ci2 starts bisection 2026-03-24 10:40:26.472634746 +0000 UTC m=+37402.634559792 bisecting fixing commit since fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 building syzkaller on 968edaf491504462b98e794257533160d7087792 ensuring issue is reproducible on original commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: fda203a5da7467c959fae8743201c55227e6317e39abef2439b7b7808196eb90 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 4922d086e7aa5c02a5bced71914edb39856a60c91c2cd367e5305cdb812e2343 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=4788 full=6023 leaves diff=246 split chunks (needed=false): <246> split chunk #0 of len 246 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 185b2ffcd9b5e242c4c6b8e23901b627dca9d0eb3c14cea6fd5158074aaecda0 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5c7d5d370fb32eba2bb1a30040b9dee50563718a8af2760da3ab3ac6264165bb all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 81dcf3f4886ca3023c5db5634c9d2825df15aca4a569a2e0e5aeb9a922fa4c44 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 0da57772dd73c0019a1d53a060de96a2e0f87f050c2a0088e3b7623c244e9b05 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit fbe98d68b6b391887a690d6f212fdc2ff29f1eb7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building fbe98d68b6b391887a690d6f212fdc2ff29f1eb7: 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 46 configs; suspects: [HID_ZEROPLUS 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 X86_X32 ZEROPLUS_FF] disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing current HEAD 9136079e403ad15ed26ea110e148d3555a295f84 testing commit 9136079e403ad15ed26ea110e148d3555a295f84 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 07fb49f11618383d8b9563a26ffa4d40f9edf57e7a76486e99916dc4ac9b8a81 all runs: crashed: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster representative crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster, types: [MEMORY_SAFETY_BUG] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 44m40.007151748s (build: 16m0.195098106s, test: 26m59.564070788s) crash still not fixed or there were kernel test errors commit msg: Revert "rpmsg: core: fix race in driver_override_show() and use core helper" crash: BUG: unable to handle kernel paging request in z_erofs_decompress_pcluster z_erofs_decompress_queue fs/erofs/zdata.c:1188 [inline] z_erofs_decompressqueue_work fs/erofs/zdata.c:1199 [inline] z_erofs_decompressqueue_kthread_work+0x56/0x90 fs/erofs/zdata.c:896 kthread_worker_fn+0xc8/0x280 kernel/kthread.c:759 kthread+0x14c/0x170 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ---[ end trace c50b06803bbf9f0a ]--- BUG: unable to handle page fault for address: ffff888918fffff8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3201067 P4D 3201067 PUD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 39 Comm: erofs_worker/1 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:z_erofs_decompress_pcluster.isra.0+0x243/0x9c0 fs/erofs/zdata.c:1043 Code: 41 bb 00 02 00 00 e9 fa fe ff ff 48 8b b5 98 fc ff ff 83 ff 02 49 89 f1 74 10 49 8b 04 24 41 8b 44 24 28 c1 f8 02 4c 8d 0c c6 <49> 8b 01 48 85 c0 74 35 48 8b 70 08 48 8d 7e ff 83 e6 01 48 0f 45 RSP: 0018:ffffc9000014baa8 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88810ee39e58 RCX: 0000000000000002 RDX: ffff88810ee39e10 RSI: ffff888119000000 RDI: 0000000000000000 RBP: ffffc9000014be70 R08: 0000000000000000 R09: ffff888918fffff8 R10: 0000000080000014 R11: 0000000000000003 R12: ffffea000463ef40 R13: ffffea000463ef80 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888918fffff8 CR3: 000000010971c000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: z_erofs_decompress_queue fs/erofs/zdata.c:1188 [inline] z_erofs_decompressqueue_work fs/erofs/zdata.c:1199 [inline] z_erofs_decompressqueue_kthread_work+0x56/0x90 fs/erofs/zdata.c:896 kthread_worker_fn+0xc8/0x280 kernel/kthread.c:759 kthread+0x14c/0x170 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: CR2: ffff888918fffff8 ---[ end trace c50b06803bbf9f0b ]--- RIP: 0010:z_erofs_decompress_pcluster.isra.0+0x243/0x9c0 fs/erofs/zdata.c:1043 Code: 41 bb 00 02 00 00 e9 fa fe ff ff 48 8b b5 98 fc ff ff 83 ff 02 49 89 f1 74 10 49 8b 04 24 41 8b 44 24 28 c1 f8 02 4c 8d 0c c6 <49> 8b 01 48 85 c0 74 35 48 8b 70 08 48 8d 7e ff 83 e6 01 48 0f 45 RSP: 0018:ffffc9000014baa8 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88810ee39e58 RCX: 0000000000000002 RDX: ffff88810ee39e10 RSI: ffff888119000000 RDI: 0000000000000000 RBP: ffffc9000014be70 R08: 0000000000000000 R09: ffff888918fffff8 R10: 0000000080000014 R11: 0000000000000003 R12: ffffea000463ef40 R13: ffffea000463ef80 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888918fffff8 CR3: 000000010971c000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 bb 00 02 00 00 mov $0x200,%r11d 6: e9 fa fe ff ff jmp 0xffffff05 b: 48 8b b5 98 fc ff ff mov -0x368(%rbp),%rsi 12: 83 ff 02 cmp $0x2,%edi 15: 49 89 f1 mov %rsi,%r9 18: 74 10 je 0x2a 1a: 49 8b 04 24 mov (%r12),%rax 1e: 41 8b 44 24 28 mov 0x28(%r12),%eax 23: c1 f8 02 sar $0x2,%eax 26: 4c 8d 0c c6 lea (%rsi,%rax,8),%r9 * 2a: 49 8b 01 mov (%r9),%rax <-- trapping instruction 2d: 48 85 c0 test %rax,%rax 30: 74 35 je 0x67 32: 48 8b 70 08 mov 0x8(%rax),%rsi 36: 48 8d 7e ff lea -0x1(%rsi),%rdi 3a: 83 e6 01 and $0x1,%esi 3d: 48 rex.W 3e: 0f .byte 0xf 3f: 45 rex.RB