loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in journal_entry_dev_usage_to_text+0xf4/0x194 fs/bcachefs/journal_io.c:727 Read of size 8 at addr ffff0000c6496000 by task syz.0.15/7271 CPU: 0 PID: 7271 Comm: syz.0.15 Not tainted 6.10.0-rc7-syzkaller-00109-gc912bf709078 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x198/0x538 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 journal_entry_dev_usage_to_text+0xf4/0x194 fs/bcachefs/journal_io.c:727 bch2_journal_entry_to_text+0x2fc/0x5a8 fs/bcachefs/journal_io.c:851 bch2_sb_clean_to_text+0x130/0x224 fs/bcachefs/sb-clean.c:313 __bch2_sb_field_to_text fs/bcachefs/super-io.c:1246 [inline] bch2_sb_field_to_text+0x1a4/0x234 fs/bcachefs/super-io.c:1262 bch2_sb_field_validate+0x1d8/0x2a8 fs/bcachefs/super-io.c:1229 bch2_sb_validate+0x908/0xbe4 fs/bcachefs/super-io.c:468 __bch2_read_super+0xa4c/0x10a8 fs/bcachefs/super-io.c:823 bch2_read_super+0x38/0x4c fs/bcachefs/super-io.c:843 bch2_fs_open+0x1e0/0xb64 fs/bcachefs/super.c:2079 bch2_mount+0x4fc/0xe68 fs/bcachefs/fs.c:1926 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1789 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x3c4/0x488 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Allocated by task 7271: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4123 [inline] kmalloc_node_track_caller_noprof+0x2cc/0x4d0 mm/slub.c:4143 __do_krealloc mm/slab_common.c:1183 [inline] krealloc_noprof+0x94/0x148 mm/slab_common.c:1216 bch2_sb_realloc+0x284/0x564 fs/bcachefs/super-io.c:189 read_one_super+0x690/0x2310 fs/bcachefs/super-io.c:660 __bch2_read_super+0x714/0x10a8 fs/bcachefs/super-io.c:751 bch2_read_super+0x38/0x4c fs/bcachefs/super-io.c:843 bch2_fs_open+0x1e0/0xb64 fs/bcachefs/super.c:2079 bch2_mount+0x4fc/0xe68 fs/bcachefs/fs.c:1926 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1789 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x3c4/0x488 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 The buggy address belongs to the object at ffff0000c6494000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 0 bytes to the right of allocated 8192-byte region [ffff0000c6494000, ffff0000c6496000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106490 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 05ffc00000000040 ffff0000c0002280 fffffdffc358d800 dead000000000002 raw: 0000000000000000 0000000080020002 00000001ffffefff 0000000000000000 head: 05ffc00000000040 ffff0000c0002280 fffffdffc358d800 dead000000000002 head: 0000000000000000 0000000080020002 00000001ffffefff 0000000000000000 head: 05ffc00000000003 fffffdffc3192401 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c6495f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000c6495f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000c6496000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000c6496080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c6496100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================