Title | Replies (including bot) | Last reply |
---|---|---|
KASAN: use-after-free Read in ext4_xattr_set_entry (3) | 0 (1) | 2020/03/09 05:43 |
syzbot |
sign-in | mailing list | source | docs |
Title | Replies (including bot) | Last reply |
---|---|---|
KASAN: use-after-free Read in ext4_xattr_set_entry (3) | 0 (1) | 2020/03/09 05:43 |
================================================================== BUG: KASAN: use-after-free in memmove include/linux/string.h:421 [inline] BUG: KASAN: use-after-free in ext4_xattr_set_entry+0xb72/0x37b0 fs/ext4/xattr.c:1718 Read of size 4 at addr ffff888077fd6ffe by task syz-executor.2/24792 CPU: 0 PID: 24792 Comm: syz-executor.2 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memmove+0x20/0x60 mm/kasan/common.c:94 memmove include/linux/string.h:421 [inline] ext4_xattr_set_entry+0xb72/0x37b0 fs/ext4/xattr.c:1718 ext4_xattr_ibody_set+0x78/0x2b0 fs/ext4/xattr.c:2223 ext4_xattr_set_handle+0x8f9/0x1140 fs/ext4/xattr.c:2379 ext4_initxattrs+0xb5/0x120 fs/ext4/xattr_security.c:43 security_inode_init_security+0x1c4/0x370 security/security.c:1052 __ext4_new_inode+0x43bb/0x5390 fs/ext4/ialloc.c:1175 ext4_symlink+0x4b0/0xe10 fs/ext4/namei.c:3303 vfs_symlink fs/namei.c:3953 [inline] vfs_symlink+0x453/0x6a0 fs/namei.c:3939 do_symlinkat+0x258/0x2c0 fs/namei.c:3980 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c8b7 Code: Bad RIP value. RSP: 002b:00007ffd455ab9f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c8b7 RDX: 00007ffd455aba97 RSI: 00000000004c268b RDI: 00007ffd455aba80 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000017 R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000001 R13: 00007ffd455aba30 R14: 0000000000000000 R15: 00007ffd455aba40 The buggy address belongs to the page: page:ffffea0001dff580 refcount:2 mapcount:0 mapping:0000000091409f46 index:0x421 mapping->a_ops:def_blk_aops flags: 0xfffe000000203a(referenced|dirty|lru|active|private) raw: 00fffe000000203a ffffea000198e508 ffffea00016b3ac8 ffff888217d0aba0 raw: 0000000000000421 ffff888047e20868 00000002ffffffff ffff88821bbbc000 page dumped because: kasan: bad access detected page->mem_cgroup:ffff88821bbbc000 Memory state around the buggy address: ffff888077fd6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077fd6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888077fd7000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888077fd7080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888077fd7100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/07/05 08:31 | upstream | 7cc2a8ea1048 | 51095195 | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2020/06/29 19:26 | upstream | 4e99b32169e8 | a2cdad9d | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2020/04/28 06:57 | upstream | 51184ae37e05 | 0ce7569e | .config | console log | report | ci-upstream-kasan-gce-smack-root | |||||
2020/03/08 14:27 | upstream | c20037652700 | 2e9971bb | .config | console log | report | ci-upstream-kasan-gce-root |