diff --git a/media/libstagefright/binding/MP4Metadata.cpp b/media/libstagefright/binding/MP4Metadata.cpp
index 7c5b6e2ce591..6edd6d2e6b5b 100644
--- a/media/libstagefright/binding/MP4Metadata.cpp
+++ b/media/libstagefright/binding/MP4Metadata.cpp
@@ -763,8 +763,6 @@ MP4MetadataRust::Init()
     mp4parse_log(true);
   }
 
-  mp4parse_fallible_allocation(true);
-
   mp4parse_status rv = mp4parse_read(mRustParser.get());
   MOZ_LOG(sLog, LogLevel::Debug, ("rust parser returned %d\n", rv));
   Telemetry::Accumulate(Telemetry::MEDIA_RUST_MP4PARSE_SUCCESS,
diff --git a/media/libstagefright/binding/include/mp4parse.h b/media/libstagefright/binding/include/mp4parse.h
index 06062fe67a15..90b1a14b75ac 100644
--- a/media/libstagefright/binding/include/mp4parse.h
+++ b/media/libstagefright/binding/include/mp4parse.h
@@ -24,7 +24,6 @@ typedef enum mp4parse_status {
 	mp4parse_status_EOF = 4,
 	mp4parse_status_IO = 5,
 	mp4parse_status_TABLE_TOO_LARGE = 6,
-	mp4parse_status_OOM = 7,
 } mp4parse_status;
 
 typedef enum mp4parse_track_type {
@@ -119,8 +118,6 @@ void mp4parse_free(mp4parse_parser* parser);
 /// Enable `mp4_parser` log.
 void mp4parse_log(bool enable);
 
-void mp4parse_fallible_allocation(bool enable);
-
 /// Run the `mp4parse_parser*` allocated by `mp4parse_new()` until EOF or error.
 mp4parse_status mp4parse_read(mp4parse_parser* parser);
 
diff --git a/media/libstagefright/binding/mp4parse-cargo.patch b/media/libstagefright/binding/mp4parse-cargo.patch
index 08e5fb16ad9c..c6519ca9879e 100644
--- a/media/libstagefright/binding/mp4parse-cargo.patch
+++ b/media/libstagefright/binding/mp4parse-cargo.patch
@@ -2,7 +2,7 @@ diff --git a/media/libstagefright/binding/mp4parse/Cargo.toml b/media/libstagefr
 index ff9422c..814c4c6 100644
 --- a/media/libstagefright/binding/mp4parse/Cargo.toml
 +++ b/media/libstagefright/binding/mp4parse/Cargo.toml
-@@ -20,20 +20,12 @@ exclude = [
+@@ -20,19 +20,11 @@ exclude = [
  ]
  
 -[badges]
@@ -15,11 +15,9 @@ index ff9422c..814c4c6 100644
 -abort_on_panic = { version = "1.0.0", optional = true }
 -bitreader = { version = "0.3.0" }
 -num-traits = "0.1.37"
--mp4parse_fallible = { path = "../mp4parse_fallible" }
 +byteorder = "1.0.0"
 +bitreader = { version = "0.3.0" }
 +num-traits = "0.1.37"
-+mp4parse_fallible = { path = "../mp4parse_fallible" }
  
  [dev-dependencies]
  test-assembler = "0.1.2"
diff --git a/media/libstagefright/binding/mp4parse/Cargo.toml b/media/libstagefright/binding/mp4parse/Cargo.toml
index 39bed42f2ce4..d954a31e2985 100644
--- a/media/libstagefright/binding/mp4parse/Cargo.toml
+++ b/media/libstagefright/binding/mp4parse/Cargo.toml
@@ -24,7 +24,6 @@ exclude = [
 byteorder = "1.0.0"
 bitreader = { version = "0.3.0" }
 num-traits = "0.1.37"
-mp4parse_fallible = { path = "../mp4parse_fallible" }
 
