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[syzbot] [fs?] KMSAN: kernel-infoleak in sys_name_to_handle_at (2) | 0 (1) | 2023/04/03 06:23 |
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Title | Replies (including bot) | Last reply |
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[syzbot] [fs?] KMSAN: kernel-infoleak in sys_name_to_handle_at (2) | 0 (1) | 2023/04/03 06:23 |
loop1: detected capacity change from 0 to 256 ===================================================== BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:109 [inline] __se_sys_name_to_handle_at+0x7be/0x8f0 fs/fhandle.c:93 __ia32_sys_name_to_handle_at+0xe3/0x150 fs/fhandle.c:93 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716 slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] do_sys_name_to_handle fs/fhandle.c:40 [inline] __do_sys_name_to_handle_at fs/fhandle.c:109 [inline] __se_sys_name_to_handle_at+0x39b/0x8f0 fs/fhandle.c:93 __ia32_sys_name_to_handle_at+0xe3/0x150 fs/fhandle.c:93 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff8880ac986b80 Data copied to user address 0000000020000040 CPU: 0 PID: 7614 Comm: syz-executor.1 Not tainted 6.4.0-rc3-syzkaller-gf93f2feda5d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 =====================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/05/29 08:57 | https://github.com/google/kmsan.git master | f93f2feda5d6 | cf184559 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-386 | KMSAN: kernel-infoleak in sys_name_to_handle_at | ||
2023/03/21 07:48 | https://github.com/google/kmsan.git master | 90ea0df61c98 | 7939252e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-386 | KMSAN: kernel-infoleak in sys_name_to_handle_at |