syzkaller login: [ 31.207192] BUG: Bad rss-counter state mm:0000000037c99e2b type:MM_FILEPAGES val:33 [ 31.208402] BUG: Bad rss-counter state mm:0000000037c99e2b type:MM_ANONPAGES val:22 [ 31.249465] ================================================================== [ 31.250468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.251443] Read of size 8 at addr ffff8880168dded8 by task sshd/221 [ 31.252231] [ 31.252449] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.253342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254337] Call Trace: [ 31.254677] [ 31.254992] dump_stack_lvl+0x91/0xf0 [ 31.255495] print_report+0xcc/0x620 [ 31.255992] ? __virt_addr_valid+0x102/0x340 [ 31.256554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257203] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257832] kasan_report+0xbe/0xf0 [ 31.258327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259013] vma_interval_tree_remove+0xc75/0xec0 [ 31.259618] vma_prepare+0xc54/0x11a0 [ 31.260096] __split_vma+0x5af/0x950 [ 31.260577] ? __pfx___split_vma+0x10/0x10 [ 31.261113] ? find_held_lock+0x2c/0x110 [ 31.261632] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262200] ? lock_is_held_type+0x9f/0x120 [ 31.262783] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.263386] ? mtree_range_walk+0x632/0x900 [ 31.263937] ? mas_walk+0x5c7/0x7c0 [ 31.264411] do_vmi_munmap+0x1f1/0x2b0 [ 31.264938] mmap_region+0x1f9/0x2660 [ 31.265428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266653] ? __pfx_lock_acquire+0x10/0x10 [ 31.267229] ? __pfx_mmap_region+0x10/0x10 [ 31.267759] ? security_mmap_addr+0x7d/0xa0 [ 31.268289] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268851] do_mmap+0x854/0xf00 [ 31.269292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270356] ksys_mmap_pgoff+0x3af/0x500 [ 31.270904] do_syscall_64+0x3f/0x90 [ 31.271384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272040] RIP: 0033:0x7f3ba7709d82 [ 31.272500] 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 [ 31.274679] RSP: 002b:00007fff9d84c068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ba7709d82 [ 31.276599] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ba6b43000 [ 31.277473] RBP: 00007f3ba6b43000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278319] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555febf02ec0 [ 31.279205] R13: 00007fff9d84c080 R14: 00007fff9d84c0b0 R15: 00007fff9d84c410 [ 31.280064] [ 31.280355] [ 31.280582] Allocated by task 214: [ 31.281012] kasan_save_stack+0x22/0x50 [ 31.281518] kasan_set_track+0x25/0x30 [ 31.282022] __kasan_slab_alloc+0x59/0x70 [ 31.282554] kmem_cache_alloc+0x16b/0x370 [ 31.283116] vm_area_dup+0x20/0x160 [ 31.283574] __split_vma+0x170/0x950 [ 31.284075] split_vma+0xc6/0x110 [ 31.284512] mprotect_fixup+0x8d2/0xb30 [ 31.285037] do_mprotect_pkey+0x87e/0xd40 [ 31.285553] __x64_sys_mprotect+0x78/0xc0 [ 31.286074] do_syscall_64+0x3f/0x90 [ 31.286547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287207] [ 31.287421] Freed by task 214: [ 31.287854] kasan_save_stack+0x22/0x50 [ 31.288363] kasan_set_track+0x25/0x30 [ 31.288867] kasan_save_free_info+0x2b/0x50 [ 31.289401] __kasan_slab_free+0x10a/0x190 [ 31.289932] kmem_cache_free+0x10d/0x4d0 [ 31.290435] rcu_core+0x8c8/0x2860 [ 31.290877] __do_softirq+0x1b7/0x7d4 [ 31.291357] [ 31.291572] Last potentially related work creation: [ 31.292199] kasan_save_stack+0x22/0x50 [ 31.292716] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.293925] remove_vma+0x139/0x170 [ 31.294375] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.294929] do_vmi_munmap+0x1f1/0x2b0 [ 31.295421] __vm_munmap+0x138/0x3a0 [ 31.295924] __x64_sys_munmap+0x59/0x80 [ 31.296424] do_syscall_64+0x3f/0x90 [ 31.296965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297611] [ 31.297824] The buggy address belongs to the object at ffff8880168dde80 [ 31.297824] which belongs to the cache vm_area_struct of size 168 [ 31.299299] The buggy address is located 88 bytes inside of [ 31.299299] freed 168-byte region [ffff8880168dde80, ffff8880168ddf28) [ 31.300800] [ 31.301019] The buggy address belongs to the physical page: [ 31.301673] page:00000000def9ff28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168dd [ 31.302763] memcg:ffff88800f36cb01 [ 31.303184] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303867] page_type: 0xffffffff() [ 31.304319] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.305309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f36cb01 [ 31.306216] page dumped because: kasan: bad access detected [ 31.306892] [ 31.307106] Memory state around the buggy address: [ 31.307688] ffff8880168ddd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.308543] ffff8880168dde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.309450] >ffff8880168dde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.310309] ^ [ 31.311048] ffff8880168ddf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.311914] ffff8880168ddf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.312821] ================================================================== [ 31.314009] Disabling lock debugging due to kernel taint [ 32.804567] BUG: Bad rss-counter state mm:00000000b15e8bc5 type:MM_FILEPAGES val:33 [ 32.805780] BUG: Bad rss-counter state mm:00000000b15e8bc5 type:MM_ANONPAGES val:22 [ 33.217085] BUG: Bad rss-counter state mm:00000000634d263a type:MM_FILEPAGES val:33 [ 33.217876] BUG: Bad rss-counter state mm:00000000634d263a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4706' (ECDSA) to the list of known hosts. 2023/06/20 20:04:38 fuzzer started 2023/06/20 20:04:38 dialing manager at localhost:36067 2023/06/20 20:04:38 checking machine... 2023/06/20 20:04:38 checking revisions... [ 33.975380] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:04:38 testing simple program... [ 34.043784] cgroup: Unknown subsys name 'net' [ 34.103138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:04:38 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11001f99e85 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800fccf418 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000009cc000009cc R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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 00007f0dca2d4900 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=00007ffd46e2c000 CR3=000000000969a000 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=ffff888008c04400 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=00007f035596c650 CR3=000000000fe68000 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=2037333a34303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000