tpacket_rcv: packet too big, clamped from 65535 to 65392. macoff=96
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BUG: KASAN: out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
BUG: KASAN: out-of-bounds in __unwind_start+0x368/0x3b0 arch/x86/kernel/unwind_frame.c:76
Read of size 8 at addr ffff8801c3c97808 by task syz-executor3/15665

CPU: 1 PID: 15665 Comm: syz-executor3 Not tainted 4.9.128+ #45
 ffff8801b466f148 ffffffff81af2469 ffffea00070f25c0 ffff8801c3c97808
 0000000000000000 ffff8801c3c97810 ffff8801c9798000 ffff8801b466f180
 ffffffff814e13cb ffff8801c3c97808 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81af2469>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af2469>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814e13cb>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff814e17d5>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff814e17d5>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff814d3c14>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810aae98>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810aae98>] __unwind_start+0x368/0x3b0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff81075f89>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff81075f89>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff81076088>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff8163e2b8>] proc_pid_stack+0x148/0x220 fs/proc/base.c:469
 [<ffffffff8163683d>] proc_single_show+0xfd/0x170 fs/proc/base.c:771
 [<ffffffff8155eed6>] seq_read+0x4b6/0x12d0 fs/seq_file.c:240
 [<ffffffff814ea805>] do_loop_readv_writev.part.1+0xd5/0x280 fs/read_write.c:718
 [<ffffffff814ebeae>] do_loop_readv_writev fs/read_write.c:707 [inline]
 [<ffffffff814ebeae>] do_readv_writev+0x56e/0x7b0 fs/read_write.c:873
 [<ffffffff814ec174>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff81588a1b>] kernel_readv fs/splice.c:363 [inline]
 [<ffffffff81588a1b>] default_file_splice_read+0x44b/0x7e0 fs/splice.c:435
 [<ffffffff81587b1c>] do_splice_to+0x10c/0x170 fs/splice.c:899
 [<ffffffff81587dbf>] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971
 [<ffffffff81588503>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff814ee190>] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393
 [<ffffffff814f0361>] C_SYSC_sendfile fs/read_write.c:1469 [inline]
 [<ffffffff814f0361>] compat_SyS_sendfile+0xd1/0x160 fs/read_write.c:1458
 [<ffffffff81005fd1>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81005fd1>] do_fast_syscall_32+0x2f1/0x860 arch/x86/entry/common.c:387
 [<ffffffff8278f460>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea00070f25c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c3c97700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c3c97780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801c3c97800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                         ^
 ffff8801c3c97880: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2
 ffff8801c3c97900: f2 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00
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