syzkaller login: [ 34.193248] BUG: Bad rss-counter state mm:00000000e357eb49 type:MM_FILEPAGES val:33 [ 34.194512] BUG: Bad rss-counter state mm:00000000e357eb49 type:MM_ANONPAGES val:22 [ 34.231765] ================================================================== [ 34.232697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.233644] Read of size 8 at addr ffff88800cba83f8 by task sshd/220 [ 34.234501] [ 34.234719] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.235589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.236576] Call Trace: [ 34.236895] <TASK> [ 34.237204] dump_stack_lvl+0x91/0xf0 [ 34.237695] print_report+0xcc/0x620 [ 34.238186] ? __virt_addr_valid+0x102/0x340 [ 34.238740] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.239356] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.239971] kasan_report+0xbe/0xf0 [ 34.240447] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.241071] vma_interval_tree_remove+0xc75/0xec0 [ 34.241681] vma_prepare+0xc54/0x11a0 [ 34.242166] __split_vma+0x5af/0x950 [ 34.242635] ? __pfx___split_vma+0x10/0x10 [ 34.243168] ? find_held_lock+0x2c/0x110 [ 34.243690] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.244260] ? lock_is_held_type+0x9f/0x120 [ 34.244810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.245450] ? mtree_range_walk+0x632/0x900 [ 34.246010] ? mas_walk+0x5c7/0x7c0 [ 34.246482] do_vmi_munmap+0x1f1/0x2b0 [ 34.246983] mmap_region+0x1f9/0x2660 [ 34.247468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.247982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.248697] ? __pfx_lock_acquire+0x10/0x10 [ 34.249248] ? __pfx_mmap_region+0x10/0x10 [ 34.249778] ? security_mmap_addr+0x7d/0xa0 [ 34.250306] ? get_unmapped_area+0x1f5/0x3f0 [ 34.250862] do_mmap+0x854/0xf00 [ 34.251303] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.251805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.252369] ksys_mmap_pgoff+0x3af/0x500 [ 34.252879] do_syscall_64+0x3f/0x90 [ 34.253388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.254032] RIP: 0033:0x7efc19956d82 [ 34.254491] 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 [ 34.256622] RSP: 002b:00007ffc6b514268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.257536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc19956d82 [ 34.258395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc18d90000 [ 34.259247] RBP: 00007efc18d90000 R08: 0000000000000009 R09: 0000000000001000 [ 34.260113] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea76a78d90 [ 34.260980] R13: 00007ffc6b514280 R14: 00007ffc6b5142b0 R15: 00007ffc6b514610 [ 34.261898] </TASK> [ 34.262195] [ 34.262411] Allocated by task 212: [ 34.262848] kasan_save_stack+0x22/0x50 [ 34.263371] kasan_set_track+0x25/0x30 [ 34.263880] __kasan_slab_alloc+0x59/0x70 [ 34.264418] kmem_cache_alloc+0x16b/0x370 [ 34.264947] vm_area_dup+0x20/0x160 [ 34.265423] __split_vma+0x170/0x950 [ 34.265911] split_vma+0xc6/0x110 [ 34.266363] mprotect_fixup+0x8d2/0xb30 [ 34.266873] do_mprotect_pkey+0x87e/0xd40 [ 34.267395] __x64_sys_mprotect+0x78/0xc0 [ 34.267922] do_syscall_64+0x3f/0x90 [ 34.268401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.269052] [ 34.269278] Freed by task 212: [ 34.269672] kasan_save_stack+0x22/0x50 [ 34.270186] kasan_set_track+0x25/0x30 [ 34.270683] kasan_save_free_info+0x2b/0x50 [ 34.271223] __kasan_slab_free+0x10a/0x190 [ 34.271763] kmem_cache_free+0x10d/0x4d0 [ 34.272282] rcu_core+0x8c8/0x2860 [ 34.272743] __do_softirq+0x1b7/0x7d4 [ 34.273246] [ 34.273468] Last potentially related work creation: [ 34.274145] kasan_save_stack+0x22/0x50 [ 34.274650] __kasan_record_aux_stack+0x8e/0xa0 [ 34.275232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.275884] remove_vma+0x139/0x170 [ 34.276340] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.276912] do_vmi_munmap+0x1f1/0x2b0 [ 34.277410] __vm_munmap+0x138/0x3a0 [ 34.277879] __x64_sys_munmap+0x59/0x80 [ 34.278377] do_syscall_64+0x3f/0x90 [ 34.278851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.279499] [ 34.279725] The buggy address belongs to the object at ffff88800cba83a0 [ 34.279725] which belongs to the cache vm_area_struct of size 168 [ 34.281205] The buggy address is located 88 bytes inside of [ 34.281205] freed 168-byte region [ffff88800cba83a0, ffff88800cba8448) [ 34.282616] [ 34.282834] The buggy address belongs to the physical page: [ 34.283504] page:0000000075582dd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcba8 [ 34.284589] memcg:ffff888014443401 [ 34.285019] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.285681] page_type: 0xffffffff() [ 34.286134] raw: 0100000000000200 ffff88800879fc80 ffffea00003bcac0 dead00000000000c [ 34.287064] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014443401 [ 34.287976] page dumped because: kasan: bad access detected [ 34.288639] [ 34.288859] Memory state around the buggy address: [ 34.289450] ffff88800cba8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.290320] ffff88800cba8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.291194] >ffff88800cba8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.292060] ^ [ 34.292898] ffff88800cba8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.293783] ffff88800cba8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.294637] ================================================================== [ 34.295690] Disabling lock debugging due to kernel taint [ 36.148925] BUG: Bad rss-counter state mm:0000000037d64df7 type:MM_FILEPAGES val:33 [ 36.150496] BUG: Bad rss-counter state mm:0000000037d64df7 type:MM_ANONPAGES val:22 [ 36.567940] BUG: Bad rss-counter state mm:00000000c7cb9526 type:MM_FILEPAGES val:33 [ 36.569120] BUG: Bad rss-counter state mm:00000000c7cb9526 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7777' (ECDSA) to the list of known hosts. 2023/06/20 03:23:36 fuzzer started 2023/06/20 03:23:36 dialing manager at localhost:44161 2023/06/20 03:23:36 checking machine... 2023/06/20 03:23:36 checking revisions... [ 37.289142] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:23:36 testing simple program... [ 37.330908] cgroup: Unknown subsys name 'net' [ 37.374102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:23:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=1ffff110018bbf42 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800c5dfa20 RSP=ffff88800c5df958 R8 =ffffffff860d68fa R9 =ffff88800c5dfa08 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800c5dfa28 R13=ffff88800c5dfa10 R14=0000000000000005 R15=ffff88800c5df9c8 RIP=ffffffff81130b54 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 00007fd4733e9900 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=00007fd47339d01c CR3=000000000e206000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fff82bb0388 CR3=0000000009854000 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=2035333a33323a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a33323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000