ci2 starts bisection 2025-10-13 03:32:47.080675794 +0000 UTC m=+271965.859142301 bisecting fixing commit since 44db4837f75e09037bdef33d1b9d78100d41e2b7 building syzkaller on 163f510d99dcf7239e56cef53bbca39db1f2fd9b ensuring issue is reproducible on original commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 687a8cc181129b0661b390cf29cc58712171ffe71dfd4db0d0fb31e52d9bc88b all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5cfa7cfe6198f49c8304a670ce8b2e3f33966367bc587d44b765c533351b468f all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=5186 full=6549 leaves diff=266 split chunks (needed=false): <266> split chunk #0 of len 266 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 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5e368b5275df5da6aaf7f785e7eb40b0bd09dfe175ada600ccae0150ae3f70f4 all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d91e4148f1db6f25091a502d4fc0a0336d1c9d07796980d1e23f5e4d6dc19b2c all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a5e97995edbb239c371f482e1077311c52f0cbceca36a29aa74e1da6f7b371f all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [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 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0432927376e860228f381170859ec1f11d9fead6b31be0c385ad37d64a38d9b5 all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building 44db4837f75e09037bdef33d1b9d78100d41e2b7: ld.lld: error: undefined symbol: wext_proc_init ld.lld: error: undefined symbol: wext_proc_exit ld.lld: error: undefined symbol: wext_handle_ioctl ld.lld: error: undefined symbol: compat_wext_handle_ioctl minimized to 50 configs; suspects: [HID_ZEROPLUS 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_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 V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF] disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing current HEAD 11f4a3092db93def1074ee14c7066d8802b62943 testing commit 11f4a3092db93def1074ee14c7066d8802b62943 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0ae4d09198db5c8ad0015944c27e85bca27dff4f9b49c2847c01cd3442f3045e all runs: crashed: kernel BUG in mb_mark_used representative crash: kernel BUG in mb_mark_used, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h43m29.60441713s (build: 1h11m57.625632903s, test: 27m47.32209211s) crash still not fixed or there were kernel test errors commit msg: UPSTREAM: soc: qcom: mdt_loader: Deal with zero e_shentsize crash: kernel BUG in mb_mark_used ext4 filesystem being mounted at /0/file0 supports timestamps until 2038-01-19 (0x7fffffff) ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:1928! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 508 Comm: syz.2.16 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:mb_mark_used+0x46f/0x480 fs/ext4/mballoc.c:1928 Code: ff 48 0f ab 3e bf 01 00 00 00 eb cf 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 RSP: 0018:ffffc90000a2bb70 EFLAGS: 00010207 RAX: 0000000080000000 RBX: ffffc90000a2bcb8 RCX: ffff888112a8a000 RDX: 000000000000000c RSI: ffffffff80000000 RDI: 0000000000008000 RBP: ffffc90000a2bb98 R08: 0000000000000001 R09: 0000000000007fff R10: 0000000000008001 R11: 0000000000000000 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: ffffc90000a2bc20 R15: 000000000000000c FS: 00007f71037b26c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 000000011a793000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_trim_extent fs/ext4/mballoc.c:6441 [inline] ext4_try_to_trim_range+0x268/0x580 fs/ext4/mballoc.c:6501 ext4_trim_all_free fs/ext4/mballoc.c:6563 [inline] ext4_trim_fs+0x366/0x500 fs/ext4/mballoc.c:6654 __ext4_ioctl fs/ext4/ioctl.c:1491 [inline] ext4_ioctl+0x451/0x1640 fs/ext4/ioctl.c:1614 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x77/0xc0 fs/ioctl.c:856 __x64_sys_ioctl+0x18/0x20 fs/ioctl.c:856 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f710298d169 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:00007f71037b2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7102ba5fa0 RCX: 00007f710298d169 RDX: 0000400000000b40 RSI: 00000000c0185879 RDI: 0000000000000006 RBP: 00007f7102a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7102ba5fa0 R15: 00007ffc688ba318 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mb_mark_used+0x46f/0x480 fs/ext4/mballoc.c:1928 Code: ff 48 0f ab 3e bf 01 00 00 00 eb cf 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 0f 0b 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 RSP: 0018:ffffc90000a2bb70 EFLAGS: 00010207 RAX: 0000000080000000 RBX: ffffc90000a2bcb8 RCX: ffff888112a8a000 RDX: 000000000000000c RSI: ffffffff80000000 RDI: 0000000000008000 RBP: ffffc90000a2bb98 R08: 0000000000000001 R09: 0000000000007fff R10: 0000000000008001 R11: 0000000000000000 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: ffffc90000a2bc20 R15: 000000000000000c FS: 00007f71037b26c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 000000011a793000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400