syzkaller login: [ 31.316085] BUG: Bad rss-counter state mm:00000000a2bc416d type:MM_FILEPAGES val:33 [ 31.317289] BUG: Bad rss-counter state mm:00000000a2bc416d type:MM_ANONPAGES val:22 [ 31.355056] ================================================================== [ 31.356004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.357015] Read of size 8 at addr ffff88800ed23df0 by task sshd/227 [ 31.357907] [ 31.358116] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.359002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.359916] Call Trace: [ 31.360263] [ 31.360609] dump_stack_lvl+0x91/0xf0 [ 31.361113] print_report+0xcc/0x620 [ 31.361608] ? __virt_addr_valid+0x102/0x340 [ 31.362219] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363559] kasan_report+0xbe/0xf0 [ 31.364089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364824] vma_interval_tree_remove+0xc75/0xec0 [ 31.365517] vma_prepare+0xc54/0x11a0 [ 31.366074] __split_vma+0x5af/0x950 [ 31.366531] ? __pfx___split_vma+0x10/0x10 [ 31.367066] ? find_held_lock+0x2c/0x110 [ 31.367681] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.368408] ? lock_is_held_type+0x9f/0x120 [ 31.368941] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.369543] ? mtree_range_walk+0x632/0x900 [ 31.370097] ? mas_walk+0x5c7/0x7c0 [ 31.370560] do_vmi_munmap+0x1f1/0x2b0 [ 31.371049] mmap_region+0x1f9/0x2660 [ 31.371529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.372039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.372747] ? __pfx_lock_acquire+0x10/0x10 [ 31.373276] ? __pfx_mmap_region+0x10/0x10 [ 31.373809] ? security_mmap_addr+0x7d/0xa0 [ 31.374336] ? get_unmapped_area+0x1f5/0x3f0 [ 31.374880] do_mmap+0x854/0xf00 [ 31.375317] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.376374] ksys_mmap_pgoff+0x3af/0x500 [ 31.376877] do_syscall_64+0x3f/0x90 [ 31.377358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377992] RIP: 0033:0x7fe1e7226d82 [ 31.378433] 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 [ 31.380568] RSP: 002b:00007fffa5610368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.381473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1e7226d82 [ 31.382319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1e6660000 [ 31.383114] RBP: 00007fe1e6660000 R08: 0000000000000009 R09: 0000000000001000 [ 31.383910] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e0494df70 [ 31.384714] R13: 00007fffa5610380 R14: 00007fffa56103b0 R15: 00007fffa5610710 [ 31.385515] [ 31.385791] [ 31.385997] Allocated by task 220: [ 31.386398] kasan_save_stack+0x22/0x50 [ 31.386871] kasan_set_track+0x25/0x30 [ 31.387337] __kasan_slab_alloc+0x59/0x70 [ 31.387828] kmem_cache_alloc+0x16b/0x370 [ 31.388321] vm_area_dup+0x20/0x160 [ 31.388749] __split_vma+0x170/0x950 [ 31.389189] split_vma+0xc6/0x110 [ 31.389610] mprotect_fixup+0x8d2/0xb30 [ 31.390077] do_mprotect_pkey+0x87e/0xd40 [ 31.390565] __x64_sys_mprotect+0x78/0xc0 [ 31.391051] do_syscall_64+0x3f/0x90 [ 31.391504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392105] [ 31.392353] Freed by task 205: [ 31.392724] kasan_save_stack+0x22/0x50 [ 31.393197] kasan_set_track+0x25/0x30 [ 31.393662] kasan_save_free_info+0x2b/0x50 [ 31.394160] __kasan_slab_free+0x10a/0x190 [ 31.394656] kmem_cache_free+0x10d/0x4d0 [ 31.395134] rcu_core+0x8c8/0x2860 [ 31.395552] __do_softirq+0x1b7/0x7d4 [ 31.396000] [ 31.396213] Last potentially related work creation: [ 31.396762] kasan_save_stack+0x22/0x50 [ 31.397233] __kasan_record_aux_stack+0x8e/0xa0 [ 31.397767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.398369] remove_vma+0x139/0x170 [ 31.398792] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.399315] do_vmi_munmap+0x1f1/0x2b0 [ 31.399843] __vm_munmap+0x138/0x3a0 [ 31.400299] __x64_sys_munmap+0x59/0x80 [ 31.400763] do_syscall_64+0x3f/0x90 [ 