syzkaller login: [ 73.204043] BUG: Bad rss-counter state mm:00000000a3711ba5 type:MM_FILEPAGES val:33 [ 73.205328] BUG: Bad rss-counter state mm:00000000a3711ba5 type:MM_ANONPAGES val:22 [ 73.374724] ================================================================== [ 73.375982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.376966] Read of size 8 at addr ffff8880099d8968 by task sshd/219 [ 73.377761] [ 73.377987] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 73.379064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.380106] Call Trace: [ 73.380437] [ 73.380739] dump_stack_lvl+0x91/0xf0 [ 73.381238] print_report+0xcc/0x620 [ 73.381747] ? __virt_addr_valid+0x102/0x340 [ 73.382296] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.382932] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.383552] kasan_report+0xbe/0xf0 [ 73.384062] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.384701] vma_interval_tree_remove+0xc75/0xec0 [ 73.385303] vma_prepare+0xc54/0x11a0 [ 73.385818] __split_vma+0x5af/0x950 [ 73.386287] ? __pfx___split_vma+0x10/0x10 [ 73.386820] ? find_held_lock+0x2c/0x110 [ 73.387355] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.387954] ? lock_is_held_type+0x9f/0x120 [ 73.388494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.389110] ? mtree_range_walk+0x632/0x900 [ 73.389669] ? mas_walk+0x5c7/0x7c0 [ 73.390140] do_vmi_munmap+0x1f1/0x2b0 [ 73.390655] mmap_region+0x1f9/0x2660 [ 73.391137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.391655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.392382] ? __pfx_lock_acquire+0x10/0x10 [ 73.392938] ? __pfx_mmap_region+0x10/0x10 [ 73.393471] ? security_mmap_addr+0x7d/0xa0 [ 73.394021] ? get_unmapped_area+0x1f5/0x3f0 [ 73.394577] do_mmap+0x854/0xf00 [ 73.395036] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.395669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.396461] ksys_mmap_pgoff+0x3af/0x500 [ 73.397082] do_syscall_64+0x3f/0x90 [ 73.397674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.398511] RIP: 0033:0x7f9165446d82 [ 73.399122] 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 [ 73.401752] RSP: 002b:00007ffc6dcb58f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.402673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9165446d82 [ 73.403530] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9164880000 [ 73.404410] RBP: 00007f9164880000 R08: 0000000000000009 R09: 0000000000001000 [ 73.405274] R10: 0000000000000812 R11: 0000000000000206 R12: 000055781d2d2ec0 [ 73.406164] R13: 00007ffc6dcb5910 R14: 00007ffc6dcb5940 R15: 00007ffc6dcb5ca0 [ 73.407040] [ 73.407335] [ 73.407554] Allocated by task 212: [ 73.408002] kasan_save_stack+0x22/0x50 [ 73.408515] kasan_set_track+0x25/0x30 [ 73.409021] __kasan_slab_alloc+0x59/0x70 [ 73.409543] kmem_cache_alloc+0x16b/0x370 [ 73.410085] vm_area_dup+0x20/0x160 [ 73.410548] __split_vma+0x170/0x950 [ 73.411029] split_vma+0xc6/0x110 [ 73.411465] mprotect_fixup+0x8d2/0xb30 [ 73.411986] do_mprotect_pkey+0x87e/0xd40 [ 73.412510] __x64_sys_mprotect+0x78/0xc0 [ 73.413040] do_syscall_64+0x3f/0x90 [ 73.413514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.414168] [ 73.414383] Freed by task 212: [ 73.414804] kasan_save_stack+0x22/0x50 [ 73.415311] kasan_set_track+0x25/0x30 [ 73.415843] kasan_save_free_info+0x2b/0x50 [ 73.416376] __kasan_slab_free+0x10a/0x190 [ 73.416928] kmem_cache_free+0x10d/0x4d0 [ 73.417556] rcu_core+0x8c8/0x2860 [ 73.418030] __do_softirq+0x1b7/0x7d4 [ 73.418514] [ 73.418766] Last potentially related work creation: [ 73.419361] kasan_save_stack+0x22/0x50 [ 73.419889] __kasan_record_aux_stack+0x8e/0xa0 [ 73.420465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.421114] remove_vma+0x139/0x170 [ 73.421588] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.422153] do_vmi_munmap+0x1f1/0x2b0 [ 73.422661] __vm_munmap+0x138/0x3a0 [ 73.423131] __x64_sys_munmap+0x59/0x80 [ 73.423663] do_syscall_64+0x3f/0x90 [ 73.424173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.424824] [ 73.425041] The buggy address belongs to the object at ffff8880099d8910 [ 73.425041] which belongs to the cache vm_area_struct of size 168 [ 73.426528] The buggy address is located 88 bytes inside of [ 73.426528] freed 168-byte region [ffff8880099d8910, ffff8880099d89b8) [ 73.427999] [ 73.428218] The buggy address belongs to the physical page: [ 73.428892] page:000000004773b5d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99d8 [ 73.429977] memcg:ffff8880099d9001 [ 73.430423] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.431081] page_type: 0xffffffff() [ 73.431547] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 73.432493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099d9001 [ 73.433429] page dumped because: kasan: bad access detected [ 73.434104] [ 73.434319] Memory state around the buggy address: [ 73.434917] ffff8880099d8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 73.435824] ffff8880099d8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 73.436713] >ffff8880099d8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.437566] ^ [ 73.438367] ffff8880099d8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 73.439243] ffff8880099d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.440180] ================================================================== [ 73.441309] Disabling lock debugging due to kernel taint [ 76.084759] BUG: Bad rss-counter state mm:00000000b7aa0a49 type:MM_FILEPAGES val:33 [ 76.085598] BUG: Bad rss-counter state mm:00000000b7aa0a49 type:MM_ANONPAGES val:22 [ 76.627720] BUG: Bad rss-counter state mm:00000000e1ba2f38 type:MM_FILEPAGES val:33 [ 76.628755] BUG: Bad rss-counter state mm:00000000e1ba2f38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64015' (ECDSA) to the list of known hosts. 2023/06/19 16:32:18 fuzzer started 2023/06/19 16:32:18 dialing manager at localhost:44161 2023/06/19 16:32:18 checking machine... 2023/06/19 16:32:18 checking revisions... [ 77.406146] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:32:19 testing simple program... [ 77.465315] cgroup: Unknown subsys name 'net' [ 77.517425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:31:35 Registers: info registers vcpu 0 RAX=1ffffffff0c97a7d RBX=0000000000000001 RCX=ffffffff864bd3e6 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd3ea R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f58 R15=ffff88806ce09a98 RIP=ffffffff81131118 RFL=00000216 [----AP-] 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=00007fff9f4ea388 CR3=000000000ebf0000 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=2038313a32333a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a32333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=1ffff11002dfbf0c RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888016fdf850 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ef8 RFL=00000206 [-----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 00007f09184e5900 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=00007fdeb77251e0 CR3=000000000c50a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000