syzkaller login: [ 30.854156] BUG: Bad rss-counter state mm:00000000a6cc2120 type:MM_FILEPAGES val:33 [ 30.855774] BUG: Bad rss-counter state mm:00000000a6cc2120 type:MM_ANONPAGES val:22 [ 31.016489] ================================================================== [ 31.017411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.018367] Read of size 8 at addr ffff88801a35aa50 by task sshd/222 [ 31.019135] [ 31.019537] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.020420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.021407] Call Trace: [ 31.021735] [ 31.022020] dump_stack_lvl+0x91/0xf0 [ 31.022508] print_report+0xcc/0x620 [ 31.023008] ? __virt_addr_valid+0x102/0x340 [ 31.023590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024836] kasan_report+0xbe/0xf0 [ 31.025309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.025936] vma_interval_tree_remove+0xc75/0xec0 [ 31.026547] vma_prepare+0xc54/0x11a0 [ 31.027024] __split_vma+0x5af/0x950 [ 31.027514] ? __pfx___split_vma+0x10/0x10 [ 31.028044] ? find_held_lock+0x2c/0x110 [ 31.028574] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.029139] ? lock_is_held_type+0x9f/0x120 [ 31.029675] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.030285] ? mtree_range_walk+0x632/0x900 [ 31.030840] ? mas_walk+0x5c7/0x7c0 [ 31.031319] do_vmi_munmap+0x1f1/0x2b0 [ 31.031823] mmap_region+0x1f9/0x2660 [ 31.032308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.032824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.033549] ? __pfx_lock_acquire+0x10/0x10 [ 31.034092] ? __pfx_mmap_region+0x10/0x10 [ 31.034632] ? security_mmap_addr+0x7d/0xa0 [ 31.035162] ? get_unmapped_area+0x1f5/0x3f0 [ 31.035731] do_mmap+0x854/0xf00 [ 31.036177] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.036677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.037249] ksys_mmap_pgoff+0x3af/0x500 [ 31.037767] do_syscall_64+0x3f/0x90 [ 31.038250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038899] RIP: 0033:0x7f7242e38d82 [ 31.039359] 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 [ 31.041499] RSP: 002b:00007ffe981ee658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.042408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7242e38d82 [ 31.043272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7242272000 [ 31.044176] RBP: 00007f7242272000 R08: 0000000000000009 R09: 0000000000001000 [ 31.045064] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594ceb62ec0 [ 31.045925] R13: 00007ffe981ee670 R14: 00007ffe981ee6a0 R15: 00007ffe981eea00 [ 31.046797] [ 31.047091] [ 31.047306] Allocated by task 215: [ 31.047755] kasan_save_stack+0x22/0x50 [ 31.048278] kasan_set_track+0x25/0x30 [ 31.048778] __kasan_slab_alloc+0x59/0x70 [ 31.049317] kmem_cache_alloc+0x16b/0x370 [ 31.049851] vm_area_dup+0x20/0x160 [ 31.050307] __split_vma+0x170/0x950 [ 31.050781] split_vma+0xc6/0x110 [ 31.051228] mprotect_fixup+0x8d2/0xb30 [ 31.051744] do_mprotect_pkey+0x87e/0xd40 [ 31.052284] __x64_sys_mprotect+0x78/0xc0 [ 31.052808] do_syscall_64+0x3f/0x90 [ 31.053285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053932] [ 31.054153] Freed by task 215: [ 31.054551] kasan_save_stack+0x22/0x50 [ 31.055062] kasan_set_track+0x25/0x30 [ 31.055583] kasan_save_free_info+0x2b/0x50 [ 31.056118] __kasan_slab_free+0x10a/0x190 [ 31.056654] kmem_cache_free+0x10d/0x4d0 [ 31.057169] rcu_core+0x8c8/0x2860 [ 31.057616] __do_softirq+0x1b7/0x7d4 [ 31.058105] [ 31.058322] Last potentially related work creation: [ 31.058916] kasan_save_stack+0x22/0x50 [ 31.059425] __kasan_record_aux_stack+0x8e/0xa0 [ 31.060003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.060696] remove_vma+0x139/0x170 [ 31.061153] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.061714] do_vmi_munmap+0x1f1/0x2b0 [ 31.062200] __vm_munmap+0x138/0x3a0 [ 31.062667] __x64_sys_munmap+0x59/0x80 [ 31.063170] do_syscall_64+0x3f/0x90 [ 31.063668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064323] [ 31.064540] The buggy address belongs to the object at ffff88801a35a9f8 [ 31.064540] which belongs to the cache vm_area_struct of size 168 [ 31.066023] The buggy address is located 88 bytes inside of [ 31.066023] freed 168-byte region [ffff88801a35a9f8, ffff88801a35aaa0) [ 31.067445] [ 31.067663] The buggy address belongs to the physical page: [ 31.068340] page:00000000450f7ef9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a35a [ 31.069442] memcg:ffff88801a35b001 [ 31.069881] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.070530] page_type: 0xffffffff() [ 31.070997] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.071946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a35b001 [ 31.072890] page dumped because: kasan: bad access detected [ 31.073568] [ 31.073788] Memory state around the buggy address: [ 31.074373] ffff88801a35a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.075254] ffff88801a35a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.076165] >ffff88801a35aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.077056] ^ [ 31.077784] ffff88801a35aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.078673] ffff88801a35ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079573] ================================================================== [ 31.080550] Disabling lock debugging due to kernel taint [ 33.056165] BUG: Bad rss-counter state mm:000000003e6ea328 type:MM_FILEPAGES val:33 [ 33.057802] BUG: Bad rss-counter state mm:000000003e6ea328 type:MM_ANONPAGES val:22 [ 33.602019] BUG: Bad rss-counter state mm:0000000028ace705 type:MM_FILEPAGES val:33 [ 33.603252] BUG: Bad rss-counter state mm:0000000028ace705 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60362' (ECDSA) to the list of known hosts. 2023/06/20 20:24:30 fuzzer started 2023/06/20 20:24:30 dialing manager at localhost:36067 2023/06/20 20:24:30 checking machine... 2023/06/20 20:24:30 checking revisions... [ 34.235225] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:24:30 testing simple program... [ 34.282757] cgroup: Unknown subsys name 'net' [ 34.369857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:24:30 Registers: info registers vcpu 0 RAX=ffffed100d9c5729 RBX=ffff88806ce2b940 RCX=ffffffff812e0473 RDX=ffffed100d9c5729 RSI=0000000000000004 RDI=ffff88806ce2b940 RBP=ffffed100d9c5728 RSP=ffff88806ce09df8 R8 =0000000000000000 R9 =ffffed100d9c5728 R10=ffff88806ce2b943 R11=ffff88806ce09ff8 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff8180f12f RFL=00000046 [---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 00007fcd5303e900 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=00007fcd5246a790 CR3=00000000144e6000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=30828f9afdfc6aa400000000000ae988 XMM05=61f19abaa512c58d0000000000131ac8 XMM06=59d5b690e0af863b0000000000130c10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016737c60 RCX=0000000000000000 RDX=ffff888016b20000 RSI=0000000000000008 RDI=ffff888016737c00 RBP=0000000000000008 RSP=ffff88801c9bfdf8 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000400 R11=00000000000b6a61 R12=ffff888016737c00 R13=0000000000000040 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff818e8d92 RFL=00000293 [--S-A-C] 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 00007f3025ee8900 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=00007f30264a00b0 CR3=0000000019e84000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000