31.401214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401819] [ 31.402024] Second to last potentially related work creation: [ 31.402661] kasan_save_stack+0x22/0x50 [ 31.403133] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.404281] remove_vma+0x139/0x170 [ 31.404702] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.405221] do_vmi_munmap+0x1f1/0x2b0 [ 31.405679] mmap_region+0x1f9/0x2660 [ 31.406124] do_mmap+0x854/0xf00 [ 31.406534] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.406992] ksys_mmap_pgoff+0x3af/0x500 [ 31.407459] do_syscall_64+0x3f/0x90 [ 31.407905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408535] [ 31.408740] The buggy address belongs to the object at ffff88800ed23d98 [ 31.408740] which belongs to the cache vm_area_struct of size 168 [ 31.410109] The buggy address is located 88 bytes inside of [ 31.410109] freed 168-byte region [ffff88800ed23d98, ffff88800ed23e40) [ 31.411417] [ 31.411620] The buggy address belongs to the physical page: [ 31.412253] page:000000007797363c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed23 [ 31.413269] memcg:ffff888013f1db01 [ 31.413668] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.414340] page_type: 0xffffffff() [ 31.414789] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365fc0 dead000000000003 [ 31.415687] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f1db01 [ 31.416567] page dumped because: kasan: bad access detected [ 31.417203] [ 31.417410] Memory state around the buggy address: [ 31.417970] ffff88800ed23c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.418814] ffff88800ed23d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.419645] >ffff88800ed23d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.420495] ^ [ 31.421290] ffff88800ed23e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.422130] ffff88800ed23e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.422946] ================================================================== [ 31.423865] Disabling lock debugging due to kernel taint [ 33.752254] BUG: Bad rss-counter state mm:00000000208118bc type:MM_FILEPAGES val:33 [ 33.753229] BUG: Bad rss-counter state mm:00000000208118bc type:MM_ANONPAGES val:22 [ 34.262984] BUG: Bad rss-counter state mm:000000008a1bfd10 type:MM_FILEPAGES val:33 [ 34.264365] BUG: Bad rss-counter state mm:000000008a1bfd10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52251' (ECDSA) to the list of known hosts. 2023/06/20 20:02:44 fuzzer started 2023/06/20 20:02:44 dialing manager at localhost:36067 2023/06/20 20:02:45 checking machine... 2023/06/20 20:02:45 checking revisions... [ 34.951795] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:02:45 testing simple program... [ 34.995483] cgroup: Unknown subsys name 'net' [ 35.032084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:02:44 Registers: info registers vcpu 0 RAX=1ffff11001b4e25f RBX=ffff88800da712c8 RCX=1ffff110019c02ac RDX=dffffc0000000000 RSI=ffff88800e27d130 RDI=ffff88800da712f8 RBP=ffff88800f1cbeb8 RSP=ffff88800f71fc08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e27d120 R13=0000000000000000 R14=ffff888016433898 R15=ffff888016433850 RIP=ffffffff8184767e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0b42f8d900 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=00007f0b435450b0 CR3=0000000016d90000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fdb27a7f2a0 CR3=000000000dcf8000 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=135ea7170e6f0db5f843b4c26109998c XMM02=000000000011b0b0ec2efd57dc4c00df XMM03=0000000000121a503f1cfcafbc5e3091 XMM04=cb3e860ebabf909000000000000ae988 XMM05=16bbfc4fa606b6250000000000132928 XMM06=e8008b1642ea3e6000000000001327b0 XMM07=e042d86d42eb936e0000000000121d28 XMM08=3f1cfcafbc5e3091000000000011b110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000