ci2 starts bisection 2023-11-24 17:54:50.075909935 +0000 UTC m=+87514.876502519
bisecting fixing commit since b0c06048a8ff95e4599e761714866deb6f3f9e0f
building syzkaller on da3c3ef8d98b7ba08828daa5b40f59b2dbc0ceaf
ensuring issue is reproducible on original commit b0c06048a8ff95e4599e761714866deb6f3f9e0f

testing commit b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: ccb813e530340ecc4cdba1d747561902d9123291075d890853ac6aad3ecce6b8
all runs: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2223a330b45f59281fbcdd0cf97a0bcfd802fc8de0443939c30d8ced5a279e65
all runs: 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=5179 full=6487 leaves diff=250
split chunks (needed=false): <250>
split chunk #0 of len 250 into 5 parts
testing without sub-chunk 1/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: dd92280309af84c0523dfd5d556c23cdf694d975b4e0d72026165d4332e92590
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_writepages
run #5: crashed: kernel BUG in ext4_writepages
run #6: crashed: kernel BUG in __ext4_journal_stop
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 b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5c272e4a330c8d440cb21504cd47b106d7e7b0938dbc2170826199cab7c3edf2
all runs: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e655a246ac15e268301ae8e9a572dbc636671fcf4533e0b73643c363fe204533
all runs: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, 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 b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4d7a2d025281c5e7d0163a32abe4abe666a15be234a6c68691366b494cbf1892
all runs: 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed
testing commit b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
failed building b0c06048a8ff95e4599e761714866deb6f3f9e0f: net/socket.c:1225: undefined reference to `wext_handle_ioctl'
net/socket.c:3420: undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:329: undefined reference to `wext_proc_init'
net/core/net-procfs.c:345: undefined reference to `wext_proc_exit'
minimized to 50 configs; suspects: [HID_ZEROPLUS 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_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_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 95307ec5c864e39b7e1ad26eff3e98b06850b4d3
testing commit 95307ec5c864e39b7e1ad26eff3e98b06850b4d3 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a322c707424e32f36eed9d2d9a82d7c5a7840b3e3bd98e73f259494670c39e96
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_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: OK
representative crash: kernel BUG in ext4_writepages, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 45m39.498418896s (build: 19m46.667152057s, test: 22m46.450352149s)
crash still not fixed or there were kernel test errors
commit msg: FROMLIST: iommu: Avoid more races around device probe
crash: kernel BUG in ext4_writepages
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2737!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 406 Comm: kworker/u4:4 Not tainted 6.1.43-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Workqueue: writeback wb_workfn (flush-7:3)
RIP: 0010:ext4_writepages+0x110a/0x1110 fs/ext4/inode.c:2736
Code: fe ff ff 89 d9 e8 36 34 02 00 65 ff 0d 27 dd b4 7e 4c 8b b5 a8 fe ff ff 0f 85 6e fe ff ff e8 85 5d b3 ff e9 64 fe ff ff 0f 0b <0f> 0b 0f 1f 40 00 55 48 89 e5 48 83 7e 28 00 74 0c f0 80 4e 01 04
RSP: 0018:ffffc90000897920 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000aab RDI: 0000000000000000
RBP: ffffc90000897af8 R08: 0000000000000000 R09: ffffffff814cc206
R10: 0000000000000080 R11: 0000000000000aab R12: ffffc90000897c48
R13: ffffc90000897b08 R14: ffff8881165e8000 R15: ffff88810d951128
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00123e000 CR3: 0000000116aca000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0xcc/0x210 mm/page-writeback.c:2472
 __writeback_single_inode+0x43/0x350 fs/fs-writeback.c:1590
 writeback_sb_inodes+0x3e2/0x6f0 fs/fs-writeback.c:1881
 wb_writeback+0x17c/0x390 fs/fs-writeback.c:2055
 wb_do_writeback fs/fs-writeback.c:2198 [inline]
 wb_workfn+0x106/0x4b0 fs/fs-writeback.c:2238
 process_one_work+0x1c5/0x380 kernel/workqueue.c:2299
 worker_thread+0x249/0x400 kernel/workqueue.c:2446
 kthread+0xe6/0x100 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x110a/0x1110 fs/ext4/inode.c:2736
Code: fe ff ff 89 d9 e8 36 34 02 00 65 ff 0d 27 dd b4 7e 4c 8b b5 a8 fe ff ff 0f 85 6e fe ff ff e8 85 5d b3 ff e9 64 fe ff ff 0f 0b <0f> 0b 0f 1f 40 00 55 48 89 e5 48 83 7e 28 00 74 0c f0 80 4e 01 04
RSP: 0018:ffffc90000897920 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000aab RDI: 0000000000000000
RBP: ffffc90000897af8 R08: 0000000000000000 R09: ffffffff814cc206
R10: 0000000000000080 R11: 0000000000000aab R12: ffffc90000897c48
R13: ffffc90000897b08 R14: ffff8881165e8000 R15: ffff88810d951128
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020004402 CR3: 00000001168ae000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400