In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate payload size in ipc response
If installing malicious ksmbd-tools, ksmbd.mountd can return invalid ipc response to ksmbd kernel server. ksmbd should validate payload size of ipc response from ksmbd.mountd to avoid memory overrun or slab-out-of-bounds. This patch validate 3 ipc response that has payload.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in smb2isvalidoplockbreak()
Skip sessions that are being teared down (status == SESEXITING) to avoid UAF.
In the Linux kernel, the following vulnerability has been resolved:
In the Linux kernel, the following vulnerability has been resolved:
udp: do not accept non-tunnel GSO skbs landing in a tunnel
The Linux kernel CVE team has assigned CVE-2024-35884 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051946-CVE-2024-35884-d4a4@gregkh/T
In the Linux kernel, the following vulnerability has been resolved:
smb: client: guarantee refcounted children from parent session
Avoid potential use-after-free bugs when walking DFS referrals, mounting and performing DFS failover by ensuring that all children from parent @tcon->ses are also refcounted. They're all needed across the entire DFS mount. Get rid of @tcon->dfsseslist while we're at it, too.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in smb2isvalidleasebreak()
Skip sessions that are being teared down (status == SESEXITING) to avoid UAF.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix UAF in smb2reconnectserver()
The Linux kernel CVE team has assigned CVE-2024-35870 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051940-CVE-2024-35870-3c02@gregkh/T
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in isvalidoplockbreak()
Skip sessions that are being teared down (status == SESEXITING) to avoid UAF.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in cifssignalcifsdforreconnect()
Skip sessions that are being teared down (status == SESEXITING) to avoid UAF.
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix UAF in error path
Sam Page (sam4k) working with Trend Micro Zero Day Initiative reported a UAF in the tipcbufappend() error path:
BUG: KASAN: slab-use-after-free in kfreeskblistreason+0x47e/0x4c0 linux/net/core/skbuff.c:1183 Read of size 8 at addr ffff88804d2a7c80 by task poc/8034
CPU: 1 PID: 8034 Comm: poc Not tainted 6.8.2 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014 Call Trace: <IRQ> dumpstack linux/lib/dumpstack.c:88 dumpstacklvl+0xd9/0x1b0 linux/lib/dumpstack.c:106 printaddressdescription linux/mm/kasan/report.c:377 printreport+0xc4/0x620 linux/mm/kasan/report.c:488 kasanreport+0xda/0x110 linux/mm/kasan/report.c:601 kfreeskblistreason+0x47e/0x4c0 linux/net/core/skbuff.c:1183 skbreleasedata+0x5af/0x880 linux/net/core/skbuff.c:1026 skbreleaseall linux/net/core/skbuff.c:1094 kfreeskb linux/net/core/skbuff.c:1108 kfreeskbreason+0x12d/0x210 linux/net/core/skbuff.c:1144 kfreeskb linux/./include/linux/skbuff.h:1244 tipcbufappend+0x425/0xb50 linux/net/tipc/msg.c:186 tipclinkinput+0x224/0x7c0 linux/net/tipc/link.c:1324 tipclinkrcv+0x76e/0x2d70 linux/net/tipc/link.c:1824 tipcrcv+0x45f/0x10f0 linux/net/tipc/node.c:2159 tipcudprecv+0x73b/0x8f0 linux/net/tipc/udpmedia.c:390 udpqueuercvoneskb+0xad2/0x1850 linux/net/ipv4/udp.c:2108 udpqueuercvskb+0x131/0xb00 linux/net/ipv4/udp.c:2186 udpunicastrcvskb+0x165/0x3b0 linux/net/ipv4/udp.c:2346 udp4librcv+0x2594/0x3400 linux/net/ipv4/udp.c:2422 ipprotocoldeliverrcu+0x30c/0x4e0 linux/net/ipv4/ipinput.c:205 iplocaldeliverfinish+0x2e4/0x520 linux/net/ipv4/ipinput.c:233 NFHOOK linux/./include/linux/netfilter.h:314 NFHOOK linux/./include/linux/netfilter.h:308 iplocaldeliver+0x18e/0x1f0 linux/net/ipv4/ipinput.c:254 dstinput linux/./include/net/dst.h:461 iprcvfinish linux/net/ipv4/ipinput.c:449 NFHOOK linux/./include/linux/netfilter.h:314 NFHOOK linux/./include/linux/netfilter.h:308 iprcv+0x2c5/0x5d0 linux/net/ipv4/ipinput.c:569 netifreceiveskbonecore+0x199/0x1e0 linux/net/core/dev.c:5534 netifreceiveskb+0x1f/0x1c0 linux/net/core/dev.c:5648 processbacklog+0x101/0x6b0 linux/net/core/dev.c:5976 