ci2 starts bisection 2026-03-22 10:17:17.127653554 +0000 UTC m=+111323.011326604
bisecting fixing commit since 911f602c2237b4e5cad1e1f53bfcf6190a37a764
building syzkaller on 0abd06914a0618dff2f4b80e8d3c0bfb50121eb1
ensuring issue is reproducible on original commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764

testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 72ccfce2e256835952a2f2250a8f1f259915bd2bb77b6b903ffab40bbc9acb8f
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 93b0f7b6ffa637849a0f6c151f685a98950aed3dd07d186a2585d07fe41f730e
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
the bug reproduces without the instrumentation
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
kconfig minimization: base=4788 full=6026 leaves diff=248
split chunks (needed=false): <248>
split chunk #0 of len 248 into 5 parts
testing without sub-chunk 1/5
disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b683c64e3b2f217b27fdc1503fc76ea64bf35e32a33357c41cc4ac9795f8f311
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 5d5b85587bfd386d09b27179315a6a15c7b52b2a85939f58c4928f2899341c9b
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: cb534d093c0289b1c47b1d3a00c34b7996c4d327fad0e91f40ebd2aa35ca4f47
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: d5281e590c255f1531778eef0b4631fc9c2e4a444b2ab358228133474ecebefa
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed
testing commit 911f602c2237b4e5cad1e1f53bfcf6190a37a764 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
failed building 911f602c2237b4e5cad1e1f53bfcf6190a37a764: net/socket.c:1128:(.text+0x837): undefined reference to `wext_handle_ioctl'
net/socket.c:3397:(.text+0xa28): undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:346:(.text+0x109): undefined reference to `wext_proc_exit'
net/core/net-procfs.c:330:(.text+0x1e4): undefined reference to `wext_proc_init'
minimized to 48 configs; suspects: [HID_ZEROPLUS 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 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 USB_XHCI_PCI_RENESAS 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 ZEROPLUS_FF]
disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing current HEAD 9136079e403ad15ed26ea110e148d3555a295f84
testing commit 9136079e403ad15ed26ea110e148d3555a295f84 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f15a63cbf43b2c0b069fb7a402cc96fc0637e9d5db656d5c7fd715e2bc1cc6fa
all runs: crashed: kernel BUG in mark_buffer_dirty_inode
representative crash: kernel BUG in mark_buffer_dirty_inode, types: [BUG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 1h10m40.163887661s (build: 17m14.425014927s, test: 48m18.667534574s)
crash still not fixed or there were kernel test errors
commit msg: Revert "rpmsg: core: fix race in driver_override_show() and use core helper"
crash: kernel BUG in mark_buffer_dirty_inode
------------[ cut here ]------------
kernel BUG at fs/buffer.c:581!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 504 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:mark_buffer_dirty_inode+0xe1/0xf0 fs/buffer.c:581
Code: b0 00 00 00 4c 89 7b 48 48 89 4b 50 4c 89 31 4c 89 6b 58 4c 89 e7 e8 6e 3f a1 00 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 90 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 55 49
RSP: 0018:ffffc90000733bc8 EFLAGS: 00010206
RAX: ffff888108df2a90 RBX: ffff88810e118068 RCX: ffff88810e1b0708
RDX: ffffea00046a1487 RSI: ffff88810e1b0708 RDI: ffff88810ee94a00
RBP: ffffc90000733bf8 R08: ffff88810e118068 R09: ffff8881141e2bf8
R10: 0000000000000004 R11: 0000000000000000 R12: ffff888108cc3290
R13: ffff888108df2a90 R14: ffffffff825e9850 R15: 000000000000050c
FS:  0000555571b80500(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc5a5c2130 CR3: 000000011a917000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __ext4_handle_dirty_metadata+0x9c/0x1c0 fs/ext4/ext4_jbd2.c:362
 ext4_xattr_release_block+0x1fb/0x2d0 fs/ext4/xattr.c:1292
 ext4_xattr_delete_inode+0x2ce/0x430 fs/ext4/xattr.c:2934
 ext4_evict_inode+0x325/0x750 fs/ext4/inode.c:300
 evict+0x11a/0x300 fs/inode.c:612
 iput_final fs/inode.c:1736 [inline]
 iput.part.0+0x17a/0x1d0 fs/inode.c:1762
 iput+0x17/0x20 fs/inode.c:1749
 dentry_unlink_inode+0xc5/0x110 fs/dcache.c:378
 __dentry_kill+0xea/0x180 fs/dcache.c:583
 dentry_kill fs/dcache.c:721 [inline]
 dput+0x14b/0x390 fs/dcache.c:883
 __fput+0x112/0x230 fs/file_table.c:294
 ____fput+0x9/0x10 fs/file_table.c:314
 task_work_run+0x5c/0x90 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x150/0x160 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:274
 do_syscall_64+0x3f/0x50 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f0f64916539
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff2904caa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fff2904cb90 RCX: 00007f0f64916539
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000000aa20 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31620000 R11: 0000000000000246 R12: 00007fff2904cbd0
R13: 00007f0f64b81fac R14: 000000000000aaab R15: 00007f0f64b81fa0
Modules linked in:
---[ end trace d8fa0c39aecdc7c9 ]---
RIP: 0010:mark_buffer_dirty_inode+0xe1/0xf0 fs/buffer.c:581
Code: b0 00 00 00 4c 89 7b 48 48 89 4b 50 4c 89 31 4c 89 6b 58 4c 89 e7 e8 6e 3f a1 00 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 90 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 41 55 49
RSP: 0018:ffffc90000733bc8 EFLAGS: 00010206

RAX: ffff888108df2a90 RBX: ffff88810e118068 RCX: ffff88810e1b0708