13 bridge0 1 0 3333ffaaaa0c 15 bond0 3 0 333300000001 15 bond0 3 0 01005e000001 15 bond0 3 ./file0' ================================================================== BUG: KASAN: global-out-of-bounds in record_print_text+0x33f/0x380 kernel/printk/printk.c:1401 Write of size 1 at addr ffffffff8f07df6a by task syz-executor.0/24634 CPU: 0 PID: 24634 Comm: syz-executor.0 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5/0x2f8 mm/kasan/report.c:230 __kasan_report mm/kasan/report.c:396 [inline] kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413 record_print_text+0x33f/0x380 kernel/printk/printk.c:1401 console_unlock+0x318/0xbb0 kernel/printk/printk.c:2555 vprintk_emit+0x189/0x490 kernel/printk/printk.c:2092 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2140 logfc.cold+0x8e/0xe0 fs/fs_context.c:375 vfs_parse_fs_param fs/fs_context.c:135 [inline] vfs_parse_fs_param+0x4b3/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 shmem_parse_options+0x15f/0x240 mm/shmem.c:3570 do_new_mount fs/namespace.c:2877 [inline] path_mount+0x1365/0x20c0 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3409 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f3a549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55130cc EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000180 RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000020000240 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the variable: always_kmsg_dump+0xa/0x40 Memory state around the buggy address: ffffffff8f07de00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff8f07de80: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 f9 f9 >ffffffff8f07df00: f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9 01 f9 f9 f9 ^ ffffffff8f07df80: f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 01 f9 f9 f9 ffffffff8f07e000: f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 04 f9 f9 f9 ==================================================================