 [dev-dependencies]
 test-assembler = "0.1.2"
diff --git a/media/libstagefright/binding/mp4parse/src/lib.rs b/media/libstagefright/binding/mp4parse/src/lib.rs
index bff2178bc6ec..e1cf01b3fb4d 100644
--- a/media/libstagefright/binding/mp4parse/src/lib.rs
+++ b/media/libstagefright/binding/mp4parse/src/lib.rs
@@ -11,14 +11,12 @@ extern crate afl;
 extern crate byteorder;
 extern crate bitreader;
 extern crate num_traits;
-extern crate mp4parse_fallible;
 use byteorder::{ReadBytesExt, WriteBytesExt};
 use bitreader::{BitReader, ReadInto};
 use std::io::{Read, Take};
 use std::io::Cursor;
 use std::cmp;
 use num_traits::Num;
-use mp4parse_fallible::FallibleVec;
 
 mod boxes;
 use boxes::{BoxType, FourCC};
@@ -32,20 +30,15 @@ const BUF_SIZE_LIMIT: usize = 1024 * 1024;
 
 // Max table length. Calculating in worth case for one week long video, one
 // frame per table entry in 30 fps.
+#[cfg(target_pointer_width = "64")]
 const TABLE_SIZE_LIMIT: u32 = 30 * 60 * 60 * 24 * 7;
 
+// Reduce max table length if it is in 32 arch for memory problem.
+#[cfg(target_pointer_width = "32")]
+const TABLE_SIZE_LIMIT: u32 = 30 * 60 * 60 * 24;
+
 static DEBUG_MODE: std::sync::atomic::AtomicBool = std::sync::atomic::ATOMIC_BOOL_INIT;
 
-static FALLIBLE_ALLOCATION: std::sync::atomic::AtomicBool = std::sync::atomic::ATOMIC_BOOL_INIT;
-
-pub fn set_fallible_allocation_mode(fallible: bool) {
-    FALLIBLE_ALLOCATION.store(fallible, std::sync::atomic::Ordering::SeqCst);
-}
-
-fn get_fallible_allocation_mode() -> bool {
-    FALLIBLE_ALLOCATION.load(std::sync::atomic::Ordering::Relaxed)
-}
-
 pub fn set_debug_mode(mode: bool) {
     DEBUG_MODE.store(mode, std::sync::atomic::Ordering::SeqCst);
 }
@@ -63,37 +56,6 @@ macro_rules! log {
     )
 }
 
-// TODO: vec_push() and vec_reserve() needs to be replaced when Rust supports
-// fallible memory allocation in raw_vec.
-pub fn vec_push<T>(vec: &mut Vec<T>, val: T) -> std::result::Result<(), ()> {
-    if get_fallible_allocation_mode() {
-        return vec.try_push(val);
-    }
-
-    vec.push(val);
-    Ok(())
-}
-
-pub fn vec_reserve<T>(vec: &mut Vec<T>, size: usize) -> std::result::Result<(), ()> {
-    if get_fallible_allocation_mode() {
-        return vec.try_reserve(size);
-    }
-
-    vec.reserve(size);
-    Ok(())
-}
-
-fn reserve_read_buf(size: usize) -> std::result::Result<Vec<u8>, ()> {
-    if get_fallible_allocation_mode() {
-        let mut buf: Vec<u8> = Vec::new();
-        buf.try_reserve(size)?;
-        unsafe { buf.set_len(size); }
-        return Ok(buf);
-    }
-
-    Ok(vec![0; size])
-}
-
 /// Describes parser failures.
 ///
 /// This enum wraps the standard `io::Error` type, unified with
@@ -112,8 +74,6 @@ pub enum Error {
     NoMoov,
     /// Parse error caused by table size is over limitation.
     TableTooLarge,
-    /// Out of memory
-    OutOfMemory,
 }
 
 impl From<bitreader::BitReaderError> for Error {
@@ -137,12 +97,6 @@ impl From<std::string::FromUtf8Error> for Error {
     }
 }
 
-impl From<()> for Error {
-    fn from(_: ()) -> Error {
-        Error::OutOfMemory
-    }
-}
-
 /// Result shorthand using our Error enum.
 pub type Result<T> = std::result::Result<T, Error>;
 