napipoll.constprop.0+0xba/0x550 linux/net/core/dev.c:6576 napipoll linux/net/core/dev.c:6645 netrxaction+0x95a/0xe90 linux/net/core/dev.c:6781 dosoftirq+0x21f/0x8e7 linux/kernel/softirq.c:553 dosoftirq linux/kernel/softirq.c:454 dosoftirq+0xb2/0xf0 linux/kernel/softirq.c:441 </IRQ> <TASK> localbhenableip+0x100/0x120 linux/kernel/softirq.c:381 localbhenable linux/./include/linux/bottomhalf.h:33 rcureadunlockbh linux/./include/linux/rcupdate.h:851 devqueuexmit+0x871/0x3ee0 linux/net/core/dev.c:4378 devqueuexmit linux/./include/linux/netdevice.h:3169 neighhhoutput linux/./include/net/neighbour.h:526 neighoutput linux/./include/net/neighbour.h:540 ipfinishoutput2+0x169f/0x2550 linux/net/ipv4/ipoutput.c:235 ipfinishoutput linux/net/ipv4/ipoutput.c:313 ipfinishoutput+0x49e/0x950 linux/net/ipv4/ipoutput.c:295 ipfinishoutput+0x31/0x310 linux/net/ipv4/ipoutput.c:323 NFHOOKCOND linux/./include/linux/netfilter.h:303 ipoutput+0x13b/0x2a0 linux/net/ipv4/ipoutput.c:433 dstoutput linux/./include/net/dst.h:451 iplocalout linux/net/ipv4/ipoutput.c:129 ipsendskb+0x3e5/0x560 linux/net/ipv4/ipoutput.c:1492 udpsendskb+0x73f/0x1530 linux/net/ipv4/udp.c:963 udpsendmsg+0x1a36/0x2b40 linux/net/ipv4/udp.c:1250 inetsendmsg+0x105/0x140 linux/net/ipv4/afinet.c:850 socksendmsgnosec linux/net/socket.c:730 socksendmsg linux/net/socket.c:745 syssendto+0x42c/0x4e0 linux/net/socket.c:2191 dosyssendto linux/net/socket.c:2203 sesyssendto linux/net/socket.c:2199 x64syssendto+0xe0/0x1c0 linux/net/socket.c:2199 dosyscallx64 linux/arch/x86/entry/common.c:52 dosyscall ---truncated---
hvnetvsc: Don't free decrypted memory
In the Linux kernel, the following vulnerability has been resolved:
NFSD: Fix nfsd4encodefattr4() crasher
Ensure that args.acl is initialized early. It is used in an unconditional call to kfree() on the way out of nfsd4encodefattr4().
In the Linux kernel, the following vulnerability has been resolved:
Drivers: hv: vmbus: Track decrypted status in vmbusgpadl
In CoCo VMs it is possible for the untrusted host to cause setmemoryencrypted() or setmemorydecrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues.
In order to make sure callers of vmbusestablishgpadl() and vmbusteardowngpadl() don't return decrypted/shared pages to allocators, add a field in struct vmbusgpadl to keep track of the decryption status of the buffers. This will allow the callers to know if they should free or leak the pages.
In the Linux kernel, the following vulnerability has been resolved:
Drivers: hv: vmbus: Leak pages if setmemoryencrypted() fails
In CoCo VMs it is possible for the untrusted host to cause setmemoryencrypted() or setmemorydecrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues.
VMBus code could free decrypted pages if setmemoryencrypted()/decrypted() fails. Leak the pages if this happens.
Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: Properly link new fs rules into the tree
Previously, addrulefg would only add newly created rules from the handle into the tree when they had a refcount of 1. On the other hand, createflowhandle tries hard to find and reference already existing identical rules instead of creating new ones.
These two behaviors can result in a situation where createflowhandle 1) creates a new rule and references it, then 2) in a subsequent step during the same handle creation references it again, resulting in a rule with a refcount of 2 that is not linked into the tree, will have a NULL parent and root and will result in a crash when the flow group is deleted because delswhwrule, invoked on rule deletion, assumes node->parent is != NULL.
This happened in the wild, due to another bug related to incorrect handling of duplicate pktreformat ids, which lead to the code in createflowhandle incorrectly referencing a just-added rule in the same flow handle, resulting in the problem described above. Full details are at [1].
This patch changes addrulefg to add new rules without parents into the tree, properly initializing them and avoiding the crash. This makes it more consistent with how rules are added to an FTE in createflowhandle.
