CVE-2025-38464 (GCVE-0-2025-38464)
Vulnerability from cvelistv5
Published
2025-07-25 15:27
Modified
2025-07-28 04:23
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
tipc: Fix use-after-free in tipc_conn_close().
syzbot reported a null-ptr-deref in tipc_conn_close() during netns
dismantle. [0]
tipc_topsrv_stop() iterates tipc_net(net)->topsrv->conn_idr and calls
tipc_conn_close() for each tipc_conn.
The problem is that tipc_conn_close() is called after releasing the
IDR lock.
At the same time, there might be tipc_conn_recv_work() running and it
could call tipc_conn_close() for the same tipc_conn and release its
last ->kref.
Once we release the IDR lock in tipc_topsrv_stop(), there is no
guarantee that the tipc_conn is alive.
Let's hold the ref before releasing the lock and put the ref after
tipc_conn_close() in tipc_topsrv_stop().
[0]:
BUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165
Read of size 8 at addr ffff888099305a08 by task kworker/u4:3/435
CPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165
tipc_topsrv_stop net/tipc/topsrv.c:701 [inline]
tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722
ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Allocated by task 23:
kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
kzalloc include/linux/slab.h:709 [inline]
tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192
tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Freed by task 23:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
tipc_conn_kref_release net/tipc/topsrv.c:150 [inline]
kref_put include/linux/kref.h:70 [inline]
conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
The buggy address belongs to the object at ffff888099305a00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
512-byte region [ffff888099305a00, ffff888099305c00)
The buggy address belongs to the page:
page:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940
raw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
References
Impacted products
Vendor | Product | Version | ||
---|---|---|---|---|
► | Linux | Linux |
Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f Version: c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f |
|
{ "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "net/tipc/topsrv.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "03dcdd2558e1e55bf843822fe4363dcb48743f2b", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "15a6f4971e2f157d57e09ea748d1fbc714277aa4", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "dab8ded2e5ff41012a6ff400b44dbe76ccf3592a", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "1dbf7cd2454a28b1da700085b99346b5445aeabb", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "be4b8392da7978294f2f368799d29dd509fb6c4d", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "50aa2d121bc2cfe2d825f8a331ea75dfaaab6a50", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "3b89e17b2fd64012682bed158d9eb3d2e96dec42", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" }, { "lessThan": "667eeab4999e981c96b447a4df5f20bdf5c26f13", "status": "affected", "version": "c5fa7b3cf3cb22e4ac60485fc2dc187fe012910f", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "net/tipc/topsrv.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "3.11" }, { "lessThan": "3.11", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.296", "versionType": "semver" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.240", "versionType": "semver" }, { "lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.189", "versionType": "semver" }, { "lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.146", "versionType": "semver" }, { "lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.99", "versionType": "semver" }, { "lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.39", "versionType": "semver" }, { "lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.7", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.296", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.240", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.189", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.146", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.99", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.39", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.15.7", "versionStartIncluding": "3.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.16", "versionStartIncluding": "3.11", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Fix use-after-free in tipc_conn_close().\n\nsyzbot reported a null-ptr-deref in tipc_conn_close() during netns\ndismantle. [0]\n\ntipc_topsrv_stop() iterates tipc_net(net)-\u003etopsrv-\u003econn_idr and calls\ntipc_conn_close() for each tipc_conn.\n\nThe problem is that tipc_conn_close() is called after releasing the\nIDR lock.