loop0: detected capacity change from 0 to 2048 UDF-fs: INFO Mounting volume 'LiuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: use-after-free in le32_add_cpu include/linux/byteorder/generic.h:151 [inline] BUG: KASAN: use-after-free in udf_free_inode+0x214/0x284 fs/udf/ialloc.c:-1 Read of size 4 at addr ffff00010200fb78 by task syz.0.419/5803 CPU: 0 PID: 5803 Comm: syz.0.419 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350 le32_add_cpu include/linux/byteorder/generic.h:151 [inline] udf_free_inode+0x214/0x284 fs/udf/ialloc.c:-1 udf_evict_inode+0x2dc/0x388 fs/udf/inode.c:164 evict+0x3c8/0x810 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 do_unlinkat+0x360/0x4e8 fs/namei.c:4405 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4434 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the physical page: page:000000004c84dd84 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14200f flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffc00040803c8 fffffc00040803c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00010200fa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff00010200fa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff00010200fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff00010200fb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff00010200fc00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_free_inode+0x1d0/0x284 fs/udf/ialloc.c:41 Modules linked in: CPU: 0 PID: 5803 Comm: syz.0.419 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] pc : udf_free_inode+0x1d0/0x284 fs/udf/ialloc.c:41 lr : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] lr : udf_free_inode+0x1d0/0x284 fs/udf/ialloc.c:41 sp : ffff8000208679d0 x29: ffff8000208679e0 x28: 1fffe0001c4aa1fe x27: dfff800000000000 x26: 1fffe0001f7a5ccf x25: ffff0000f2c88000 x24: dfff800000000000 x23: 0000000000008000 x22: 0000000061616161 x21: ffff0000fbd2e678 x20: ffff0000fbd2e000 x19: ffff0000e2550e28 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff800008042d90 x15: 0000000040000000 x14: 0000000000000002 x13: 0000000000ff0100 x12: 0000000000080000 x11: 000000000002ded7 x10: ffff8000216ab000 x9 : ffff800009809bf0 x8 : 000000000002ded8 x7 : 0000000000000004 x6 : ffff800008251e80 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008191794 x2 : 0000000000000001 x1 : 0000000061616161 x0 : 0000000000000000 Call trace: udf_updated_lvid fs/udf/udfdecl.h:125 [inline] udf_free_inode+0x1d0/0x284 fs/udf/ialloc.c:41 udf_evict_inode+0x2dc/0x388 fs/udf/inode.c:164 evict+0x3c8/0x810 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 do_unlinkat+0x360/0x4e8 fs/namei.c:4405 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4434 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 31761 hardirqs last enabled at (31761): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (31761): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (31760): [] __schedule+0x298/0x1b18 kernel/sched/core.c:6459 softirqs last enabled at (31456): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (31454): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_add_free_space fs/udf/balloc.c:137 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_table_free_blocks fs/udf/balloc.c:397 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_free_blocks+0x1104/0x138c fs/udf/balloc.c:686 Modules linked in: CPU: 0 PID: 5803 Comm: syz.0.419 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] pc : udf_add_free_space fs/udf/balloc.c:137 [inline] pc : udf_table_free_blocks fs/udf/balloc.c:397 [inline] pc : udf_free_blocks+0x1104/0x138c fs/udf/balloc.c:686 lr : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] lr : udf_add_free_space fs/udf/balloc.c:137 [inline] lr : udf_table_free_blocks fs/udf/balloc.c:397 [inline] lr : udf_free_blocks+0x1104/0x138c fs/udf/balloc.c:686 sp : ffff8000208677a0 x29: ffff800020867970 x28: ffff70000410cf0c x27: ffff800020867860 x26: ffff0000e2550ce0 x25: 0000000000000000 x24: dfff800000000000 x23: 1fffe0001c4aa19c x22: 0000000000000001 x21: 