memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5967 'syz-executor407' loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2238:2 index 2000 is out of range for type 's64[128]' (aka 'long long[128]') CPU: 0 PID: 5967 Comm: syz-executor407 Not tainted 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0xfc/0x148 lib/ubsan.c:348 dbAllocBits+0x8a4/0x8d0 fs/jfs/jfs_dmap.c:2238 dbAllocDmap fs/jfs/jfs_dmap.c:2015 [inline] dbAllocNear+0x224/0x334 fs/jfs/jfs_dmap.c:1244 dbAlloc+0x8b4/0xb68 fs/jfs/jfs_dmap.c:829 ea_get+0x6f8/0xef0 fs/jfs/xattr.c:514 __jfs_setxattr+0x41c/0x1338 fs/jfs/xattr.c:718 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x20c/0x478 fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:956 [inline] vfs_set_acl+0x728/0x94c fs/posix_acl.c:1135 do_set_acl+0xe4/0x1ac fs/posix_acl.c:1280 do_setxattr fs/xattr.c:627 [inline] setxattr+0x230/0x29c fs/xattr.c:653 path_setxattr+0x17c/0x258 fs/xattr.c:672 __do_sys_lsetxattr fs/xattr.c:695 [inline] __se_sys_lsetxattr fs/xattr.c:691 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:691 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 ================================================================================ ================================================================== BUG: KASAN: slab-use-after-free in dbAllocBits+0x7a8/0x8d0 fs/jfs/jfs_dmap.c:2238 Read of size 8 at addr ffff0000dc158eb8 by task syz-executor407/5967 CPU: 0 PID: 5967 Comm: syz-executor407 Not tainted 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x174/0x514 mm/kasan/report.c:462 kasan_report+0xd4/0x130 mm/kasan/report.c:572 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 dbAllocBits+0x7a8/0x8d0 fs/jfs/jfs_dmap.c:2238 dbAllocDmap fs/jfs/jfs_dmap.c:2015 [inline] dbAllocNear+0x224/0x334 fs/jfs/jfs_dmap.c:1244 dbAlloc+0x8b4/0xb68 fs/jfs/jfs_dmap.c:829 ea_get+0x6f8/0xef0 fs/jfs/xattr.c:514 __jfs_setxattr+0x41c/0x1338 fs/jfs/xattr.c:718 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x20c/0x478 fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:956 [inline] vfs_set_acl+0x728/0x94c fs/posix_acl.c:1135 do_set_acl+0xe4/0x1ac fs/posix_acl.c:1280 do_setxattr fs/xattr.c:627 [inline] setxattr+0x230/0x29c fs/xattr.c:653 path_setxattr+0x17c/0x258 fs/xattr.c:672 __do_sys_lsetxattr fs/xattr.c:695 [inline] __se_sys_lsetxattr fs/xattr.c:691 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:691 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 5925: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0xcc/0x1b8 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x218/0x588 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x28/0x38 security/tomoyo/tomoyo.c:122 security_inode_getattr+0xd8/0x124 security/security.c:2114 vfs_getattr fs/stat.c:167 [inline] vfs_statx+0x184/0x420 fs/stat.c:242 vfs_fstatat fs/stat.c:276 [inline] __do_sys_newfstatat fs/stat.c:446 [inline] __se_sys_newfstatat fs/stat.c:440 [inline] __arm64_sys_newfstatat+0x12c/0x1b4 fs/stat.c:440 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Freed by task 5925: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:521 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0x2a8/0x49c mm/slub.c:3799 kfree+0xb8/0x19c mm/slab_common.c:1015 tomoyo_realpath_from_path+0x484/0x4cc security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x218/0x588 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x28/0x38 security/tomoyo/tomoyo.c:122 security_inode_getattr+0xd8/0x124 security/security.c:2114 vfs_getattr fs/stat.c:167 [inline] vfs_statx+0x184/0x420 fs/stat.c:242 vfs_fstatat fs/stat.c:276 [inline] __do_sys_newfstatat fs/stat.c:446 [inline] __se_sys_newfstatat fs/stat.c:440 [inline] __arm64_sys_newfstatat+0x12c/0x1b4 fs/stat.c:440 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to the object at ffff0000dc158000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3768 bytes inside of freed 4096-byte region [ffff0000dc158000, ffff0000dc159000) The buggy address belongs to the physical page: page:000000009696a80b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11c158 head:000000009696a80b order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000010200 ffff0000c0002a80 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dc158d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dc158e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000dc158e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000dc158f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000dc158f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== JFS: metapage_get_blocks failed ERROR: (device loop0): release_metapage: metapage_write_one() failed ERROR: (device loop0): remounting filesystem as read-only