ci2 starts bisection 2026-01-25 08:54:38.241374933 +0000 UTC m=+83226.653650229
bisecting fixing commit since ba8b8b19339409d005e0b71075309daf1bbbcbb6
building syzkaller on 9882047a78fc9ecc64da219b2fb28f2708da44af
ensuring issue is reproducible on original commit ba8b8b19339409d005e0b71075309daf1bbbcbb6

testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: de83336897b5ddb8597d9629fbdc9343e937867d89dbfb674cd81498510ae953
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 83ad501766db2036e0f94552f9d7a342fced7646392a8e0e1f4768e93f69018d
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed
kconfig minimization: base=4788 full=6021 leaves diff=245
split chunks (needed=false): <245>
split chunk #0 of len 245 into 5 parts
testing without sub-chunk 1/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b142826dfeef908c50da4296327d87dd356b7ceb0b6798c3011d6365b5abba86
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1fc42e0dcc62da3e156019411eb48b6f58a9c813068cc3be959cb318b3ff8857
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 3ddf8cf9687108d58dc337a87839d3b3e8d4e09ec56a9e4211620a60222092fb
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 8d19fd6c48cb614a28543edff899c539175e104b740951820b79c3bece9f3787
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed
testing commit ba8b8b19339409d005e0b71075309daf1bbbcbb6 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
failed building ba8b8b19339409d005e0b71075309daf1bbbcbb6: net/socket.c:1128:(.text+0x837): undefined reference to `wext_handle_ioctl'
net/socket.c:3397:(.text+0xa28): 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 49 configs; suspects: [HID_ZEROPLUS 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 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 kasan locking atomic_sleep], they are not needed
testing current HEAD 5601baec60aab411c7242b0138233963c7781dc3
testing commit 5601baec60aab411c7242b0138233963c7781dc3 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: e14bd5e9fd83278d647ebf5d291e656a00680e5e932301f2d8de573a0692d33b
all runs: crashed: kernel BUG in ext4_flex_group_add
representative crash: kernel BUG in ext4_flex_group_add, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 40m24.501632721s (build: 13m0.607021402s, test: 26m3.307583635s)
crash still not fixed or there were kernel test errors
commit msg: Revert "usb: gadget: udc: fix use-after-free in usb_gadget_state_work"
crash: kernel BUG in ext4_flex_group_add
ext4 filesystem being mounted at /0/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop2): resizing filesystem from 0 to 8 blocks
------------[ cut here ]------------
kernel BUG at fs/ext4/resize.c:543!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 493 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:setup_new_flex_group_blocks fs/ext4/resize.c:543 [inline]
RIP: 0010:ext4_flex_group_add+0xb67/0x1b50 fs/ext4/resize.c:1499
Code: 89 f1 eb 04 44 8b 4d 80 48 8b 55 98 be 04 06 00 00 48 c7 c7 40 70 5e 82 44 89 4d 90 e8 12 e6 fb ff 44 8b 4d 90 e9 e3 f9 ff ff <0f> 0b e8 22 7e d7 ff 48 8b 85 38 ff ff ff 4d 63 f6 48 8b 40 70 4e
RSP: 0018:ffffc9000077bc18 EFLAGS: 00010297
RAX: ffff888117f7c000 RBX: ffff888117fd2800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000077bd18 R08: ffffc9000077bcb8 R09: 0000000000004000
R10: ffff888117fd3000 R11: 2073662d34545845 R12: 0000000000000001
R13: ffff888117f7c000 R14: 0000000000000006 R15: ffff888117fd3000
FS:  00007f7f7c4836c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f7c462d58 CR3: 0000000117f26000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_resize_fs+0xd55/0x11e0 fs/ext4/resize.c:2105
 __ext4_ioctl+0x55c/0x1990 fs/ext4/ioctl.c:1088
 ext4_ioctl+0x9/0x10 fs/ext4/ioctl.c:1340
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x89/0xc0 fs/ioctl.c:739
 do_syscall_64+0x32/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f7f7ca1d0b9
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:00007f7f7c483028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7f7cc49fa0 RCX: 00007f7f7ca1d0b9
RDX: 0000200000000140 RSI: 0000000040086610 RDI: 0000000000000004
RBP: 00007f7f7caaf9c4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7f7cc49fa0 R15: 00007ffd98415a18
Modules linked in:
---[ end trace 326fe58bd17a87f8 ]---
RIP: 0010:setup_new_flex_group_blocks fs/ext4/resize.c:543 [inline]
RIP: 0010:ext4_flex_group_add+0xb67/0x1b50 fs/ext4/resize.c:1499
Code: 89 f1 eb 04 44 8b 4d 80 48 8b 55 98 be 04 06 00 00 48 c7 c7 40 70 5e 82 44 89 4d 90 e8 12 e6 fb ff 44 8b 4d 90 e9 e3 f9 ff ff <0f> 0b e8 22 7e d7 ff 48 8b 85 38 ff ff ff 4d 63 f6 48 8b 40 70 4e
RSP: 0018:ffffc9000077bc18 EFLAGS: 00010297
RAX: ffff888117f7c000 RBX: ffff888117fd2800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000077bd18 R08: ffffc9000077bcb8 R09: 0000000000004000
R10: ffff888117fd3000 R11: 2073662d34545845 R12: 0000000000000001
R13: ffff888117f7c000 R14: 0000000000000006 R15: ffff888117fd3000
FS:  00007f7f7c4836c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f7ca6a800 CR3: 0000000117f26000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400