@@ -735,7 +689,7 @@ fn read_moov<T: Read>(f: &mut BMFFBox<T>, context: &mut MediaContext) -> Result<
             BoxType::TrackBox => {
                 let mut track = Track::new(context.tracks.len());
                 read_trak(&mut b, &mut track)?;
-                vec_push(&mut context.tracks, track)?;
+                context.tracks.push(track);
             }
             BoxType::MovieExtendsBox => {
                 let mvex = read_mvex(&mut b)?;
@@ -745,7 +699,7 @@ fn read_moov<T: Read>(f: &mut BMFFBox<T>, context: &mut MediaContext) -> Result<
             BoxType::ProtectionSystemSpecificHeaderBox => {
                 let pssh = read_pssh(&mut b)?;
                 log!("{:?}", pssh);
-                vec_push(&mut context.psshs, pssh)?;
+                context.psshs.push(pssh);
             }
             _ => skip_box_content(&mut b)?,
         };
@@ -769,7 +723,7 @@ fn read_pssh<T: Read>(src: &mut BMFFBox<T>) -> Result<ProtectionSystemSpecificHe
             let count = be_u32_with_limit(pssh)?;
             for _ in 0..count {
                 let item = read_buf(pssh, 16)?;
-                vec_push(&mut kid, item)?;
+                kid.push(item);
             }
         }
 
@@ -781,7 +735,7 @@ fn read_pssh<T: Read>(src: &mut BMFFBox<T>) -> Result<ProtectionSystemSpecificHe
 
     let mut pssh_box = Vec::new();
     write_be_u32(&mut pssh_box, src.head.size as u32)?;
-    pssh_box.extend_from_slice(b"pssh");
+    pssh_box.append(&mut b"pssh".to_vec());
     pssh_box.append(&mut box_content);
 
     Ok(ProtectionSystemSpecificHeaderBox {
@@ -986,7 +940,7 @@ fn read_ftyp<T: Read>(src: &mut BMFFBox<T>) -> Result<FileTypeBox> {
     let brand_count = bytes_left / 4;
     let mut brands = Vec::new();
     for _ in 0..brand_count {
-        vec_push(&mut brands, From::from(be_u32(src)?))?;
+        brands.push(From::from(be_u32(src)?));
     }
     Ok(FileTypeBox {
         major_brand: From::from(major),
@@ -1095,12 +1049,12 @@ fn read_elst<T: Read>(src: &mut BMFFBox<T>) -> Result<EditListBox> {
         };
         let media_rate_integer = be_i16(src)?;
         let media_rate_fraction = be_i16(src)?;
-        vec_push(&mut edits, Edit {
+        edits.push(Edit {
             segment_duration: segment_duration,
             media_time: media_time,
             media_rate_integer: media_rate_integer,
             media_rate_fraction: media_rate_fraction,
-        })?;
+        })
     }
 
     Ok(EditListBox {
@@ -1156,7 +1110,7 @@ fn read_stco<T: Read>(src: &mut BMFFBox<T>) -> Result<ChunkOffsetBox> {
     let offset_count = be_u32_with_limit(src)?;
     let mut offsets = Vec::new();
     for _ in 0..offset_count {
-        vec_push(&mut offsets, be_u32(src)? as u64)?;
+        offsets.push(be_u32(src)? as u64);
     }
 
     // Padding could be added in some contents.
@@ -1173,7 +1127,7 @@ fn read_co64<T: Read>(src: &mut BMFFBox<T>) -> Result<ChunkOffsetBox> {
     let offset_count = be_u32_with_limit(src)?;
     let mut offsets = Vec::new();
     for _ in 0..offset_count {
-        vec_push(&mut offsets, be_u64(src)?)?;
+        offsets.push(be_u64(src)?);
     }
 
     // Padding could be added in some contents.
@@ -1190,7 +1144,7 @@ fn read_stss<T: Read>(src: &mut BMFFBox<T>) -> Result<SyncSampleBox> {
     let sample_count = be_u32_with_limit(src)?;
     let mut samples = Vec::new();
     for _ in 0..sample_count {
-        vec_push(&mut samples, be_u32(src)?)?;
+        samples.push(be_u32(src)?);
     }
 
