Messages in this thread |  | | From | devnull@spaans ... | Date | Sun, 20 Aug 2000 04:26:58 -0400 | Subject | Updated Linux 2.4 issues page |
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OK, here's the latest Linux 2.4 issues/bug list, to celebrate the rebirth of the linux-kernel list. :-)
As always, please let me know if there are any corrections that need to be made to this list, and remember that the version of at the web page http://linux24.sourceforge.net may be more recent than this e-mail message....
Thanks!!
- Ted
Linux 2.4 Status/TODO Page This list is almost always out of date, by definition, since kernel development moves so quickly. I try to keep it as up to date as possible, though. Please send updates to tytso@mit.edu. Every few days or so, I periodically send updated versions of this list to the linux-kernel list, but you should consult http://linux24.sourceforge.net to get the latest information. Last modified: [tytso:20000820.0315EDT] Hopefully up to date as of: test7-pre5 1. Should Be Fixed (Confirmation Wanted)
* Fbcon races (cursor problems when running continual streaming output mixed with printk + races when switching from X while doing continuous rapid printing --- Alan) 2. Capable Of Corrupting Your FS
* Use PCI DMA by default in IDE is unsafe (must not do so on via VPx, x < 3) (requires chipset tuning to be enabled according to Andre Hedrick --- we need to turn this on by default -- TYT) * Fix the OOPS in usb-storage from the error-recovery handler. (reported by Matthew Dharm) * Innd data corruption, probably caused by bug in filemap.c? (Rik van Riel) 3. Security
* Fix module remove race bug (still to be done: TTY, ldisc, I2C, video_device - Al Viro) (Rogier Wolff will handle ATM) (ipchains modules -- Rusty) 4. Boot Time Failures
* Use PCI DMA 'lost interrupt' problem with some hw [which ?] (NEC Versa LX with PIIX tuning) * HT6560/UMC8672 ide sets up stuff too early (before region stuff can be done) * Crashes on boot on some Compaqs ? (may be fixed) * Boot hangs on a range of Dell docking stations (Latitude) + Almost certainly related: PCI code doesn't see devices behind DECchip 21150 PCI bridges (used in Dell Latitude). Reported by Simon Trimmer . + Derek Fawcus at Cisco reports similar problems with Toshiba Tecra 8000 attached to the DeskStation V+ docking station. (once again, caused by bridge returning 0 when reading the I/O base/limit and Memory base/limit registers which confuses the new PCI resource code). * Some Ultra-I sbus sparc64 systems fail to boot since 2.4.0-test3, may be due to specific memory configurations. * IBM Thinkpad 390 won't boot since 2.3.11 (See Decklin Foster for more info) 5. Compile errors
* netfilter doesn't compile correctly (test7-pre3, reported by Pau Aliagas) * If all the ISO NLS's are modules, there can be an undefined ref to CONFIG_NLS_DEFAULT in inode.c (Dale Amon) 6. In Progress
* Finish I2O merge (Intel/Alan) * Restore O_SYNC functionality (Stephen) - core code and ext2 done * Fix all remaining PCI code to use pci_enable_device (mostly done) * Fix, um, interesting races around dup2() and friends. (Al Viro) * Finish the audit/code review of the code dealing with descriptor tables. (Al Viro) * NCR5380 isnt smp safe (Frank Davis) * DMFE is not SMP safe (Frank Davis) * Audit all char and block drivers to ensure they are safe with the 2.3 locking - a lot of them are not especially on the read()/write() path. (Frank Davis) 7. Obvious Projects For People (well if you have the hardware..)
