syzkaller login: [ 29.152954] BUG: Bad rss-counter state mm:0000000053b98f74 type:MM_FILEPAGES val:33 [ 29.154332] BUG: Bad rss-counter state mm:0000000053b98f74 type:MM_ANONPAGES val:22 [ 29.196854] ================================================================== [ 29.197452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.198142] Read of size 8 at addr ffff88800f106228 by task sshd/221 [ 29.198782] [ 29.198926] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.199499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.200219] Call Trace: [ 29.200431] [ 29.200617] dump_stack_lvl+0x91/0xf0 [ 29.200942] print_report+0xcc/0x620 [ 29.201258] ? __virt_addr_valid+0x102/0x340 [ 29.201622] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.202028] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.202483] kasan_report+0xbe/0xf0 [ 29.202787] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.203179] vma_interval_tree_remove+0xc75/0xec0 [ 29.203568] vma_prepare+0xc54/0x11a0 [ 29.203877] __split_vma+0x5af/0x950 [ 29.204180] ? __pfx___split_vma+0x10/0x10 [ 29.204523] ? find_held_lock+0x2c/0x110 [ 29.204865] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.205228] ? lock_is_held_type+0x9f/0x120 [ 29.205654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.206075] ? mtree_range_walk+0x632/0x900 [ 29.206471] ? mas_walk+0x5c7/0x7c0 [ 29.206791] do_vmi_munmap+0x1f1/0x2b0 [ 29.207118] mmap_region+0x1f9/0x2660 [ 29.207423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.207755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.208203] ? __pfx_lock_acquire+0x10/0x10 [ 29.208559] ? __pfx_mmap_region+0x10/0x10 [ 29.208962] ? security_mmap_addr+0x7d/0xa0 [ 29.209313] ? get_unmapped_area+0x1f5/0x3f0 [ 29.209670] do_mmap+0x854/0xf00 [ 29.209949] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.210322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.210692] ksys_mmap_pgoff+0x3af/0x500 [ 29.211034] do_syscall_64+0x3f/0x90 [ 29.211372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.211795] RIP: 0033:0x7f57e8c83d82 [ 29.212091] 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 [ 29.213462] RSP: 002b:00007ffcbe9c0448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.214102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57e8c83d82 [ 29.214696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57e80bd000 [ 29.215243] RBP: 00007f57e80bd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.215802] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559228bc5ec0 [ 29.216360] R13: 00007ffcbe9c0460 R14: 00007ffcbe9c0490 R15: 00007ffcbe9c07f0 [ 29.216957] [ 29.217142] [ 29.217282] Allocated by task 214: [ 29.217565] kasan_save_stack+0x22/0x50 [ 29.217885] kasan_set_track+0x25/0x30 [ 29.218222] __kasan_slab_alloc+0x59/0x70 [ 29.218551] kmem_cache_alloc+0x16b/0x370 [ 29.218876] vm_area_dup+0x20/0x160 [ 29.219149] __split_vma+0x170/0x950 [ 29.219428] split_vma+0xc6/0x110 [ 29.219690] mprotect_fixup+0x8d2/0xb30 [ 29.219999] do_mprotect_pkey+0x87e/0xd40 [ 29.220345] __x64_sys_mprotect+0x78/0xc0 [ 29.220693] do_syscall_64+0x3f/0x90 [ 29.221005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.221416] [ 29.221557] Freed by task 204: [ 29.221805] kasan_save_stack+0x22/0x50 [ 29.222175] kasan_set_track+0x25/0x30 [ 29.222487] kasan_save_free_info+0x2b/0x50 [ 29.222824] __kasan_slab_free+0x10a/0x190 [ 29.223164] kmem_cache_free+0x10d/0x4d0 [ 29.223485] rcu_core+0x8c8/0x2860 [ 29.223771] __do_softirq+0x1b7/0x7d4 [ 29.224074] [ 29.224211] Last potentially related work creation: [ 29.224571] kasan_save_stack+0x22/0x50 [ 29.224879] __kasan_record_aux_stack+0x8e/0xa0 [ 29.225226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.225613] remove_vma+0x139/0x170 [ 29.225885] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.226439] do_vmi_munmap+0x1f1/0x2b0 [ 29.226739] __vm_munmap+0x138/0x3a0 [ 29.227020] __x64_sys_munmap+0x59/0x80 [ 29.227325] do_syscall_64+0x3f/0x90 [ 29.227644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.228076] [ 29.228220] The buggy address belongs to the object at ffff88800f1061d0 [ 29.228220] which belongs to the cache vm_area_struct of size 168 [ 29.229183] The buggy address is located 88 bytes inside of [ 29.229183] freed 168-byte region [ffff88800f1061d0, ffff88800f106278) [ 29.230061] [ 29.230245] The buggy address belongs to the physical page: [ 29.230666] page:0000000041d767c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf106 [ 29.231354] memcg:ffff88800fb08701 [ 29.231624] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.232027] page_type: 0xffffffff() [ 29.232310] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.232881] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb08701 [ 29.233444] page dumped because: kasan: bad access detected [ 29.233834] [ 29.233964] Memory state around the buggy address: [ 29.234354] ffff88800f106100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.234884] ffff88800f106180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.235438] >ffff88800f106200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.235994] ^ [ 29.236397] ffff88800f106280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.236975] ffff88800f106300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.237542] ================================================================== [ 29.238525] Disabling lock debugging due to kernel taint [ 31.091057] BUG: Bad rss-counter state mm:000000008793abb9 type:MM_FILEPAGES val:33 [ 31.091826] BUG: Bad rss-counter state mm:000000008793abb9 type:MM_ANONPAGES val:22 [ 31.397624] BUG: Bad rss-counter state mm:00000000cc460ed0 type:MM_FILEPAGES val:33 [ 31.398396] BUG: Bad rss-counter state mm:00000000cc460ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63718' (ECDSA) to the list of known hosts. 2023/06/21 08:30:49 fuzzer started 2023/06/21 08:30:49 dialing manager at localhost:36067 2023/06/21 08:30:49 checking machine... 2023/06/21 08:30:49 checking revisions... [ 31.965140] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:30:49 testing simple program... [ 32.014908] cgroup: Unknown subsys name 'net' [ 32.050384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:49 Registers: info registers vcpu 0 RAX=1ffff11001624285 RBX=ffff88800b1213f8 RCX=1ffff11001600aac RDX=dffffc0000000000 RSI=ffff88800b3c0790 RDI=ffff88800b121428 RBP=ffff88800b21c668 RSP=ffff88800d6d79c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800b3c0780 R13=0000000000000000 R14=ffff88800f84c638 R15=ffff88800f84c5f0 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 00007f44bb513900 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=00007ffd5aed6000 CR3=00000000100e4000 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=2039343a30333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a30333a3830203132 XMM08=3d656e696c646d632022656369767265 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=00007fd8c731b040 CR3=000000000f5d8000 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=fcef701872bd1ea2004f268bbfc0238c XMM02=ec2efd57dc4c00df000000000011b988 XMM03=057f04af0734ca21000000000011ba58 XMM04=02646121271cfbe800000000000ae988 XMM05=e4cb8bb95a7664b60000000000131dc0 XMM06=c291bd5c70af25b90000000000131c48 XMM07=e042d86d42eb936e00000000001221a8 XMM08=057f04af0734ca21000000000011ba58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000