Messages in this thread | | | Date | Tue, 16 Aug 2022 01:39:22 -0700 | Subject | [syzbot] upstream boot error: BUG: unable to handle kernel paging request in get_kobj_path_length | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 4a9350597aff Merge tag 'sound-fix-6.0-rc1' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10814197080000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d647c9572405910 dashboard link: https://syzkaller.appspot.com/bug?extid=0c48c24994617c1e1c7a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0c48c24994617c1e1c7a@syzkaller.appspotmail.com
BUG: unable to handle page fault for address: ffffffff00007c61 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD bc8f067 P4D bc8f067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 2973 Comm: udevadm Not tainted 5.19.0-syzkaller-14090-g4a9350597aff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:strlen+0x2c/0x90 lib/string.c:487 Code: 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 48 <80> 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 RSP: 0018:ffffc90003067ad8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88801c063000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff84204670 RDI: ffffffff00007c61 RBP: ffffffff00007c61 R08: 0000000000002000 R09: 0000000000000dc0 R10: 0000000080000000 R11: 000000000008c07c R12: 0000000000000001 R13: dffffc0000000000 R14: 00000000fffffffe R15: ffff8880170c2000 FS: 00007f2a81ab9840(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff00007c61 CR3: 000000007c7ce000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __fortify_strlen include/linux/fortify-string.h:141 [inline] get_kobj_path_length+0x28/0x90 lib/kobject.c:109 kobject_get_path+0x1b/0x70 lib/kobject.c:144 kobject_uevent_env+0x254/0x1640 lib/kobject_uevent.c:529 kobject_synth_uevent+0x701/0x850 lib/kobject_uevent.c:208 uevent_store+0x42/0x90 drivers/base/bus.c:581 drv_attr_store+0x6d/0xa0 drivers/base/bus.c:77 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x3f8/0x610 fs/kernfs/file.c:354 call_write_iter include/linux/fs.h:2192 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x9e9/0xdd0 fs/read_write.c:578 ksys_write+0x127/0x250 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2a817259a3 Code: 8b 15 d9 f4 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007fff9a55acc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fff9a55bf41 RCX: 00007f2a817259a3 RDX: 0000000000000003 RSI: 00007fff9a55bf41 RDI: 0000000000000003 RBP: 00005647bb783e80 R08: 0000000000000000 R09: 00007f2a817f5a60 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007fff9a55acd8 R14: 0000000000000000 R15: 00005647bb1660b4 </TASK> Modules linked in: CR2: ffffffff00007c61 ---[ end trace 0000000000000000 ]--- RIP: 0010:strlen+0x2c/0x90 lib/string.c:487 Code: 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 48 <80> 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 RSP: 0018:ffffc90003067ad8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88801c063000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff84204670 RDI: ffffffff00007c61 RBP: ffffffff00007c61 R08: 0000000000002000 R09: 0000000000000dc0 R10: 0000000080000000 R11: 000000000008c07c R12: 0000000000000001 R13: dffffc0000000000 R14: 00000000fffffffe R15: ffff8880170c2000 FS: 00007f2a81ab9840(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff00007c61 CR3: 000000007c7ce000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 55 push %rbp 5: 48 89 fd mov %rdi,%rbp 8: 48 c1 ea 03 shr $0x3,%rdx c: 53 push %rbx d: 48 83 ec 08 sub $0x8,%rsp 11: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 15: 48 89 fa mov %rdi,%rdx 18: 83 e2 07 and $0x7,%edx 1b: 38 d0 cmp %dl,%al 1d: 7f 04 jg 0x23 1f: 84 c0 test %al,%al 21: 75 48 jne 0x6b * 23: 80 7d 00 00 cmpb $0x0,0x0(%rbp) <-- trapping instruction 27: 74 39 je 0x62 29: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 30: fc ff df 33: 48 89 e8 mov %rbp,%rax 36: 48 rex.W 37: 83 .byte 0x83 38: c0 .byte 0xc0
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