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Date: Wed, 5 Aug 2020 08:20:15 +0800
From: kernel test robot <lkp@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, LKP <lkp@...ts.01.org>
Subject: ed66f991bb ("module: Refactor section attr into bin attribute"): [
70.645135] BUG: KASAN: slab-out-of-bounds in vsnprintf
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit ed66f991bb19d94cae5d38f77de81f96aac7813f
Author: Kees Cook <keescook@...omium.org>
AuthorDate: Thu Jul 2 13:47:20 2020 -0700
Commit: Kees Cook <keescook@...omium.org>
CommitDate: Wed Jul 8 16:00:17 2020 -0700
module: Refactor section attr into bin attribute
In order to gain access to the open file's f_cred for kallsym visibility
permission checks, refactor the module section attributes to use the
bin_attribute instead of attribute interface. Additionally removes the
redundant "name" struct member.
Cc: stable@...r.kernel.org
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Tested-by: Jessica Yu <jeyu@...nel.org>
Acked-by: Jessica Yu <jeyu@...nel.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
160251842c kallsyms: Refactor kallsyms_show_value() to take cred
ed66f991bb module: Refactor section attr into bin attribute
c0842fbc1b random32: move the pseudo-random 32-bit definitions to prandom.h
+-----------------------------------+------------+------------+------------+
| | 160251842c | ed66f991bb | c0842fbc1b |
+-----------------------------------+------------+------------+------------+
| boot_successes | 642 | 200 | 30 |
| boot_failures | 9 | 20 | 2 |
| BUG:kernel_hang_in_test_stage | 2 | | |
| BUG:kernel_hang_in_boot_stage | 7 | 1 | |
| BUG:KASAN:slab-out-of-bounds_in_n | 0 | 5 | 1 |
| BUG:KASAN:slab-out-of-bounds_in_v | 0 | 14 | 1 |
+-----------------------------------+------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>
[ 64.103075] trinity-c0 (1011): attempted to duplicate a private mapping with mremap. This is not supported.
[ 64.300797] Lockdown: trinity-c0: unsafe use of perf is restricted; see man kernel_lockdown.7
[ 65.342888] Unable to find swap-space signature
[main] 10730 iterations. [F:7458 S:3194 HI:3556]
[ 70.643757] ==================================================================
[ 70.645135] BUG: KASAN: slab-out-of-bounds in vsnprintf+0xa75/0x1e70
[ 70.646293] Write of size 2 at addr ffff888358c37e80 by task trinity-c2/1318
[ 70.647661]
[ 70.647974] CPU: 0 PID: 1318 Comm: trinity-c2 Not tainted 5.8.0-rc2-00002-ged66f991bb19d #1
[ 70.649549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 70.651118] Call Trace:
[ 70.651761] dump_stack+0x35/0x50
