ci2 starts bisection 2025-06-02 05:42:52.555442659 +0000 UTC m=+395362.683319552 bisecting fixing commit since 1ac09f5c057146455dc10fccd52a8f5f34039fb0 building syzkaller on ef44b750e8fab8d6d5cb84920680581b13e0d470 ensuring issue is reproducible on original commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3958796536805221549071bdae983832a34cc4d1cb9bb0f7bb509c6f7027a139 all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, 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 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 567b0b07c9d150f6d7ecbc67bceb283b4da00b0706ba9165dd6516da1747da97 all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, 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=6548 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 [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 620d2d81158375a5fd9e4c53c16cf34862d51d4a166839039433eecda6ea2b81 all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, types: [BUG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 53ebd904157a8e6768c723865f24569b2b710db0eb4cd843f92bfa853fba980b all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, types: [BUG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3ae8816400fde806e66e5c0f2423b6bab3336ea230a0f56cd862b13d966748f4 all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, types: [BUG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 63f44c803915a1a75ab81d884520ede47f540da25f43eb87692719825d30742c all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, types: [BUG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 1ac09f5c057146455dc10fccd52a8f5f34039fb0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 failed building 1ac09f5c057146455dc10fccd52a8f5f34039fb0: 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], 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: 535ca8f7fd75c98fc093342f3ff1b6136ac1c13b6aec8b383b1bb565078e24e3 all runs: crashed: kernel BUG in ext4_inline_data_truncate representative crash: kernel BUG in ext4_inline_data_truncate, types: [BUG] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h15m14.477350777s (build: 34m39.860411281s, test: 25m28.927105397s) 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 ext4_inline_data_truncate ------------[ cut here ]------------ kernel BUG at fs/ext4/inline.c:2005! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 465 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:ext4_inline_data_truncate+0x403/0x410 fs/ext4/inline.c:2005 Code: 89 f7 48 89 de e8 dd e3 04 00 85 c0 0f 84 51 fe ff ff 41 89 c5 e9 8d fe ff ff 41 bd f4 ff ff ff e9 36 fe ff ff e8 4d 8e b9 00 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900008fbba0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88810c26a0e8 RCX: 0000000000000108 RDX: ffffc900008fbbd8 RSI: ffffc900008fbbb8 RDI: ffff88810c26a0e8 RBP: ffffc900008fbc48 R08: 0000000000000100 R09: 0000000000000080 R10: 0000000000000001 R11: 0000000000000080 R12: 0000000000000078 R13: ffff88810c269fd8 R14: 0000000000000002 R15: 0000000000000010 FS: 000055558da9e500(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f389142b000 CR3: 000000011ad56000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_truncate+0x13b/0x470 fs/ext4/inode.c:4247 ext4_evict_inode+0x558/0x750 fs/ext4/inode.c:286 evict+0x1a0/0x300 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x1be/0x280 fs/inode.c:1860 dentry_unlink_inode+0x108/0x110 fs/dcache.c:405 __dentry_kill+0x12e/0x200 fs/dcache.c:611 dentry_kill+0x64/0x110 fs/dcache.c:-1 dput+0x3d/0x60 fs/dcache.c:918 __fput+0x120/0x250 fs/file_table.c:328 ____fput+0x9/0x10 fs/file_table.c:348 task_work_run+0x90/0xb0 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8b38d8cde9 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:00007ffd9fe14ac8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f8b38fa7ba0 RCX: 00007f8b38d8cde9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f8b38fa7ba0 R08: 0000000000000000 R09: 000000099fe14dbf R10: 000000000003fd8c R11: 0000000000000246 R12: 000000000000c272 R13: 00007ffd9fe14bc0 R14: ffffffffffffffff R15: 00007ffd9fe14be0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_inline_data_truncate+0x403/0x410 fs/ext4/inline.c:2005 Code: 89 f7 48 89 de e8 dd e3 04 00 85 c0 0f 84 51 fe ff ff 41 89 c5 e9 8d fe ff ff 41 bd f4 ff ff ff e9 36 fe ff ff e8 4d 8e b9 00 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900008fbba0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88810c26a0e8 RCX: 0000000000000108 RDX: ffffc900008fbbd8 RSI: ffffc900008fbbb8 RDI: ffff88810c26a0e8 RBP: ffffc900008fbc48 R08: 0000000000000100 R09: 0000000000000080 R10: 0000000000000001 R11: 0000000000000080 R12: 0000000000000078 R13: ffff88810c269fd8 R14: 0000000000000002 R15: 0000000000000010 FS: 000055558da9e500(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000011ad56000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400