ci2 starts bisection 2026-08-31 11:44:04.887467904 +0000 UTC m=+226589.932994343 bisecting fixing commit since a64de05eba09515a3ca4721c5596929477e466b8 building syzkaller on 58bf20964a3d3d824806e70ab8a2e7e053082c9e ensuring issue is reproducible on original commit a64de05eba09515a3ca4721c5596929477e466b8 testing commit a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: dcd7036a89963e52fd246a1908067e94ccd782d21f53a0b6149748b8d6e7aee4 all runs: crashed: general protection fault in do_rmdir representative crash: general protection fault in do_rmdir, 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 a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 415568abd235b8bf11ee0ddff4f1dac2811652f49cc1c671f1c0a593fa8bd705 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7f124247d5acfe64aded640c4cba25d5cb8834683100981965a5871f280cd180 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 62b27668daf212d78eb90770863451946eeeee092f67d538c4ec6220a4527677 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, 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 a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2c2b26427907625c9049d7ab4a8e60554544ff995cbc482180f94064e3dff23e all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, 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 a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: dedba00451292c421ac5c91ca656f006449a2af7db1501296519a831d0e12b2c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, 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 a64de05eba09515a3ca4721c5596929477e466b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building a64de05eba09515a3ca4721c5596929477e466b8: net/socket.c:1188:(.text+0x210b): undefined reference to `wext_handle_ioctl' net/socket.c:3389:(.text+0x235f): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343:(.text+0x109): undefined reference to `wext_proc_exit' net/core/net-procfs.c:327:(.text+0x1e4): 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 54850912d011fff547909dc2d0685c29c546c685 testing commit 54850912d011fff547909dc2d0685c29c546c685 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8ac909e869a16a8ad66c31ae96530e85297c71760f3dfc5c7167060db14ec83f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in do_rmdir representative crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h14m6.193959217s (build: 16m10.090993894s, test: 50m49.016583133s) crash still not fixed or there were kernel test errors commit msg: Revert "virtio-mmio: fix device release warning on module unload" crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir BUG: kernel NULL pointer dereference, address: 0000000000000044 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 11aab3067 P4D 11aab3067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 452 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:do_rmdir+0x108/0x1d0 fs/namei.c:4210 Code: 81 c7 a0 00 00 00 e8 57 a2 ab 00 48 8b 75 b8 48 8d 7d c0 44 89 fa e8 57 8e ff ff 48 3d 00 f0 ff ff 49 89 c0 0f 87 a4 00 00 00 <48> 83 78 30 00 0f 84 83 00 00 00 48 8b 45 b0 48 8b 78 18 48 8b 45 RSP: 0018:ffffc90000447ea8 EFLAGS: 00010207 RAX: 0000000000000014 RBX: 00000000ffffff9c RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff888109682500 RBP: ffffc90000447f08 R08: 0000000000000014 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8881002f6000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007fd0dc02b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000044 CR3: 000000011aa7b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_rmdir fs/namei.c:4237 [inline] __se_sys_rmdir fs/namei.c:4235 [inline] __x64_sys_rmdir+0x3d/0x60 fs/namei.c:4235 x64_sys_call+0x736/0x990 arch/x86/include/generated/asm/syscalls_64.h:85 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fd0dc1c9e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd0dc02b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007fd0dc451fa0 RCX: 00007fd0dc1c9e59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007fd0dc25fe6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd0dc452038 R14: 00007fd0dc451fa0 R15: 00007ffcfeb348b8 Modules linked in: CR2: 0000000000000044 ---[ end trace 86224ddb2d11aea2 ]--- RIP: 0010:do_rmdir+0x108/0x1d0 fs/namei.c:4210 Code: 81 c7 a0 00 00 00 e8 57 a2 ab 00 48 8b 75 b8 48 8d 7d c0 44 89 fa e8 57 8e ff ff 48 3d 00 f0 ff ff 49 89 c0 0f 87 a4 00 00 00 <48> 83 78 30 00 0f 84 83 00 00 00 48 8b 45 b0 48 8b 78 18 48 8b 45 RSP: 0018:ffffc90000447ea8 EFLAGS: 00010207 RAX: 0000000000000014 RBX: 00000000ffffff9c RCX: 0000000400000000 RDX: 0000000000000003 RSI: 0000000300000000 RDI: ffff888109682500 RBP: ffffc90000447f08 R08: 0000000000000014 R09: 0000000000000064 R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8881002f6000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007fd0dc02b6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000044 CR3: 000000011aa7b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 81 c7 a0 00 00 00 add $0xa0,%edi 6: e8 57 a2 ab 00 call 0xaba262 b: 48 8b 75 b8 mov -0x48(%rbp),%rsi f: 48 8d 7d c0 lea -0x40(%rbp),%rdi 13: 44 89 fa mov %r15d,%edx 16: e8 57 8e ff ff call 0xffff8e72 1b: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 21: 49 89 c0 mov %rax,%r8 24: 0f 87 a4 00 00 00 ja 0xce * 2a: 48 83 78 30 00 cmpq $0x0,0x30(%rax) <-- trapping instruction 2f: 0f 84 83 00 00 00 je 0xb8 35: 48 8b 45 b0 mov -0x50(%rbp),%rax 39: 48 8b 78 18 mov 0x18(%rax),%rdi 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 45 rex.RB