\n\nAt the same time, there might be tipc_conn_recv_work() running and it\ncould call tipc_conn_close() for the same tipc_conn and release its\nlast -\u003ekref.\n\nOnce we release the IDR lock in tipc_topsrv_stop(), there is no\nguarantee that the tipc_conn is alive.\n\nLet\u0027s hold the ref before releasing the lock and put the ref after\ntipc_conn_close() in tipc_topsrv_stop().\n\n[0]:\nBUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\nRead of size 8 at addr ffff888099305a08 by task kworker/u4:3/435\n\nCPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x1fc/0x2ef lib/dump_stack.c:118\n print_address_description.cold+0x54/0x219 mm/kasan/report.c:256\n kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354\n kasan_report mm/kasan/report.c:412 [inline]\n __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433\n tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\n tipc_topsrv_stop net/tipc/topsrv.c:701 [inline]\n tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722\n ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153\n cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nAllocated by task 23:\n kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625\n kmalloc include/linux/slab.h:515 [inline]\n kzalloc include/linux/slab.h:709 [inline]\n tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192\n tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nFreed by task 23:\n __cache_free mm/slab.c:3503 [inline]\n kfree+0xcc/0x210 mm/slab.c:3822\n tipc_conn_kref_release net/tipc/topsrv.c:150 [inline]\n kref_put include/linux/kref.h:70 [inline]\n conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nThe buggy address belongs to the object at ffff888099305a00\n which belongs to the cache kmalloc-512 of size 512\nThe buggy address is located 8 bytes inside of\n 512-byte region [ffff888099305a00, ffff888099305c00)\nThe buggy address belongs to the page:\npage:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0\nflags: 0xfff00000000100(slab)\nraw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940\nraw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n\u003effff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ^\n ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb" } ], "providerMetadata": { "dateUpdated": "2025-07-28T04:23:12.269Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/03dcdd2558e1e55bf843822fe4363dcb48743f2b" }, { "url": "https://git.kernel.org/stable/c/15a6f4971e2f157d57e09ea748d1fbc714277aa4" }, { "url": "https://git.kernel.org/stable/c/dab8ded2e5ff41012a6ff400b44dbe76ccf3592a" }, { "url": "https://git.kernel.org/stable/c/1dbf7cd2454a28b1da700085b99346b5445aeabb" }, { "url": "https://git.kernel.org/stable/c/be4b8392da7978294f2f368799d29dd509fb6c4d" }, { "url": "https://git.kernel.org/stable/c/50aa2d121bc2cfe2d825f8a331ea75dfaaab6a50" }, { "url": "https://git.kernel.org/stable/c/3b89e17b2fd64012682bed158d9eb3d2e96dec42" }, { "url": "https://git.kernel.org/stable/c/667eeab4999e981c96b447a4df5f20bdf5c26f13" } ], "title": "tipc: Fix use-after-free in tipc_conn_close().", "x_generator": { "engine": "bippy-1.2.0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2025-38464", "datePublished": "2025-07-25T15:27:46.708Z", "dateReserved": "2025-04-16T04:51:24.020Z", "dateUpdated": "2025-07-28T04:23:12.269Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2025-38464\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-25T16:15:32.383\",\"lastModified\":\"2025-07-29T14:14:55.157\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: Fix use-after-free in tipc_conn_close().\\n\\nsyzbot reported a null-ptr-deref in tipc_conn_close() during netns\\ndismantle. [0]\\n\\ntipc_topsrv_stop() iterates tipc_net(net)-\u003etopsrv-\u003econn_idr and calls\\ntipc_conn_close() for each tipc_conn.\\n\\nThe problem is that tipc_conn_close() is called after releasing the\\nIDR lock.\\n\\nAt the same time, there might be tipc_conn_recv_work() running and it\\ncould call tipc_conn_close() for the same tipc_conn and release its\\nlast -\u003ekref.\\n\\nOnce we release the IDR lock in tipc_topsrv_stop(), there is no\\nguarantee that the tipc_conn is alive.\\n\\nLet\u0027s hold the ref before releasing the lock and put the ref after\\ntipc_conn_close() in tipc_topsrv_stop().