[ 70.652419] print_address_description+0x2f/0x360
[ 70.653490] ? stack_trace_save+0x96/0xd0
[ 70.654239] ? stack_trace_snprint+0x120/0x120
[ 70.655066] ? vsnprintf+0xa75/0x1e70
[ 70.687351] kasan_report.cold+0xba/0x17e
[ 70.688142] ? vsnprintf+0xa75/0x1e70
[ 70.688855] check_memory_region+0x2b2/0x300
[ 70.689687] memcpy+0x5c/0xa0
[ 70.690287] vsnprintf+0xa75/0x1e70
[ 70.690959] ? pointer+0x8b0/0x8b0
[ 70.691736] sprintf+0xb6/0xf0
[ 70.692329] ? va_format+0x1b0/0x1b0
[ 70.693117] ? prep_new_page+0xa1/0x450
[ 70.693836] ? __might_sleep+0xab/0x1e0
[ 70.694586] module_sect_read+0x64/0xc0
[ 70.695324] sysfs_kf_bin_read+0x15a/0x310
[ 70.696093] kernfs_file_direct_read+0x213/0x4e0
[ 70.696935] kernfs_fop_read+0xd9/0x180
[ 70.697650] do_loop_readv_writev+0xda/0x320
[ 70.698440] do_iter_read+0x2af/0x3a0
[ 70.699147] vfs_readv+0xe1/0x160
[ 70.699848] ? compat_rw_copy_check_uvector+0x550/0x550
[ 70.700810] ? push_pipe+0x283/0x7a0
[ 70.701457] ? iov_iter_get_pages_alloc+0xc82/0x16a0
[ 70.702364] ? iov_iter_pipe+0x300/0x300
[ 70.703092] ? find_get_entry+0x18c/0x3a0
[ 70.703850] ? __lock_page_or_retry+0x360/0x360
[ 70.704686] default_file_splice_read+0x532/0x9f0
[ 70.705653] ? iter_file_splice_write+0xca0/0xca0
[ 70.706514] ? __kasan_check_read+0x21/0x30
[ 70.707304] ? __module_text_address+0x1b/0x1a0
[ 70.708156] ? __kasan_check_read+0x21/0x30
[ 70.708929] ? __fsnotify_update_child_dentry_flags+0x2e0/0x2e0
[ 70.710004] ? __kasan_check_write+0x24/0x30
[ 70.710806] ? __fsnotify_inode_delete+0x30/0x30
[ 70.711682] ? security_file_permission+0x1fb/0x530
[ 70.712586] ? rw_verify_area+0xc8/0x350
[ 70.713316] do_splice_to+0x126/0x1a0
[ 70.714009] splice_direct_to_actor+0x2d7/0xa00
[ 70.714830] ? __generic_file_write_iter+0x363/0x610
[ 70.715771] ? do_splice_from+0x140/0x140
[ 70.716522] ? do_splice_to+0x1a0/0x1a0
[ 70.717242] ? rw_verify_area+0xc8/0x350
[ 70.717952] do_splice_direct+0x16e/0x2e0
[ 70.718708] ? new_sync_write+0x3a4/0x6f0
[ 70.723643] ? splice_direct_to_actor+0xa00/0xa00
[ 70.724557] ? __might_sleep+0xab/0x1e0
[ 70.725304] ? rw_verify_area+0xc8/0x350
[ 70.726071] do_sendfile+0x478/0xe30
[ 70.726771] ? __x64_sys_copy_file_range+0x560/0x560
[ 70.727824] ? __might_sleep+0xab/0x1e0
[ 70.728667] ? __kasan_check_write+0x24/0x30
[ 70.729631] __x64_sys_sendfile64+0x145/0x250
[ 70.730560] ? __x32_compat_sys_sendfile+0x250/0x250
[ 70.731694] ? __prepare_exit_to_usermode+0xa8/0x2d0
[ 70.732919] do_syscall_64+0x6d/0x290
[ 70.733856] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 70.735137] RIP: 0033:0x457729
[ 70.735882] Code: Bad RIP value.
