** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Description changed:
+ == SRU Justification ==
Currently, when writing
-
- echo 18446744073709551616 > /proc/sys/fs/file-max
-
+ echo 18446744073709551616 > /proc/sys/fs/file-max
+
/proc/sys/fs/file-max will overflow and be set to 0.
- That quickly crashes the system.
- This issue can be reproduced with the sysctl02 test in LTP.
+ The upper and lower limit need to be defined properly to avoid this
+ issue.
+
+ == Fix ==
+ * 32a5ad9c sysctl: handle overflow for file-max
+ * 9002b214 kernel/sysctl.c: fix out-of-bounds access when setting file-max
+
+ These patches can be cherry-picked into B/C.
+ They have already been applied in X/D from stable update process.
+
+ == Test ==
+ This issue can be verified with the sysctl02 test in LTP.
+
+ == Regression Potential ==
+ Low
+
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-52-generic 4.15.0-52.56
ProcVersionSignature: User Name 4.15.0-52.56-generic 4.15.18
Uname: Linux 4.15.0-52-generic x86_64
AlsaDevices:
- total 0
- crw-rw---- 1 root audio 116, 1 Jun 25 11:03 seq
- crw-rw---- 1 root audio 116, 33 Jun 25 11:03 timer
+ total 0
+ crw-rw---- 1 root audio 116, 1 Jun 25 11:03 seq
+ crw-rw---- 1 root audio 116, 33 Jun 25 11:03 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Tue Jun 25 11:04:55 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:
-
+
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-52-generic
root=UUID=6f08d1c2-d443-47ee-97ca-2aeb1bf53f35 ro
RelatedPackageVersions:
- linux-restricted-modules-4.15.0-52-generic N/A
- linux-backports-modules-4.15.0-52-generic N/A
- linux-firmware 1.173.6
+ linux-restricted-modules-4.15.0-52-generic N/A
+ linux-backports-modules-4.15.0-52-generic N/A
+ linux-firmware 1.173.6
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-xenial
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-xenial:cvnQEMU:ct1:cvrpc-i440fx-xenial:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-xenial
dmi.sys.vendor: QEMU
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Cosmic)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Cosmic)
Status: Confirmed => In Progress
** Tags added: cosmic
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https://bugs.launchpad.net/bugs/1834310
Title:
Handle overflow for file-max
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