https://github.com/torvalds/linux
Revision 140456f994195b568ecd7fc2287a34eadffef3ca authored by Andrey Ryabinin on 17 February 2021, 14:30:04 UTC, committed by Joerg Roedel on 04 March 2021, 12:15:56 UTC
increase_address_space() calls get_zeroed_page(gfp) under spin_lock with
disabled interrupts. gfp flags passed to increase_address_space() may allow
sleeping, so it comes to this:
BUG: sleeping function called from invalid context at mm/page_alloc.c:4342
in_atomic(): 1, irqs_disabled(): 1, pid: 21555, name: epdcbbf1qnhbsd8
Call Trace:
dump_stack+0x66/0x8b
___might_sleep+0xec/0x110
__alloc_pages_nodemask+0x104/0x300
get_zeroed_page+0x15/0x40
iommu_map_page+0xdd/0x3e0
amd_iommu_map+0x50/0x70
iommu_map+0x106/0x220
vfio_iommu_type1_ioctl+0x76e/0x950 [vfio_iommu_type1]
do_vfs_ioctl+0xa3/0x6f0
ksys_ioctl+0x66/0x70
__x64_sys_ioctl+0x16/0x20
do_syscall_64+0x4e/0x100
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fix this by moving get_zeroed_page() out of spin_lock/unlock section.
Fixes: 754265bcab ("iommu/amd: Fix race in increase_address_space()")
Signed-off-by: Andrey Ryabinin <arbn@yandex-team.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210217143004.19165-1-arbn@yandex-team.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
1 parent 45e606f
Tip revision: 140456f994195b568ecd7fc2287a34eadffef3ca authored by Andrey Ryabinin on 17 February 2021, 14:30:04 UTC
iommu/amd: Fix sleeping in atomic in increase_address_space()
iommu/amd: Fix sleeping in atomic in increase_address_space()
Tip revision: 140456f
| File | Mode | Size |
|---|---|---|
| 9p | ||
| adfs | ||
| affs | ||
| afs | ||
| autofs | ||
| befs | ||
| bfs | ||
| btrfs | ||
| cachefiles | ||
| ceph | ||
| cifs | ||
| coda | ||
| configfs | ||
| cramfs | ||
| crypto | ||
| debugfs | ||
| devpts | ||
| dlm | ||
| ecryptfs | ||
| efivarfs | ||
| efs | ||
| erofs | ||
| exfat | ||
| exportfs | ||
| ext2 | ||
| ext4 | ||
| f2fs | ||
| fat | ||
| freevxfs | ||
| fscache | ||
| fuse | ||
| gfs2 | ||
| hfs | ||
| hfsplus | ||
| hostfs | ||
| hpfs | ||
| hugetlbfs | ||
| iomap | ||
| isofs | ||
| jbd2 | ||
| jffs2 | ||
| jfs | ||
| kernfs | ||
| lockd | ||
| minix | ||
| nfs | ||
| nfs_common | ||
| nfsd | ||
| nilfs2 | ||
| nls | ||
| notify | ||
| ntfs | ||
| ocfs2 | ||
| omfs | ||
| openpromfs | ||
| orangefs | ||
| overlayfs | ||
| proc | ||
| pstore | ||
| qnx4 | ||
| qnx6 | ||
| quota | ||
| ramfs | ||
| reiserfs | ||
| romfs | ||
| squashfs | ||
| sysfs | ||
| sysv | ||
| tracefs | ||
| ubifs | ||
| udf | ||
| ufs | ||
| unicode | ||
| vboxsf | ||
| verity | ||
| xfs | ||
| zonefs | ||
| Kconfig | -rw-r--r-- | 8.5 KB |
| Kconfig.binfmt | -rw-r--r-- | 7.6 KB |
| Makefile | -rw-r--r-- | 4.5 KB |
| aio.c | -rw-r--r-- | 56.4 KB |
| anon_inodes.c | -rw-r--r-- | 4.6 KB |
