syzbot


SYZFAIL: netlink_send_ext: short netlink write (2)

Status: premoderation: reported on 2025/03/07 08:36
Reported-by: syzbot+5a427843aa13a144b1c9@syzkaller.appspotmail.com
First crash: 140d, last: 75d
Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 SYZFAIL: netlink_send_ext: short netlink write -1 syz error 29 1408d 1614d 0/1 upstream: reported syz repro on 2021/02/22 17:18
android-6-1 SYZFAIL: netlink_send_ext: short netlink write -1 1 254d 254d 0/2 auto-obsoleted due to no activity on 2025/02/11 23:46
android-5-10 SYZFAIL: netlink_send_ext: short netlink write -1 4 287d 376d 0/2 auto-obsoleted due to no activity on 2025/01/09 14:03
android-54 SYZFAIL: netlink_send_ext: short netlink write -1 syz 15 74d 1614d 0/2 upstream: reported syz repro on 2021/02/22 10:25
linux-4.14 SYZFAIL: netlink_send_ext: short netlink write -1 syz error 40 1211d 1615d 0/1 upstream: reported syz repro on 2021/02/21 20:56
android-5-15 SYZFAIL: netlink_send_ext: short netlink write -1 16 98d 374d 0/2 auto-obsoleted due to no activity on 2025/07/18 02:45

Sample crash report:
May 11 13:06:54 syzkaller kern.notice kernel: [  314.294634][   T24] audit: type=1400 audit(1746968814.064:5944): avc:  denied  { read write } for  pid=7091 comm="syz.3.1777" name="fuse" dev="devtmpfs" ino=90 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_d
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=44 (errno 13: Permission denied)
loop exited with status 67
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: mmap of data segment failed
want 0x200000000000, got 0xffffffffffffffff (errno 13: Permission denied)
SYZFAIL: repeatedly failed to execute the program
proc=2 req=1704 state=1 status=67 (errno 9: Bad file descriptor)

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/11 13:07 android13-5.10-lts 7e2543346ff7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: netlink_send_ext: short netlink write
2025/03/07 08:35 android13-5.10-lts 3f5f2283d684 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: netlink_send_ext: short netlink write
* Struck through repros no longer work on HEAD.