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Eric Dumazet 17d6c77470 sctp: initialize more fields in sctp_v6_from_sk() 
[ Upstream commit 2e87504692 ]

syzbot found that sin6_scope_id was not properly initialized,
leading to undefined behavior.

Clear sin6_scope_id and sin6_flowinfo.

BUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649
  __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649
  sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983
  sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390
  sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452
  sctp_get_port net/sctp/socket.c:8523 [inline]
  sctp_listen_start net/sctp/socket.c:8567 [inline]
  sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636
  __sys_listen_socket net/socket.c:1912 [inline]
  __sys_listen net/socket.c:1927 [inline]
  __do_sys_listen net/socket.c:1932 [inline]
  __se_sys_listen net/socket.c:1930 [inline]
  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930
  x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51
  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
  do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable addr.i.i created at:
  sctp_get_port net/sctp/socket.c:8515 [inline]
  sctp_listen_start net/sctp/socket.c:8567 [inline]
  sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636
  __sys_listen_socket net/socket.c:1912 [inline]
  __sys_listen net/socket.c:1927 [inline]
  __do_sys_listen net/socket.c:1932 [inline]
  __se_sys_listen net/socket.c:1930 [inline]
  __x64_sys_listen+0x343/0x4c0 net/socket.c:1930

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: syzbot+e69f06a0f30116c68056@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/68adc0a2.050a0220.37038e.00c4.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20250826141314.1802610-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-09-04 14:28:46 +02:00
arch powerpc/kvm: Fix ifdef to remove build warning 2025-09-04 14:28:45 +02:00
block block: avoid possible overflow for chunk_sectors check in blk_stack_limits() 2025-08-28 16:24:25 +02:00
certs
crypto
Documentation asm-generic: Add memory barrier dma_mb() 2025-08-28 16:24:36 +02:00
drivers net: stmmac: xgmac: Do not enable RX FIFO Overflow interrupts 2025-09-04 14:28:46 +02:00
fs udf: Fix directory iteration for longer tail extents 2025-09-04 14:28:44 +02:00
include atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control(). 2025-09-04 14:28:45 +02:00
init
io_uring
ipc
kernel ftrace: Fix potential warning in trace_printk_seq during ftrace_dump 2025-09-04 14:28:44 +02:00
lib
LICENSES
mm mm/page_alloc: detect allocation forbidden by cpuset and bail out early 2025-08-28 16:24:37 +02:00
net sctp: initialize more fields in sctp_v6_from_sk() 2025-09-04 14:28:46 +02:00
samples
scripts kconfig: lxdialog: fix 'space' to (de)select options 2025-08-28 16:24:25 +02:00
security
sound ASoC: codecs: tx-macro: correct tx_macro_component_drv name 2025-09-04 14:28:44 +02:00
tools selftests: mptcp: pm: check flush doesn't reset limits 2025-08-28 16:24:37 +02:00
usr
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.get_maintainer.ignore
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Makefile Linux 5.15.190 2025-08-28 16:24:39 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.