git: 92a9501b6be3 - stable/14 - vm_object: do not assume that un_pager.devp.dev is cdev
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Date: Tue, 12 Nov 2024 23:19:48 UTC
The branch stable/14 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=92a9501b6be3d37a4eefcfbdda799b656ae146e8 commit 92a9501b6be3d37a4eefcfbdda799b656ae146e8 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2024-11-04 21:54:30 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-11-12 23:19:18 +0000 vm_object: do not assume that un_pager.devp.dev is cdev PR: 282533 (cherry picked from commit 580340dbdaaf372867e9ed3dd257430982753e5e) --- sys/kern/kern_proc.c | 5 +++-- sys/vm/vm_mmap.c | 3 +++ sys/vm/vm_object.c | 3 ++- sys/vm/vm_object.h | 1 + 4 files changed, 9 insertions(+), 3 deletions(-) diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c index 18302bb8abae..b7fa7bfb60e9 100644 --- a/sys/kern/kern_proc.c +++ b/sys/kern/kern_proc.c @@ -2718,8 +2718,9 @@ kern_proc_vmmap_out(struct proc *p, struct sbuf *sb, ssize_t maxlen, int flags) kve->kve_ref_count = obj->ref_count; kve->kve_shadow_count = obj->shadow_count; - if (obj->type == OBJT_DEVICE || - obj->type == OBJT_MGTDEVICE) { + if ((obj->type == OBJT_DEVICE || + obj->type == OBJT_MGTDEVICE) && + (obj->flags & OBJ_CDEVH) != 0) { cdev = obj->un_pager.devp.handle; if (cdev != NULL) { csw = dev_refthread(cdev, &ref); diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c index 6b0a70d523d5..21ec52b8124f 100644 --- a/sys/vm/vm_mmap.c +++ b/sys/vm/vm_mmap.c @@ -1435,6 +1435,9 @@ vm_mmap_cdev(struct thread *td, vm_size_t objsize, vm_prot_t prot, td->td_ucred); if (obj == NULL) return (EINVAL); + VM_OBJECT_WLOCK(obj); + vm_object_set_flag(obj, OBJ_CDEVH); + VM_OBJECT_WUNLOCK(obj); *objp = obj; *flagsp = flags; return (0); diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index 5933b2c1d4bd..84e56b910809 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -2610,7 +2610,8 @@ vm_object_list_handler(struct sysctl_req *req, bool swap_only) sp = swap_pager_swapped_pages(obj); kvo->kvo_swapped = sp > UINT32_MAX ? UINT32_MAX : sp; } - if (obj->type == OBJT_DEVICE || obj->type == OBJT_MGTDEVICE) { + if ((obj->type == OBJT_DEVICE || obj->type == OBJT_MGTDEVICE) && + (obj->flags & OBJ_CDEVH) != 0) { cdev = obj->un_pager.devp.handle; if (cdev != NULL) { csw = dev_refthread(cdev, &ref); diff --git a/sys/vm/vm_object.h b/sys/vm/vm_object.h index 16ee3544b658..bd71820bed3c 100644 --- a/sys/vm/vm_object.h +++ b/sys/vm/vm_object.h @@ -206,6 +206,7 @@ struct vm_object { #define OBJ_PAGERPRIV2 0x00008000 /* Pager private */ #define OBJ_SYSVSHM 0x00010000 /* SysV SHM */ #define OBJ_POSIXSHM 0x00020000 /* Posix SHM */ +#define OBJ_CDEVH 0x00040000 /* OBJT_DEVICE handle is cdev */ /* * Helpers to perform conversion between vm_object page indexes and offsets.