ci2 starts bisection 2025-05-14 10:29:40.554619394 +0000 UTC m=+72565.920496109
bisecting fixing commit since ccc915784332a8717d3fef84283c416c0e57d3d6
building syzkaller on 40a34ec944732a2502ee67d92cc8c023355dfad4
ensuring issue is reproducible on original commit ccc915784332a8717d3fef84283c416c0e57d3d6

testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: c22508bf3c2f8fdad57843bf9e9b5ff9dede41bc3366a3a5ed9dd17f0bd18004
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: 1866307fc92d7a6c56aace08729c87da2f8654a17a4dd5802341f7ae0afbc1a7
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, types: [BUG]
the bug reproduces without the instrumentation
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
kconfig minimization: base=5185 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: 03128b5e24aff4675a7161f4d5d73aaa15a2d4f94dbaf6f4b171b84526591f50
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: e3ca4f12aeed9aa4014e066a4d2ad68c5d15b9a6936065ce156fd5f0b228f821
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: 0f5fc05f0f08ee2c337412312325f6d625973a16d79d7f75c8790b0ac43881a3
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, 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 ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: 248d2cdcdaa7cd405965f13ced8d1329e57475993ac8fbfaed554f727c722906
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, 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 ccc915784332a8717d3fef84283c416c0e57d3d6 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
failed building ccc915784332a8717d3fef84283c416c0e57d3d6: 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 53b26534cce792bd8a1040c0dcddd31a34194ab0
testing commit 53b26534cce792bd8a1040c0dcddd31a34194ab0 gcc
compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
kernel signature: 5aa0a4c2df24f10798cfaf54fc8c061f7f4a6855a041eb0c4a3c93e94d9d40ec
all runs: crashed: kernel BUG in ext4_mb_release_inode_pa
representative crash: kernel BUG in ext4_mb_release_inode_pa, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 2h6m47.364669207s (build: 1h25m46.305000357s, test: 37m33.563671095s)
crash still not fixed or there were kernel test errors
commit msg: UPSTREAM: usb-storage: Optimize scan delay more precisely
crash: kernel BUG in ext4_mb_release_inode_pa
EXT4-fs error (device loop0): ext4_mb_release_inode_pa:4881: group 0, 
free 7, pa_free 16
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4854!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 518 Comm: syz.0.16 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:ext4_mb_release_inode_pa+0x2b4/0x2c0 fs/ext4/mballoc.c:4854
Code: b8 78 04 00 00 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 0f 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7e 4e b8 00 0f 0b <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000b1b650 EFLAGS: 00010206
RAX: 00000000000000a0 RBX: ffff888114843000 RCX: 0000000001004343
RDX: 00000000000000a0 RSI: 00000000000000ff RDI: ffff8881100d3800
RBP: ffffc90000b1b6b0 R08: ffffc90000b1b67c R09: ffffc90000b1b678
R10: 20656572665f6170 R11: 202c372065657266 R12: ffff88811c024750
R13: 00000000000000a0 R14: 0000000000000000 R15: ffffc90000b1b6f0
FS:  00007fc0368046c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7af9d9f98 CR3: 000000011e7e7000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_discard_group_preallocations+0x377/0x450 fs/ext4/mballoc.c:5000
 ext4_mb_discard_preallocations fs/ext4/mballoc.c:5569 [inline]
 ext4_mb_discard_preallocations_should_retry+0x8e/0x1b0 fs/ext4/mballoc.c:5590
 ext4_mb_new_blocks+0xc3d/0xdc0 fs/ext4/mballoc.c:5793
 ext4_alloc_branch fs/ext4/indirect.c:340 [inline]
 ext4_ind_map_blocks+0x788/0xc10 fs/ext4/indirect.c:635
 ext4_map_blocks+0x2d6/0x660 fs/ext4/inode.c:680
 _ext4_get_block+0x8d/0x140 fs/ext4/inode.c:821
 ext4_get_block+0x12/0x20 fs/ext4/inode.c:838
 ext4_block_write_begin+0x1a3/0x540 fs/ext4/inode.c:1123
 ext4_write_begin+0x20a/0x640 fs/ext4/inode.c:-1
 ext4_da_write_begin+0x228/0x2d0 fs/ext4/inode.c:3000
 generic_perform_write+0x9e/0x270 mm/filemap.c:3881
 ext4_buffered_write_iter+0xe0/0x180 fs/ext4/file.c:285
 ext4_file_write_iter+0x2c3/0x650 fs/ext4/file.c:-1
 call_write_iter include/linux/fs.h:2274 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x346/0x430 fs/read_write.c:584
 ksys_write+0x6e/0xe0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x16/0x20 fs/read_write.c:646
 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
 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: 0033:0x7fc03598cde9
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:00007fc036804038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc035ba5fa0 RCX: 00007fc03598cde9
RDX: 0000000000043451 RSI: 0000400000000200 RDI: 0000000000000007
RBP: 00007fc035a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc035ba5fa0 R15: 00007ffeaf4c3598
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_release_inode_pa+0x2b4/0x2c0 fs/ext4/mballoc.c:4854
Code: b8 78 04 00 00 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 0f 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7e 4e b8 00 0f 0b <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000b1b650 EFLAGS: 00010206
RAX: 00000000000000a0 RBX: ffff888114843000 RCX: 0000000001004343
RDX: 00000000000000a0 RSI: 00000000000000ff RDI: ffff8881100d3800
RBP: ffffc90000b1b6b0 R08: ffffc90000b1b67c R09: ffffc90000b1b678
R10: 20656572665f6170 R11: 202c372065657266 R12: ffff88811c024750
R13: 00000000000000a0 R14: 0000000000000000 R15: ffffc90000b1b6f0
FS:  00007fc0368046c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7af9d9f98 CR3: 000000011e7e7000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400