| attr.c | -rw-r--r-- | 9.7 KB |
| bad_inode.c | -rw-r--r-- | 5.3 KB |
| binfmt_aout.c | -rw-r--r-- | 8.3 KB |
| binfmt_elf.c | -rw-r--r-- | 60.5 KB |
| binfmt_elf_fdpic.c | -rw-r--r-- | 44.1 KB |
| binfmt_em86.c | -rw-r--r-- | 2.7 KB |
| binfmt_flat.c | -rw-r--r-- | 28.3 KB |
| binfmt_misc.c | -rw-r--r-- | 17.3 KB |
| binfmt_script.c | -rw-r--r-- | 4.2 KB |
| block_dev.c | -rw-r--r-- | 48.0 KB |
| buffer.c | -rw-r--r-- | 89.1 KB |
| char_dev.c | -rw-r--r-- | 16.5 KB |
| compat_binfmt_elf.c | -rw-r--r-- | 3.8 KB |
| coredump.c | -rw-r--r-- | 27.7 KB |
| d_path.c | -rw-r--r-- | 11.4 KB |
| dax.c | -rw-r--r-- | 46.4 KB |
| dcache.c | -rw-r--r-- | 84.7 KB |
| dcookies.c | -rw-r--r-- | 7.1 KB |
| direct-io.c | -rw-r--r-- | 39.5 KB |
| drop_caches.c | -rw-r--r-- | 1.8 KB |
| eventfd.c | -rw-r--r-- | 12.1 KB |
| eventpoll.c | -rw-r--r-- | 63.8 KB |
| exec.c | -rw-r--r-- | 49.3 KB |
| fcntl.c | -rw-r--r-- | 23.4 KB |
| fhandle.c | -rw-r--r-- | 6.8 KB |
| file.c | -rw-r--r-- | 28.7 KB |
| file_table.c | -rw-r--r-- | 10.2 KB |
| filesystems.c | -rw-r--r-- | 6.4 KB |
| fs-writeback.c | -rw-r--r-- | 74.7 KB |
| fs_context.c | -rw-r--r-- | 17.2 KB |
| fs_parser.c | -rw-r--r-- | 10.1 KB |
| fs_pin.c | -rw-r--r-- | 1.9 KB |
| fs_struct.c | -rw-r--r-- | 3.4 KB |
| fs_types.c | -rw-r--r-- | 2.5 KB |
| fsopen.c | -rw-r--r-- | 11.0 KB |
| init.c | -rw-r--r-- | 5.9 KB |
| inode.c | -rw-r--r-- | 63.1 KB |
| internal.h | -rw-r--r-- | 5.1 KB |
| io-wq.c | -rw-r--r-- | 29.6 KB |
| io-wq.h | -rw-r--r-- | 3.6 KB |
| io_uring.c | -rw-r--r-- | 245.3 KB |
| ioctl.c | -rw-r--r-- | 20.9 KB |
| kernel_read_file.c | -rw-r--r-- | 4.4 KB |
| libfs.c | -rw-r--r-- | 39.6 KB |
| locks.c | -rw-r--r-- | 80.0 KB |
| mbcache.c | -rw-r--r-- | 12.0 KB |
| mount.h | -rw-r--r-- | 4.2 KB |
| mpage.c | -rw-r--r-- | 20.5 KB |
| namei.c | -rw-r--r-- | 120.0 KB |
| namespace.c | -rw-r--r-- | 98.5 KB |
| no-block.c | -rw-r--r-- | 478 bytes |
| nsfs.c | -rw-r--r-- | 6.6 KB |
| open.c | -rw-r--r-- | 33.3 KB |
| pipe.c | -rw-r--r-- | 33.8 KB |
| pnode.c | -rw-r--r-- | 15.1 KB |
| pnode.h | -rw-r--r-- | 1.9 KB |
| posix_acl.c | -rw-r--r-- | 21.5 KB |
| proc_namespace.c | -rw-r--r-- | 8.1 KB |
| read_write.c | -rw-r--r-- | 39.2 KB |
| readdir.c | -rw-r--r-- | 13.7 KB |
| remap_range.c | -rw-r--r-- | 13.9 KB |
| select.c | -rw-r--r-- | 34.7 KB |
| seq_file.c | -rw-r--r-- | 24.7 KB |
| signalfd.c | -rw-r--r-- | 9.0 KB |
| splice.c | -rw-r--r-- | 38.7 KB |
| stack.c | -rw-r--r-- | 2.5 KB |
| stat.c | -rw-r--r-- | 19.8 KB |
| statfs.c | -rw-r--r-- | 9.6 KB |
| super.c | -rw-r--r-- | 45.2 KB |
| sync.c | -rw-r--r-- | 10.5 KB |
| timerfd.c | -rw-r--r-- | 13.6 KB |
| userfaultfd.c | -rw-r--r-- | 52.0 KB |
| utimes.c | -rw-r--r-- | 7.6 KB |
| xattr.c | -rw-r--r-- | 26.2 KB |
Computing file changes ...
