Closed Bug 945043 Opened 6 years ago Closed 2 years ago

Web Page session lost when change to read SMS message


(Firefox OS Graveyard :: General, defect, P2)



(firefox28 affected, b2g18 affected, b2g-v1.2 affected, b2g-v1.3 affected)

Tracking Status
firefox28 --- affected
b2g18 --- affected
b2g-v1.2 --- affected
b2g-v1.3 --- affected


(Reporter: zrzut01, Unassigned)


(Keywords: perf, Whiteboard: [c=memory p= u= s=][MemShrink:P2])


(1 file)

8.89 MB, application/octet-stream
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 (Beta/Release)
Build ID: 20131112160018

Steps to reproduce:

1. Open City Transport web page to buy monthly ticket
2. Proceed with transaction with specifying transaction details.
3. Redirected to bank web page to proceed with payment.
4. Bank sent back SMS message with Transaction Code.
5. Read SMS message.
6. Back to Web Browser to fill Transaction code from SMS message.

Actual results:

After back to web page got information that transaction has been cancelled (lost session after web page reloaded).

Expected results:

The page shouldn't be reloaded. It is improper behavior that page is reloaded when back to browser from other programme (like SMS one). Now it is and it causes lost session and termination of bank transaction. I had to change to desktop computer to execute the task which makes FirefoxOS useless in context of bank transactions which has to be confirmed by SMS codes.
UPDATE for my bug report:

Hardware: Alcatel One Touch Fire
Software: FirefoxOS Version
software branded for T-mobile Poland 

problem occured on bank transaction page (old 'yellow' version).
This happens with Buri running v1.1 released to the public from partner, as far as I remember.
Michal, do you have any way to investigate on this ? As far as I understood, one needs to have an account at this bank to be able to reproduce this issue.
Flags: needinfo?(mbudzynski)
As far as I remember :sasklacz has an account in there.
Flags: needinfo?(mbudzynski) → needinfo?(owcarnia)
Yes I do. :michalbe do you know if David was able to unlock my Alcatel ?
Flags: needinfo?(owcarnia)
Although this has not been tested on v1.2 and 1.3, it is reproduced on v1.4.
I've checked by b2g-ps that Browser process is terminated when Messages process is started to read an SMS Transaction Code. Then when trying to back to the browser to finish bank transaction the browser is started again and page is reloaded. It causes session data lost and security error on bank transaction page. STR can be reporduced on every little more complex web page (i.e. forum page when writing down a forum post).
I tried this one.
1. Open random website.
2. Go to home screen and open SMS application.
3. Go back to browser.

Result: Website is reloading.

With very lightweight sites it doesn't reloading. The truth is 256 MB is really low.
I might have similar behavior on another set of STR.

1. Reboot device, make sure you have network
2. Fire Browser app
3. Go to
4. Start a speed test

During the speed test, I monitored the output of the kernel via dmesg. On my HTC Desire Z, I see a bunch of process getting killed:
<6>[  195.203277] lowmem: send sigkill to 1449 (Calendar), adj 12, size 6091
<6>[  197.605712] lowmem: send sigkill to 1357 (Built-in Keyboa), adj 12, size 4356
<6>[  198.235992] lowmem: send sigkill to 1468 (Settings), adj 11, size 6100
<6>[  198.803375] lowmem: send sigkill to 1483 (Messages), adj 11, size 5755
<6>[  199.117675] lowmem: send sigkill to 1396 (Homescreen), adj 8, size 5183
<6>[  618.693817] lowmem: send sigkill to 1744 (Usage), adj 11, size 7141
<6>[  619.720031] lowmem: send sigkill to 1521 (Built-in Keyboa), adj 11, size 3402
<6>[  620.730834] lowmem: send sigkill to 1794 ((Preallocated a), adj 10, size 2369
<6>[  622.252990] lowmem: send sigkill to 1571 (Homescreen), adj 8, size 3879
<6>[  943.601898] lowmem: send sigkill to 1901 ((Preallocated a), adj 10, size 5749
<6>[  944.483093] lowmem: send sigkill to 1773 (Browser), adj 2, size 59774

Under some circumstances, just starting a second speed test is enough to have the SpeedOf.Me's process getting killed, and having to reload the tab. In the log above, this is the case at timestamp 944.483093: the browser process of SpeedOf.Me is getting killed.

