ci2 starts bisection 2026-10-21 09:38:42.526929983 +0000 UTC m=+16136.029873441 bisecting fixing commit since e334a66065d388b8f7c7b3fc17a23eff4181619e building syzkaller on 746171eef8d3611ed06d1a92ef68d5bee5031150 ensuring issue is reproducible on original commit e334a66065d388b8f7c7b3fc17a23eff4181619e testing commit e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: c77f1110bca9874d76c2554f412319850c6d12293b530d0c8338e474aa317372 all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, 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 e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ffb6f78ca2bb289cb76c5782e3cd06c74ef840baaf2903a41684b5a84dfee81a all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] 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=6024 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 e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5424ed7ebe368bedceecf50e2b626ca383b7164e85d09e816bcb751976e7dedb all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] 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 e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ef6d67743985c30a9ad105cb8ff2293b21b8529a24061585d64f74748b203895 all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 98985bf4a74400f192a368ca34501a8b517d76eca1c37dd107cbd6261bc9a6b0 all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 91ffd847daa470b9071282a5194c4a140087a3d77607e96616c106edd811e871 all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] 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 e334a66065d388b8f7c7b3fc17a23eff4181619e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building e334a66065d388b8f7c7b3fc17a23eff4181619e: net/socket.c:1129:(.text+0x817): undefined reference to `wext_handle_ioctl' net/socket.c:3398:(.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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing current HEAD 30b93835619a2b68eacf7c3d470d1bcfb15f7b66 testing commit 30b93835619a2b68eacf7c3d470d1bcfb15f7b66 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 4b360834687edfae94c94d25bae416c0520841a8f93ede325265dbb1cd91935c all runs: crashed: divide error in damon_reclaim_new_scheme representative crash: divide error in damon_reclaim_new_scheme, types: [DoS] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 2h19m59.486848811s (build: 37m7.424090705s, test: 1h2m59.512783536s) crash still not fixed or there were kernel test errors commit msg: Merge 3f7778b7513c ("xfrm: propagate extack to all netlink doit handlers") into android13-5.10-lts crash: divide error in damon_reclaim_new_scheme divide error: 0000 [#1] PREEMPT SMP CPU: 1 PID: 390 Comm: kworker/1:7 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: events damon_reclaim_timer_fn RIP: 0010:damon_reclaim_new_scheme+0xd3/0x110 mm/damon/reclaim.c:281 Code: 48 89 85 70 fc ff ff 48 8b 05 d9 6f ab 01 48 89 85 78 fc ff ff 48 8b 05 c3 6f ab 01 48 89 85 80 fc ff ff 48 8b 05 cd 6f ab 01 <48> f7 35 7e 6f ab 01 48 8d 95 40 fc ff ff 41 89 c0 52 31 d2 51 31 RSP: 0018:ffffc90000633a78 EFLAGS: 00010246 RAX: 0000000007270e00 RBX: 0000000000000001 RCX: ffffc90000633aa8 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000001000 RBP: ffffc90000633e38 R08: ffff888107186d50 R09: 00000000ffffffff R10: 000000023fffffff R11: 0000000000000018 R12: ffff8881133d9780 R13: ffff888237d4df00 R14: 0000000000000000 R15: ffff888237d498c0 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555569a16918 CR3: 0000000109707000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: damon_reclaim_turn mm/damon/reclaim.c:323 [inline] damon_reclaim_timer_fn+0xcb/0x200 mm/damon/reclaim.c:354 process_one_work+0x195/0x330 kernel/workqueue.c:2301 worker_thread+0x4e/0x340 kernel/workqueue.c:2447 kthread+0x14c/0x170 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace 8429792348acf93f ]--- RIP: 0010:damon_reclaim_new_scheme+0xd3/0x110 mm/damon/reclaim.c:281 Code: 48 89 85 70 fc ff ff 48 8b 05 d9 6f ab 01 48 89 85 78 fc ff ff 48 8b 05 c3 6f ab 01 48 89 85 80 fc ff ff 48 8b 05 cd 6f ab 01 <48> f7 35 7e 6f ab 01 48 8d 95 40 fc ff ff 41 89 c0 52 31 d2 51 31 RSP: 0018:ffffc90000633a78 EFLAGS: 00010246 RAX: 0000000007270e00 RBX: 0000000000000001 RCX: ffffc90000633aa8 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000001000 RBP: ffffc90000633e38 R08: ffff888107186d50 R09: 00000000ffffffff R10: 000000023fffffff R11: 0000000000000018 R12: ffff8881133d9780 R13: ffff888237d4df00 R14: 0000000000000000 R15: ffff888237d498c0 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555569a16918 CR3: 0000000109707000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 85 70 fc ff ff mov %rax,-0x390(%rbp) 7: 48 8b 05 d9 6f ab 01 mov 0x1ab6fd9(%rip),%rax # 0x1ab6fe7 e: 48 89 85 78 fc ff ff mov %rax,-0x388(%rbp) 15: 48 8b 05 c3 6f ab 01 mov 0x1ab6fc3(%rip),%rax # 0x1ab6fdf 1c: 48 89 85 80 fc ff ff mov %rax,-0x380(%rbp) 23: 48 8b 05 cd 6f ab 01 mov 0x1ab6fcd(%rip),%rax # 0x1ab6ff7 * 2a: 48 f7 35 7e 6f ab 01 divq 0x1ab6f7e(%rip) # 0x1ab6faf <-- trapping instruction 31: 48 8d 95 40 fc ff ff lea -0x3c0(%rbp),%rdx 38: 41 89 c0 mov %eax,%r8d 3b: 52 push %rdx 3c: 31 d2 xor %edx,%edx 3e: 51 push %rcx 3f: 31 .byte 0x31