     // Padding could be added in some contents.
@@ -1210,11 +1164,11 @@ fn read_stsc<T: Read>(src: &mut BMFFBox<T>) -> Result<SampleToChunkBox> {
         let first_chunk = be_u32(src)?;
         let samples_per_chunk = be_u32_with_limit(src)?;
         let sample_description_index = be_u32(src)?;
-        vec_push(&mut samples, SampleToChunk {
+        samples.push(SampleToChunk {
             first_chunk: first_chunk,
             samples_per_chunk: samples_per_chunk,
             sample_description_index: sample_description_index,
-        })?;
+        });
     }
 
     // Padding could be added in some contents.
@@ -1249,10 +1203,10 @@ fn read_ctts<T: Read>(src: &mut BMFFBox<T>) -> Result<CompositionOffsetBox> {
                 return Err(Error::InvalidData("unsupported version in 'ctts' box"));
             }
         };
-        vec_push(&mut offsets, TimeOffset {
+        offsets.push(TimeOffset {
             sample_count: sample_count,
             time_offset: time_offset,
-        })?;
+        });
     }
 
     skip_box_remain(src)?;
@@ -1270,7 +1224,7 @@ fn read_stsz<T: Read>(src: &mut BMFFBox<T>) -> Result<SampleSizeBox> {
     let mut sample_sizes = Vec::new();
     if sample_size == 0 {
         for _ in 0..sample_count {
-            vec_push(&mut sample_sizes, be_u32(src)?)?;
+            sample_sizes.push(be_u32(src)?);
         }
     }
 
@@ -1291,10 +1245,10 @@ fn read_stts<T: Read>(src: &mut BMFFBox<T>) -> Result<TimeToSampleBox> {
     for _ in 0..sample_count {
         let sample_count = be_u32_with_limit(src)?;
         let sample_delta = be_u32(src)?;
-        vec_push(&mut samples, Sample {
+        samples.push(Sample {
             sample_count: sample_count,
             sample_delta: sample_delta,
-        })?;
+        });
     }
 
     // Padding could be added in some contents.
@@ -1501,7 +1455,7 @@ fn read_ds_descriptor(data: &[u8], esds: &mut ES_Descriptor) -> Result<()> {
     esds.audio_sample_rate = sample_frequency;
     esds.audio_channel_count = Some(channel_counts);
     assert!(esds.decoder_specific_data.is_empty());
-    esds.decoder_specific_data.extend_from_slice(data);
+    esds.decoder_specific_data.extend(data.iter());
 
     Ok(())
 }
@@ -1589,7 +1543,7 @@ fn read_dfla<T: Read>(src: &mut BMFFBox<T>) -> Result<FLACSpecificBox> {
     let mut blocks = Vec::new();
     while src.bytes_left() > 0 {
         let block = read_flac_metadata(src)?;
-        vec_push(&mut blocks, block)?;
+        blocks.push(block);
     }
     // The box must have at least one meta block, and the first block
     // must be the METADATA_BLOCK_STREAMINFO
@@ -1783,7 +1737,7 @@ fn read_video_sample_entry<T: Read>(src: &mut BMFFBox<T>) -> Result<(CodecType,
                 }
                 let sinf = read_sinf(&mut b)?;
                 log!("{:?} (sinf)", sinf);
-                vec_push(&mut protection_info, sinf)?;
+                protection_info.push(sinf);
             }
             _ => {
                 log!("Unsupported video codec, box {:?} found", b.head.name);
@@ -1908,7 +1862,7 @@ fn read_audio_sample_entry<T: Read>(src: &mut BMFFBox<T>) -> Result<(CodecType,
                 let sinf = read_sinf(&mut b)?;
                 log!("{:?} (sinf)", sinf);
                 codec_type = CodecType::EncryptedAudio;
-                vec_push(&mut protection_info, sinf)?;
+                protection_info.push(sinf);
             }
             _ => {
                 log!("Unsupported audio codec, box {:?} found", b.head.name);
@@ -1966,7 +1920,7 @@ fn read_stsd<T: Read>(src: &mut BMFFBox<T>, track: &mut Track) -> Result<SampleD
             } else {
                 log!("** don't know how to handle multiple descriptions **");
             }
-            vec_push(&mut descriptions, description)?;
+            descriptions.push(description);
             check_parser_state!(b.content);
             if descriptions.len() == description_count as usize {
                 break;
@@ -2061,15 +2015,12 @@ fn read_buf<T: ReadBytesExt>(src: &mut T, size: usize) -> Result<Vec<u8>> {
     if size > BUF_SIZE_LIMIT {
         return Err(Error::InvalidData("read_buf size exceeds BUF_SIZE_LIMIT"));
     }
-    if let Ok(mut buf) = reserve_read_buf(size) {
-        let r = src.read(&mut buf)?;
-        if r != size {
-          return Err(Error::InvalidData("failed buffer read"));
-        }
-        return Ok(buf);
+    let mut buf = vec![0; size];
+    let r = src.read(&mut buf)?;
+    if r != size {
+        return Err(Error::InvalidData("failed buffer read"));
     }
-
-    Err(Error::OutOfMemory)
+    Ok(buf)
 }
 