This is a 512MB RAM device, with about 367MB available to the kernel:
             total         used         free       shared      buffers
Mem:        375916       235864       140052            0         1772
-/+ buffers:             234092       141824
Swap:            0            0            0.
I traced some memory usage on the same HTC Desire Z device while running Speedof.Me:

All applications killed, just started browser and loaded the website:
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> b2g               1200  113740K   77968K   69270K   66144K  /system/b2g/b2g
> Browser           2635   87948K   47696K   34437K   29828K  /system/b2g/plugin-container
> Homescreen        2427   31272K   31272K   18770K   14948K  /system/b2g/plugin-container
> Usage             2560   28672K   28672K   16613K   13056K  /system/b2g/plugin-container
> (Preallocated a   2567   22988K   22988K   12456K    9476K  /system/b2g/plugin-container
>                                            ------   ------  ------
>                                           166224K  140468K  TOTAL

While running a first speed test, roughly at 50% of the test:
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> Browser           2635  151612K  119928K  106642K  102016K  /system/b2g/plugin-container
> b2g               1200  113540K   77768K   69049K   65912K  /system/b2g/b2g
> Homescreen        2427   31268K   31268K   18763K   14944K  /system/b2g/plugin-container
> Usage             2560   28668K   28668K   16608K   13052K  /system/b2g/plugin-container
> (Preallocated a   2567   22984K   22984K   12452K    9472K  /system/b2g/plugin-container
>                                            ------   ------  ------
>                                           238188K  212408K  TOTAL

Still running the same test, at ~80% of completion:
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> Browser           2635  175652K  143968K  141595K  139288K  /system/b2g/plugin-container
> b2g               1200  122512K   86740K   84321K   82000K  /system/b2g/b2g
>                                            ------   ------  ------
>                                           240478K  228124K  TOTAL

A first speed test finished, ~17Mbits detected (quite impossible, this device is only HSDPA Cat10 at best it can get ~14Mbits):
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> Browser           2635  177356K  145672K  142727K  139868K  /system/b2g/plugin-container
> b2g               1200  123564K   87792K   84801K   81924K  /system/b2g/b2g
>                                            ------   ------  ------
>                                           242085K  228620K  TOTAL

Now, we will proceed with a second speed test in the same tab of the Browser.

Second speed test at about 25% of completion:
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> Browser           2635   97908K   83984K   80500K   77112K  /system/b2g/plugin-container
> b2g               1200  108200K   72428K   68874K   65460K  /system/b2g/b2g
>                                            ------   ------  ------
>                                           163932K  149476K  TOTAL

And at 50% of completion:
> APPLICATION        PID      Vss      Rss      Pss      Uss  cmdline
> Browser           2635  161792K  147868K  144384K  140996K  /system/b2g/plugin-container
> b2g               1200  108456K   72684K   69130K   65716K  /system/b2g/b2g
>                                            ------   ------  ------
>                                           228195K  213668K  TOTAL

This second subsequent round gets killed a couple of seconds after, somewhere around 75% completion of the speed test.
With self built kernel and enabled swap file on SD card (512MB) I was able to finish the transaction - execute STR without reloading the bank transaction page. Moreover I was able to change between Messages and Browser multiple times even with partially filled transaction code on the bank transaction page.
Please write to me if you need any more details.
If it's reproducing on 1.1 & 1.4, then I'm pretty sure it's reproducing on 1.2 & 1.3. I doubt we would have a branch-specific bug in this case if it's present on 1.1 & 1.4.
The session being lost via a reload along with the above comments seems to imply that this is likely an OOM.
Component: Gaia::Browser → General
Keywords: perf
Whiteboard: [MemShrink]
Can we get memory reports from, please?
Whiteboard: [MemShrink] → [MemShrink:P2]
(In reply to Nicholas Nethercote [:njn] from comment #14)
> Can we get memory reports from, please?

In what moment you wish to get about_memory? after reload (then after back from Messages to Browser)?
> In what moment you wish to get about_memory?

Preferably just before the browser is killed for using too much memory. I'm not sure exactly which step that is; it might take a few goes to find the right place.
Attached file about_memory reads
I did 3 reads with

0: logged in, browser opened, just before change to Messages
1: just after change to Messages and Browser kill
2: back to the killed Browser process, web page has been reloaded instead read back from memory, Messages killed
Whiteboard: [MemShrink:P2] → [c=memory p= u= s=][MemShrink:P2]
Closing out old Firefox OS specific memshrink bugs.
Closed: 2 years ago
Resolution: --- → WONTFIX
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