ci2 starts bisection 2025-12-23 03:07:54.986070311 +0000 UTC m=+2295487.163193368 bisecting fixing commit since ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e building syzkaller on 686bf6572b519f4c79772e87d617d0eceaf20dca ensuring issue is reproducible on original commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4d04029919f93764fff9dff4dfb642e026f06f8199547a9ffab3fa3e99a9b653 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: general protection fault in open_or_create_special_dir run #3: crashed: general protection fault in open_or_create_special_dir run #4: crashed: general protection fault in open_or_create_special_dir run #5: crashed: general protection fault in open_or_create_special_dir run #6: crashed: general protection fault in open_or_create_special_dir run #7: crashed: general protection fault in open_or_create_special_dir run #8: crashed: general protection fault in open_or_create_special_dir run #9: crashed: general protection fault in open_or_create_special_dir run #10: crashed: general protection fault in open_or_create_special_dir run #11: crashed: general protection fault in open_or_create_special_dir run #12: crashed: general protection fault in open_or_create_special_dir run #13: crashed: general protection fault in open_or_create_special_dir run #14: crashed: general protection fault in open_or_create_special_dir run #15: crashed: general protection fault in open_or_create_special_dir run #16: crashed: general protection fault in open_or_create_special_dir run #17: crashed: general protection fault in open_or_create_special_dir run #18: crashed: general protection fault in open_or_create_special_dir run #19: 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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e41e3c15054987f2d04ece70243661248113d099398622c52632d0ffcdcf3c9b 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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed kconfig minimization: base=4788 full=6026 leaves diff=248 split chunks (needed=false): <248> split chunk #0 of len 248 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 ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 32d91a0bf09db69b87ce0ce10c156eed8ae95be70b681b5f98de0474c535b8a3 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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fa717aa6c14e6996562594a646b1756408e6a0e31d411a856caced948768018e 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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2b20cb0f7e8ee9ea5313fdd05e2c8b9211f979590b3bdd92841a209488fc6192 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5bcd222c278193e8be5ffbdf84e4d13b25be6dc28c703d27dcbabb00625d9236 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 [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building ab3e1c0dd1ff17ac9e51b12bb4c67a62be3b205e: 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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing current HEAD e253c52bbdfce1f214777784549a350a8f9ba3b8 testing commit e253c52bbdfce1f214777784549a350a8f9ba3b8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cf21713735443c040fd9e37d24e0b2165cac04e17516327718571db27d92a23d 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: 1h6m22.278636838s (build: 35m33.76469527s, test: 29m23.981194029s) crash still not fixed or there were kernel test errors commit msg: Merge 5.10.247 into android13-5.10-lts crash: BUG: unable to handle kernel NULL pointer dereference in open_or_create_special_dir BUG: kernel NULL pointer dereference, address: 0000000000000038 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 118973067 P4D 118973067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 456 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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:ffffc900007b3db8 EFLAGS: 00010203 RAX: 0000000000000008 RBX: ffffc900007b3def RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000500000000 RDI: ffff88810ea254a0 RBP: ffffc900007b3dd8 R08: 0000000000000006 R09: 0000000000000064 R10: ffff8881097eca80 R11: 0000000000000000 R12: 0000000000000008 R13: ffff88810ea25400 R14: ffff88811188d000 R15: ffff8881173fdb40 FS: 00007fbe20ae86c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 00000001188ce000 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:3006 [inline] path_mount+0x2f8/0xbc0 fs/namespace.c:3336 do_mount fs/namespace.c:3349 [inline] __do_sys_mount fs/namespace.c:3557 [inline] __se_sys_mount fs/namespace.c:3534 [inline] __x64_sys_mount+0x103/0x140 fs/namespace.c:3534 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbe20c786c9 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:00007fbe20ae8038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbe20ecefa0 RCX: 00007fbe20c786c9 RDX: 0000200000000780 RSI: 0000200000000140 RDI: 0000200000000580 RBP: 00007fbe20cfaf91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbe20ecf038 R14: 00007fbe20ecefa0 R15: 00007ffe4dac5be8 Modules linked in: CR2: 0000000000000038 ---[ end trace bac7d618c131cc5a ]--- 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:ffffc900007b3db8 EFLAGS: 00010203 RAX: 0000000000000008 RBX: ffffc900007b3def RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000500000000 RDI: ffff88810ea254a0 RBP: ffffc900007b3dd8 R08: 0000000000000006 R09: 0000000000000064 R10: ffff8881097eca80 R11: 0000000000000000 R12: 0000000000000008 R13: ffff88810ea25400 R14: ffff88811188d000 R15: ffff8881173fdb40 FS: 00007fbe20ae86c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 00000001188ce000 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