syzkaller login: [ 31.221711] BUG: Bad rss-counter state mm:00000000955647cf type:MM_FILEPAGES val:33 [ 31.222902] BUG: Bad rss-counter state mm:00000000955647cf type:MM_ANONPAGES val:22 [ 31.376046] ================================================================== [ 31.376939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.377878] Read of size 8 at addr ffff88800ca9eed8 by task sshd/220 [ 31.378726] [ 31.378992] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.379867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.380850] Call Trace: [ 31.381167] [ 31.381451] dump_stack_lvl+0x91/0xf0 [ 31.381953] print_report+0xcc/0x620 [ 31.382446] ? __virt_addr_valid+0x102/0x340 [ 31.383029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.384265] kasan_report+0xbe/0xf0 [ 31.384742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385363] vma_interval_tree_remove+0xc75/0xec0 [ 31.385964] vma_prepare+0xc54/0x11a0 [ 31.386441] __split_vma+0x5af/0x950 [ 31.386914] ? __pfx___split_vma+0x10/0x10 [ 31.387467] ? find_held_lock+0x2c/0x110 [ 31.387992] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.388549] ? lock_is_held_type+0x9f/0x120 [ 31.389093] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.389693] ? mtree_range_walk+0x632/0x900 [ 31.390243] ? mas_walk+0x5c7/0x7c0 [ 31.390719] do_vmi_munmap+0x1f1/0x2b0 [ 31.391242] mmap_region+0x1f9/0x2660 [ 31.391737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.392242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.392956] ? __pfx_lock_acquire+0x10/0x10 [ 31.393492] ? __pfx_mmap_region+0x10/0x10 [ 31.394023] ? security_mmap_addr+0x7d/0xa0 [ 31.394550] ? get_unmapped_area+0x1f5/0x3f0 [ 31.395129] do_mmap+0x854/0xf00 [ 31.395568] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.396069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.396623] ksys_mmap_pgoff+0x3af/0x500 [ 31.397132] do_syscall_64+0x3f/0x90 [ 31.397610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398261] RIP: 0033:0x7f5383881d82 [ 31.398716] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.400859] RSP: 002b:00007ffd242c8e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.401765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5383881d82 [ 31.402618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5382cbb000 [ 31.403509] RBP: 00007f5382cbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.404373] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636e8c4aec0 [ 31.405233] R13: 00007ffd242c8e90 R14: 00007ffd242c8ec0 R15: 00007ffd242c9220 [ 31.406106] [ 31.406402] [ 31.406621] Allocated by task 213: [ 31.407085] kasan_save_stack+0x22/0x50 [ 31.407589] kasan_set_track+0x25/0x30 [ 31.408084] __kasan_slab_alloc+0x59/0x70 [ 31.408613] kmem_cache_alloc+0x16b/0x370 [ 31.409130] vm_area_dup+0x20/0x160 [ 31.409587] __split_vma+0x170/0x950 [ 31.410052] split_vma+0xc6/0x110 [ 31.410499] mprotect_fixup+0x8d2/0xb30 [ 31.411045] do_mprotect_pkey+0x87e/0xd40 [ 31.411572] __x64_sys_mprotect+0x78/0xc0 [ 31.412093] do_syscall_64+0x3f/0x90 [ 31.412585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.413234] [ 31.413450] Freed by task 213: [ 31.413840] kasan_save_stack+0x22/0x50 [ 31.414339] kasan_set_track+0x25/0x30 [ 31.414835] kasan_save_free_info+0x2b/0x50 [ 31.415391] __kasan_slab_free+0x10a/0x190 [ 31.415922] kmem_cache_free+0x10d/0x4d0 [ 31.416427] rcu_core+0x8c8/0x2860 [ 31.416871] __do_softirq+0x1b7/0x7d4 [ 31.417349] [ 31.417565] Last potentially related work creation: [ 31.418146] kasan_save_stack+0x22/0x50 [ 31.418643] __kasan_record_aux_stack+0x8e/0xa0 [ 31.419244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.419881] remove_vma+0x139/0x170 [ 31.420334] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.420891] do_vmi_munmap+0x1f1/0x2b0 [ 31.421379] __vm_munmap+0x138/0x3a0 [ 31.421843] __x64_sys_munmap+0x59/0x80 [ 31.422342] do_syscall_64+0x3f/0x90 [ 31.422813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423495] [ 31.423713] The buggy address belongs to the object at ffff88800ca9ee80 [ 31.423713] which belongs to the cache vm_area_struct of size 168 [ 31.425190] The buggy address is located 88 bytes inside of [ 31.425190] freed 168-byte region [ffff88800ca9ee80, ffff88800ca9ef28) [ 31.426584] [ 31.426798] The buggy address belongs to the physical page: [ 31.427481] page:000000009fad65e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca9e [ 31.428545] memcg:ffff88800d836a01 [ 31.428964] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.429601] page_type: 0xffffffff() [ 31.430057] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.431002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d836a01 [ 31.431906] page dumped because: kasan: bad access detected [ 31.432563] [ 31.432781] Memory state around the buggy address: [ 31.433355] ffff88800ca9ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.434207] ffff88800ca9ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.435094] >ffff88800ca9ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.435930] ^ [ 31.436653] ffff88800ca9ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.437499] ffff88800ca9ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.438339] ================================================================== [ 31.439464] Disabling lock debugging due to kernel taint [ 32.915362] BUG: Bad rss-counter state mm:00000000fbe5e3c3 type:MM_FILEPAGES val:33 [ 32.916115] BUG: Bad rss-counter state mm:00000000fbe5e3c3 type:MM_ANONPAGES val:22 [ 33.311626] BUG: Bad rss-counter state mm:00000000fe46ab5f type:MM_FILEPAGES val:33 [ 33.312385] BUG: Bad rss-counter state mm:00000000fe46ab5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9269' (ECDSA) to the list of known hosts. 2023/06/20 13:49:56 fuzzer started 2023/06/20 13:49:56 dialing manager at localhost:36067 2023/06/20 13:49:56 checking machine... 2023/06/20 13:49:56 checking revisions... [ 33.914855] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:49:57 testing simple program... [ 33.946834] cgroup: Unknown subsys name 'net' [ 33.983494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:49:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1388 RSI=ffffffff84514288 RDI=ffff88806ce09b6c RBP=ffff88806ce09c40 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801ac917a0 RIP=ffffffff813ad549 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffea3c19b08 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007fc0c5d5151000005633938c6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100120efac RCX=0000000000000000 RDX=ffff88800ffd1b40 RSI=ffffffff81717e08 RDI=ffff888009077e00 RBP=ffff88801925d1d0 RSP=ffff888009077d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffef1a41000 R13=dffffc0000000000 R14=0000000000001255 R15=0000000000000040 RIP=ffffffff81717e1c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd71ff8a900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffef1a41000 CR3=0000000016a7c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=3251467ec3bcdbe774aa1fea526315c8 XMM05=000000000000000000000000000000ff XMM06=065146710e9c5c8b16aa134704060700 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000