In the Linux kernel, the following vulnerability has been resolved:
USB: core: Fix access violation during port device removal
Testing with KASAN and syzkaller revealed a bug in port.c:disablestore(): usbhubtostructhub() can return NULL if the hub that the port belongs to is concurrently removed, but the function does not check for this possibility before dereferencing the returned value.
It turns out that the first dereference is unnecessary, since hub->intfdev is the parent of the port device, so it can be changed easily. Adding a check for hub == NULL prevents further problems.
The same bug exists in the disableshow() routine, and it can be fixed the same way.
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix command flush on cable pull
System crash due to command failed to flush back to SCSI layer.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 27 PID: 793455 Comm: kworker/u130:6 Kdump: loaded Tainted: G OE --------- - - 4.18.0-372.9.1.el8.x8664 #1 Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 09/03/2021 Workqueue: nvme-wq nvmefcconnectctrlwork [nvmefc] RIP: 0010:wakeupcommon+0x4c/0x190 Code: 24 10 4d 85 c9 74 0a 41 f6 01 04 0f 85 9d 00 00 00 48 8b 43 08 48 83 c3 08 4c 8d 48 e8 49 8d 41 18 48 39 c3 0f 84 f0 00 00 00 <49> 8b 41 18 89 54 24 08 31 ed 4c 8d 70 e8 45 8b 29 41 f6 c5 04 75 RSP: 0018:ffff95f3e0cb7cd0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff8b08d3b26328 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8b08d3b26320 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffffffffffe8 R10: 0000000000000000 R11: ffff95f3e0cb7a60 R12: ffff95f3e0cb7d20 R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8b2fdf6c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000002f1e410002 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: wakeupcommonlock+0x7c/0xc0 qlanvmelsreq+0x355/0x4c0 [qla2xxx] qla2xxx [0000:12:00.1]-f084:3: qltfreesessiondone: sesess 0000000000000000 / sess ffff8ae1407ca000 from port 21:32:00:02:ac:07:ee:b8 loopid 0x02 sid 01:02:00 logout 1 keep 0 elslogo 0 ? nvmefcsendlsreq+0x260/0x380 [nvmefc] qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:00:02:ac:07:ee:b8 state transitioned from ONLINE to LOST - portid=010200. ? nvmefcsendlsreq.constprop.42+0x1a/0x45 [nvmefc] qla2xxx [0000:12:00.1]-2109:3: qla2x00schedulerportdel 21320002ac07eeb8. rport ffff8ae598122000 roles 1 ? nvmefcconnectctrlwork.cold.63+0x1e3/0xa7d [nvmefc] qla2xxx [0000:12:00.1]-f084:3: qltfreesessiondone: sesess 0000000000000000 / sess ffff8ae14801e000 from port 21:32:01:02:ad:f7:ee:b8 loopid 0x04 sid 01:02:01 logout 1 keep 0 elslogo 0 ? switchto+0x10c/0x450 ? processonework+0x1a7/0x360 qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:01:02:ad:f7:ee:b8 state transitioned from ONLINE to LOST - portid=010201. ? workerthread+0x1ce/0x390 ? createworker+0x1a0/0x1a0 qla2xxx [0000:12:00.1]-2109:3: qla2x00schedulerportdel 21320102adf7eeb8. rport ffff8ae3b2312800 roles 70 ? kthread+0x10a/0x120 qla2xxx [0000:12:00.1]-2112:3: qlanvmeunregisterremoteport: unregister remoteport on ffff8ae14801e000 21320102adf7eeb8 ? setkthreadstruct+0x40/0x40 qla2xxx [0000:12:00.1]-2110:3: remoteportdelete of ffff8ae14801e000 21320102adf7eeb8 completed. ? retfromfork+0x1f/0x40 qla2xxx [0000:12:00.1]-f086:3: qltfreesessiondone: waiting for sess ffff8ae14801e000 logout
The system was under memory stress where driver was not able to allocate an SRB to carry out error recovery of cable pull. The failure to flush causes upper layer to start modifying scsicmnd. When the system frees up some memory, the subsequent cable pull trigger another command flush. At this point the driver access a null pointer when attempting to DMA unmap the SGL.
Add a check to make sure commands are flush back on session tear down to prevent the null pointer access.
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status
Check kvmmmupageadneedwriteprotect() when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any role-specific reasons for disabling D-bit dirty logging.
Specifically, TDP MMU SPTEs must be write-protected when the TDP MMU is being used to run an L2 (i.e. L1 has disabled EPT) and PML is enabled. KVM always disables PML when running L2, even when L1 and L2 GPAs are in the some domain, so failing to write-protect TDP MMU SPTEs will cause writes made by L2 to not be reflected in the dirty log.
