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[ Upstream commit f09ff307c7299392f1c88f763299e24bc99811c7 ] syzbot attempts to write a buffer with a large size to a sysfs entry with writes handled by handle_policy_update(), triggering a warning in kmalloc. Check the size specified for write buffers before allocating. Reported-by: syzbot+4eb7a741b3216020043a@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=4eb7a741b3216020043a Signed-off-by: Leo Stone <leocstone@gmail.com> [PM: subject tweak] Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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| lsm.c | ||
| lsm.h | ||
| Makefile | ||
| securityfs.c | ||