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Yue Haibing 7f1cad84ac atm: clip: Fix NULL pointer dereference in vcc_sendmsg() ... [ Upstream commit 22fc46cea9 ] atmarpd_dev_ops does not implement the send method, which may cause crash as bellow. BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.15.0-rc6-syzkaller-00346-g5723cc3450bc #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc9000d3cf778 EFLAGS: 00010246 RAX: 1ffffffff1910dd1 RBX: 00000000000000c0 RCX: dffffc0000000000 RDX: ffffc9000dc82000 RSI: ffff88803e4c4640 RDI: ffff888052cd0000 RBP: ffffc9000d3cf8d0 R08: ffff888052c9143f R09: 1ffff1100a592287 R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff92001a79f00 R13: ffff888052cd0000 R14: ffff88803e4c4640 R15: ffffffff8c886e88 FS: 00007fbc762566c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000041f1b000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> vcc_sendmsg+0xa10/0xc50 net/atm/common.c:644 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 ____sys_sendmsg+0x52d/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmmsg+0x227/0x430 net/socket.c:2709 __do_sys_sendmmsg net/socket.c:2736 [inline] __se_sys_sendmmsg net/socket.c:2733 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2733 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 1da177e4c3 ("Linux-2.6.12-rc2") Reported-by: syzbot+e34e5e6b5eddb0014def@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/682f82d5.a70a0220.1765ec.0143.GAE@google.com/T Signed-off-by: Yue Haibing <yuehaibing@huawei.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Link: https://patch.msgid.link/20250705085228.329202-1-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2025-07-17 18:30:47 +02:00
..
addr.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
addr.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
atm_misc.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
atm_sysfs.c	net: atm: use DEVICE_ATTR_RO macro	2021-05-20 15:50:54 -07:00
br2684.c	atm: [br2864] fix spelling mistakes	2021-06-07 13:17:37 -07:00
clip.c	atm: clip: Fix NULL pointer dereference in vcc_sendmsg()	2025-07-17 18:30:47 +02:00
common.c	atm: Revert atm_account_tx() if copy_from_iter_full() fails.	2025-06-27 11:05:34 +01:00
common.h	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00
ioctl.c	atm: Fix Use-After-Free in do_vcc_ioctl	2023-12-20 15:17:35 +01:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
lec.c	net: atm: fix /proc/net/atm/lec handling	2025-06-27 11:05:36 +01:00
lec.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
lec_arpc.h	net: atm: lec_arpc.h: delete duplicated word	2020-07-19 18:14:21 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mpc.c	atm: Fix NULL pointer dereference	2025-04-10 14:31:55 +02:00
mpc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mpoa_caches.c	mm, treewide: rename kzfree() to kfree_sensitive()	2020-08-07 11:33:22 -07:00
mpoa_caches.h	atm: mpoa: remove 32-bit timekeeping	2017-11-30 09:26:32 -05:00
mpoa_proc.c	net/atm: fix proc_mpc_write incorrect return value	2022-10-29 10:12:55 +02:00
pppoatm.c	net: atm: pppoatm: use new API for wakeup tasklet	2021-01-29 18:24:05 -08:00
proc.c	proc: convert everything to "struct proc_ops"	2020-02-04 03:05:26 +00:00
protocols.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
pvc.c	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00
raw.c	atm: Revert atm_account_tx() if copy_from_iter_full() fails.	2025-06-27 11:05:34 +01:00
resources.c	atm: Release atm_dev_mutex after removing procfs in atm_dev_deregister().	2025-07-10 15:57:39 +02:00
resources.h	atm: lift copyin from atm_dev_ioctl()	2020-05-20 20:31:35 -04:00
signaling.c	net: atm: delete duplicated words	2020-09-18 14:12:43 -07:00
signaling.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
svc.c	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00