CVSS: -EPSS: 0%CPEs: 11EXPL: 0CVE-2021-46981 – nbd: Fix NULL pointer in flush_workqueue
https://notcve.org/view.php?id=CVE-2021-46981
In the Linux kernel, the following vulnerability has been resolved: nbd: Fix NULL pointer in flush_workqueue Open /dev/nbdX first, the config_refs will be 1 and the pointers in nbd_device are still null. Disconnect /dev/nbdX, then reference a null recv_workq. The protection by config_refs in nbd_genl_disconnect is useless. [ 656.366194] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 656.368943] #PF: supervisor write access in kernel mode [ 656.369844] #PF: error_code(0x0002) - not-present page [ 656.370717] PGD 10cc87067 P4D 10cc87067 PUD 1074b4067 PMD 0 [ 656.371693] Oops: 0002 [#1] SMP [ 656.372242] CPU: 5 PID: 7977 Comm: nbd-client Not tainted 5.11.0-rc5-00040-g76c057c84d28 #1 [ 656.373661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 656.375904] RIP: 0010:mutex_lock+0x29/0x60 [ 656.376627] Code: 00 0f 1f 44 00 00 55 48 89 fd 48 83 05 6f d7 fe 08 01 e8 7a c3 ff ff 48 83 05 6a d7 fe 08 01 31 c0 65 48 8b 14 25 00 6d 01 00 <f0> 48 0f b1 55 d [ 656.378934] RSP: 0018:ffffc900005eb9b0 EFLAGS: 00010246 [ 656.379350] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 656.379915] RDX: ffff888104cf2600 RSI: ffffffffaae8f452 RDI: 0000000000000020 [ 656.380473] RBP: 0000000000000020 R08: 0000000000000000 R09: ffff88813bd6b318 [ 656.381039] R10: 00000000000000c7 R11: fefefefefefefeff R12: ffff888102710b40 [ 656.381599] R13: ffffc900005eb9e0 R14: ffffffffb2930680 R15: ffff88810770ef00 [ 656.382166] FS: 00007fdf117ebb40(0000) GS:ffff88813bd40000(0000) knlGS:0000000000000000 [ 656.382806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 656.383261] CR2: 0000000000000020 CR3: 0000000100c84000 CR4: 00000000000006e0 [ 656.383819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 656.384370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 656.384927] Call Trace: [ 656.385111] flush_workqueue+0x92/0x6c0 [ 656.385395] nbd_disconnect_and_put+0x81/0xd0 [ 656.385716] nbd_genl_disconnect+0x125/0x2a0 [ 656.386034] genl_family_rcv_msg_doit.isra.0+0x102/0x1b0 [ 656.386422] genl_rcv_msg+0xfc/0x2b0 [ 656.386685] ? nbd_ioctl+0x490/0x490 [ 656.386954] ? • https://git.kernel.org/stable/c/e9e006f5fcf2bab59149cb38a48a4817c1b538b4 https://git.kernel.org/stable/c/0b584bf573ae59021069c056c22d65d5721910cb https://git.kernel.org/stable/c/d1db913b044f0a0693d8ee283d26b81d536efcd5 https://git.kernel.org/stable/c/9f0f39c92e4f50189155dfb13bb5524372e40eba https://git.kernel.org/stable/c/e83a26a49356a3dbd4f54102abe17fc594643698 https://git.kernel.org/stable/c/92ec11cccb7fc14331e000ab2337f60aa433433e https://git.kernel.org/stable/c/b3ead320dce6c7d7206103deca766b317591c286 https://git.kernel.org/stable/c/1c4962df938891af9ab4775f5224ef860 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2020-36784 – i2c: cadence: fix reference leak when pm_runtime_get_sync fails
https://notcve.org/view.php?id=CVE-2020-36784
In the Linux kernel, the following vulnerability has been resolved: i2c: cadence: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in functions cdns_i2c_master_xfer and cdns_reg_slave. However, pm_runtime_get_sync will increment pm usage counter even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: i2c: cadencia: corrige la fuga de referencia cuando falla pm_runtime_get_sync No se espera que el recuento de referencias de PM aumente al regresar en las funciones cdns_i2c_master_xfer y cdns_reg_slave. Sin embargo, pm_runtime_get_sync incrementará el contador de uso de pm incluso si falla. Olvidarse de poner en funcionamiento resultará en una fuga de referencia aquí. • https://git.kernel.org/stable/c/7fa32329ca03148fb2c07b4ef3247b8fc0488d6a https://git.kernel.org/stable/c/30410519328c94367e561fd878e5f0d3a0303585 https://git.kernel.org/stable/c/d57ff04e0ed6f3be1682ae861ead33f879225e07 https://git.kernel.org/stable/c/a45fc41beed8e0fe31864619c34aa00797fb60c1 https://git.kernel.org/stable/c/23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2020-36783 – i2c: img-scb: fix reference leak when pm_runtime_get_sync fails
