ci2 starts bisection 2025-12-18 03:04:52.240276776 +0000 UTC m=+1863304.417399853
bisecting fixing commit since c750dc582629811994978507b7055b679be149f0
building syzkaller on 32a0e5edfeef60e894c453dc9e9ae45528626ef1
ensuring issue is reproducible on original commit c750dc582629811994978507b7055b679be149f0

testing commit c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f1bf268e637bc3fc4e2cceef6435bc590f86289772a18070b4443b5c99740051
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
check whether we can drop unnecessary instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 0725fe239c87286371572ba7b75f7988863f5ade45e85e79cff2579b0d09a11b
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
the bug reproduces without the instrumentation
disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], 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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: a3cb1a2e2aa123f392cf7e09f44c079bf4cafa694ccbd18216e1c715c9d7f328
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f7691102bf9cf100fb8151e14cd27a14f79291f594f257008e640deec90dc887
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
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 c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 7be34c5dc9d2674e6f0537903bc722db0038d288e51462d0f17bc36f4df1dc15
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
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 c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 0c78ff4516f08875b919dd1b0a82345fa457ad670b8d5e83b5572affd254b323
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
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 c750dc582629811994978507b7055b679be149f0 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
failed building c750dc582629811994978507b7055b679be149f0: 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 66807f9400bccd427eb939f1fde85393cb3e1f7c
testing commit 66807f9400bccd427eb939f1fde85393cb3e1f7c gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: c5cc6d3a5777d6b044b40aecd5ef2f30f2518413b10c57e768ff4e3a58e738e1
all runs: crashed: kernel panic: EXT4-fs (device loop2): panic forced after error
representative crash: kernel panic: EXT4-fs (device loop2): panic forced after error, types: [DoS]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 56m0.465374432s (build: 23m31.400738088s, test: 29m40.398831787s)
crash still not fixed or there were kernel test errors
commit msg: ANDROID: ABI: Update the symbol list for mtk
crash: kernel panic: EXT4-fs (device loop2): panic forced after error
loop2: detected capacity change from 0 to 512
ext4: Bad value for 'init_itable'
EXT4-fs error (device loop2): ext4_get_branch:178: inode #13: block 2: comm syz.2.17: invalid block
Kernel panic - not syncing: EXT4-fs (device loop2): panic forced after error
Kernel Offset: disabled
Rebooting in 86400 seconds..