* Make syncppp use new ppp code * Fix SPX socket code 8. Fix Exists But Isnt Merged
* Update SGI VisWS to new-style IRQ handling (Ingo) * Support MP table above 1Gig (Ingo) * Dont panic on boot when meeting HP boxes with wacked APIC table numbering (AC) * Scheduler bugs in RT (Dimitris) * AIC7xxx doesnt work non PCI ? (Doug says OK, new version due anyway) * Fix boards with different TSC per CPU and kill TSC use on them * Floppy last block cache flush error * PPC-specific: won't boot on 601 CPU's (powermac) (Andreas Tobler; Paul Mackerras has fix in PPC tree) * IRDA fixes (patches from Russell King sent to Linus and DAG) + IRDA calls get_random_bytes before random is set up + Infinite loop in IrDA parameter code + Device name in /proc/net/irda/irias is not updated when /proc/sys/net/irda/devname is written + IrDA Discovery slot allocation is not random * Splitting a posix lock causes an infinite loop (Stephen Rothwell) * Symbol clashes from ppp and irda compression code (Arjan van de Ven) 9. To Do
* Check all devices use resources properly (Everyone now has to use request_region and check the return since we no longer single thread driver inits in all module cases. Also memory regions are now requestable and a lot of old drivers dont know this yet. -- Alan Cox) * Tulip hang on rmmod/crashes sometimes * Devfs races (mostly done - Al Viro) * Fix further NFS races (Al Viro) * Test other file systems on write * Fix mount failures due to copy_* user mishandling * Check all file systems are either LFS compliant or error large files * Issue with notifiers that try to deregister themselves? (lnz; notifier locking change by Garzik should backed out, according to Jeff) * Mount of new fs over existing mointpoint should return an error unless forced (Andrew McNabb, Alan Cox) * Kernel build has race conditions when building modversions.h (Mikael Pettersson) * Misc locking problems + drivers/pcmcia/ds.c: ds_read & ds_write. SMP locks are missing, on UP the sleep_on() use is unsafe. + drivers/usb/*.c o unsafe sleep_on in ibmcam and ov511 drivers o usbpl_{read,write}(): on UP concurrent read/write operations could corrupt the urb structures if copy_to_user sleeps, on SMP it's worse. + do_execve (Al Viro, reported by Manfred) + fix the quota races (Al Viro) + complete the ext2 races fixes (truncate) (Al Viro) + fix the UFS, minixfs and sysvfs SMP races(the latter couple is broken as ext2 was, UFS is _completely_ broken; eats filesystems) (Al Viro) * Fix sysinfo interface so it is binary compatible with 2.2.x (i.e. mem_unit=1), except when memory >= 4Gb (Erik Andersen) * SCSI CD-ROM doesn't work on filesystems with < 2kb block size (Jens Axboe will fix) * Audit list of drivers that dereference ioremap's return (Abramo Bagnara) * 2.4.0-test2 breaks the behaviour of the ether=0,0,eth1 boot parameter (dwguest) * Writing to tapes > 2.4G causes tar to fail with EIO (using 2.4.0-test7-pre5; it works under 2.4.0-test1-ac18 --- Tigran Aivazian) * USB Pegasus driver explodes on disconnect (lots of printk and/or OOPS spewage to the console. David Ford) 10. To Do But Non Showstopper
* Go through as 2.4pre kicks in and figure what we should mark obsolete for the final 2.4 (i.e. XT hard disk support?) * Union mount (Al Viro) * Per Process rtsigio limit * iget abuse in knfsd * Some people report 2.3.x serial problems * ISAPnP IRQ handling failing on SB1000 + resource handling bug * Parallel ports should set SA_SHIRQ if PCI (eg in Plip) * Devfs compiled in but not mounted causes crap for ->mnt_devname of root (Al Viro) * PCMCIA/Cardbus hangs (Basically unusable - Hinds pcmcia code is reliable) + PCMCIA crashes on unloading pci_socket * RTL 8139 cards sometimes stop responding. Both drivers don't handle this quite good enough yet. (reported by Rogier Wolff) * ATM phy-chip-driver interface change for Firestream ATM card (Rogier Wolff) 11. To Check
