audit: type=1400 audit(1601382360.126:8): avc: denied { execmem } for pid=6487 comm="syz-executor778" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" gfs2: fsid=loop0: Now mounting FS... ================================================================================ UBSAN: Undefined behaviour in fs/gfs2/ops_fstype.c:288:19 shift exponent 4294967287 is too large for 64-bit type 'long unsigned int' CPU: 1 PID: 6487 Comm: syz-executor778 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422 gfs2_read_sb fs/gfs2/ops_fstype.c:288 [inline] init_sb.cold+0x52/0x125 fs/gfs2/ops_fstype.c:469 fill_super+0x174d/0x2680 fs/gfs2/ops_fstype.c:1120 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc2bba29a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc2bba2a00 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2bba29c0 RBP: 00007ffc2bba29c0 R08: 00007ffc2bba2a00 R09: 00007ffc00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 ================================================================================ ================================================================================ UBSAN: Undefined behaviour in fs/gfs2/ops_fstype.c:332:21 index 11 is out of range for type 'u64 [11]' CPU: 1 PID: 6487 Comm: syz-executor778 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383 gfs2_read_sb fs/gfs2/ops_fstype.c:332 [inline] init_sb+0xd35/0xe60 fs/gfs2/ops_fstype.c:469 fill_super+0x174d/0x2680 fs/gfs2/ops_fstype.c:1120 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc2bba29a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc2bba2a00 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2bba29c0 RBP: 00007ffc2bba29c0 R08: 00007ffc2bba2a00 R09: 00007ffc00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 ================================================================================ ================================================================================ UBSAN: Undefined behaviour in fs/gfs2/ops_fstype.c:326:29 index 11 is out of range for type 'u64 [11]' CPU: 1 PID: 6487 Comm: syz-executor778 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383 gfs2_read_sb fs/gfs2/ops_fstype.c:326 [inline] init_sb+0xcd6/0xe60 fs/gfs2/ops_fstype.c:469 fill_super+0x174d/0x2680 fs/gfs2/ops_fstype.c:1120 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc2bba29a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc2bba2a00 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2bba29c0 RBP: 00007ffc2bba29c0 R08: 00007ffc2bba2a00 R09: 00007ffc00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 ================================================================================ ================================================================================ UBSAN: Undefined behaviour in fs/gfs2/ops_fstype.c:330:30 index 11 is out of range for type 'u64 [11]' CPU: 1 PID: 6487 Comm: syz-executor778 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383 gfs2_read_sb fs/gfs2/ops_fstype.c:330 [inline] init_sb+0xcef/0xe60 fs/gfs2/ops_fstype.c:469 fill_super+0x174d/0x2680 fs/gfs2/ops_fstype.c:1120 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc2bba29a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc2bba2a00 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2bba29c0 RBP: 00007ffc2bba29c0 R08: 00007ffc2bba2a00 R09: 00007ffc00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 ================================================================================ ================================================================== BUG: KASAN: slab-out-of-bounds in gfs2_read_sb fs/gfs2/ops_fstype.c:332 [inline] BUG: KASAN: slab-out-of-bounds in init_sb+0xd3f/0xe60 fs/gfs2/ops_fstype.c:469 Write of size 8 at addr ffff8880a4249f28 by task syz-executor778/6487 CPU: 1 PID: 6487 Comm: syz-executor778 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118 print_address_description.cold+0x56/0x25c mm/kasan/report.c:256 kasan_report_error.cold+0x66/0xb9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_store8_noabort+0x88/0x90 mm/kasan/report.c:438 gfs2_read_sb fs/gfs2/ops_fstype.c:332 [inline] init_sb+0xd3f/0xe60 fs/gfs2/ops_fstype.c:469 fill_super+0x174d/0x2680 fs/gfs2/ops_fstype.c:1120 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc2bba29a8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc2bba2a00 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2bba29c0 RBP: 00007ffc2bba29c0 R08: 00007ffc2bba2a00 R09: 00007ffc00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Allocated by task 6487: kmem_cache_alloc_trace+0x12f/0x4b0 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] init_sbd fs/gfs2/ops_fstype.c:71 [inline] fill_super+0xca/0x2680 fs/gfs2/ops_fstype.c:1041 gfs2_mount+0x4c0/0x598 fs/gfs2/ops_fstype.c:1312 mount_fs+0xa3/0x318 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x51c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8880a4248bc0 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 4968 bytes inside of 8192-byte region [ffff8880a4248bc0, ffff8880a424abc0) The buggy address belongs to the page: page:ffffea0002909200 count:1 mapcount:0 mapping:ffff88812c3f5080 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea0002125208 ffff88812c3f4b48 ffff88812c3f5080 raw: 0000000000000000 ffff8880a4248bc0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a4249e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a4249e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a4249f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a4249f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a424a000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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