ci2 starts bisection 2026-07-21 15:51:05.042270755 +0000 UTC m=+21558.201080745
bisecting fixing commit since b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92
building syzkaller on 43bfcdb07c3552e4664e1029672054ac0924d543
ensuring issue is reproducible on original commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92

testing commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 63cf6d3bdf75e142b8cf2f4b287ffe7d8158d7981a318299cdbb8c6be3b0d1f5
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
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 b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 61378c2a7be8d07f87cd9b2f65d843280cda78b662b6a89a402df5005d0f3f8a
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the bug reproduces without the instrumentation
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
kconfig minimization: base=4921 full=6218 leaves diff=256
split chunks (needed=false): <256>
split chunk #0 of len 256 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 b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: dc54dfea1cdec672651c3d74438713dd9ecc9d01c3fa1ac5cd913b8ff0c1a9ca
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 12e3fdc0e0c90ca48acebb920f41a77e86b1ed7869c130729cf49971c13ffd04
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f35f523c54d59801c799abe6dc425d4e25cd18e7b916c0280530938c7c9f8403
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 64c347aa25b46b217fcb8426918e05c5108e3861660cb52d9b8b5140fd469e84
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
failed building b4be5dda13e9a1aeaa2db784c67cf19b00ccfc92: net/socket.c:1188:(.text+0x210b): undefined reference to `wext_handle_ioctl'
net/socket.c:3389:(.text+0x235f): undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:343:(.text+0x109): undefined reference to `wext_proc_exit'
net/core/net-procfs.c:327:(.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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing current HEAD 61d896ee2a8005c4e9d9da24421ba554601421be
testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: dc124809870d664884fc39d6cd5853be528901fe382a8951d15b892e7c069021
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 2h19m35.385646195s (build: 1h22m20.180416284s, test: 37m53.515547881s)
crash still not fixed or there were kernel test errors
commit msg: Revert "hdlc_ppp: sync per-proto timers before freeing hdlc state"
crash: lost connection to test machine