squashfs: SQUASHFS error: unable to read fragment index table SQUASHFS error: squashfs_read_data failed to read block 0x60 ================================================================== BUG: KASAN: slab-out-of-bounds in squashfs_get_id+0x1ae/0x1d0 syzkaller/managers/linux-4-19/kernel/fs/squashfs/id.c:51 Read of size 8 at addr ffff8880a8b740e0 by task syz-executor.0/6709 CPU: 0 PID: 6709 Comm: syz-executor.0 Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:354 kasan_report syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 syzkaller/managers/linux-4-19/kernel/mm/kasan/report.c:433 squashfs_get_id+0x1ae/0x1d0 syzkaller/managers/linux-4-19/kernel/fs/squashfs/id.c:51 squashfs_new_inode syzkaller/managers/linux-4-19/kernel/fs/squashfs/inode.c:64 [inline] squashfs_read_inode+0x1b4/0x1b40 syzkaller/managers/linux-4-19/kernel/fs/squashfs/inode.c:133 squashfs_fill_super+0x1655/0x1c00 syzkaller/managers/linux-4-19/kernel/fs/squashfs/super.c:318 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4672ba Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9eff204fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00000000004672ba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f9eff205000 RBP: 00007f9eff205040 R08: 00007f9eff205040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f9eff205000 R15: 0000000020010300 Allocated by task 6446: __do_kmalloc syzkaller/managers/linux-4-19/kernel/mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3736 kmalloc_array syzkaller/managers/linux-4-19/kernel/./include/linux/slab.h:637 [inline] kcalloc syzkaller/managers/linux-4-19/kernel/./include/linux/slab.h:648 [inline] squashfs_cache_init+0x3a6/0x740 syzkaller/managers/linux-4-19/kernel/fs/squashfs/cache.c:271 squashfs_fill_super+0xa94/0x1c00 syzkaller/managers/linux-4-19/kernel/fs/squashfs/super.c:204 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6446: __cache_free syzkaller/managers/linux-4-19/kernel/mm/slab.c:3503 [inline] kfree+0xcc/0x210 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3822 squashfs_cache_delete.part.0+0x248/0x370 syzkaller/managers/linux-4-19/kernel/fs/squashfs/cache.c:221 squashfs_cache_delete+0x1b/0x30 syzkaller/managers/linux-4-19/kernel/fs/squashfs/cache.c:214 squashfs_fill_super+0x248/0x1c00 syzkaller/managers/linux-4-19/kernel/fs/squashfs/super.c:338 mount_bdev+0x2fc/0x3b0 syzkaller/managers/linux-4-19/kernel/fs/super.c:1158 mount_fs+0xa3/0x310 syzkaller/managers/linux-4-19/kernel/fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:961 vfs_kern_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:951 [inline] do_new_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:2799 ksys_mount+0xcf/0x130 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3015 __do_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3029 [inline] __se_sys_mount syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 syzkaller/managers/linux-4-19/kernel/fs/namespace.c:3026 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a8b740c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes to the right of 32-byte region [ffff8880a8b740c0, ffff8880a8b740e0) The buggy address belongs to the page: page:ffffea0002a2dd00 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880a8b74fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002a4f048 ffffea0002a46008 ffff88813bff01c0 raw: ffff8880a8b74fc1 ffff8880a8b74000 000000010000002f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8b73f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a8b74000: 06 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc >ffff8880a8b74080: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff8880a8b74100: 00 01 fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ffff8880a8b74180: 00 00 fc fc fc fc fc fc 00 01 fc fc fc fc fc fc ==================================================================