ci2 starts bisection 2026-04-23 01:20:47.348173184 +0000 UTC m=+12627.167858887 bisecting fixing commit since 58c592510fcd5577e655b9aca5c018b1af4ae229 building syzkaller on 4c131dc4b96f069f4177bf6cdd08431aaf9add88 ensuring issue is reproducible on original commit 58c592510fcd5577e655b9aca5c018b1af4ae229 testing commit 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ddce0bc9a044e7eaad956b39bd6539b0c500d59d25b9d9c1d03063052a869f72 all runs: crashed: general protection fault in mnt_want_write representative crash: general protection fault in mnt_want_write, 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 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 95aec0205e5b924c54f759dd8d83e0e23dd25a974c284c6d4e09bbb0149ecc3f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, 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=4788 full=6025 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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 97fd8c49a5300370d88cc32e32a06c8ee127edc63a9bcd12321a209fbb3f03c3 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5dfd15c4b35c372434c9c99662249f2ab03712c1c428b70acf4abb9ea0c16842 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, 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 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d8c500502a389a71b77804240b2c85161f6714aad8d124c612dc413306784a0b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 65e80273c07be095ecfa83d5731011b2ffa7fadb6746cce736e0f0af1fc02d9f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit 58c592510fcd5577e655b9aca5c018b1af4ae229 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building 58c592510fcd5577e655b9aca5c018b1af4ae229: net/socket.c:1128:(.text+0x817): undefined reference to `wext_handle_ioctl' net/socket.c:3397:(.text+0xa08): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:346:(.text+0x109): undefined reference to `wext_proc_exit' net/core/net-procfs.c:330:(.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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing current HEAD d8c55bf860fdac8594dd7256d0700deecbd6d8f9 testing commit d8c55bf860fdac8594dd7256d0700deecbd6d8f9 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: eac1ca80737f53669f2f0345d2e2bd941151b1811cd32c216184b3f35e61a119 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write representative crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write, types: [NULL-POINTER-DEREFERENCE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h9m44.189062562s (build: 23m1.476432805s, test: 29m50.663061687s) crash still not fixed or there were kernel test errors commit msg: Merge 8820ffe0975f ("net: macb: fix use-after-free access to PTP clock") into android13-5.10-lts crash: BUG: unable to handle kernel NULL pointer dereference in mnt_want_write incfs: Can't find or create .incomplete dir in ./file0 incfs: mount failed -22 incfs: ino conflict with backing FS 2 BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 10f1f4067 P4D 10f1f4067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 469 Comm: syz.2.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:mnt_want_write+0xa/0xd0 fs/namespace.c:363 Code: 44 89 e0 41 5c 5d c3 48 8b 43 08 f6 40 50 01 75 cb eb d7 e8 c7 37 c9 ff 5b 44 89 e0 41 5c 5d c3 55 48 89 e5 41 54 53 48 89 fb <4c> 8b 67 08 bf 01 00 00 00 e8 e8 35 e0 ff 41 8b 84 24 a8 02 00 00 RSP: 0018:ffffc900005ebcd0 EFLAGS: 00010246 RAX: ffff8881171d3060 RBX: 0000000000000000 RCX: 0000000000000350 RDX: ffff88810c89a6c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900005ebce0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888109c8b9c0 R13: ffff888109c8b9c0 R14: 0000000000000000 R15: ffffc900005ebe50 FS: 00007f6640cae6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000118e14000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ovl_want_write+0x1b/0x20 fs/overlayfs/util.c:21 ovl_setattr+0x37/0x1c0 fs/overlayfs/inode.c:28 notify_change+0x339/0x490 fs/attr.c:410 incfs_setattr+0x98/0x100 fs/incfs/vfs.c:1664 notify_change+0x339/0x490 fs/attr.c:410 chmod_common+0x89/0x150 fs/open.c:584 do_fchmodat+0x5d/0xb0 fs/open.c:622 __do_sys_chmod fs/open.c:640 [inline] __se_sys_chmod fs/open.c:638 [inline] __x64_sys_chmod+0x16/0x20 fs/open.c:638 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f6640e49eb9 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:00007f6640cae028 EFLAGS: 00000246 ORIG_RAX: 000000000000005a RAX: ffffffffffffffda RBX: 00007f66410c4fa0 RCX: 00007f6640e49eb9 RDX: 0000000000000000 RSI: 0000000000000054 RDI: 0000200000000000 RBP: 00007f6640eb7c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66410c5038 R14: 00007f66410c4fa0 R15: 00007ffcd6cb9138 Modules linked in: CR2: 0000000000000008 ---[ end trace 51c030596796b9df ]--- RIP: 0010:mnt_want_write+0xa/0xd0 fs/namespace.c:363 Code: 44 89 e0 41 5c 5d c3 48 8b 43 08 f6 40 50 01 75 cb eb d7 e8 c7 37 c9 ff 5b 44 89 e0 41 5c 5d c3 55 48 89 e5 41 54 53 48 89 fb <4c> 8b 67 08 bf 01 00 00 00 e8 e8 35 e0 ff 41 8b 84 24 a8 02 00 00 RSP: 0018:ffffc900005ebcd0 EFLAGS: 00010246 RAX: ffff8881171d3060 RBX: 0000000000000000 RCX: 0000000000000350 RDX: ffff88810c89a6c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900005ebce0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888109c8b9c0 R13: ffff888109c8b9c0 R14: 0000000000000000 R15: ffffc900005ebe50 FS: 00007f6640cae6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000118e14000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 44 89 e0 mov %r12d,%eax 3: 41 5c pop %r12 5: 5d pop %rbp 6: c3 ret 7: 48 8b 43 08 mov 0x8(%rbx),%rax b: f6 40 50 01 testb $0x1,0x50(%rax) f: 75 cb jne 0xffffffdc 11: eb d7 jmp 0xffffffea 13: e8 c7 37 c9 ff call 0xffc937df 18: 5b pop %rbx 19: 44 89 e0 mov %r12d,%eax 1c: 41 5c pop %r12 1e: 5d pop %rbp 1f: c3 ret 20: 55 push %rbp 21: 48 89 e5 mov %rsp,%rbp 24: 41 54 push %r12 26: 53 push %rbx 27: 48 89 fb mov %rdi,%rbx * 2a: 4c 8b 67 08 mov 0x8(%rdi),%r12 <-- trapping instruction 2e: bf 01 00 00 00 mov $0x1,%edi 33: e8 e8 35 e0 ff call 0xffe03620 38: 41 8b 84 24 a8 02 00 mov 0x2a8(%r12),%eax 3f: 00