ci2 starts bisection 2025-09-28 18:57:35.568943585 +0000 UTC m=+173968.929501833 bisecting fixing commit since eabc268e4fb2f800723f645bbc6177da523353b6 building syzkaller on 03fcfc4b7385b545a89a3fc62bef4e1ec7532e0d ensuring issue is reproducible on original commit eabc268e4fb2f800723f645bbc6177da523353b6 testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 016e685db9f522afb18ae62f6d163fb6b1ea3ed3228ee83a3301e2cb260c5947 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4db809199fe9e2a509ae979b76fb7cc6af54d805f41cdb88c87750189dfc4690 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] the bug reproduces without the instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=4921 full=6219 leaves diff=255 split chunks (needed=false): <255> split chunk #0 of len 255 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b05fa1a70a3d9a469a5bb466601d6b8d67d57115c336170ffbdbf85ceb1a5044 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fe904d337edcfb161231babc3c834d7e02eb8d383ed7fe84947a1ba85d4a9ee6 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5929904ea3d12b4e2b599b829eea8bf29b684cdd8f1bc74f0548f55eeef94111 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1886e7693ec708281652bfdd0a19d16b05e9185b37de43dee7c99e4da0d4a230 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit eabc268e4fb2f800723f645bbc6177da523353b6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building eabc268e4fb2f800723f645bbc6177da523353b6: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3390: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343: undefined reference to `wext_proc_exit' net/core/net-procfs.c:327: undefined reference to `wext_proc_init' minimized to 51 configs; suspects: [HID_ZEROPLUS USB_LINK_LAYER_TEST 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 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 [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing current HEAD 8d934e0056f7a129143e3553ecd5e99dfac57ac8 testing commit 8d934e0056f7a129143e3553ecd5e99dfac57ac8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0cdef0e2763a7c7b90bee367890675b92183199561bf12a40482c8cb5fa35536 all runs: crashed: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread representative crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread, types: [KASAN-NULL-POINTER-DEREFERENCE-WRITE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h36m32.38143707s (build: 56m44.919208201s, test: 37m22.673511113s) crash still not fixed or there were kernel test errors commit msg: Merge 5.15.193 into android13-5.15-lts crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: null-ptr-deref in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:111 [inline] BUG: KASAN: null-ptr-deref in __refcount_add include/linux/refcount.h:193 [inline] BUG: KASAN: null-ptr-deref in __refcount_inc include/linux/refcount.h:250 [inline] BUG: KASAN: null-ptr-deref in refcount_inc include/linux/refcount.h:267 [inline] BUG: KASAN: null-ptr-deref in get_task_struct include/linux/sched/task.h:106 [inline] BUG: KASAN: null-ptr-deref in kthread_stop+0x25/0x2e0 kernel/kthread.c:675 Write of size 4 at addr 0000000000000028 by task syz.3.50/724 CPU: 0 PID: 724 Comm: syz.3.50 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106 __kasan_report mm/kasan/report.c:431 [inline] kasan_report.cold+0x64/0xdb mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x148/0x190 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:111 [inline] __refcount_add include/linux/refcount.h:193 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] get_task_struct include/linux/sched/task.h:106 [inline] kthread_stop+0x25/0x2e0 kernel/kthread.c:675 f2fs_stop_gc_thread+0x56/0xc0 fs/f2fs/gc.c:198 f2fs_ioc_shutdown+0x2b0/0x670 fs/f2fs/file.c:2273 __f2fs_ioctl+0x2817/0x90d0 fs/f2fs/file.c:4192 f2fs_ioctl+0x162/0x4c0 fs/f2fs/file.c:4273 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x129/0x1a0 fs/ioctl.c:860 x64_sys_call+0x912/0x990 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5476766929 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:00007f54761b6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f547698e080 RCX: 00007f5476766929 RDX: 0000200000000140 RSI: 000000008004587d RDI: 0000000000000005 RBP: 00007f54767e8b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f547698e080 R15: 00007ffdf0ee0d18 ==================================================================