[sean: massage shortlog and changelog, tweak ternary op formatting]
In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrumacltcam: Fix possible use-after-free during rehash
The Linux kernel CVE team has assigned CVE-2024-35854 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051740-CVE-2024-35854-d17b@gregkh/T
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btusb: mediatek: Fix double free of skb in coredump
hcidevcdappend() would free the skb on error so the caller don't have to free it again otherwise it would cause the double free of skb.
Reported-by : Dan Carpenter <dan.carpenter@linaro.org>
ax25: fix use-after-free bugs caused by ax25dsdeltimer
In the Linux kernel, the following vulnerability has been resolved:
nfc: nci: Fix uninit-value in ncidevup and ncintfpacket
syzbot reported the following uninit-value access issue [1][2]:
ncirxwork() parses and processes received packet. When the payload length is zero, each message type handler reads uninitialized payload and KMSAN detects this issue. The receipt of a packet with a zero-size payload is considered unexpected, and therefore, such packets should be silently discarded.
This patch resolved this issue by checking payload size before calling each message type handler codes.
In the Linux kernel, the following vulnerability has been resolved:
kprobes: Fix possible use-after-free issue on kprobe registration
When unloading a module, its state is changing MODULESTATELIVE -> MODULESTATEGOING -> MODULESTATEUNFORMED. Each change will take a time. ismoduletextaddress() and moduletextaddress() works with MODULESTATELIVE and MODULESTATEGOING. If we use ismoduletextaddress() and moduletextaddress() separately, there is a chance that the first one is succeeded but the next one is failed because module->state becomes MODULESTATEUNFORMED between those operations.
In checkkprobeaddresssafe(), if the second moduletextaddress() is failed, that is ignored because it expected a kerneltext address. But it may have failed simply because module->state has been changed to MODULESTATEUNFORMED. In this case, armkprobe() will try to modify non-exist module text address (use-after-free).
To fix this problem, we should not use separated ismoduletextaddress() and moduletextaddress(), but use only moduletextaddress() once and do trymoduleget(module) which is only available with MODULESTATELIVE.
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix race condition between ipv6getifaddr and ipv6deladdr
Although ipv6getifaddr walks inet6addrlst under the RCU lock, it still means hlistforeachentryrcu can return an item that got removed from the list. The memory itself of such item is not freed thanks to RCU but nothing guarantees the actual content of the memory is sane.
In particular, the reference count can be zero. This can happen if ipv6deladdr is called in parallel. ipv6deladdr removes the entry from inet6addrlst (hlistdelinitrcu(&ifp->addrlst)) and drops all references (in6ifaput(ifp) + in6ifaput(ifp)). With bad enough timing, this can happen:
1. In ipv6getifaddr, hlistforeachentryrcu returns an entry.
2. Then, the whole ipv6deladdr is executed for the given entry. The reference count drops to zero and kfreercu is scheduled.
3. ipv6getifaddr continues and tries to increments the reference count (in6ifahold).
4. The rcu is unlocked and the entry is freed.
5. The freed entry is returned.
Prevent increasing of the reference count in such case. The name in6ifaholdsafe is chosen to mimic the existing fib6infoholdsafe.
[ 41.506330] refcountt: addition on 0; use-after-free. [ 41.506760] WARNING: CPU: 0 PID: 595 at lib/refcount.c:25 refcountwarnsaturate+0xa5/0x130 [ 41.507413] Modules linked in: veth bridge stp llc [ 41.507821] CPU: 0 PID: 595 Comm: python3 Not tainted 6.9.0-rc2.main-00208-g49563be82afa #14 [ 41.508479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) [ 41.509163] RIP: 0010:refcountwarnsaturate+0xa5/0x130 [ 41.509586] Code: ad ff 90 0f 0b 90 90 c3 cc cc cc cc 80 3d c0 30 ad 01 00 75 a0 c6 05 b7 30 ad 01 01 90 48 c7 c7 38 cc 7a 8c e8 cc 18 ad ff 90 <0f> 0b 90 90 c3 cc cc cc cc 80 3d 98 30 ad 01 00 0f 85 75 ff ff ff [ 41.510956] RSP: 0018:ffffbda3c026baf0 EFLAGS: 00010282 [ 41.511368] RAX: 0000000000000000 RBX: ffff9e9c46914800 RCX: 0000000000000000 [ 41.511910] RDX: ffff9e9c7ec29c00 RSI: ffff9e9c7ec1c900 RDI: ffff9e9c7ec1c900 [ 41.512445] RBP: