syzkaller login: [ 30.925238] BUG: Bad rss-counter state mm:00000000627a94d0 type:MM_FILEPAGES val:33 [ 30.926142] BUG: Bad rss-counter state mm:00000000627a94d0 type:MM_ANONPAGES val:22 [ 31.037549] ================================================================== [ 31.038249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.038860] Read of size 8 at addr ffff88800e6e74e0 by task sshd/220 [ 31.039382] [ 31.039532] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.040117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.040773] Call Trace: [ 31.040990] [ 31.041186] dump_stack_lvl+0x91/0xf0 [ 31.041710] print_report+0xcc/0x620 [ 31.042042] ? __virt_addr_valid+0x102/0x340 [ 31.042422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.042831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.043244] kasan_report+0xbe/0xf0 [ 31.043564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044011] vma_interval_tree_remove+0xc75/0xec0 [ 31.044413] vma_prepare+0xc54/0x11a0 [ 31.044736] __split_vma+0x5af/0x950 [ 31.045054] ? __pfx___split_vma+0x10/0x10 [ 31.045406] ? find_held_lock+0x2c/0x110 [ 31.045772] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.046158] ? lock_is_held_type+0x9f/0x120 [ 31.046518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.046925] ? mtree_range_walk+0x632/0x900 [ 31.047299] ? mas_walk+0x5c7/0x7c0 [ 31.047620] do_vmi_munmap+0x1f1/0x2b0 [ 31.047963] mmap_region+0x1f9/0x2660 [ 31.048286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.048628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.049098] ? __pfx_lock_acquire+0x10/0x10 [ 31.049470] ? __pfx_mmap_region+0x10/0x10 [ 31.049844] ? security_mmap_addr+0x7d/0xa0 [ 31.050206] ? get_unmapped_area+0x1f5/0x3f0 [ 31.050584] do_mmap+0x854/0xf00 [ 31.050883] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.051216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.051588] ksys_mmap_pgoff+0x3af/0x500 [ 31.051918] do_syscall_64+0x3f/0x90 [ 31.052276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052753] RIP: 0033:0x7f7fc87a1d82 [ 31.053086] 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 [ 31.054677] RSP: 002b:00007ffe849249d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.055351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fc87a1d82 [ 31.055970] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fc7bdb000 [ 31.056588] RBP: 00007f7fc7bdb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.057201] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612db668f70 [ 31.057840] R13: 00007ffe849249f0 R14: 00007ffe84924a20 R15: 00007ffe84924d80 [ 31.058472] [ 31.058681] [ 31.058838] Allocated by task 213: [ 31.059150] kasan_save_stack+0x22/0x50 [ 31.059529] kasan_set_track+0x25/0x30 [ 31.059890] __kasan_slab_alloc+0x59/0x70 [ 31.060267] kmem_cache_alloc+0x16b/0x370 [ 31.060644] vm_area_dup+0x20/0x160 [ 31.060983] __split_vma+0x170/0x950 [ 31.061321] split_vma+0xc6/0x110 [ 31.061653] mprotect_fixup+0x8d2/0xb30 [ 31.062019] do_mprotect_pkey+0x87e/0xd40 [ 31.062398] __x64_sys_mprotect+0x78/0xc0 [ 31.062773] do_syscall_64+0x3f/0x90 [ 31.063129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063599] [ 31.063749] Freed by task 213: [ 31.064039] kasan_save_stack+0x22/0x50 [ 31.064418] kasan_set_track+0x25/0x30 [ 31.064752] kasan_save_free_info+0x2b/0x50 [ 31.065128] __kasan_slab_free+0x10a/0x190 [ 31.065515] kmem_cache_free+0x10d/0x4d0 [ 31.066040] rcu_core+0x8c8/0x2860 [ 31.066364] __do_softirq+0x1b7/0x7d4 [ 31.066690] [ 31.066835] Last potentially related work creation: [ 31.067238] kasan_save_stack+0x22/0x50 [ 31.067587] __kasan_record_aux_stack+0x8e/0xa0 [ 31.067969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.068410] remove_vma+0x139/0x170 [ 31.068727] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.069212] do_vmi_munmap+0x1f1/0x2b0 [ 31.069550] __vm_munmap+0x138/0x3a0 [ 31.069899] __x64_sys_munmap+0x59/0x80 [ 31.070230] do_syscall_64+0x3f/0x90 [ 31.070539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070970] [ 31.071111] The buggy address belongs to the object at ffff88800e6e7488 [ 31.071111] which belongs to the cache vm_area_struct of size 168 [ 31.072069] The buggy address is located 88 bytes inside of [ 31.072069] freed 168-byte region [ffff88800e6e7488, ffff88800e6e7530) [ 31.072999] [ 31.073149] The buggy address belongs to the physical page: [ 31.073631] page:0000000086816fa7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6e7 [ 31.074351] memcg:ffff88801a031c01 [ 31.074631] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075072] page_type: 0xffffffff() [ 31.075390] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.076033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a031c01 [ 31.076669] page dumped because: kasan: bad access detected [ 31.077141] [ 31.077292] Memory state around the buggy address: [ 31.077730] ffff88800e6e7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.078322] ffff88800e6e7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.078926] >ffff88800e6e7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079524] ^ [ 31.080052] ffff88800e6e7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.080660] ffff88800e6e7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081253] ================================================================== [ 31.082029] Disabling lock debugging due to kernel taint [ 32.524749] BUG: Bad rss-counter state mm:0000000057cba35f type:MM_FILEPAGES val:33 [ 32.525495] BUG: Bad rss-counter state mm:0000000057cba35f type:MM_ANONPAGES val:22 [ 32.899099] BUG: Bad rss-counter state mm:0000000098503488 type:MM_FILEPAGES val:33 [ 32.899845] BUG: Bad rss-counter state mm:0000000098503488 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10882' (ECDSA) to the list of known hosts. 2023/06/21 09:16:43 fuzzer started 2023/06/21 09:16:43 dialing manager at localhost:36067 2023/06/21 09:16:43 checking machine... 2023/06/21 09:16:43 checking revisions... [ 33.481283] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:16:43 testing simple program... [ 33.521094] cgroup: Unknown subsys name 'net' [ 33.559696] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:16:43 Registers: info registers vcpu 0 RAX=ffffffff811fc524 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002862f43 RSI=ffffffff811fc524 RDI=ffff888014317a88 RBP=ffff888014317a58 RSP=ffff8880143179b8 R8 =0000000000000001 R9 =ffff888014317a00 R10=0000000000038001 R11=00000000000229a3 R12=ffff888014317a88 R13=0000000000000000 R14=ffff88801415d1c0 R15=ffff88800e3eca00 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007f56c8156900 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=00007f56c756f6c0 CR3=000000000c5de000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ceeae5da9cf9eccd00000000000ae988 XMM05=e87893b27b03b4700000000000133388 XMM06=19e9129bd510f23500000000001324f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00007fe55a979580 RDI=0000000000000004 RBP=00005600a4725810 RSP=00007ffce82596b8 R8 =0000000000000007 R9 =00007ffce8252aa8 R10=00005600a472b2c0 R11=0000000000000246 R12=00007fe55a979340 R13=0000000000000000 R14=00007ffce8259ac0 R15=00007ffce8259870 RIP=00007fe55a98ec93 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe55a5cf900 00000000 00000000 GS =0000 0000000000000000 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=00007ffce8253000 CR3=000000001a2ee000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000