https://notcve.org/view.php?id=CVE-2020-36783
In the Linux kernel, the following vulnerability has been resolved: i2c: img-scb: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in functions img_i2c_xfer and img_i2c_init. However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: i2c: img-scb: corrige la fuga de referencia cuando falla pm_runtime_get_sync No se espera que el recuento de referencias de PM aumente al regresar en las funciones img_i2c_xfer e img_i2c_init. Sin embargo, pm_runtime_get_sync incrementará el recuento de referencias de PM incluso si falla. Olvidarse de poner en funcionamiento resultará en una fuga de referencia aquí. • https://git.kernel.org/stable/c/93222bd9b966105f43418fd336654ad10045783a https://git.kernel.org/stable/c/4734c4b1d9573c9d20bbc46cf37dde095ee011b8 https://git.kernel.org/stable/c/e80ae8bde41266d3b8bf012460b6593851766006 https://git.kernel.org/stable/c/96c4a03658d661666c360959aa80cdabfe2972ed https://git.kernel.org/stable/c/7ee35cde1e810ad6ca589980b9ec2b7b62946a5b https://git.kernel.org/stable/c/223125e37af8a641ea4a09747a6a52172fc4b903 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2020-36782 – i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails
https://notcve.org/view.php?id=CVE-2020-36782
In the Linux kernel, the following vulnerability has been resolved: i2c: imx-lpi2c: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in lpi2c_imx_master_enable. However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: i2c: imx-lpi2c: corrige la fuga de referencia cuando falla pm_runtime_get_sync No se espera que el recuento de referencias de PM aumente al regresar en lpi2c_imx_master_enable. Sin embargo, pm_runtime_get_sync incrementará el recuento de referencias de PM incluso si falla. Olvidarse de poner en funcionamiento resultará en una fuga de referencia aquí. • https://git.kernel.org/stable/c/13d6eb20fc79a1e606307256dad4098375539a09 https://git.kernel.org/stable/c/815859cb1d2302e74f11bf6894bceace9ca9eb4a https://git.kernel.org/stable/c/cc49d206414240483bb93ffa3d80243e6a776916 https://git.kernel.org/stable/c/bb300acc867e937edc2a6898e92b21f88e4e4e66 https://git.kernel.org/stable/c/b100650d80cd2292f6c152f5f2943b5944b3e8ce https://git.kernel.org/stable/c/278e5bbdb9a94fa063c0f9bcde2479d0b8042462 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2020-36780 – i2c: sprd: fix reference leak when pm_runtime_get_sync fails
https://notcve.org/view.php?id=CVE-2020-36780
In the Linux kernel, the following vulnerability has been resolved: i2c: sprd: fix reference leak when pm_runtime_get_sync fails The PM reference count is not expected to be incremented on return in sprd_i2c_master_xfer() and sprd_i2c_remove(). However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: i2c: sprd: corrige la fuga de referencia cuando falla pm_runtime_get_sync No se espera que el recuento de referencias de PM aumente al regresar en sprd_i2c_master_xfer() y sprd_i2c_remove(). Sin embargo, pm_runtime_get_sync incrementará el recuento de referencias de PM incluso si falla. Olvidarse de poner en funcionamiento resultará en una fuga de referencia aquí. • https://git.kernel.org/stable/c/8b9ec0719834fe66146d138d62ed66cef025c864 https://git.kernel.org/stable/c/7e1764312440c5df9dfe6b436035a03673b0c1b9 https://git.kernel.org/stable/c/e547640cee7981fd751d2c9cde3a61bdb678b755 https://git.kernel.org/stable/c/9223505e938ba3db5907e058f4209770cff2f2a7 https://git.kernel.org/stable/c/d3406ab52097328a3bc4cbe124bfd8f6d51fb86f https://git.kernel.org/stable/c/3a4f326463117cee3adcb72999ca34a9aaafda93 •