 fn be_i16<T: ReadBytesExt>(src: &mut T) -> Result<i16> {
diff --git a/media/libstagefright/binding/mp4parse_capi/src/lib.rs b/media/libstagefright/binding/mp4parse_capi/src/lib.rs
index 68b0f74c6dce..7c14e6eb4aec 100644
--- a/media/libstagefright/binding/mp4parse_capi/src/lib.rs
+++ b/media/libstagefright/binding/mp4parse_capi/src/lib.rs
@@ -58,7 +58,6 @@ use mp4parse::TrackScaledTime;
 use mp4parse::serialize_opus_header;
 use mp4parse::CodecType;
 use mp4parse::Track;
-use mp4parse::vec_push;
 
 #[allow(non_camel_case_types)]
 #[repr(C)]
@@ -71,7 +70,6 @@ pub enum mp4parse_status {
     EOF = 4,
     IO = 5,
     TABLE_TOO_LARGE = 6,
-    OOM = 7,
 }
 
 #[allow(non_camel_case_types)]
@@ -310,11 +308,6 @@ pub unsafe extern fn mp4parse_log(enable: bool) {
     mp4parse::set_debug_mode(enable);
 }
 
-#[no_mangle]
-pub unsafe extern fn mp4parse_fallible_allocation(enable: bool) {
-    mp4parse::set_fallible_allocation_mode(enable);
-}
-
 /// Run the `mp4parse_parser*` allocated by `mp4parse_new()` until EOF or error.
 #[no_mangle]
 pub unsafe extern fn mp4parse_read(parser: *mut mp4parse_parser) -> mp4parse_status {
@@ -323,8 +316,8 @@ pub unsafe extern fn mp4parse_read(parser: *mut mp4parse_parser) -> mp4parse_sta
         return mp4parse_status::BAD_ARG;
     }
 
-    let context = (*parser).context_mut();
-    let io = (*parser).io_mut();
+    let mut context = (*parser).context_mut();
+    let mut io = (*parser).io_mut();
 
     let r = read_mp4(io, context);
     match r {
@@ -345,7 +338,6 @@ pub unsafe extern fn mp4parse_read(parser: *mut mp4parse_parser) -> mp4parse_sta
             mp4parse_status::IO
         },
         Err(Error::TableTooLarge) => mp4parse_status::TABLE_TOO_LARGE,
-        Err(Error::OutOfMemory) => mp4parse_status::OOM,
     }
 }
 
@@ -908,17 +900,16 @@ fn create_sample_table(track: &Track, track_offset_time: i64) -> Option<Vec<mp4p
             }
             cur_position = end_offset;
 
-            let res = vec_push(&mut sample_table, mp4parse_indice {
-                start_offset: start_offset,
-                end_offset: end_offset,
-                start_composition: 0,
-                end_composition: 0,
-                start_decode: 0,
-                sync: !has_sync_table,
-            });
-            if res.is_err() {
-                return None;
-            }
+            sample_table.push(
+                mp4parse_indice {
+                    start_offset: start_offset,
+                    end_offset: end_offset,
+                    start_composition: 0,
+                    end_composition: 0,
+                    start_decode: 0,
+                    sync: !has_sync_table,
+                }
+            );
         }
     }
 
