ci2 starts bisection 2026-08-17 02:50:13.233392916 +0000 UTC m=+183565.231631028 bisecting fixing commit since 7f4b368e04101e5f8788b55d139505e6cb5e0b67 building syzkaller on fec2a7ee1d4f109a1c346571a9a43b32c568e770 ensuring issue is reproducible on original commit 7f4b368e04101e5f8788b55d139505e6cb5e0b67 testing commit 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9046a9b0eecb3e19e29d3c70058660c9fe973bed9a2ed0d08df58f6d96f23136 all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 617c66301cc14461082d4c09b7a857784ef40a7fd18f67886df64de8a5ff5bc0 all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [BUG] the bug reproduces without the instrumentation disabling configs for [memleak ubsan kasan locking atomic_sleep hang], 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], they are not needed testing commit 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9cd8d00bc5fa473e757be73850fc168ac0e6dd8f4a16d46a9b651b22f0fec0b5 all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [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 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: fefac32b6e0ab8d8c942be2e9ceed81c6a8ca254aeb1afb4b40f23a8a60b6f1a all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [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 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b9aca64acbe6a89e9c75c5d2edb9491d61105cabcb4ca6b8d53aa8e96ff61186 all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9d2c67687b87cbb4097c07b058ec82e667174ea4164e25b29e9afdc35f8de223 run #0: crashed: kernel BUG in ext4_alloc_file_blocks run #1: crashed: kernel BUG in ext4_alloc_file_blocks run #2: crashed: kernel BUG in ext4_alloc_file_blocks run #3: crashed: kernel BUG in ext4_alloc_file_blocks run #4: crashed: kernel BUG in ext4_alloc_file_blocks run #5: crashed: kernel BUG in ext4_alloc_file_blocks run #6: crashed: kernel BUG in ext4_alloc_file_blocks run #7: crashed: kernel BUG in ext4_alloc_file_blocks run #8: crashed: kernel BUG in ext4_alloc_file_blocks run #9: OK representative crash: kernel BUG in ext4_alloc_file_blocks, types: [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 7f4b368e04101e5f8788b55d139505e6cb5e0b67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building 7f4b368e04101e5f8788b55d139505e6cb5e0b67: net/socket.c:1188:(.text+0x216b): undefined reference to `wext_handle_ioctl' net/socket.c:3389:(.text+0x23bf): 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 [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 54275df9611d69042112cf28b00353757bb70e67 testing commit 54275df9611d69042112cf28b00353757bb70e67 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2eeb86cfc91d81c1125b2f45fdaec1c17f00c287a349a1a8d28b48e000ac0a4b all runs: crashed: kernel BUG in ext4_alloc_file_blocks representative crash: kernel BUG in ext4_alloc_file_blocks, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h55m1.931097384s (build: 19m52.306236007s, test: 1h23m33.419185886s) crash still not fixed or there were kernel test errors commit msg: Revert "slimbus: Convert to platform remove callback returning void" crash: kernel BUG in ext4_alloc_file_blocks ------------[ cut here ]------------ kernel BUG at fs/ext4/extents.c:4526! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 506 Comm: syz.0.22 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:ext4_alloc_file_blocks.isra.0+0x308/0x320 fs/ext4/extents.c:4526 Code: e9 74 fe ff ff 0f b7 03 c7 44 24 1c 01 00 00 00 66 25 00 f0 66 3d 00 80 75 b4 48 8b 83 a0 00 00 00 48 85 c0 75 a8 0f 0b eb a4 <0f> 0b 45 85 e4 b8 00 00 00 00 44 0f 4f e0 e9 a7 fe ff ff e8 10 36 RSP: 0018:ffffc90000613cb0 EFLAGS: 00010246 RAX: 0000008410000000 RBX: 0000000000000404 RCX: 0000000000000000 RDX: 000000007fffffff RSI: 0000000000000000 RDI: ffff88810b62a198 RBP: ffffc90000613d28 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810aded3c0 R13: 000000000000000b R14: ffff88810b62a198 R15: 000003fffffff404 FS: 00007f0e5859a6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001840 CR3: 00000001121da000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_zero_range fs/ext4/extents.c:4676 [inline] ext4_fallocate+0xeab/0x1130 fs/ext4/extents.c:4811 vfs_fallocate+0x14d/0x390 fs/open.c:309 ioctl_preallocate+0x8d/0xb0 fs/ioctl.c:294 file_ioctl fs/ioctl.c:339 [inline] do_vfs_ioctl+0x6db/0x7e0 fs/ioctl.c:853 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x6a/0xc0 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: 0033:0x7f0e58758e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0e5859a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0e589d2090 RCX: 00007f0e58758e59 RDX: 0000200000000180 RSI: 0000000040305839 RDI: 0000000000000005 RBP: 00007f0e587eed6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0e589d2128 R14: 00007f0e589d2090 R15: 00007ffca3f44f68 Modules linked in: ---[ end trace 6db20ed5bd39388b ]--- RIP: 0010:ext4_alloc_file_blocks.isra.0+0x308/0x320 fs/ext4/extents.c:4526 Code: e9 74 fe ff ff 0f b7 03 c7 44 24 1c 01 00 00 00 66 25 00 f0 66 3d 00 80 75 b4 48 8b 83 a0 00 00 00 48 85 c0 75 a8 0f 0b eb a4 <0f> 0b 45 85 e4 b8 00 00 00 00 44 0f 4f e0 e9 a7 fe ff ff e8 10 36 RSP: 0018:ffffc90000613cb0 EFLAGS: 00010246 RAX: 0000008410000000 RBX: 0000000000000404 RCX: 0000000000000000 RDX: 000000007fffffff RSI: 0000000000000000 RDI: ffff88810b62a198 RBP: ffffc90000613d28 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810aded3c0 R13: 000000000000000b R14: ffff88810b62a198 R15: 000003fffffff404 FS: 00007f0e5859a6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000baa0a6c5000 CR3: 00000001121da000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400