================================================================== BUG: KASAN: slab-out-of-bounds in nilfs_iget_test+0xac/0x2c8 fs/nilfs2/inode.c:544 Read of size 8 at addr ffff000156b1a398 by task syz-executor.1/15211 CPU: 1 PID: 15211 Comm: syz-executor.1 Not tainted 6.3.0-rc6-syzkaller-g7920df21c1b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:381 nilfs_iget_test+0xac/0x2c8 fs/nilfs2/inode.c:544 find_inode+0x170/0x3b4 fs/inode.c:916 ilookup5_nowait fs/inode.c:1429 [inline] ilookup5+0xc0/0x1e4 fs/inode.c:1458 iget5_locked+0x48/0x234 fs/inode.c:1239 nilfs_iget_locked+0x118/0x178 fs/nilfs2/inode.c:605 nilfs_dat_read+0xd8/0x2c4 fs/nilfs2/dat.c:508 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline] load_nilfs+0x414/0xe00 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super+0x24c/0x540 fs/nilfs2/super.c:1069 nilfs_mount+0x598/0x82c fs/nilfs2/super.c:1326 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe20 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __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+0x58/0x168 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 4079: 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_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x80/0x488 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x1bc/0x3c4 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:2686 [inline] f2fs_alloc_inode+0x150/0x4a8 fs/f2fs/super.c:1371 alloc_inode fs/inode.c:260 [inline] iget_locked+0x170/0x708 fs/inode.c:1287 f2fs_iget+0x5c/0x5360 fs/f2fs/inode.c:504 f2fs_fill_super+0x3bb4/0x638c fs/f2fs/super.c:4254 mount_bdev+0x26c/0x368 fs/super.c:1380 f2fs_mount+0x44/0x58 fs/f2fs/super.c:4603 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe20 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __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+0x58/0x168 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 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:491 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:501 __call_rcu_common kernel/rcu/tree.c:2622 [inline] call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2736 destroy_inode fs/inode.c:315 [inline] evict+0x5fc/0x68c fs/inode.c:680 iput_final fs/inode.c:1748 [inline] iput+0x734/0x818 fs/inode.c:1774 f2fs_put_super+0x530/0xa28 fs/f2fs/super.c:1600 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 kill_f2fs_super+0x268/0x32c fs/f2fs/super.c:4635 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1302 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Second to last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:491 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:501 __call_rcu_common kernel/rcu/tree.c:2622 [inline] call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2736 destroy_inode fs/inode.c:315 [inline] evict+0x5fc/0x68c fs/inode.c:680 iput_final fs/inode.c:1748 [inline] iput+0x734/0x818 fs/inode.c:1774 f2fs_fill_super+0x5020/0x638c fs/f2fs/super.c:4539 mount_bdev+0x26c/0x368 fs/super.c:1380 f2fs_mount+0x44/0x58 fs/f2fs/super.c:4603 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe20 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __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+0x58/0x168 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 ffff000156b19ab8 which belongs to the cache f2fs_inode_cache of size 2152 The buggy address is located 120 bytes to the right of allocated 2152-byte region [ffff000156b19ab8, ffff000156b1a320) The buggy address belongs to the physical page: page:000000009c28e640 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff000156b19ab8 pfn:0x196b18 head:000000009c28e640 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000c2e70401 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c3c65c80 dead000000000122 0000000000000000 raw: ffff000156b19ab8 00000000800e000a 00000001ffffffff ffff0000c2e70401 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000156b1a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff000156b1a300: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc >ffff000156b1a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff000156b1a400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff000156b1a480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address dfff800000000016 KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000016] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 15211 Comm: syz-executor.1 Tainted: G B 6.3.0-rc6-syzkaller-g7920df21c1b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : nilfs_palloc_get_entry_block+0x58/0xb0 fs/nilfs2/alloc.c:316 lr : nilfs_palloc_get_entry_block+0x34/0xb0 fs/nilfs2/alloc.c:315 sp : ffff800021d46fe0 x29: ffff800021d46fe0 x28: 1ffff000043a8e0c x27: 1ffff000043a8e20 x26: dfff800000000000 x25: ffff800012821180 x24: dfff800000000000 x23: 00000000000000b0 x22: 0000000000000018 x21: ffff000156b1a3a0 x20: 0000000000000000 x19: ffff800021d47060 x18: ffff0001b42a8c98 x17: ffff800015c7d000 x16: ffff8000082fe940 x15: 0000000000000000 x14: 00000000ffff8000 x13: 00000000e64db04c x12: 0000000000040000 x11: 000000000003ffff x10: ffff8000287c1000 x9 : ffff800009df3fe0 x8 : 0000000000000016 x7 : 0000000000000000 x6 : ffff800009dada84 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800021d47060 x2 : 0000000000000000 x1 : 0000000000000018 x0 : ffff000156b1a3a0 Call trace: nilfs_palloc_get_entry_block+0x58/0xb0 fs/nilfs2/alloc.c:316 nilfs_dat_translate+0xb4/0x4f0 fs/nilfs2/dat.c:416 nilfs_bmap_lookup_at_level+0x1c8/0x320 fs/nilfs2/bmap.c:75 nilfs_bmap_lookup fs/nilfs2/bmap.h:170 [inline] nilfs_mdt_submit_block+0x23c/0x9b0 fs/nilfs2/mdt.c:142 nilfs_mdt_read_block+0xe4/0x3d8 fs/nilfs2/mdt.c:176 nilfs_mdt_get_block+0x110/0xbc4 fs/nilfs2/mdt.c:251 nilfs_sufile_get_header_block fs/nilfs2/sufile.c:85 [inline] nilfs_sufile_read+0x244/0x418 fs/nilfs2/sufile.c:1202 nilfs_load_super_root fs/nilfs2/the_nilfs.c:130 [inline] load_nilfs+0x518/0xe00 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super+0x24c/0x540 fs/nilfs2/super.c:1069 nilfs_mount+0x598/0x82c fs/nilfs2/super.c:1326 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe20 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __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+0x58/0x168 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 Code: 97add16c f94002e8 9102c117 d343fee8 (38786908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97add16c bl 0xfffffffffeb745b0 4: f94002e8 ldr x8, [x23] 8: 9102c117 add x23, x8, #0xb0 c: d343fee8 lsr x8, x23, #3 * 10: 38786908 ldrb w8, [x8, x24] <-- trapping instruction