ci2 starts bisection 2025-11-29 14:35:12.050892631 +0000 UTC m=+263124.228015698 bisecting fixing commit since 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 building syzkaller on 7368264b463a401571d2eb381f50ea2a758e9d05 ensuring issue is reproducible on original commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 65b5986f887ff7de6f757048eb543fc6d16c3b255321b832861b174ddfce0022 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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 427507516966e50d341693d7f8a5c983fffbbb59309ec6f427aa4a9a3e93fc2a 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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed kconfig minimization: base=5186 full=6556 leaves diff=265 split chunks (needed=false): <265> split chunk #0 of len 265 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 07ea932d4cccd4004b7d286f37a7d53380ececb315381b5e3d18cacbe2ebbdff 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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a36af0283301294e17cea3365dee14ebefa06fae9546403710961533637ff3ff 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3ba608466fd93de791f579f52084741b0d27b18f7e9a9ff7dacb1fa5e2262902 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6bc144d17ab2b6486d7e4fed58504fa4f03ddb5dff44c1c38f3a0ccaf5440bb4 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building 3b4ff5af8d36f391ee0e6adf7b9d14d0d004de95: ld.lld: error: undefined symbol: wext_proc_init ld.lld: error: undefined symbol: wext_proc_exit ld.lld: error: undefined symbol: wext_handle_ioctl ld.lld: error: undefined symbol: compat_wext_handle_ioctl minimized to 53 configs; suspects: [HID_ZEROPLUS USB_MON USB_NET_CDC_MBIM 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_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 V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS 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 a92da54b770875ab263491bb8a70e602fe615ec8 testing commit a92da54b770875ab263491bb8a70e602fe615ec8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fd5af10f3acf864939946b5038553fc57d2f0a0057dbc91bb85e2b2dd7a5c465 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: 1h15m30.430667268s (build: 42m25.980336798s, test: 29m34.729474612s) crash still not fixed or there were kernel test errors commit msg: ANDROID: ABI: Update pixel symbol list crash: BUG: unable to handle kernel NULL pointer dereference in do_rmdir BUG: kernel NULL pointer dereference, address: 0000000000000045 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 1138b6067 P4D 1138b6067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 455 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:do_rmdir+0xdc/0x2b0 fs/namei.c:4251 Code: 00 49 8b 7e 30 4c 01 ef e8 21 32 c7 00 48 8d 7d b0 4c 89 75 a0 4c 89 f6 31 d2 e8 5f c2 ff ff 49 89 c6 48 3d 00 f0 ff ff 77 34 <49> 83 7e 30 00 74 1a 49 8b 7c 24 18 48 8b 45 a0 48 8b 70 30 4c 89 RSP: 0018:ffffc90000a07e88 EFLAGS: 00010203 RAX: 0000000000000015 RBX: ffff888100295000 RCX: 0000000000000003 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff8881113b8000 RBP: ffffc90000a07ef0 R08: ffff888113947500 R09: ffff888100041400 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881003267a0 R13: 00000000000000a0 R14: 0000000000000015 R15: 00000000ffffff9c FS: 00007ff7e86126c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000045 CR3: 0000000113a38000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_rmdir fs/namei.c:4278 [inline] __se_sys_rmdir fs/namei.c:4276 [inline] __x64_sys_rmdir+0x1e/0x30 fs/namei.c:4276 x64_sys_call+0x68e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:85 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff7e778eb69 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:00007ff7e8612038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007ff7e79b6080 RCX: 00007ff7e778eb69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200 RBP: 00007ff7e7811df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007ff7e79b6080 R15: 00007ffe587bcf48 Modules linked in: CR2: 0000000000000045 ---[ end trace 0000000000000000 ]--- RIP: 0010:do_rmdir+0xdc/0x2b0 fs/namei.c:4251 Code: 00 49 8b 7e 30 4c 01 ef e8 21 32 c7 00 48 8d 7d b0 4c 89 75 a0 4c 89 f6 31 d2 e8 5f c2 ff ff 49 89 c6 48 3d 00 f0 ff ff 77 34 <49> 83 7e 30 00 74 1a 49 8b 7c 24 18 48 8b 45 a0 48 8b 70 30 4c 89 RSP: 0018:ffffc90000a07e88 EFLAGS: 00010203 RAX: 0000000000000015 RBX: ffff888100295000 RCX: 0000000000000003 RDX: 00000000ffffff9c RSI: 0000000300000000 RDI: ffff8881113b8000 RBP: ffffc90000a07ef0 R08: ffff888113947500 R09: ffff888100041400 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881003267a0 R13: 00000000000000a0 R14: 0000000000000015 R15: 00000000ffffff9c FS: 00007ff7e86126c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000045 CR3: 0000000113a38000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 49 8b add %cl,-0x75(%rcx) 3: 7e 30 jle 0x35 5: 4c 01 ef add %r13,%rdi 8: e8 21 32 c7 00 call 0xc7322e d: 48 8d 7d b0 lea -0x50(%rbp),%rdi 11: 4c 89 75 a0 mov %r14,-0x60(%rbp) 15: 4c 89 f6 mov %r14,%rsi 18: 31 d2 xor %edx,%edx 1a: e8 5f c2 ff ff call 0xffffc27e 1f: 49 89 c6 mov %rax,%r14 22: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 28: 77 34 ja 0x5e * 2a: 49 83 7e 30 00 cmpq $0x0,0x30(%r14) <-- trapping instruction 2f: 74 1a je 0x4b 31: 49 8b 7c 24 18 mov 0x18(%r12),%rdi 36: 48 8b 45 a0 mov -0x60(%rbp),%rax 3a: 48 8b 70 30 mov 0x30(%rax),%rsi 3e: 4c rex.WR 3f: 89 .byte 0x89