ci2 starts bisection 2025-05-30 01:11:44.245413874 +0000 UTC m=+119894.373290787 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 714d749da96bc530f5d9a2cc24d000593f18412146c317ef1cf837ce15b74154 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 7e6dc9fa962029f3981a6ac1eb7b277d8ae7788794de914acf5ccd45d29b8e1b 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 0cd9e7040f348b9f099708fa85e3fed39bd30a506250e9aa96c53ea8df22e4a9 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 [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 5eb6d591e4215c488bbf3e81a5b77b22a1d13a9f912878f84de65ecec0593f0a 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f59f7a05b9617fd3d9fc4f788ab6d198d1c16b731521e5b68d8960104c4c9938 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 1b6494d8c76c4829c8876b3ffda7870918e4fd8b8e9927daba4bdc050b468b16 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 44db4837f75e09037bdef33d1b9d78100d41e2b7 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD db710ea87c32d5f806ffaaccbf98ecd3108314e4 testing commit db710ea87c32d5f806ffaaccbf98ecd3108314e4 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 843038cf867e4c339a02835c1b6789fcf6c8359401c56821fab1899c174a9212 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: 2h30m48.005943915s (build: 1h54m51.843398809s, test: 31m28.757404332s) crash still not fixed or there were kernel test errors commit msg: BACKPORT: mm: avoid unconditional one-tick sleep when swapcache_prepare fails 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:1933! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 462 Comm: syz.2.16 Not tainted 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:mb_mark_used+0x46f/0x480 fs/ext4/mballoc.c:1933 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:ffffc90000953b70 EFLAGS: 00010207 RAX: 0000000080000000 RBX: ffffc90000953cb8 RCX: ffff88811b8fe800 RDX: 000000000000000c RSI: ffffffff80000000 RDI: 0000000000008000 RBP: ffffc90000953b98 R08: 0000000000000001 R09: 0000000000007fff R10: 0000000000008001 R11: 0000000000000000 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: ffffc90000953c20 R15: 000000000000000c FS: 00007f7746d936c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 00000001125ae000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_trim_extent fs/ext4/mballoc.c:6446 [inline] ext4_try_to_trim_range+0x268/0x580 fs/ext4/mballoc.c:6506 ext4_trim_all_free fs/ext4/mballoc.c:6568 [inline] ext4_trim_fs+0x366/0x500 fs/ext4/mballoc.c:6659 __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: 0033:0x7f7745f8d169 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:00007f7746d93038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f77461a5fa0 RCX: 00007f7745f8d169 RDX: 0000400000000b40 RSI: 00000000c0185879 RDI: 0000000000000006 RBP: 00007f774600e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f77461a5fa0 R15: 00007ffe5f70a238 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mb_mark_used+0x46f/0x480 fs/ext4/mballoc.c:1933 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:ffffc90000953b70 EFLAGS: 00010207 RAX: 0000000080000000 RBX: ffffc90000953cb8 RCX: ffff88811b8fe800 RDX: 000000000000000c RSI: ffffffff80000000 RDI: 0000000000008000 RBP: ffffc90000953b98 R08: 0000000000000001 R09: 0000000000007fff R10: 0000000000008001 R11: 0000000000000000 R12: 000000007ffffff4 R13: 000000007ffffff4 R14: ffffc90000953c20 R15: 000000000000000c FS: 00007f7746d936c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000015000 CR3: 00000001125ae000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400