0000000000000023 x20: ffff0000f6f5f01f x19: 0000000061616161 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff8000082ca408 x15: 0000000040000000 x14: 0000000000000002 x13: 0000000000ff0100 x12: 0000000000080000 x11: 0000000000045268 x10: ffff8000216ab000 x9 : ffff800009804840 x8 : 0000000000045269 x7 : 0000000000000000 x6 : ffff800009803ec8 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082c98a0 x2 : ffff0000d9c4b780 x1 : 0000000061616161 x0 : 0000000000000000 Call trace: udf_updated_lvid fs/udf/udfdecl.h:125 [inline] udf_add_free_space fs/udf/balloc.c:137 [inline] udf_table_free_blocks fs/udf/balloc.c:397 [inline] udf_free_blocks+0x1104/0x138c fs/udf/balloc.c:686 udf_free_inode+0x1ac/0x284 fs/udf/ialloc.c:45 udf_evict_inode+0x2dc/0x388 fs/udf/inode.c:164 evict+0x3c8/0x810 fs/inode.c:705 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 do_unlinkat+0x360/0x4e8 fs/namei.c:4405 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4434 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 31761 hardirqs last enabled at (31761): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (31761): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (31760): [] __schedule+0x298/0x1b18 kernel/sched/core.c:6459 softirqs last enabled at (31456): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (31454): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_add_free_space fs/udf/balloc.c:137 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_table_prealloc_blocks fs/udf/balloc.c:566 [inline] WARNING: CPU: 0 PID: 5803 at fs/udf/udfdecl.h:127 udf_prealloc_blocks+0xa74/0xc84 fs/udf/balloc.c:710 Modules linked in: CPU: 0 PID: 5803 Comm: syz.0.419 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] pc : udf_add_free_space fs/udf/balloc.c:137 [inline] pc : udf_table_prealloc_blocks fs/udf/balloc.c:566 [inline] pc : udf_prealloc_blocks+0xa74/0xc84 fs/udf/balloc.c:710 lr : udf_updated_lvid fs/udf/udfdecl.h:125 [inline] lr : udf_add_free_space fs/udf/balloc.c:137 [inline] lr : udf_table_prealloc_blocks fs/udf/balloc.c:566 [inline] lr : udf_prealloc_blocks+0xa74/0xc84 fs/udf/balloc.c:710 sp : ffff800020867120 x29: ffff8000208672a0 x28: ffff70000410ce34 x27: 1fffe0001f7a5ccf x26: ffff0000fbd2e678 x25: ffff0000fbd2e000 x24: ffff0000f2c88000 x23: ffff0000e2551490 x22: dfff800000000000 x21: ffff0000f6f5f01f x20: 0000000000000006 x19: 0000000061616161 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082ca408 x15: 0000000000000002 x14: 0000000000000001 x13: 0000000000ff0100 x12: 0000000000080000 x11: 0000000000006240 x10: ffff8000216ab000 x9 : ffff80000980553c x8 : 0000000000006241 x7 : 0000000000000030 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff800020867098 x1 : 0000000061616161 x0 : 0000000000000000 Call trace: udf_updated_lvid fs/udf/udfdecl.h:125 [inline] udf_add_free_space fs/udf/balloc.c:137 [inline] udf_table_prealloc_blocks fs/udf/balloc.c:566 [inline] udf_prealloc_blocks+0xa74/0xc84 fs/udf/balloc.c:710 udf_prealloc_extents fs/udf/inode.c:909 [inline] inode_getblk fs/udf/inode.c:768 [inline] udf_get_block+0x16b4/0x32e8 fs/udf/inode.c:359 __block_write_begin_int+0x34c/0x13b8 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x98/0x11c fs/buffer.c:2102 udf_write_begin+0x44/0x88 fs/udf/inode.c:212 generic_perform_write+0x230/0x4b0 mm/filemap.c:3846 __generic_file_write_iter+0x168/0x37c mm/filemap.c:3974 udf_file_write_iter+0x218/0x564 fs/udf/file.c:164 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ac/0x7c4 fs/read_write.c:584 ksys_write+0x120/0x210 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 31761 hardirqs last enabled at (31761): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (31761): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (31760): [] __schedule+0x298/0x1b18 kernel/sched/core.c:6459 softirqs last enabled at (31456): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (31454): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- UDF-fs: error (device loop0): udf_truncate_tail_extent: Extent after EOF in inode 1368