ci2 starts bisection 2024-01-21 21:23:57.8444247 +0000 UTC m=+195939.379861339
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: 727a68fff916f0ee50629ae798a00e39de4359057dcc2ad68142030ef850a31c
run #0: crashed: kernel BUG in ext4_writepages
run #1: crashed: kernel BUG in ext4_writepages
run #2: crashed: kernel BUG in __ext4_journal_stop
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
run #10: crashed: kernel BUG in ext4_writepages
run #11: crashed: kernel BUG in ext4_writepages
run #12: crashed: kernel BUG in ext4_writepages
run #13: crashed: kernel BUG in ext4_writepages
run #14: crashed: kernel BUG in ext4_writepages
run #15: crashed: kernel BUG in ext4_writepages
run #16: crashed: kernel BUG in __ext4_journal_stop
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_writepages, 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 b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: da0dce5eac1e5a94d7e5fe3ba7be091aa1e6481bc253d4d56a8e3cc4c860abc9
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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], 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: cadd09c7877265fd6bfeef712d7ae16e16c9a00ef088409f04c08a0998faa830
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 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: 9b97c9460a7df6c5e1b0c6cd05ba11cc0abe6bf5838f1155cda46483c9aec82a
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_journal_stop
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 3/5
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: 0057182ea80b0e260e341971092f101dff8059e18bb821b5e3f102a0c2bb2ecd
run #0: crashed: kernel BUG in __ext4_journal_stop
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_journal_stop, 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 b0c06048a8ff95e4599e761714866deb6f3f9e0f gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e5d7d1d989793a793119175a0de6e2b73ae8b9abbcb1ef6adcf860a05b870ce3
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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], 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 [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing current HEAD aba5a3fe094e43a7aa8adc5c09a131ef8c9ccfde
testing commit aba5a3fe094e43a7aa8adc5c09a131ef8c9ccfde gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 82bd3c890fae5d9aa9998d8056138b6615a1e9aaeedc92b02c4842d8e98f6a81
all runs: crashed: kernel BUG in ext4_writepages
representative crash: kernel BUG in ext4_writepages, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 48m34.156013883s (build: 23m17.304039815s, test: 22m27.086631123s)
crash still not fixed or there were kernel test errors
commit msg: ANDROID: Enable CONFIG_LAZY_RCU in x86 gki_defconfig
crash: kernel BUG in ext4_writepages
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2737!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 566 Comm: kworker/u4:6 Not tainted 6.1.57-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:ext4_writepages+0x110a/0x1110 fs/ext4/inode.c:2736
Code: fe ff ff 89 d9 e8 d6 35 02 00 65 ff 0d 77 ad b4 7e 4c 8b b5 a8 fe ff ff 0f 85 6e fe ff ff e8 d5 2d 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:ffffc90000ccb920 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000aab RDI: 0000000000000000
RBP: ffffc90000ccbaf8 R08: 0000000000000000 R09: ffffffff814cf1b6
R10: 0000000000000080 R11: 0000000000000aab R12: ffffc90000ccbc48
R13: ffffc90000ccbb08 R14: ffff888116592000 R15: ffff88810c3c2628
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff4ef7bfa8 CR3: 00000001142fa000 CR4: 00000000003506a0
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 d6 35 02 00 65 ff 0d 77 ad b4 7e 4c 8b b5 a8 fe ff ff 0f 85 6e fe ff ff e8 d5 2d 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:ffffc90000ccb920 EFLAGS: 00010207

RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000aab RDI: 0000000000000000
RBP: ffffc90000ccbaf8 R08: 0000000000000000 R09: ffffffff814cf1b6
R10: 0000000000000080 R11: 0000000000000aab R12: ffffc90000ccbc48
R13: ffffc90000ccbb08 R14: ffff888116592000 R15: ffff88810c3c2628
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f8c99d988 CR3: 0000000116b65000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400