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KASAN: stack-out-of-bounds Read in gfs2_file_read_iter

Status: auto-obsoleted due to no activity on 2023/11/25 16:09
Reported-by: syzbot+18dd1af0bdf116e96d36@syzkaller.appspotmail.com
First crash: 371d, last: 357d
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: stack-out-of-bounds Read in gfs2_file_read_iter (2) 102 7h00m 139d 0/3 upstream: reported on 2024/04/21 05:24

Sample crash report:
==================================================================
BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_direct_read fs/gfs2/file.c:854 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_read_iter+0x45b/0xe40 fs/gfs2/file.c:961
Read of size 8 at addr ffffc90005a57d30 by task syz-executor.5/12586

CPU: 1 PID: 12586 Comm: syz-executor.5 Not tainted 5.15.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 should_fault_in_pages fs/gfs2/file.c:784 [inline]
 gfs2_file_direct_read fs/gfs2/file.c:854 [inline]
 gfs2_file_read_iter+0x45b/0xe40 fs/gfs2/file.c:961
 call_read_iter include/linux/fs.h:2097 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0xa9f/0xe10 fs/read_write.c:485
 ksys_read+0x1a2/0x2c0 fs/read_write.c:623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5fdb044ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5fd95c60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f5fdb163f80 RCX: 00007f5fdb044ae9
RDX: 0000000000002020 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f5fdb09047a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5fdb163f80 R15: 00007ffe4270de18
 </TASK>


addr ffffc90005a57d30 is located in stack of task syz-executor.5/12586 at offset 48 in frame:
 vfs_read+0x0/0xe10

this frame has 3 objects:
 [32, 48) 'iov.i'
 [64, 112) 'kiocb.i'
 [144, 184) 'iter.i'

Memory state around the buggy address:
 ffffc90005a57c00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc90005a57c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90005a57d00: f1 f1 f1 f1 00 00 f2 f2 00 00 00 00 00 00 f2 f2
                                     ^
 ffffc90005a57d80: f2 f2 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffffc90005a57e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/16 16:09 linux-5.15.y aff03380bda4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/16 15:30 linux-5.15.y aff03380bda4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/13 19:15 linux-5.15.y aff03380bda4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/13 18:22 linux-5.15.y aff03380bda4 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/11 21:36 linux-5.15.y aff03380bda4 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/11 20:26 linux-5.15.y aff03380bda4 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/09 04:17 linux-5.15.y aff03380bda4 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/07 13:02 linux-5.15.y aff03380bda4 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/07 07:19 linux-5.15.y aff03380bda4 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/06 09:41 linux-5.15.y 8f790700c974 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/05 21:41 linux-5.15.y 8f790700c974 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/05 12:45 linux-5.15.y 8f790700c974 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/03 09:08 linux-5.15.y 8f790700c974 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/02 18:10 linux-5.15.y 8f790700c974 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
2023/09/02 17:16 linux-5.15.y 8f790700c974 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in gfs2_file_read_iter
* Struck through repros no longer work on HEAD.