@@ -986,13 +977,12 @@ fn create_sample_table(track: &Track, track_offset_time: i64) -> Option<Vec<mp4p
     //
     // Composition end time is not in specification. However, gecko needs it, so we need to
     // calculate to correct the composition end time.
-    if sample_table.len() > 0 {
+    if track.ctts.is_some() {
         // Create an index table refers to sample_table and sorted by start_composisiton time.
         let mut sort_table = Vec::new();
+        sort_table.reserve(sample_table.len());
         for i in 0 .. sample_table.len() {
-            if vec_push(&mut sort_table, i).is_err() {
-                return None;
-            }
+            sort_table.push(i);
         }
 
         sort_table.sort_by_key(|i| {
@@ -1126,7 +1116,7 @@ extern fn error_read(_: *mut u8, _: usize, _: *mut std::os::raw::c_void) -> isiz
 
 #[cfg(test)]
 extern fn valid_read(buf: *mut u8, size: usize, userdata: *mut std::os::raw::c_void) -> isize {
-    let input: &mut std::fs::File = unsafe { &mut *(userdata as *mut _) };
+    let mut input: &mut std::fs::File = unsafe { &mut *(userdata as *mut _) };
 
     let mut buf = unsafe { std::slice::from_raw_parts_mut(buf, size) };
     match input.read(&mut buf) {
@@ -1290,8 +1280,6 @@ fn get_track_count_poisoned_parser() {
         let mut count: u32 = 0;
         let rv = mp4parse_get_track_count(parser, &mut count);
         assert_eq!(rv, mp4parse_status::BAD_ARG);
-
-        mp4parse_free(parser);
     }
 }
 
diff --git a/media/libstagefright/binding/mp4parse_fallible/Cargo.toml b/media/libstagefright/binding/mp4parse_fallible/Cargo.toml
deleted file mode 100644
index 01ed4d1b316a..000000000000
--- a/media/libstagefright/binding/mp4parse_fallible/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "mp4parse_fallible"
-version = "0.0.1"
-authors = ["The Servo Project Developers"]
-license = "MPL-2.0"
-publish = false
-
-[lib]
-name = "mp4parse_fallible"
-path = "lib.rs"
diff --git a/media/libstagefright/binding/mp4parse_fallible/README b/media/libstagefright/binding/mp4parse_fallible/README
deleted file mode 100644
index 9660add19a0f..000000000000
--- a/media/libstagefright/binding/mp4parse_fallible/README
+++ /dev/null
@@ -1,2 +0,0 @@
-This is from https://github.com/servo/servo/tree/master/components/fallible
-with modificaion for mp4 demuxer.
diff --git a/media/libstagefright/binding/mp4parse_fallible/lib.rs b/media/libstagefright/binding/mp4parse_fallible/lib.rs
deleted file mode 100644
index 596b9085eb6a..000000000000
--- a/media/libstagefright/binding/mp4parse_fallible/lib.rs
+++ /dev/null
@@ -1,92 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use std::mem;
-use std::vec::Vec;
-
-extern "C" {
-    fn realloc(ptr: *mut u8, bytes: usize) -> *mut u8;
-    fn malloc(bytes: usize) -> *mut u8;
-}
-
-pub trait FallibleVec<T> {
-    /// Append |val| to the end of |vec|.  Returns Ok(()) on success,
-    /// Err(()) if it fails, which can only be due to lack of memory.
-    fn try_push(&mut self, value: T) -> Result<(), ()>;
-
-    /// Expand the vector size. Return Ok(()) on success, Err(()) if it
-    /// fails.
-    fn try_reserve(&mut self, new_cap: usize) -> Result<(), ()>;
-}
-
-/////////////////////////////////////////////////////////////////
-// Vec
-
-impl<T> FallibleVec<T> for Vec<T> {
-    #[inline]
-    fn try_push(&mut self, val: T) -> Result<(), ()> {
-        if self.capacity() == self.len() {
-            let old_cap: usize = self.capacity();
-            let new_cap: usize
-                = if old_cap == 0 { 4 } else { old_cap.checked_mul(2).ok_or(()) ? };
-
-            try_extend_vec(self, new_cap)?;
-            debug_assert!(self.capacity() > self.len());
-        }
-        self.push(val);
-        Ok(())
-    }
-
-    #[inline]
-    fn try_reserve(&mut self, cap: usize) -> Result<(), ()> {
-        let new_cap = cap + self.capacity();
-        try_extend_vec(self, new_cap)?;
-        debug_assert!(self.capacity() == new_cap);
-        Ok(())
-    }
-}
-
-#[inline(never)]
-#[cold]
-fn try_extend_vec<T>(vec: &mut Vec<T>, new_cap: usize) -> Result<(), ()> {
-    let old_ptr = vec.as_mut_ptr();
-    let old_len = vec.len();
-
-    let old_cap: usize = vec.capacity();
-
-    if old_cap > new_cap {
-        return Ok(());
-    }
-
-    let new_size_bytes
-        = new_cap.checked_mul(mem::size_of::<T>()).ok_or(()) ? ;
-
-    let new_ptr = unsafe {
-        if old_cap == 0 {
-            malloc(new_size_bytes)
-        } else {
-            realloc(old_ptr as *mut u8, new_size_bytes)
-        }
-    };
-
-    if new_ptr.is_null() {
-        return Err(());
-    }
-
-    let new_vec = unsafe {
-        Vec::from_raw_parts(new_ptr as *mut T, old_len, new_cap)
-    };
-
-    mem::forget(mem::replace(vec, new_vec));
-    Ok(())
-}
-
-#[test]
-fn oom_test() {
-    let mut vec: Vec<char> = Vec::new();
-    match vec.try_reserve(std::usize::MAX) {
-        Ok(_) => panic!("it should be OOM"),
-        _ => (),
-    }
-}
diff --git a/media/libstagefright/binding/update-rust.sh b/media/libstagefright/binding/update-rust.sh
index d656d78f5402..e3031bfe260b 100755
--- a/media/libstagefright/binding/update-rust.sh
+++ b/media/libstagefright/binding/update-rust.sh
@@ -2,7 +2,7 @@
 # Script to update mp4parse-rust sources to latest upstream
 
