EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue ================================================================== BUG: KASAN: slab-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] BUG: KASAN: slab-out-of-bounds in diAlloc+0x20e/0x1440 fs/jfs/jfs_imap.c:1374 Read of size 4 at addr ffff88808ac21710 by task syz-executor.1/6301 CPU: 1 PID: 6301 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] diAlloc+0x20e/0x1440 fs/jfs/jfs_imap.c:1374 ialloc+0x8c/0x970 fs/jfs/jfs_inode.c:69 jfs_create.part.0+0x12b/0x880 fs/jfs/namei.c:105 jfs_create+0x3f/0x60 fs/jfs/namei.c:90 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5adb8635a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5ada1b5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f5adb984050 RCX: 00007f5adb8635a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f5adb8be580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd80ab1d7f R14: 00007f5ada1b5300 R15: 0000000000022000 Allocated by task 4844: kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 kmem_cache_zalloc include/linux/slab.h:699 [inline] alloc_buffer_head+0x20/0x130 fs/buffer.c:3372 alloc_page_buffers+0x169/0x5c0 fs/buffer.c:830 create_empty_buffers+0x2c/0x760 fs/buffer.c:1528 create_page_buffers+0x212/0x350 fs/buffer.c:1645 __block_write_begin_int+0x22b/0x17b0 fs/buffer.c:1957 ext4_da_write_begin+0x4e1/0x10e0 fs/ext4/inode.c:3109 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] do_iter_readv_writev+0x668/0x790 fs/read_write.c:681 do_iter_write+0x182/0x5d0 fs/read_write.c:960 vfs_iter_write+0x70/0xa0 fs/read_write.c:973 iter_file_splice_write+0x60d/0xbb0 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1025 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8121: __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x7f/0x260 mm/slab.c:3765 free_buffer_head+0x4a/0xf0 fs/buffer.c:3387 try_to_free_buffers+0x38b/0x5d0 fs/buffer.c:3302 ext4_releasepage+0x38b/0x4a0 fs/ext4/inode.c:3423 try_to_release_page+0x242/0x390 mm/filemap.c:3358 block_invalidatepage+0x45b/0x4f0 fs/buffer.c:1511 do_invalidatepage mm/truncate.c:165 [inline] truncate_cleanup_page+0x2b7/0x430 mm/truncate.c:184 truncate_inode_pages_range+0x528/0x1b00 mm/truncate.c:364 ext4_evict_inode+0x4d6/0x17b0 fs/ext4/inode.c:250 evict+0x2ed/0x760 fs/inode.c:559 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 do_unlinkat+0x40b/0x660 fs/namei.c:4071 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88808ac21690 which belongs to the cache buffer_head of size 104 The buggy address is located 24 bytes to the right of 104-byte region [ffff88808ac21690, ffff88808ac216f8) The buggy address belongs to the page: page:ffffea00022b0840 count:1 mapcount:0 mapping:ffff88823b843080 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00011fdc48 ffffea0000a10648 ffff88823b843080 raw: 0000000000000000 ffff88808ac21000 0000000100000018 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808ac21600: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff88808ac21680: fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb fc >ffff88808ac21700: fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb ^ ffff88808ac21780: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb ffff88808ac21800: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ==================================================================