syzkaller login: [ 29.219014] BUG: Bad rss-counter state mm:000000005bbc816b type:MM_FILEPAGES val:33 [ 29.220329] BUG: Bad rss-counter state mm:000000005bbc816b type:MM_ANONPAGES val:22 [ 29.266097] ================================================================== [ 29.266992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.267933] Read of size 8 at addr ffff88800da74a50 by task sshd/220 [ 29.268737] [ 29.268953] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.269988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.270949] Call Trace: [ 29.271264] [ 29.271567] dump_stack_lvl+0x91/0xf0 [ 29.272062] print_report+0xcc/0x620 [ 29.272569] ? __virt_addr_valid+0x102/0x340 [ 29.273120] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.273737] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.274343] kasan_report+0xbe/0xf0 [ 29.274844] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.275482] vma_interval_tree_remove+0xc75/0xec0 [ 29.276110] vma_prepare+0xc54/0x11a0 [ 29.276615] __split_vma+0x5af/0x950 [ 29.277103] ? __pfx___split_vma+0x10/0x10 [ 29.277659] ? find_held_lock+0x2c/0x110 [ 29.278203] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.278803] ? lock_is_held_type+0x9f/0x120 [ 29.279355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.279973] ? mtree_range_walk+0x632/0x900 [ 29.280549] ? mas_walk+0x5c7/0x7c0 [ 29.281036] do_vmi_munmap+0x1f1/0x2b0 [ 29.281549] mmap_region+0x1f9/0x2660 [ 29.282056] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.282588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.283332] ? __pfx_lock_acquire+0x10/0x10 [ 29.283874] ? __pfx_mmap_region+0x10/0x10 [ 29.284438] ? security_mmap_addr+0x7d/0xa0 [ 29.284996] ? get_unmapped_area+0x1f5/0x3f0 [ 29.285559] do_mmap+0x854/0xf00 [ 29.286003] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.286504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.287086] ksys_mmap_pgoff+0x3af/0x500 [ 29.287621] do_syscall_64+0x3f/0x90 [ 29.288118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.288791] RIP: 0033:0x7fe74b6acd82 [ 29.289250] 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 [ 29.291491] RSP: 002b:00007ffc7ecd2098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.292468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe74b6acd82 [ 29.293345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe74aae6000 [ 29.294224] RBP: 00007fe74aae6000 R08: 0000000000000009 R09: 0000000000001000 [ 29.295089] R10: 0000000000000812 R11: 0000000000000206 R12: 000055906875fec0 [ 29.295970] R13: 00007ffc7ecd20b0 R14: 00007ffc7ecd20e0 R15: 00007ffc7ecd2440 [ 29.296868] [ 29.297170] [ 29.297394] Allocated by task 212: [ 29.297825] kasan_save_stack+0x22/0x50 [ 29.298337] kasan_set_track+0x25/0x30 [ 29.298836] __kasan_slab_alloc+0x59/0x70 [ 29.299370] kmem_cache_alloc+0x16b/0x370 [ 29.299889] vm_area_dup+0x20/0x160 [ 29.300362] __split_vma+0x170/0x950 [ 29.300835] split_vma+0xc6/0x110 [ 29.301276] mprotect_fixup+0x8d2/0xb30 [ 29.301818] do_mprotect_pkey+0x87e/0xd40 [ 29.302361] __x64_sys_mprotect+0x78/0xc0 [ 29.302884] do_syscall_64+0x3f/0x90 [ 29.303364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.304035] [ 29.304269] Freed by task 212: [ 29.304661] kasan_save_stack+0x22/0x50 [ 29.305173] kasan_set_track+0x25/0x30 [ 29.305677] kasan_save_free_info+0x2b/0x50 [ 29.306224] __kasan_slab_free+0x10a/0x190 [ 29.306759] kmem_cache_free+0x10d/0x4d0 [ 29.307336] rcu_core+0x8c8/0x2860 [ 29.307802] __do_softirq+0x1b7/0x7d4 [ 29.308379] [ 29.308595] Last potentially related work creation: [ 29.309200] kasan_save_stack+0x22/0x50 [ 29.309740] __kasan_record_aux_stack+0x8e/0xa0 [ 29.310328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.310977] remove_vma+0x139/0x170 [ 29.311426] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.311979] do_vmi_munmap+0x1f1/0x2b0 [ 29.312513] __vm_munmap+0x138/0x3a0 [ 29.312996] __x64_sys_munmap+0x59/0x80 [ 29.313518] do_syscall_64+0x3f/0x90 [ 29.313999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.314652] [ 29.314866] The buggy address belongs to the object at ffff88800da749f8 [ 29.314866] which belongs to the cache vm_area_struct of size 168 [ 29.316361] The buggy address is located 88 bytes inside of [ 29.316361] freed 168-byte region [ffff88800da749f8, ffff88800da74aa0) [ 29.317770] [ 29.317995] The buggy address belongs to the physical page: [ 29.318686] page:00000000a95744a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda74 [ 29.319802] memcg:ffff8880100abb01 [ 29.320261] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.320983] page_type: 0xffffffff() [ 29.321435] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a2c0 dead000000000005 [ 29.322362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100abb01 [ 29.323283] page dumped because: kasan: bad access detected [ 29.323949] [ 29.324176] Memory state around the buggy address: [ 29.324777] ffff88800da74900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.325650] ffff88800da74980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.326529] >ffff88800da74a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.327391] ^ [ 29.328096] ffff88800da74a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.328962] ffff88800da74b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.329826] ================================================================== [ 29.330861] Disabling lock debugging due to kernel taint [ 31.374431] BUG: Bad rss-counter state mm:000000003bfab883 type:MM_FILEPAGES val:33 [ 31.375584] BUG: Bad rss-counter state mm:000000003bfab883 type:MM_ANONPAGES val:22 [ 31.684318] BUG: Bad rss-counter state mm:000000002826363a type:MM_FILEPAGES val:33 [ 31.685588] BUG: Bad rss-counter state mm:000000002826363a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50592' (ECDSA) to the list of known hosts. 2023/06/21 03:43:03 fuzzer started 2023/06/21 03:43:03 dialing manager at localhost:36067 2023/06/21 03:43:03 checking machine... 2023/06/21 03:43:03 checking revisions... [ 32.392807] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:43:03 testing simple program... [ 32.437103] cgroup: Unknown subsys name 'net' [ 32.489223] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:43:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff844c6cea RCX=0000000000000001 RDX=1ffff11002c46dfe RSI=ffff888016237a80 RDI=ffffffff844c6cea RBP=ffffffff844c6cea RSP=ffff888016236f40 R8 =0000000000000001 R9 =ffff888016236fd8 R10=0000000000038001 R11=00000000000b3f57 R12=ffff888016237060 R13=0000000000000000 R14=ffff8880161cb680 R15=0000000000092800 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007fd7c5bdc900 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=00007fd7c5bbb020 CR3=000000000f38e000 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=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 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=00007f3f739dab50 CR3=000000000c70e000 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=5df708662d93f9a84b4c94de05889a9c XMM02=2c67c8bc2e329bc3000000000011a0f8 XMM03=fb795ef6d65770560000000000121218 XMM04=1f4ff438456fc32200000000000ae988 XMM05=19e9129bd510f2350000000000131748 XMM06=6a89833bb4bd4b0200000000001305b0 XMM07=e042d86d42eb936e00000000001214f0 XMM08=522e7df1ef2118c5000000000011a158 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000