syzkaller login: [ 38.721670] BUG: Bad rss-counter state mm:00000000fec925cb type:MM_FILEPAGES val:33 [ 38.723086] BUG: Bad rss-counter state mm:00000000fec925cb type:MM_ANONPAGES val:22 [ 38.875004] ================================================================== [ 38.875918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876843] Read of size 8 at addr ffff888016ac8880 by task sshd/219 [ 38.877613] [ 38.877830] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879782] Call Trace: [ 38.880104] [ 38.880420] dump_stack_lvl+0x91/0xf0 [ 38.880904] print_report+0xcc/0x620 [ 38.881387] ? __virt_addr_valid+0x102/0x340 [ 38.881928] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882542] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883192] kasan_report+0xbe/0xf0 [ 38.883659] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884271] vma_interval_tree_remove+0xc75/0xec0 [ 38.884873] vma_prepare+0xc54/0x11a0 [ 38.885347] __split_vma+0x5af/0x950 [ 38.885819] ? __pfx___split_vma+0x10/0x10 [ 38.886344] ? find_held_lock+0x2c/0x110 [ 38.886875] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887437] ? lock_is_held_type+0x9f/0x120 [ 38.887972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888579] ? mtree_range_walk+0x632/0x900 [ 38.889123] ? mas_walk+0x5c7/0x7c0 [ 38.889596] do_vmi_munmap+0x1f1/0x2b0 [ 38.890087] mmap_region+0x1f9/0x2660 [ 38.890569] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891801] ? __pfx_lock_acquire+0x10/0x10 [ 38.892332] ? __pfx_mmap_region+0x10/0x10 [ 38.892861] ? security_mmap_addr+0x7d/0xa0 [ 38.893384] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893926] do_mmap+0x854/0xf00 [ 38.894359] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895424] ksys_mmap_pgoff+0x3af/0x500 [ 38.895925] do_syscall_64+0x3f/0x90 [ 38.896402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897045] RIP: 0033:0x7f1b8bc54d82 [ 38.897502] 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 [ 38.899635] RSP: 002b:00007fffa6aa9358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b8bc54d82 [ 38.901366] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b8b08e000 [ 38.902207] RBP: 00007f1b8b08e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903066] R10: 0000000000000812 R11: 0000000000000206 R12: 000056106cba5ec0 [ 38.903905] R13: 00007fffa6aa9370 R14: 00007fffa6aa93a0 R15: 00007fffa6aa9700 [ 38.904777] [ 38.905066] [ 38.905279] Allocated by task 212: [ 38.905706] kasan_save_stack+0x22/0x50 [ 38.906208] kasan_set_track+0x25/0x30 [ 38.906717] __kasan_slab_alloc+0x59/0x70 [ 38.907234] kmem_cache_alloc+0x16b/0x370 [ 38.907744] vm_area_dup+0x20/0x160 [ 38.908196] __split_vma+0x170/0x950 [ 38.908661] split_vma+0xc6/0x110 [ 38.909096] mprotect_fixup+0x8d2/0xb30 [ 38.909595] do_mprotect_pkey+0x87e/0xd40 [ 38.910115] __x64_sys_mprotect+0x78/0xc0 [ 38.910656] do_syscall_64+0x3f/0x90 [ 38.911132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911769] [ 38.911984] Freed by task 203: [ 38.912376] kasan_save_stack+0x22/0x50 [ 38.912871] kasan_set_track+0x25/0x30 [ 38.913359] kasan_save_free_info+0x2b/0x50 [ 38.913889] __kasan_slab_free+0x10a/0x190 [ 38.914418] kmem_cache_free+0x10d/0x4d0 [ 38.914928] rcu_core+0x8c8/0x2860 [ 38.915369] __do_softirq+0x1b7/0x7d4 [ 38.915847] [ 38.916062] Last potentially related work creation: [ 38.916643] kasan_save_stack+0x22/0x50 [ 38.917142] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918355] remove_vma+0x139/0x170 [ 38.918816] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919370] do_vmi_munmap+0x1f1/0x2b0 [ 38.919851] __vm_munmap+0x138/0x3a0 [ 38.920312] __x64_sys_munmap+0x59/0x80 [ 38.920807] do_syscall_64+0x3f/0x90 [ 38.921280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921913] [ 38.922127] Second to last potentially related work creation: [ 38.922804] kasan_save_stack+0x22/0x50 [ 38.923306] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924524] remove_vma+0x139/0x170 [ 38.924974] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925528] do_vmi_munmap+0x1f1/0x2b0 [ 38.926013] __vm_munmap+0x138/0x3a0 [ 38.926475] elf_map+0x26f/0x310 [ 38.926929] load_elf_binary+0xd82/0x5030 [ 38.927455] bprm_execve+0x803/0x1940 [ 38.927922] do_execveat_common+0x734/0x8e0 [ 38.928441] __x64_sys_execve+0x93/0xc0 [ 38.928927] do_syscall_64+0x3f/0x90 [ 38.929400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930040] [ 38.930253] The buggy address belongs to the object at ffff888016ac8828 [ 38.930253] which belongs to the cache vm_area_struct of size 168 [ 38.931729] The buggy address is located 88 bytes inside of [ 38.931729] freed 168-byte region [ffff888016ac8828, ffff888016ac88d0) [ 38.933132] [ 38.933346] The buggy address belongs to the physical page: [ 38.933999] page:00000000b753471e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac8 [ 38.935091] memcg:ffff88800c782601 [ 38.935513] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936210] page_type: 0xffffffff() [ 38.936662] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.937574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c782601 [ 38.938482] page dumped because: kasan: bad access detected [ 38.939151] [ 38.939364] Memory state around the buggy address: [ 38.939944] ffff888016ac8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.940792] ffff888016ac8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.941645] >ffff888016ac8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.942489] ^ [ 38.942920] ffff888016ac8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.943774] ffff888016ac8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.944615] ================================================================== [ 38.945686] Disabling lock debugging due to kernel taint [ 41.049107] BUG: Bad rss-counter state mm:000000001128d063 type:MM_FILEPAGES val:33 [ 41.050264] BUG: Bad rss-counter state mm:000000001128d063 type:MM_ANONPAGES val:22 [ 41.511709] BUG: Bad rss-counter state mm:00000000fe622cbd type:MM_FILEPAGES val:33 [ 41.512863] BUG: Bad rss-counter state mm:00000000fe622cbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63788' (ECDSA) to the list of known hosts. 2023/06/20 14:11:08 fuzzer started 2023/06/20 14:11:08 dialing manager at localhost:36067 2023/06/20 14:11:08 checking machine... 2023/06/20 14:11:08 checking revisions... [ 42.167530] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:11:08 testing simple program... [ 42.218233] cgroup: Unknown subsys name 'net' [ 42.272763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007faabb161477 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800e8f79d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801c9aed10 RIP=ffffffff814c859b RFL=00000282 [--S----] 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 00007faabac6e900 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=00007ffe97f3c000 CR3=00000000099b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fb2d7fc1950 CR3=000000000f012000 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=2038303a31313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000