KASAN: slab-out-of-bounds Write in udf_write

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[syzbot] [udf?] KASAN: slab-out-of-bounds Write in udf_write_aext (2)	0 (1)	2025/07/15 07:05

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[syzbot] [udf?] KASAN: slab-out-of-bounds Write in udf_write_aext (2)

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2025/07/15 07:05

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	KASAN: slab-out-of-bounds Write in udf_write_aext origin:lts-only	24	C		error	7050	272d	863d	0/3	auto-obsoleted due to no activity on 2025/01/22 09:20
linux-6.1	KASAN: slab-out-of-bounds Write in udf_write_aext origin:lts-only	24	C		done	5821	273d	863d	0/3	upstream: reported C repro on 2023/03/11 14:12
linux-4.14	KASAN: slab-out-of-bounds Write in udf_write_aext udf f2fs tmpfs	23	C			17	868d	1030d	0/1	upstream: reported C repro on 2022/09/25 01:59
upstream	KASAN: slab-out-of-bounds Write in udf_write_aext udf	24	C	error	error	674	868d	1029d	0/29	auto-obsoleted due to no activity on 2023/07/26 07:31
linux-4.19	KASAN: slab-out-of-bounds Write in udf_write_aext udf tmpfs erofs	23	C		error	67	868d	1359d	0/1	upstream: reported C repro on 2021/10/31 06:20

udf_setattr+0x3a1/0x5a0 fs/udf/file.c:236 notify_change+0xb36/0xe40 fs/attr.c:552 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x306c/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbc4ff8e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc50d42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fbc501b6160 RCX: 00007fbc4ff8e929 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 00002000000002c0 RBP: 00007fbc50010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbc501b6160 R15: 00007ffe3eb0f768 </TASK> getblk(): invalid block size 512 requested logical block size: 2048 CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __getblk_slow fs/buffer.c:1133 [inline] bdev_getblk+0x5b0/0x690 fs/buffer.c:1467 __getblk include/linux/buffer_head.h:382 [inline] sb_getblk include/linux/buffer_head.h:388 [inline] udf_setup_indirect_aext+0x190/0x800 fs/udf/inode.c:1998 udf_table_free_blocks fs/udf/balloc.c:472 [inline] udf_free_blocks+0x13f2/0x17f0 fs/udf/balloc.c:677 extent_trunc+0x35c/0x450 fs/udf/truncate.c:52 udf_truncate_extents+0x5b0/0xec0 fs/udf/truncate.c:271 udf_setsize+0x972/0x1000 fs/udf/inode.c:1317 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:236 notify_change+0xb36/0xe40 fs/attr.c:552 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x306c/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbc4ff8e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc50d42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fbc501b6160 RCX: 00007fbc4ff8e929 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 00002000000002c0 RBP: 00007fbc50010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbc501b6160 R15: 00007ffe3eb0f768 </TASK> ================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x69d/0x7b0 fs/udf/inode.c:2160 Write of size 4 at addr ffff88803f0485d8 by task syz.0.0/5337 CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x230 mm/kasan/report.c:480 kasan_report+0x118/0x150 mm/kasan/report.c:593 udf_write_aext+0x69d/0x7b0 fs/udf/inode.c:2160 __udf_add_aext+0x2b9/0x6d0 fs/udf/inode.c:2085 udf_table_free_blocks fs/udf/balloc.c:481 [inline] udf_free_blocks+0x1466/0x17f0 fs/udf/balloc.c:677 extent_trunc+0x35c/0x450 fs/udf/truncate.c:52 udf_truncate_extents+0x5b0/0xec0 fs/udf/truncate.c:271 udf_setsize+0x972/0x1000 fs/udf/inode.c:1317 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:236 notify_change+0xb36/0xe40 fs/attr.c:552 do_truncate+0x1a4/0x220 fs/open.c:68 handle_truncate fs/namei.c:3517 [inline] do_open fs/namei.c:3900 [inline] path_openat+0x306c/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbc4ff8e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc50d42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fbc501b6160 RCX: 00007fbc4ff8e929 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 00002000000002c0 RBP: 00007fbc50010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbc501b6160 R15: 00007ffe3eb0f768 </TASK> Allocated by task 5335: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] udf_alloc_i_data fs/udf/inode.c:1661 [inline] udf_read_inode fs/udf/inode.c:1473 [inline] __udf_iget+0xc66/0x3ae0 fs/udf/inode.c:1967 udf_iget_special fs/udf/udfdecl.h:147 [inline] udf_fill_partdesc_info+0x773/0x1310 fs/udf/super.c:1162 udf_load_partdesc fs/udf/super.c:1321 [inline] udf_process_sequence+0x1133/0x4840 fs/udf/super.c:1837 udf_load_sequence fs/udf/super.c:1875 [inline] udf_check_anchor_block+0x28e/0x550 fs/udf/super.c:1910 udf_scan_anchors fs/udf/super.c:1964 [inline] udf_load_vrs+0x96d/0xf20 fs/udf/super.c:2024 udf_fill_super+0x5ad/0x17a0 fs/udf/super.c:2192 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88803f048400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of allocated 472-byte region [ffff88803f048400, ffff88803f0485d8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88803f048000 pfn:0x3f048 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000240 ffff88801a441c80 ffffea000100d490 ffffea0000fec710 raw: ffff88803f048000 0000000000080007 00000000f5000000 0000000000000000 head: 04fff00000000240 ffff88801a441c80 ffffea000100d490 ffffea0000fec710 head: ffff88803f048000 0000000000080007 00000000f5000000 0000000000000000 head: 04fff00000000001 ffffea0000fc1201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 22938950246, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_noprof+0x305/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] net_alloc_generic net/core/net_namespace.c:77 [inline] net_assign_generic net/core/net_namespace.c:97 [inline] ops_init+0x1eb/0x5c0 net/core/net_namespace.c:132 __register_pernet_operations net/core/net_namespace.c:1284 [inline] register_pernet_operations+0x336/0x800 net/core/net_namespace.c:1361 register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1402 tcf_register_action+0x8f/0x670 net/sched/act_api.c:1021 do_one_initcall+0x233/0x820 init/main.c:1274 do_initcall_level+0x137/0x1f0 init/main.c:1336 do_initcalls+0x69/0xd0 init/main.c:1352 kernel_init_freeable+0x3d9/0x570 init/main.c:1584 kernel_init+0x1d/0x1d0 init/main.c:1474 page_owner free stack trace missing Memory state around the buggy address: ffff88803f048480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803f048500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88803f048580: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ^ ffff88803f048600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803f048680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Assets (help?)	Manager	Title
2025/07/13 13:02	upstream	3f31a806a62e	3cda49cf	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	KASAN: slab-out-of-bounds Write in udf_write_aext
2025/07/11 20:25	upstream	40f92e79b0aa	3cda49cf	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	KASAN: slab-out-of-bounds Write in udf_write_aext
2025/07/11 12:38	upstream	bc9ff192a6c9	3cda49cf	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	KASAN: slab-out-of-bounds Write in udf_write_aext
2025/07/10 23:38	upstream	bc9ff192a6c9	3cda49cf	.config	console log	report	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	KASAN: slab-out-of-bounds Write in udf_write_aext

Crashes (4):

Assets (help?)