* Check O_APPEND atomicity bug fixing is complete * Protection on i_size (sct) [Al Viro mostly done] * Mikulas claims we need to fix the getblk/mark_buffer_uptodate thing for 2.3.x as well * Network block device seems broken by block device changes * VFS?VM - mmap/write deadlock (demo code seems to show lock is there) * kiobuf seperate lock functions/bounce/page_address fixes * Fix routing by fwmark * rw semaphores on inodes to fix read/truncate races ? [Probably fixed] * Not all device drivers are safe now the write inode lock isnt taken on write * Multiwrite IDE breaks on a disk error [minor issue at best] (hopefully fixed) * ACPI/APM suspend issue - IDE related stuff ? (requires full taskfile support that was vetoed by Linus) * NFS bugs are fixed * Chase reports of SMB not working * Some AWE cards are not being found by ISAPnP ?? * SHM segments not always being detached and destroyed right ? (problem reported by Lincoln Dale) * RAM disk contents vanishing on cramfs (block change) and bforget cases * ACPI hangs on boot for some systems (Are there any cases left ?) * Disappointing performance of Software Raid, esp. write performance (reported by Nils Rennebarth) * List of potential problems found by Stanford students using g++ hacks: + Andy Chou's list of mismatched spinlocks and interrupts/bh enable/disable. + Seth Andrew Hallem's list potentially sleeping functions called with interrupts off or spinlocks held. + Dawson Engler's list of potential kmalloc/kfree bugs * Potential races in file locking code (Christian Ehrhardt) + locks_verify_area checks the wrong range if O_APPEND is set and the current file position is not at the end of the file. + dito if the file position changes between the call to locks_verify_area and the actual read/write (requires a shared file pointer, an attacker can use this to circumvent virtually any mandatory lock). + active writes should prevent anyone from getting mandatory locks for the area beeing written. + active reads should prevent anyone from getting mandatory write locks for the area beeing read. * Possible ppp problem (fail to connect; may be user error; reported by Matt Spong; claims worked on 2.3.40) 12. Probably Post 2.4
* per super block write_super needs an async flag * addres_space needs a VM pressure/flush callback (Ingo) * per file_op rw_kiovec * rw sempahores on page faults (mmap_sem) (Currently protected by mmap_sem) _________________________________________________________________ Fixed
* Incredibly slow loopback tcp bug (believed fixed about 2.3.48) * COMX series WAN now merged * VM needs rebalancing or we have a bad leak * SHM works chroot * SHM back compatibility * Intel i960 problems with I2O * Symbol clashes and other mess from _three_ copies of zlib! * PCI buffer overruns * Shared memory changes change the API breaking applications (eg gimp) * Finish softnet driver port over and cleanups * via rhine oopses under load ? * SCSI generic driver crashes controllers (need to pass PCI_DIR_UNKNOWN..) * UMSDOS fixups resync (not quite done) * Make NTFS sort of work * Any user can crash FAT fs code with ftruncate * AFFS fixups * Directory race fix for UFS * Security holes in execve() * Lan Media WAN update for 2.3 * Get the Emu10K merged * Paride seems to need fixes for the block changes yet * Kernel corrupts fs and gs in some situations (Ulrich has demo code) * 1.07 AMI MegaRAID * Merge 2.2.15 changes (Alan) * Get RAID 0.90 in (Ingo) * S/390 Merge * NFS DoS fix (security) * Fix Space.c duplicate string/write to constants * Elevator and block handling queue change errors are all sorted * Make sure all drivers return 1 from their __setup functions (Done ?) * Enhanced disk statistics * Complete vfsmount merge (Al Viro) * Merge removed-buf-open directory stuff into VFS (Al Viro) * Problems with ip autoconfig according to Zaitcev * NFS causes dup kmem_create on reload (Trond) * vmalloc(GFP_DMA) is needed for DMA drivers (Ingo) * TLB flush should use highest priority (Ingo) * SMP affinity code creates multiple dirs with the same name (Ingo) * Set SMP affinity mask to actual cpu online mask (needed for some boards) (Ingo) * heavy swapping corrupts ptes (believed so) * pci_set_master forces a 64 latency on low latency setting devices.Some boards require all cards have latency <= 32 * msync fails on NFS (probably fixed anyway) * Find out what has ruined disk I/O throughput. (mostly) * PIII FXSAVE/FXRESTORE support * The netdev name changing stuff broke GRE * put_user is broken for i386 machines (security) - sem stuff may be wrong too * BusLogic crashes when you cat /proc/scsi/BusLogic/0 (Robert de Vries) * Finish sorting out VM balancing (Rik Van Riel, Juan Quintela et al) * Fix eth= command line * 8139 + bridging fails * RtSig limit handling bug * Signals leak kernel memory (security) [FIX in ac tree] * TTY and N_HDLC layer called poll_wait twice per fd and corrupt memory * ATM layer calls poll_wait twice per fd and corrupts memory * Random calls poll_wait twice per fd and corrupts memory * PCI sound calls poll_wait twice per fd and corrupts memory * sbus audio calls poll_wait twice per fd and corrupts memory * IBM MCA driver breaks on Device_Inquiry at boot * SHM code corrupts memory (Russell) * Linux sends a 1K buffer with SCSI inquiries. The ANSI-SCSI limit is 255. * Linux uses TEST_UNIT_READY to chck for device presence on a PUN/LUN. The INQUIRY is the only valid test allowed by the spec. * truncate_inode_pages does unsafe page cache operations * Fix the ptrace code to be back compatible and add a new PTRACE call set for getting the PIII extra registers * EPIC100 fixes * Tlan and Epic100 crash under load * Fix hpfs_unlink (Al Viro) * exec loader permissions * Locking on getcwd * E820 memory setup causes crashes/corruption on some laptops[**VERY NASTY**] (fixed in test5) * Debian report that the gcc 2.95 possibly miscompiles fault.c or mm/remap.c (Perl script available from Arjan) (fixed in test2 or 3) * Dcache threading (Al Viro) * Sockfs races (removing NULL ->i_sb stuf) (Al Viro) * Module remove race bug (done: anything with file_operations, fb stuff, procfs stuff - Al Viro) * DEFXX driver appears broken (reported fixed by Jeff Garzik) * Some FB drivers check the A000 area and find it busy then bomb out (checked and fixed, reported by Jeff Garzik) * Stick lock_kernel() calls around OSS driver with issues to hard to fix nicely for 2.4 itself (Alan, fixed) * Merge the current Compaq RAID driver into 2.4 (fixed, reported by thomas.hiller@sap.com) * mount crashes on Alpha platforms (fixed, reported by Thorsten Kranzkowski) * IDE fails on some VIA boards (eg the i-opener) (reported fixed by Konrad Stepien) * access_process_mm oops/lockup if task->mm changes (Manfred) [user can cause deliberately] * PCMCIA IRQ routing should now be fixed modulo ISA cards and bios doesn't tell us that an IRQ is ISA-only (Martin Mares) * TB Multisound driver hasnt been updated for new isa I/O totally. (reported fixed by John Coiner; see http://atv.ne.mediaone.net/linux-multisound) * yenta (PCMCIA) and pci_socket modules have mutual dependency (cardbus_register, yenta_operations) (test5, worked in test3) (reported fixed by Erik Mouw) * Keyboard/mouse problems (should be fixed?) * Loop device hangs (Peter Enderborg can duplicate by writing large file to dosfs mounted via loop device; Steve Dodd reports deadlock issues; Linus says fixed in test6) * Floppy driver broken by VFS changes. Other drivers may be too (Stuff gets called after _close now - unload race possibly too; should be fixed in test6) * OSS module remove races (fixed by Christoph Hellwig) * Merge the 2.2 ServeRAID driver into 2.4 (Christoph Hellwig) * AHA27xx is broken (maybe 28xx too) (reported fixed by Doug Ledford) * Merge the network fixes (DaveM) * Finish 64bit vfs merges (lockf64 and friends missing -- willy?) (Andreas Jaeger reports that lockf64 has been added for Intel and Alpha; other architectures may not be done, but if not, they won't build :-) * Can't compile CONFIG_IBMTR and CONFIG_PCMCIA_IBMTR in kernel at once; kernel link failes (rasmus; fixed in a kludgy way by not allowing the combination by arjan) * Merge the RIO driver * Potential deadlock in EMU10K driver when running SMP (orre@nada.kth.se, Alan) Probably Hardware Bugs
* Data corruption on IDE disks (Generic PCI DMA and SiS support Steven Walter) (sounds like PCChips #M599LMR motherboard doesn't disable UDMA when a non-UDMA cable is used. If you disable UDMA in the BIOS, then there is no problem. hardware bug?) * AHA29xx driver appears to stomp other cards (may be BIOS; probably motherboard has assigned to small of a range to a card, so that it's overlapping with some other card -- Doug Ledford) * USB hangs on APM suspend on some machines (fixed more most; Alan has one still that fails but the BIOS has 'issues') - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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