ci2 starts bisection 2026-08-05 05:09:54.375830608 +0000 UTC m=+8612.461140223 bisecting fixing commit since c85054db46181ee85f10be997f41b347c85bd89b building syzkaller on 042555ffe14267d052b29fd8fea4f504d66e740a ensuring issue is reproducible on original commit c85054db46181ee85f10be997f41b347c85bd89b testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7d07efa4a5cb259ded8e9afeb4a2314b3d28a3f5321af024d8a6e063e7540246 all runs: crashed: general protection fault in fuse_atomic_open representative crash: general protection fault in fuse_atomic_open, 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 c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5144479ed6edd59469f7c3144f072933578305b62bb45fed72e34b712f83ef60 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], 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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 94422f68c9d9d46f8339ab72e29d8342145cf8f6612bfb0a86b36705a6656a7b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7e07faa774a39facd4496203a6b1f313a36313de6f047212839cb44daf9eec76 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, 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 c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 08c1ebe9e0639e710990f107604a52a152cb0f6eaaffcc6db6194aa28ce0fade all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: a77f205e3a585581aaadd0e6c0d6f1c4054d3f7cebe4ec1d95592ece63005d3c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building c85054db46181ee85f10be997f41b347c85bd89b: 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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD b885b84af7a2261321f1e4445bdd80290ff44655 testing commit b885b84af7a2261321f1e4445bdd80290ff44655 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1464439e118cce75346acc1d681cf8f97a5c571a5ca9a5fbd9b9aa69af9978fe all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open representative crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 2h0m3.511720056s (build: 26m36.860659213s, test: 51m0.771461824s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.15 into android13-5.15-lts crash: BUG: unable to handle kernel NULL pointer dereference in fuse_atomic_open BUG: kernel NULL pointer dereference, address: 0000000000000031 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 114a1b067 P4D 114a1b067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 456 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:fuse_atomic_open+0x49/0x120 fs/fuse/dir.c:875 Code: 89 e5 41 57 45 89 c7 41 56 49 89 d6 41 55 49 89 fd 41 54 49 89 f4 53 31 db 48 83 ec 10 f7 06 00 00 00 10 75 7a f6 c1 40 74 08 <49> 83 7c 24 30 00 74 1a 48 89 de 4c 89 f7 e8 64 c8 ea ff 48 83 c4 RSP: 0018:ffffc9000044fc70 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000008241 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88811b836b88 RBP: ffffc9000044fca8 R08: ffff88810df20f50 R09: ffff888112ba0c00 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88811b836800 R14: ffff888114302a00 R15: 0000000000008000 FS: 00007f397be3d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000031 CR3: 00000001142e6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: atomic_open fs/namei.c:3333 [inline] lookup_open fs/namei.c:3441 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x7d7/0x1230 fs/namei.c:3747 do_filp_open+0xb1/0x150 fs/namei.c:3777 do_sys_openat2+0x9c/0x250 fs/open.c:1236 do_sys_open fs/open.c:1252 [inline] __do_sys_creat fs/open.c:1328 [inline] __se_sys_creat fs/open.c:1322 [inline] __x64_sys_creat+0x46/0x60 fs/open.c:1322 x64_sys_call+0x72f/0x990 arch/x86/include/generated/asm/syscalls_64.h:86 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: 0033:0x7f397bffbe59 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:00007f397be3d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f397c275090 RCX: 00007f397bffbe59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f397c091e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f397c275128 R14: 00007f397c275090 R15: 00007ffc7ec97038 Modules linked in: CR2: 0000000000000031 ---[ end trace 0bdd007ae43230ad ]--- RIP: 0010:fuse_atomic_open+0x49/0x120 fs/fuse/dir.c:875 Code: 89 e5 41 57 45 89 c7 41 56 49 89 d6 41 55 49 89 fd 41 54 49 89 f4 53 31 db 48 83 ec 10 f7 06 00 00 00 10 75 7a f6 c1 40 74 08 <49> 83 7c 24 30 00 74 1a 48 89 de 4c 89 f7 e8 64 c8 ea ff 48 83 c4 RSP: 0018:ffffc9000044fc70 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000008241 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88811b836b88 RBP: ffffc9000044fca8 R08: ffff88810df20f50 R09: ffff888112ba0c00 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88811b836800 R14: ffff888114302a00 R15: 0000000000008000 FS: 00007f397be3d6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000031 CR3: 00000001142e6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 e5 mov %esp,%ebp 2: 41 57 push %r15 4: 45 89 c7 mov %r8d,%r15d 7: 41 56 push %r14 9: 49 89 d6 mov %rdx,%r14 c: 41 55 push %r13 e: 49 89 fd mov %rdi,%r13 11: 41 54 push %r12 13: 49 89 f4 mov %rsi,%r12 16: 53 push %rbx 17: 31 db xor %ebx,%ebx 19: 48 83 ec 10 sub $0x10,%rsp 1d: f7 06 00 00 00 10 testl $0x10000000,(%rsi) 23: 75 7a jne 0x9f 25: f6 c1 40 test $0x40,%cl 28: 74 08 je 0x32 * 2a: 49 83 7c 24 30 00 cmpq $0x0,0x30(%r12) <-- trapping instruction 30: 74 1a je 0x4c 32: 48 89 de mov %rbx,%rsi 35: 4c 89 f7 mov %r14,%rdi 38: e8 64 c8 ea ff call 0xffeac8a1 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c4 .byte 0xc4