Messages in this thread | | | Date | Mon, 29 Aug 2022 01:40:36 -0700 | Subject | Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tty_ldisc_receive_buf | From | syzbot <> |
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> #syz dup: BUG: unable to handle kernel NULL pointer dereference in
can't find the dup bug
> gsmld_receive_buf > > On 24. 08. 22, 18:35, syzbot wrote: >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: 1c23f9e627a7 Linux 6.0-rc2 >> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci >> console output: https://syzkaller.appspot.com/x/log.txt?x=177ac367080000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7 >> dashboard link: https://syzkaller.appspot.com/bug?extid=be4b95faeb7a9073bb88 >> compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 >> userspace arch: arm64 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1701758d080000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17473aad080000 >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+be4b95faeb7a9073bb88@syzkaller.appspotmail.com >> >> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 >> Mem abort info: >> ESR = 0x0000000086000006 >> EC = 0x21: IABT (current EL), IL = 32 bits >> SET = 0, FnV = 0 >> EA = 0, S1PTW = 0 >> FSC = 0x06: level 2 translation fault >> user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b44f000 >> [0000000000000000] pgd=080000010b5f3003, p4d=080000010b5f3003, pud=080000010b1ce003, pmd=0000000000000000 >> Internal error: Oops: 86000006 [#1] PREEMPT SMP >> Modules linked in: >> CPU: 1 PID: 28 Comm: kworker/u4:1 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022 >> Workqueue: events_unbound flush_to_ldisc >> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) >> pc : 0x0 >> lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861 >> sp : ffff80000f603c30 >> x29: ffff80000f603c40 x28: 0000000000000000 x27: 00000000000003d9 >> x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000 >> x23: ffff80000d681e40 x22: ffff0000c929b800 x21: 0000000000000000 >> x20: ffff80000c205988 x19: ffff0000c91cf446 x18: ffff80000d2dec40 >> x17: 0000000000000008 x16: 0000000000000000 x15: 0000000000000000 >> x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78 >> x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04 >> x8 : 0000000000000000 x7 : ffff8000098dac3c x6 : 0000000000000000 >> x5 : 0000000000000000 x4 : 0000000000000001 x3 : 00000000000003da >> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c929b800 >> Call trace: >> 0x0 >> tty_ldisc_receive_buf+0xb8/0xcc drivers/tty/tty_buffer.c:461 >> tty_port_default_receive_buf+0x54/0x8c drivers/tty/tty_port.c:39 >> receive_buf drivers/tty/tty_buffer.c:511 [inline] >> flush_to_ldisc+0x150/0x358 drivers/tty/tty_buffer.c:561 >> process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 >> worker_thread+0x340/0x610 kernel/workqueue.c:2436 >> kthread+0x12c/0x158 kernel/kthread.c:376 >> ret_from_fork+0x10/0x20 >> Code: bad PC value >> ---[ end trace 0000000000000000 ]--- >> >> >> --- >> This report is generated by a bot. It may contain errors. >> See https://goo.gl/tpsmEJ for more information about syzbot. >> syzbot engineers can be reached at syzkaller@googlegroups.com. >> >> syzbot will keep track of this issue. See: >> https://goo.gl/tpsmEJ#status for how to communicate with syzbot. >> syzbot can test patches for this issue, for details see: >> https://goo.gl/tpsmEJ#testing-patches > > -- > js > suse labs > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/d0188e1d-374d-5256-7c15-f91989195ce2%40kernel.org.
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