ci2 starts bisection 2025-08-03 00:23:41.445442211 +0000 UTC m=+88818.869037359 bisecting fixing commit since 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d building syzkaller on e28266709dd2a1d1452d4a5bbf271700e10335c6 ensuring issue is reproducible on original commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7c816a08c9dbeedfb1189066c426cf2170ed5dcf589bae47f28320fd913228c2 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 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 44c2473fd66cff7f148856f7bcad8cc674a0882532a412cae42146cbb8d02ede 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 [atomic_sleep hang memleak ubsan kasan locking], they are not needed kconfig minimization: base=4921 full=6215 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 [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7098624f4905ae0c3d0ba35efd04409de04c0a622efb9412a4016e70068a46d8 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 [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5098e3c704f3a97fe1ed022960d70038e48cd880f823dbaa34465ee458c2c40 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 [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d916d63415a2b60e516f9e8f3d514ac124ef18db0ccd3f5eb7ada0264d024bc3 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 [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 375044b979ae1f3ce2ef01b2ef1598d4ec6ed2e86854dda9d8deba41261223dc 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 [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d: 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_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 X86_X32 ZEROPLUS_FF] disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing current HEAD f32b52534f1d4df1fc1a6afe6cf4639adebf8a63 testing commit f32b52534f1d4df1fc1a6afe6cf4639adebf8a63 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d024123bcff688c58f9d97c821888720d0e41ccc27ece37c46ea0b12eaef5d47 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: 1h43m13.982408313s (build: 38m18.946084082s, test: 56m35.377424347s) crash still not fixed or there were kernel test errors commit msg: Merge android13-5.15 into android13-5.15-lts crash: kernel BUG in mb_mark_used ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:1982! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 496 Comm: syz.2.16 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:mb_mark_used+0x2fe/0x320 fs/ext4/mballoc.c:1982 Code: 7e 18 e8 f5 ed ff ff 48 8b 45 d0 65 48 2b 04 25 28 00 00 00 75 23 48 83 c4 18 44 89 e8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b <0f> 0b 0f 0b 0f 0b 0f 0b 0f 0b 45 31 ed eb 90 e8 ae d9 9e 00 66 66 RSP: 0018:ffffc900004fbc88 EFLAGS: 00010286 RAX: 0000000000008000 RBX: ffffc900004fbd30 RCX: ffff888112f61000 RDX: 0000000080000000 RSI: ffffffff80000000 RDI: ffffc900004fbdb8 RBP: ffffc900004fbcc8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000000c R11: 0003333222211113 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0be104b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 000000010ed47000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_trim_extent fs/ext4/mballoc.c:6459 [inline] ext4_try_to_trim_range+0x23f/0x500 fs/ext4/mballoc.c:6519 ext4_trim_all_free fs/ext4/mballoc.c:6581 [inline] ext4_trim_fs+0x2ce/0x420 fs/ext4/mballoc.c:6672 __ext4_ioctl+0xc76/0x1570 fs/ext4/ioctl.c:1122 ext4_ioctl+0x9/0x10 fs/ext4/ioctl.c:1282 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+0x89/0xc0 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+0x33/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0be15d9169 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:00007f0be104b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0be17f1fa0 RCX: 00007f0be15d9169 RDX: 0000400000000b40 RSI: 00000000c0185879 RDI: 0000000000000006 RBP: 00007f0be165a2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0be17f1fa0 R15: 00007ffef640d988 Modules linked in: ---[ end trace 46915d43dff916a3 ]--- RIP: 0010:mb_mark_used+0x2fe/0x320 fs/ext4/mballoc.c:1982 Code: 7e 18 e8 f5 ed ff ff 48 8b 45 d0 65 48 2b 04 25 28 00 00 00 75 23 48 83 c4 18 44 89 e8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b <0f> 0b 0f 0b 0f 0b 0f 0b 0f 0b 45 31 ed eb 90 e8 ae d9 9e 00 66 66 RSP: 0018:ffffc900004fbc88 EFLAGS: 00010286 RAX: 0000000000008000 RBX: ffffc900004fbd30 RCX: ffff888112f61000 RDX: 0000000080000000 RSI: ffffffff80000000 RDI: ffffc900004fbdb8 RBP: ffffc900004fbcc8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000000c R11: 0003333222211113 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0be104b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 000000010ed47000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400