CVE-2021-47435
published 2024-05-22CVE-2021-47435: In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls…
PriorityP416medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
EPSS
0.24%
15.0th percentile
In the Linux kernel, the following vulnerability has been resolved:
dm: fix mempool NULL pointer race when completing IO
dm_io_dec_pending() calls end_io_acct() first and will then dec md
in-flight pending count. But if a task is swapping DM table at same
time this can result in a crash due to mempool->elements being NULL:
task1 task2
do_resume
->do_suspend
->dm_wait_for_completion
bio_endio
->clone_endio
->dm_io_dec_pending
->end_io_acct
->wakeup task1
->dm_swap_table
->__bind
->__bind_mempools
->bioset_exit
->mempool_exit
->free_io
[ 67.330330] Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000000
......
[ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO)
[ 67.330510] pc : mempool_free+0x70/0xa0
[ 67.330515] lr : mempool_free+0x4c/0xa0
[ 67.330520] sp : ffffff8008013b20
[ 67.330524] x29: ffffff8008013b20 x28: 0000000000000004
[ 67.330530] x27: ffffffa8c2ff40a0 x26: 00000000ffff1cc8
[ 67.330535] x25: 0000000000000000 x24: ffffffdada34c800
[ 67.330541] x23: 0000000000000000 x22: ffffffdada34c800
[ 67.330547] x21: 00000000ffff1cc8 x20: ffffffd9a1304d80
[ 67.330552] x19: ffffffdada34c970 x18: 000000b312625d9c
[ 67.330558] x17: 00000000002dcfbf x16: 00000000000006dd
[ 67.330563] x15: 000000000093b41e x14: 0000000000000010
[ 67.330569] x13: 0000000000007f7a x12: 0000000034155555
[ 67.330574] x11: 0000000000000001 x10: 0000000000000001
[ 67.330579] x9 : 0000000000000000 x8 : 0000000000000000
[ 67.330585] x7 : 0000000000000000 x6 : ffffff80148b5c1a
[ 67.330590] x5 : ffffff8008013ae0 x4 : 0000000000000001
[ 67.330596] x3 : ffffff80080139c8 x2 : ffffff801083bab8
[ 67.330601] x1 : 0000000000000000 x0 : ffffffdada34c970
[ 67.330609] Call trace:
[ 67.330616] mempool_free+0x70/0xa0
[ 67.330627] bio_put+0xf8/0x110
[ 67.330638] dec_pending+0x13c/0x230
[ 67.330644] clone_endio+0x90/0x180
[ 67.330649] bio_endio+0x198/0x1b8
[ 67.330655] dec_pending+0x190/0x230
[ 67.330660] clone_endio+0x90/0x180
[ 67.330665] bio_endio+0x198/0x1b8
[ 67.330673] blk_u
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.16-1 (bookworm) | linux 5.14.16-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < 9fb7cd5c7fef0f1c982e3cd27745a0dec260eaed | 9fb7cd5c7fef0f1c982e3cd27745a0dec260eaed |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < d35aef9c60d310eff3eaddacce301efe877e2b7c | d35aef9c60d310eff3eaddacce301efe877e2b7c |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < 9e07272cca2ed76f7f6073f4444b1143828c8d87 | 9e07272cca2ed76f7f6073f4444b1143828c8d87 |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < ad1393b92e5059218d055bfec8f4946d85ad04c4 | ad1393b92e5059218d055bfec8f4946d85ad04c4 |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < d29c78d3f9c5d2604548c1065bf1ec212728ea61 | d29c78d3f9c5d2604548c1065bf1ec212728ea61 |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < 6e506f07c5b561d673dd0b0d8f7f420cc48024fb | 6e506f07c5b561d673dd0b0d8f7f420cc48024fb |
| linux | linux | >= 6a8736d10cb413be95ea443ba40f25c93f4ef9b2 < d208b89401e073de986dc891037c5a668f5d5d95 | d208b89401e073de986dc891037c5a668f5d5d95 |
| linux | linux_kernel | < 4.9.313 | 4.9.313 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.113-1 | 5.10.113-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 4.10 < 4.14.278 | 4.14.278 |
| linux | linux_kernel | >= 4.15 < 4.19.242 | 4.19.242 |
| linux | linux_kernel | >= 4.20 < 5.4.193 | 5.4.193 |
| linux | linux_kernel | >= 5.11 < 5.14.14 | 5.14.14 |
| linux | linux_kernel | >= 5.5 < 5.10.113 | 5.10.113 |
CVSS provenance
nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv4.7MEDIUM
vendor_debian4.7MEDIUM
vendor_redhat4.7MEDIUM
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OSV
CVE-2021-47435: In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end
osv·2024-05-22·CVSS 4.7
CVE-2021-47435 [MEDIUM] CVE-2021-47435: In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end
In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end_io_acct() first and will then dec md in-flight pending count. But if a task is swapping DM table at same time this can result in a crash due to mempool->elements being NULL: task1 task2 do_resume ->do_suspend ->dm_wait_for_completion bio_endio ->clone_endio ->dm_io_dec_pending ->end_io_acct ->wakeup task1 ->dm_swap_table ->__bind ->__bind_mempools ->bioset_exit ->mempool_exit ->free_io [ 67.330330] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 ...... [ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO) [ 67.330510] pc : mempool_free+0x70/0xa0 [ 67.330515] lr : mempool_free+0x4c/0xa0 [ 67.330520] sp : fff
GHSA
GHSA-3c5v-hp3x-r94q: In the Linux kernel, the following vulnerability has been resolved:
dm: fix mempool NULL pointer race when completing IO
dm_io_dec_pending() calls e
ghsa_unreviewed·2024-05-22
CVE-2021-47435 [MEDIUM] CWE-476 GHSA-3c5v-hp3x-r94q: In the Linux kernel, the following vulnerability has been resolved:
dm: fix mempool NULL pointer race when completing IO
dm_io_dec_pending() calls e
In the Linux kernel, the following vulnerability has been resolved:
dm: fix mempool NULL pointer race when completing IO
dm_io_dec_pending() calls end_io_acct() first and will then dec md
in-flight pending count. But if a task is swapping DM table at same
time this can result in a crash due to mempool->elements being NULL:
task1 task2
do_resume
->do_suspend
->dm_wait_for_completion
bio_endio
->clone_endio
->dm_io_dec_pending
->end_io_acct
->wakeup task1
->dm_swap_table
->__bind
->__bind_mempools
->bioset_exit
->mempool_exit
->free_io
[ 67.330330] Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000000
......
[ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO)
[ 67.330510] pc : mempool_free+0x70/0xa0
[ 67.330515] lr : mempool_free+0x4c/0xa0
[ 67.330520] sp :
Red Hat
kernel: dm: fix mempool NULL pointer race when completing IO
vendor_redhat·2024-05-22·CVSS 4.7
CVE-2021-47435 [MEDIUM] CWE-476 kernel: dm: fix mempool NULL pointer race when completing IO
kernel: dm: fix mempool NULL pointer race when completing IO
In the Linux kernel, the following vulnerability has been resolved:
dm: fix mempool NULL pointer race when completing IO
dm_io_dec_pending() calls end_io_acct() first and will then dec md
in-flight pending count. But if a task is swapping DM table at same
time this can result in a crash due to mempool->elements being NULL:
task1 task2
do_resume
->do_suspend
->dm_wait_for_completion
bio_endio
->clone_endio
->dm_io_dec_pending
->end_io_acct
->wakeup task1
->dm_swap_table
->__bind
->__bind_mempools
->bioset_exit
->mempool_exit
->free_io
[ 67.330330] Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000000
......
[ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO)
[ 67.330510] pc : mempool_free+0x70/0xa0
Debian
CVE-2021-47435: linux - In the Linux kernel, the following vulnerability has been resolved: dm: fix mem...
vendor_debian·2021·CVSS 4.7
CVE-2021-47435 [MEDIUM] CVE-2021-47435: linux - In the Linux kernel, the following vulnerability has been resolved: dm: fix mem...
In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end_io_acct() first and will then dec md in-flight pending count. But if a task is swapping DM table at same time this can result in a crash due to mempool->elements being NULL: task1 task2 do_resume ->do_suspend ->dm_wait_for_completion bio_endio ->clone_endio ->dm_io_dec_pending ->end_io_acct ->wakeup task1 ->dm_swap_table ->__bind ->__bind_mempools ->bioset_exit ->mempool_exit ->free_io [ 67.330330] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 ...... [ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO) [ 67.330510] pc : mempool_free+0x70/0xa0 [ 67.330515] lr : mempool_free+0x4c/0xa0 [ 67.330520] sp : fff
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/6e506f07c5b561d673dd0b0d8f7f420cc48024fbhttps://git.kernel.org/stable/c/9e07272cca2ed76f7f6073f4444b1143828c8d87https://git.kernel.org/stable/c/9fb7cd5c7fef0f1c982e3cd27745a0dec260eaedhttps://git.kernel.org/stable/c/ad1393b92e5059218d055bfec8f4946d85ad04c4https://git.kernel.org/stable/c/d208b89401e073de986dc891037c5a668f5d5d95https://git.kernel.org/stable/c/d29c78d3f9c5d2604548c1065bf1ec212728ea61https://git.kernel.org/stable/c/d35aef9c60d310eff3eaddacce301efe877e2b7chttps://git.kernel.org/stable/c/6e506f07c5b561d673dd0b0d8f7f420cc48024fbhttps://git.kernel.org/stable/c/9e07272cca2ed76f7f6073f4444b1143828c8d87https://git.kernel.org/stable/c/9fb7cd5c7fef0f1c982e3cd27745a0dec260eaedhttps://git.kernel.org/stable/c/ad1393b92e5059218d055bfec8f4946d85ad04c4https://git.kernel.org/stable/c/d208b89401e073de986dc891037c5a668f5d5d95https://git.kernel.org/stable/c/d29c78d3f9c5d2604548c1065bf1ec212728ea61https://git.kernel.org/stable/c/d35aef9c60d310eff3eaddacce301efe877e2b7c
2024-05-22
Published