ci2 starts bisection 2025-03-08 07:52:06.760809307 +0000 UTC m=+64980.448336668
bisecting fixing commit since 5d96939590c0122be2138255c921e57e3f78b7bd
building syzkaller on fdb4c10ce6d49163d1f57463d7ca0ae22b71e765
ensuring issue is reproducible on original commit 5d96939590c0122be2138255c921e57e3f78b7bd

testing commit 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 36431ffcc0b38b01d069fd2fd7b6ea03b79b43984d45f11775f5241213953c65
run #0: crashed: kernel BUG in ext4_write_inline_data
run #1: crashed: kernel BUG in ext4_write_inline_data
run #2: crashed: kernel BUG in ext4_write_inline_data
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_write_inline_data
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_write_inline_data
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
run #10: crashed: kernel BUG in ext4_writepages
run #11: crashed: kernel BUG in ext4_write_inline_data
run #12: crashed: kernel BUG in ext4_write_inline_data
run #13: crashed: kernel BUG in ext4_writepages
run #14: crashed: kernel BUG in ext4_writepages
run #15: crashed: kernel BUG in ext4_write_inline_data
run #16: crashed: kernel BUG in ext4_writepages
run #17: crashed: kernel BUG in ext4_writepages
run #18: crashed: kernel BUG in ext4_writepages
run #19: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_write_inline_data, 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 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0dad437362421aae3c58ecb4f55aa82d41da110593d2b205561cc61465b5d733
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_write_inline_data
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_write_inline_data
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, 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=4920 full=6158 leaves diff=242
split chunks (needed=false): <242>
split chunk #0 of len 242 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 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6f8f1c4f32f6fd9610ba34e59387a4260298064ce24e874f8231225a10158c70
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_write_inline_data
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: be8851374adb299a7b5a86168ec48b8ee5384053a6bc5fe109ecd604734752a9
run #0: crashed: kernel BUG in ext4_write_inline_data
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_write_inline_data, 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 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 40cc14ba86b6bc35835c431de287046b56b6785149736f036fc1808d835e3dfe
run #0: crashed: kernel BUG in ext4_write_inline_data
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_write_inline_data
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_write_inline_data, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 703da9fdaa490fc71ed20483b485b5415d8b4dfdcbac99949ab57d436cfcc623
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_write_inline_data
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_write_inline_data
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_write_inline_data
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 5d96939590c0122be2138255c921e57e3f78b7bd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
failed building 5d96939590c0122be2138255c921e57e3f78b7bd: net/socket.c:1191: undefined reference to `wext_handle_ioctl'
net/socket.c:3385: 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 46 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 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 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 LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing current HEAD 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d
testing commit 7d1f9b5c2ff516f9c97fffe9613799b29ef4946d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3d2ec3e651da9ddcdb7e91524866cda5e109e9df053ef1afe9b80c1fdf7ec987
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in ext4_writepages
run #3: crashed: kernel BUG in ext4_writepages
run #4: crashed: kernel BUG in ext4_write_inline_data
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in ext4_writepages
run #7: crashed: kernel BUG in ext4_writepages
run #8: crashed: kernel BUG in ext4_writepages
run #9: crashed: kernel BUG in ext4_write_inline_data
representative crash: kernel BUG in ext4_writepages, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 52m29.707521447s (build: 24m20.194644074s, test: 24m32.179595213s)
crash still not fixed or there were kernel test errors
commit msg: Merge branch 'android13-5.15' into android13-5.15-lts
crash: kernel BUG in ext4_writepages
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2745!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 51 Comm: kworker/u4:2 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_writepages+0xee2/0x11a0 fs/ext4/inode.c:2745
Code: 8b 16 89 85 ac fe ff ff e9 e3 f5 ff ff 8b 85 78 fe ff ff 45 31 ff 4c 8b ad 90 fe ff ff 89 85 ac fe ff ff e9 59 fd ff ff 0f 0b <0f> 0b 89 85 ac fe ff ff e9 9a f4 ff ff 48 8d bd 50 ff ff ff e8 45
RSP: 0018:ffffc9000024b9b8 EFLAGS: 00010203
RAX: 000000c410000000 RBX: ffff888108e363a8 RCX: 0000000000000001
RDX: ffff8881069d8000 RSI: 0000000000000ab4 RDI: 0000000000000000
RBP: ffffc9000024bb78 R08: 0000000000000000 R09: ffffffff8144c7cf
R10: ffffffffffffffff R11: 0000000000000018 R12: ffff88811090f000
R13: ffff888108e36218 R14: ffffc9000024bcb0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcbc493fe8 CR3: 00000001133fd000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0xc5/0x200 mm/page-writeback.c:2388
 __writeback_single_inode+0x3f/0x310 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x21b/0x500 fs/fs-writeback.c:1930
 wb_writeback+0x5e/0x2b0 fs/fs-writeback.c:2106
 wb_do_writeback fs/fs-writeback.c:2253 [inline]
 wb_workfn+0xe6/0x510 fs/fs-writeback.c:2294
 process_one_work+0x1aa/0x380 kernel/workqueue.c:2325
 worker_thread+0x51/0x3c0 kernel/workqueue.c:2472
 kthread+0x142/0x170 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 2245b07918d834cb ]---
RIP: 0010:ext4_writepages+0xee2/0x11a0 fs/ext4/inode.c:2745
Code: 8b 16 89 85 ac fe ff ff e9 e3 f5 ff ff 8b 85 78 fe ff ff 45 31 ff 4c 8b ad 90 fe ff ff 89 85 ac fe ff ff e9 59 fd ff ff 0f 0b <0f> 0b 89 85 ac fe ff ff e9 9a f4 ff ff 48 8d bd 50 ff ff ff e8 45
RSP: 0018:ffffc9000024b9b8 EFLAGS: 00010203
RAX: 000000c410000000 RBX: ffff888108e363a8 RCX: 0000000000000001
RDX: ffff8881069d8000 RSI: 0000000000000ab4 RDI: 0000000000000000
RBP: ffffc9000024bb78 R08: 0000000000000000 R09: ffffffff8144c7cf
R10: ffffffffffffffff R11: 0000000000000018 R12: ffff88811090f000
R13: ffff888108e36218 R14: ffffc9000024bcb0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faffb00ded8 CR3: 00000001023e6000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400