs.c:474 Code: 00 00 00 55 48 89 e5 41 56 41 55 41 54 53 48 89 d3 4c 8b 6f 30 e8 f9 96 ff ff 48 85 c0 74 6f 48 3d 00 f0 ff ff 49 89 c4 77 0a <48> 83 78 30 00 74 0f c6 03 00 5b 4c 89 e0 41 5c 41 5d 41 5e 5d c3 RSP: 0018:ffffc90000653db8 EFLAGS: 00010207 RAX: 0000000000000005 RBX: ffffc90000653def RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000500000000 RDI: ffff88810e6258a0 RBP: ffffc90000653dd8 R08: 0000000000000006 R09: 0000000000000064 R10: ffff888117867c60 R11: 0000000000000000 R12: 0000000000000005 R13: ffff88810e625800 R14: ffff888117900000 R15: ffff888116913780 FS: 00007fbbfd0d06c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000035 CR3: 0000000116919000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: incfs_mount_fs+0x1af/0x320 fs/incfs/vfs.c:1867 legacy_get_tree+0x26/0x50 fs/fs_context.c:593 vfs_get_tree+0x1a/0x70 fs/super.c:1572 do_new_mount fs/namespace.c:2919 [inline] path_mount+0x2f8/0xb90 fs/namespace.c:3249 do_mount fs/namespace.c:3262 [inline] __do_sys_mount fs/namespace.c:3470 [inline] __se_sys_mount fs/namespace.c:3447 [inline] __x64_sys_mount+0x103/0x140 fs/namespace.c:3447 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbbfd680929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbbfd0d0038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbbfd8a8080 RCX: 00007fbbfd680929 RDX: 0000200000000180 RSI: 0000200000000080 RDI: 0000200000000000 RBP: 00007fbbfd702b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fbbfd8a8080 R15: 00007ffce56815a8 Modules linked in: CR2: 0000000000000035 ---[ end trace 57e5812ba31271b4 ]--- RIP: 0010:open_or_create_special_dir+0x27/0xc0 fs/incfs/vfs.c:474 Code: 00 00 00 55 48 89 e5 41 56 41 55 41 54 53 48 89 d3 4c 8b 6f 30 e8 f9 96 ff ff 48 85 c0 74 6f 48 3d 00 f0 ff ff 49 89 c4 77 0a <48> 83 78 30 00 74 0f c6 03 00 5b 4c 89 e0 41 5c 41 5d 41 5e 5d c3 RSP: 0018:ffffc90000653db8 EFLAGS: 00010207 RAX: 0000000000000005 RBX: ffffc90000653def RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000500000000 RDI: ffff88810e6258a0 RBP: ffffc90000653dd8 R08: 0000000000000006 R09: 0000000000000064 R10: ffff888117867c60 R11: 0000000000000000 R12: 0000000000000005 R13: ffff88810e625800 R14: ffff888117900000 R15: ffff888116913780 FS: 00007fbbfd0d06c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000035 CR3: 0000000116919000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 55 48 add %dl,0x48(%rbp) 5: 89 e5 mov %esp,%ebp 7: 41 56 push %r14 9: 41 55 push %r13 b: 41 54 push %r12 d: 53 push %rbx e: 48 89 d3 mov %rdx,%rbx 11: 4c 8b 6f 30 mov 0x30(%rdi),%r13 15: e8 f9 96 ff ff call 0xffff9713 1a: 48 85 c0 test %rax,%rax 1d: 74 6f je 0x8e 1f: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 25: 49 89 c4 mov %rax,%r12 28: 77 0a ja 0x34 * 2a: 48 83 78 30 00 cmpq $0x0,0x30(%rax) <-- trapping instruction 2f: 74 0f je 0x40 31: c6 03 00 movb $0x0,(%rbx) 34: 5b pop %rbx 35: 4c 89 e0 mov %r12,%rax 38: 41 5c pop %r12 3a: 41 5d pop %r13 3c: 41 5e pop %r14 3e: 5d pop %rbp 3f: c3 ret