\\n\\n[0]:\\nBUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\\nRead of size 8 at addr ffff888099305a08 by task kworker/u4:3/435\\n\\nCPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\nWorkqueue: netns cleanup_net\\nCall Trace:\\n __dump_stack lib/dump_stack.c:77 [inline]\\n dump_stack+0x1fc/0x2ef lib/dump_stack.c:118\\n print_address_description.cold+0x54/0x219 mm/kasan/report.c:256\\n kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354\\n kasan_report mm/kasan/report.c:412 [inline]\\n __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433\\n tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\\n tipc_topsrv_stop net/tipc/topsrv.c:701 [inline]\\n tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722\\n ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153\\n cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553\\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\\n kthread+0x33f/0x460 kernel/kthread.c:259\\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\\n\\nAllocated by task 23:\\n kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625\\n kmalloc include/linux/slab.h:515 [inline]\\n kzalloc include/linux/slab.h:709 [inline]\\n tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192\\n tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470\\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\\n kthread+0x33f/0x460 kernel/kthread.c:259\\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\\n\\nFreed by task 23:\\n __cache_free mm/slab.c:3503 [inline]\\n kfree+0xcc/0x210 mm/slab.c:3822\\n tipc_conn_kref_release net/tipc/topsrv.c:150 [inline]\\n kref_put include/linux/kref.h:70 [inline]\\n conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155\\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\\n kthread+0x33f/0x460 kernel/kthread.c:259\\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\\n\\nThe buggy address belongs to the object at ffff888099305a00\\n which belongs to the cache kmalloc-512 of size 512\\nThe buggy address is located 8 bytes inside of\\n 512-byte region [ffff888099305a00, ffff888099305c00)\\nThe buggy address belongs to the page:\\npage:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0\\nflags: 0xfff00000000100(slab)\\nraw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940\\nraw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000\\npage dumped because: kasan: bad access detected\\n\\nMemory state around the buggy address:\\n ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\\n\u003effff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ^\\n ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: Se ha corregido el error use-after-free en tipc_conn_close(). syzbot inform\u00f3 de un error \\\"null-ptr-deref\\\" en tipc_conn_close() durante el desmantelamiento de netns. [0] tipc_topsrv_stop() itera tipc_net(net)-\u0026gt;topsrv-\u0026gt;conn_idr e invoca tipc_conn_close() para cada tipc_conn. El problema es que tipc_conn_close() se invoca tras liberar el bloqueo IDR. Simult\u00e1neamente, tipc_conn_recv_work() podr\u00eda estar ejecut\u00e1ndose y podr\u00eda invocar tipc_conn_close() para el mismo tipc_conn y liberar su \u00faltimo -\u0026gt;kref. Una vez que liberamos el bloqueo IDR en tipc_topsrv_stop(), no hay garant\u00eda de que tipc_conn siga activo. Mantengamos la referencia antes de liberar el bloqueo y coloquemos la referencia despu\u00e9s de tipc_conn_close() en tipc_topsrv_stop(). [0]: BUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165 Read of size 8 at addr ffff888099305a08 by task kworker/u4:3/435 CPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165 tipc_topsrv_stop net/tipc/topsrv.c:701 [inline] tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Allocated by task 23: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192 tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Freed by task 23: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 tipc_conn_kref_release net/tipc/topsrv.c:150 [inline] kref_put include/linux/kref.h:70 [inline] conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff888099305a00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 8 bytes inside of 512-byte region [ffff888099305a00, ffff888099305c00) The buggy address belongs to the page: page:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940 raw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc \u0026gt;ffff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03dcdd2558e1e55bf843822fe4363dcb48743f2b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/15a6f4971e2f157d57e09ea748d1fbc714277aa4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1dbf7cd2454a28b1da700085b99346b5445aeabb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3b89e17b2fd64012682bed158d9eb3d2e96dec42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50aa2d121bc2cfe2d825f8a331ea75dfaaab6a50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/667eeab4999e981c96b447a4df5f20bdf5c26f13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be4b8392da7978294f2f368799d29dd509fb6c4d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dab8ded2e5ff41012a6ff400b44dbe76ccf3592a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}" } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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