ffff9e9c43660c9c R08: 0000000000009ffb R09: 00000000ffffdfff [ 41.512998] R10: 00000000ffffdfff R11: ffffffff8ca58a40 R12: ffff9e9c4339a000 [ 41.513534] R13: 0000000000000001 R14: ffff9e9c438a0000 R15: ffffbda3c026bb48 [ 41.514086] FS: 00007fbc4cda1740(0000) GS:ffff9e9c7ec00000(0000) knlGS:0000000000000000 [ 41.514726] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.515176] CR2: 000056233b337d88 CR3: 000000000376e006 CR4: 0000000000370ef0 [ 41.515713] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.516252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.516799] Call Trace: [ 41.517037] <TASK> [ 41.517249] ? warn+0x7b/0x120 [ 41.517535] ? refcountwarnsaturate+0xa5/0x130 [ 41.517923] ? reportbug+0x164/0x190 [ 41.518240] ? handlebug+0x3d/0x70 [ 41.518541] ? excinvalidop+0x17/0x70 [ 41.520972] ? asmexcinvalidop+0x1a/0x20 [ 41.521325] ? refcountwarnsaturate+0xa5/0x130 [ 41.521708] ipv6getifaddr+0xda/0xe0 [ 41.522035] inet6rtmgetaddr+0x342/0x3f0 [ 41.522376] ? pfxinet6rtmgetaddr+0x10/0x10 [ 41.522758] rtnetlinkrcvmsg+0x334/0x3d0 [ 41.523102] ? netlinkunicast+0x30f/0x390 [ 41.523445] ? pfxrtnetlinkrcvmsg+0x10/0x10 [ 41.523832] netlinkrcvskb+0x53/0x100 [ 41.524157] netlinkunicast+0x23b/0x390 [ 41.524484] netlinksendmsg+0x1f2/0x440 [ 41.524826] syssendto+0x1d8/0x1f0 [ 41.525145] x64syssendto+0x1f/0x30 [ 41.525467] dosyscall64+0xa5/0x1b0 [ 41.525794] entrySYSCALL64afterhwframe+0x72/0x7a [ 41.526213] RIP: 0033:0x7fbc4cfcea9a [ 41.526528] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 [ 41.527942] RSP: 002b:00007f ---truncated---
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix slab-use-after-free in l2capconnect()
Extend a critical section to prevent chan from early freeing. Also make the l2capconnect() return type void. Nothing is using the returned value but it is ugly to return a potentially freed pointer. Making it void will help with backports because earlier kernels did use the return value. Now the compile will break for kernels where this patch is not a complete fix.
Call stack summary:
[use] l2capbredrsigcmd l2capconnect ┌ mutexlock(&conn->chanlock); │ chan = pchan->ops->newconnection(pchan); <- alloc chan │ l2capchanadd(conn, chan); │ l2capchanhold(chan); │ listadd(&chan->list, &conn->chanl); ... (1) └ mutexunlock(&conn->chanlock); chan->confstate ... (4) <- use after free
[free] l2capconndel ┌ mutexlock(&conn->chanlock); │ foreach chan in conn->chanl: ... (2) │ l2capchanput(chan); │ l2capchandestroy │ kfree(chan) ... (3) <- chan freed └ mutexunlock(&conn->chanlock);
================================================================== BUG: KASAN: slab-use-after-free in instrumentatomicread include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in testbit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in l2capconnect+0xa67/0x11a0 net/bluetooth/l2capcore.c:4260 Read of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: read txq->readptr under lock
If we read txq->readptr without lock, we can read the same value twice, then obtain the lock, and reclaim from there to two different places, but crucially reclaim the same entry twice, resulting in the WARNONCE() a little later. Fix that by reading txq->readptr under lock.
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: guard against invalid STA ID on removal
Guard against invalid station IDs in iwlmvmmldrmstaid as that would result in out-of-bounds array accesses. This prevents issues should the driver get into a bad state during error handling.
In the Linux kernel, the following vulnerability has been resolved:
fs/9p: only translate RWX permissions for plain 9P2000
Garbage in plain 9P2000's perm bits is allowed through, which causes it to be able to set (among others) the suid bit. This was presumably not the intent since the unix extended bits are handled explicitly and conditionally on .u.
In the Linux kernel, the following vulnerability has been resolved:
idpf: fix kernel panic on unknown packet types
In the very rare case where a packet type is unknown to the driver, idpfrxprocessskbfields would return early without calling ethtypetrans to set the skb protocol / the network layer handler. This is especially problematic if tcpdump is running when such a packet is received, i.e. it would cause a kernel panic.
Instead, call ethtypetrans for every single packet, even when the packet type is unknown.