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ANDROID: fuse-bpf: Run bpf with migration disabled

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To avoid a BUG_ON, we must disable migration before running any bpf
program.

Bug: 273620140
Test: fuse-test passes, no bug with CONFIG_DEBUG_ATOMIC_SLEEP
Change-Id: I9ed69ae93fc4b922782fccde293cb02b3eae3f06
Signed-off-by: Paul Lawrence <paullawrence@google.com>
(cherry picked from commit 0411f8d9df)
This commit is contained in:
Paul Lawrence
2023-03-30 13:47:33 -07:00
parent 17e313abe9
commit 3355e398f3
1 changed files with 12 additions and 2 deletions
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14
fs/fuse/fuse_i.h
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@@ -1917,6 +1917,16 @@ void __exit fuse_bpf_cleanup(void);
ssize_t fuse_bpf_simple_request(struct fuse_mount *fm, struct fuse_bpf_args *args);
static inline int fuse_bpf_run(struct bpf_prog *prog, struct fuse_bpf_args *fba)
{
int ret;
migrate_disable();
ret = bpf_prog_run(prog, fba);
migrate_enable();
return ret;
}
/*
* expression statement to wrap the backing filter logic
* struct inode *inode: inode with bpf and backing inode
@@ -1968,7 +1978,7 @@ ssize_t fuse_bpf_simple_request(struct fuse_mount *fm, struct fuse_bpf_args *arg
fa.out_numargs = fa.in_numargs; \
\
ext_flags = fuse_inode->bpf ? \
bpf_prog_run(fuse_inode->bpf, &fa) : \
fuse_bpf_run(fuse_inode->bpf, &fa) : \
FUSE_BPF_BACKING; \
if (ext_flags < 0) { \
fer = (struct fuse_err_ret) { \
@@ -2023,7 +2033,7 @@ ssize_t fuse_bpf_simple_request(struct fuse_mount *fm, struct fuse_bpf_args *arg
.size = fa.out_args[i].size, \
.value = fa.out_args[i].value, \
}; \
ext_flags = bpf_prog_run(fuse_inode->bpf, &fa); \
ext_flags = fuse_bpf_run(fuse_inode->bpf, &fa); \
if (ext_flags < 0) { \
fer = (struct fuse_err_ret) { \
ERR_PTR(ext_flags), \