KASAN: vmalloc-out-of-bounds Read in bpf_trace

KASAN: vmalloc-out-of-bounds Read in bpf_trace_run1
Status: upstream: reported on 2020/11/10 02:58
Reported-by: syzbot+3cab841567b697b80981@syzkaller.appspotmail.com
First crash: 140d, last: 81d

Sample crash report:

==================================================================
BUG: KASAN: vmalloc-out-of-bounds in __bpf_trace_run kernel/trace/bpf_trace.c:2055 [inline]
BUG: KASAN: vmalloc-out-of-bounds in bpf_trace_run1+0x3b0/0x3c0 kernel/trace/bpf_trace.c:2091
Read of size 8 at addr ffffc90002295030 by task syz-executor.1/30621

CPU: 0 PID: 30621 Comm: syz-executor.1 Not tainted 5.10.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x4c8 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
 __bpf_trace_run kernel/trace/bpf_trace.c:2055 [inline]
 bpf_trace_run1+0x3b0/0x3c0 kernel/trace/bpf_trace.c:2091
 __bpf_trace_block_plug+0x8b/0xc0 block/blk-core.c:716
 trace_block_plug+0x138/0x280 include/trace/events/block.h:470
 blk_mq_submit_bio+0xcf2/0x1770 block/blk-mq.c:2219
 __submit_bio_noacct_mq block/blk-core.c:1026 [inline]
 submit_bio_noacct+0xa27/0xe30 block/blk-core.c:1059
 submit_bio+0x263/0x5b0 block/blk-core.c:1129
 ext4_io_submit+0x181/0x210 fs/ext4/page-io.c:382
 ext4_writepages+0x1369/0x38a0 fs/ext4/inode.c:2812
 do_writepages+0xec/0x290 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0x2a1/0x380 mm/filemap.c:422
 ext4_alloc_da_blocks+0x1ed/0x330 fs/ext4/inode.c:3156
 ext4_release_file+0x183/0x370 fs/ext4/file.c:142
 __fput+0x285/0x920 fs/file_table.c:281
 task_work_run+0xdd/0x190 kernel/task_work.c:151
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:164 [inline]
 exit_to_user_mode_prepare+0x17e/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e159
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f73a3971c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000045e159
RDX: 0000000020000040 RSI: 0000000040305829 RDI: 0000000000000004
RBP: 000000000119c068 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007fff943a666f R14: 00007f73a39729c0 R15: 000000000119c034


Memory state around the buggy address:
 ffffc90002294f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90002294f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90002295000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                                     ^
 ffffc90002295080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90002295100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================

Crashes (11):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info
ci-upstream-bpf-kasan-gce	2020/12/11 02:59	bpf	34817d23	f900b48c	.config	log	report	info
ci-upstream-bpf-kasan-gce	2020/12/03 18:44	bpf	3413f041	e6b0d314	.config	log	report	info
ci-upstream-bpf-kasan-gce	2020/11/16 06:17	bpf	f782e2c3	1bf9a662	.config	log	report	info
ci-upstream-bpf-kasan-gce	2020/11/10 02:57	bpf	4e0396c5	64069d48	.config	log	report	info
ci-upstream-bpf-kasan-gce	2020/10/31 17:40	bpf	080b6f40	8bc4594f	.config	log	report	info
ci-upstream-bpf-kasan-gce	2020/10/20 00:15	bpf	76702a2e	ff4a3345	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/11/27 14:25	bpf-next	830382e4	5018c946	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/11/19 13:05	bpf-next	d0551261	0767f13f	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/11/16 05:54	bpf-next	2d38c580	1bf9a662	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/11/10 02:52	bpf-next	666475cc	64069d48	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/10/13 05:43	bpf-next	376dcfe3	d32b0bbf	.config	log	report	info