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| author | Stefano Stabellini <stefano.stabellini@xilinx.com> | 2021-11-15 23:27:19 +0100 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2021-11-16 23:15:42 +0100 |
| commit | 08f6c2b09ebd4b326dbe96d13f94fee8f9814c78 (patch) | |
| tree | 491dd5916ad0b58792dd12ca970b0351b2ae8f4c /drivers/xen/xenbus/xenbus_probe.c | |
| parent | xen/privcmd: make option visible in Kconfig (diff) | |
| download | linux-08f6c2b09ebd4b326dbe96d13f94fee8f9814c78.tar.xz linux-08f6c2b09ebd4b326dbe96d13f94fee8f9814c78.zip | |
xen: don't continue xenstore initialization in case of errors
In case of errors in xenbus_init (e.g. missing xen_store_gfn parameter),
we goto out_error but we forget to reset xen_store_domain_type to
XS_UNKNOWN. As a consequence xenbus_probe_initcall and other initcalls
will still try to initialize xenstore resulting into a crash at boot.
[ 2.479830] Call trace:
[ 2.482314] xb_init_comms+0x18/0x150
[ 2.486354] xs_init+0x34/0x138
[ 2.489786] xenbus_probe+0x4c/0x70
[ 2.498432] xenbus_probe_initcall+0x2c/0x7c
[ 2.503944] do_one_initcall+0x54/0x1b8
[ 2.507358] kernel_init_freeable+0x1ac/0x210
[ 2.511617] kernel_init+0x28/0x130
[ 2.516112] ret_from_fork+0x10/0x20
Cc: <Stable@vger.kernel.org>
Cc: jbeulich@suse.com
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Link: https://lore.kernel.org/r/20211115222719.2558207-1-sstabellini@kernel.org
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/xenbus/xenbus_probe.c')
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index bd003ca8acbe..5967aa937255 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -909,7 +909,7 @@ static struct notifier_block xenbus_resume_nb = { static int __init xenbus_init(void) { - int err = 0; + int err; uint64_t v = 0; xen_store_domain_type = XS_UNKNOWN; @@ -983,8 +983,10 @@ static int __init xenbus_init(void) */ proc_create_mount_point("xen"); #endif + return 0; out_error: + xen_store_domain_type = XS_UNKNOWN; return err; } |