[ 70.736662] RSP: 002b:00007ffd0e5de6c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
[ 70.738494] RAX: ffffffffffffffda RBX: 0000000000000028 RCX: 0000000000457729
[ 70.740255] RDX: 0000000000000001 RSI: 000000000000003d RDI: 000000000000011c
[ 70.742031] RBP: 00007ffd0e5de770 R08: 00000000000000dd R09: 000000000000ff47
[ 70.743729] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000002
[ 70.745081] R13: 00007fb7e7ab4058 R14: 0000000001057830 R15: 00007fb7e7ab4000
[ 70.746414]
[ 70.746746] Allocated by task 1318:
[ 70.747461] save_stack+0x2b/0x70
[ 70.748126] __kasan_kmalloc+0x111/0x120
[ 70.749086] kasan_kmalloc+0x11/0x20
[ 70.749796] __kmalloc+0x196/0x300
[ 70.750470] kernfs_file_direct_read+0x368/0x4e0
[ 70.755459] kernfs_fop_read+0xd9/0x180
[ 70.756218] do_loop_readv_writev+0xda/0x320
[ 70.757045] do_iter_read+0x2af/0x3a0
[ 70.757760] vfs_readv+0xe1/0x160
[ 70.758417] default_file_splice_read+0x532/0x9f0
[ 70.759441] do_splice_to+0x126/0x1a0
[ 70.760165] splice_direct_to_actor+0x2d7/0xa00
[ 70.761060] do_splice_direct+0x16e/0x2e0
[ 70.761812] do_sendfile+0x478/0xe30
[ 70.762511] __x64_sys_sendfile64+0x145/0x250
[ 70.763372] do_syscall_64+0x6d/0x290
[ 70.764092] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 70.765050]
[ 70.765375] Freed by task 0:
[ 70.765918] (stack is not available)
[ 70.766610]
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start d9ad7006330c4d6ce3d7369ed85f9404a6629dba v5.7 --
git bisect good 44ebe016df3aad96e3be8f95ec52397728dd7701 # 13:58 G 212 0 1 1 Merge branch 'proc-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
git bisect good 2cfa46dadd203eef88cc70131df7a81ebc34b8ff # 15:42 G 212 0 1 1 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
git bisect bad cb24c61b53c3f47d4ba596fe37076202f7189676 # 16:02 B 0 1 17 0 Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect good 9bc0b029a8889f2c67c988760aba66a8d7b22af5 # 16:32 G 212 0 0 0 Merge tag 'powerpc-5.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
git bisect good a6bc851ffe0b246ab4f8aa0d01620fbc08d0441f # 17:52 G 213 0 1 1 Merge tag 'tpmdd-next-v5.8-rc5' of git://git.infradead.org/users/jjs/linux-tpmdd
git bisect good 0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7 # 18:28 G 216 0 1 1 Documentation: update for gcc 4.9 requirement
git bisect bad 355a3587d4ca09f2b1014778a7c8908351a91468 # 18:52 B 13 1 1 1 kbuild: Move -Wtype-limits to W=2
git bisect bad ce69fb3b392fbfd6c255aeb0ee371652478c716f # 19:23 B 11 2 1 1 Merge tag 'kallsyms_show_value-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
git bisect bad b25a7c5af9051850d4f3d93ca500056ab6ec724b # 19:47 B 3 2 0 0 module: Do not expose section addresses to non-CAP_SYSLOG
git bisect bad ed66f991bb19d94cae5d38f77de81f96aac7813f # 20:15 B 15 1 0 0 module: Refactor section attr into bin attribute
git bisect good 160251842cd35a75edfb0a1d76afa3eb674ff40a # 22:02 G 211 0 2 2 kallsyms: Refactor kallsyms_show_value() to take cred
# first bad commit: [ed66f991bb19d94cae5d38f77de81f96aac7813f] module: Refactor section attr into bin attribute
git bisect good 160251842cd35a75edfb0a1d76afa3eb674ff40a # 23:22 G 632 0 7 9 kallsyms: Refactor kallsyms_show_value() to take cred
# extra tests with debug options
git bisect bad ed66f991bb19d94cae5d38f77de81f96aac7813f # 23:56 B 34 1 0 0 module: Refactor section attr into bin attribute
# extra tests on head commit of linus/master
git bisect bad c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a # 01:15 B 30 1 1 1 random32: move the pseudo-random 32-bit definitions to prandom.h
# bad: [c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a] random32: move the pseudo-random 32-bit definitions to prandom.h
# extra tests on linus/master
# duplicated: [c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a] random32: move the pseudo-random 32-bit definitions to prandom.h
# extra tests on linux-next/master
# 119: [1cfc1dba44c2b62b2856bf23624116eea9cd5627] Add linux-next specific files for 20200804
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/lkp@lists.01.org
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