REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS warning (device loop4): vs-13060 reiserfs_update_sd_size: stat data of object [2 6 0x0 SD] (nlink == 1) not found (pos 1) ================================================================== BUG: KASAN: use-after-free in leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 Write of size 3936 at addr ffff0000f7297140 by task syz.4.24/4426 CPU: 1 PID: 4426 Comm: syz.4.24 Not tainted 6.1.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 memmove+0x60/0x90 mm/kasan/shadow.c:55 leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 leaf_copy_boundary_item+0x96c/0x1a34 fs/reiserfs/lbalance.c:199 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline] leaf_move_items+0xa0c/0x1f7c fs/reiserfs/lbalance.c:726 leaf_shift_left+0xc8/0x39c fs/reiserfs/lbalance.c:750 balance_leaf_paste_left_shift fs/reiserfs/do_balan.c:458 [inline] balance_leaf_paste_left fs/reiserfs/do_balan.c:592 [inline] balance_leaf_left fs/reiserfs/do_balan.c:613 [inline] balance_leaf+0x41c0/0xe860 fs/reiserfs/do_balan.c:1409 do_balance+0x27c/0x788 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1a20/0x45d8 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x340/0x13b4 fs/buffer.c:1991 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2775 generic_cont_expand_simple+0x160/0x258 fs/buffer.c:2347 reiserfs_setattr+0x5c8/0x101c fs/reiserfs/inode.c:3305 notify_change+0xb58/0xe1c fs/attr.c:499 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __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+0x58/0x168 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:00000000efcea92a refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x137297 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f7297000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000f7297080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000f7297100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000f7297180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000f7297200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Unable to handle kernel write to read-only memory at virtual address ffff00015dc20000 KASAN: maybe wild-memory-access in range [0xfffc000aee100000-0xfffc000aee100007] Mem abort info: ESR = 0x000000009600004f EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x0f: level 3 permission fault Data abort info: ISV = 0, ISS = 0x0000004f CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ab212000 [ffff00015dc20000] pgd=180000023fff8003, p4d=180000023fff8003, pud=180000023f012003, pmd=180000023ef23003, pte=006000019dc20783 Internal error: Oops: 000000009600004f [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4426 Comm: syz.4.24 Tainted: G B 6.1.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __memcpy+0x150/0x240 arch/arm64/lib/memcpy.S:173 lr : memmove+0x74/0x90 mm/kasan/shadow.c:58 sp : ffff80001efc6270 x29: ffff80001efc6270 x28: 0000000000000000 x27: ffff0000f7298000 x26: 0000000000000001 x25: 000000000000f140 x24: ffff0000f4e313c8 x23: ffff0000f7298018 x22: ffff800008d932a8 x21: ffff0000f72a70d0 x20: ffff0000f72a7140 x19: ffffffffffff1ec0 x18: 1fffe0003679c376 x17: 0000000000000000 x16: ffff800012272b80 x15: 0000000000000000 x14: 0000000000000000 x13: 9425511caa1603e0 x12: 3400006838786908 x11: d343fec891010016 x10: 940d16c42a1503e1 x9 : 5ac002c8340001f6 x8 : 94134b042a1603e1 x7 : b94001169100c108 x6 : 2a1f03e0f94002c8 x5 : ffff0000f7298f90 x4 : ffff0000f7299000 x3 : ffff00015dc1ffd0 x2 : ffffffff99678f30 x1 : ffff00015dc20080 x0 : ffff0000f72a70d0 Call trace: __memcpy+0x150/0x240 arch/arm64/lib/memcpy.S:172 leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 balance_leaf_paste_left_shift fs/reiserfs/do_balan.c:465 [inline] balance_leaf_paste_left fs/reiserfs/do_balan.c:592 [inline] balance_leaf_left fs/reiserfs/do_balan.c:613 [inline] balance_leaf+0x4dc0/0xe860 fs/reiserfs/do_balan.c:1409 do_balance+0x27c/0x788 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1a20/0x45d8 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x340/0x13b4 fs/buffer.c:1991 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2775 generic_cont_expand_simple+0x160/0x258 fs/buffer.c:2347 reiserfs_setattr+0x5c8/0x101c fs/reiserfs/inode.c:3305 notify_change+0xb58/0xe1c fs/attr.c:499 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __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+0x58/0x168 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 Code: a9011c66 a9411c26 a9022468 a9422428 (a9032c6a) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: a9011c66 stp x6, x7, [x3, #16] 4: a9411c26 ldp x6, x7, [x1, #16] 8: a9022468 stp x8, x9, [x3, #32] c: a9422428 ldp x8, x9, [x1, #32] * 10: a9032c6a stp x10, x11, [x3, #48] <-- trapping instruction