 # Default version.
-VER=759cf90957b1fd5a01632b1aa90cead16c26d0db
+VER=81260ded506dce968716720e10544c510f37d222
 
 # Accept version or commit from the command line.
 if test -n "$1"; then
@@ -38,9 +38,6 @@ cp _upstream/mp4parse/mp4parse_capi/Cargo.toml mp4parse_capi/
 cp _upstream/mp4parse/mp4parse_capi/build.rs mp4parse_capi/
 cp _upstream/mp4parse/mp4parse_capi/include/mp4parse.h include/
 cp _upstream/mp4parse/mp4parse_capi/src/*.rs mp4parse_capi/src/
-rm -rf mp4parse_fallible
-mkdir -p mp4parse_fallible
-cp _upstream/mp4parse/mp4parse_fallible/* mp4parse_fallible/
 
 echo "Applying patches..."
 patch -p4 < mp4parse-cargo.patch
diff --git a/toolkit/library/gtest/rust/Cargo.lock b/toolkit/library/gtest/rust/Cargo.lock
index 1419a6962f36..1dfd27e5edc0 100644
--- a/toolkit/library/gtest/rust/Cargo.lock
+++ b/toolkit/library/gtest/rust/Cargo.lock
@@ -802,7 +802,6 @@ version = "0.8.0"
 dependencies = [
  "bitreader 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mp4parse_fallible 0.0.1",
  "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -819,10 +818,6 @@ dependencies = [
  "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "mp4parse_fallible"
-version = "0.0.1"
-
 [[package]]
 name = "net2"
 version = "0.2.31"
diff --git a/toolkit/library/rust/Cargo.lock b/toolkit/library/rust/Cargo.lock
index ed8fb9658402..dc2386d3dd41 100644
--- a/toolkit/library/rust/Cargo.lock
+++ b/toolkit/library/rust/Cargo.lock
@@ -800,7 +800,6 @@ version = "0.8.0"
 dependencies = [
  "bitreader 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mp4parse_fallible 0.0.1",
  "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -813,10 +812,6 @@ dependencies = [
  "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "mp4parse_fallible"
-version = "0.0.1"
-
 [[package]]
 name = "net2"
 version = "0.2.31"