syzkaller login: [ 30.175661] BUG: Bad rss-counter state mm:000000000eb37c1b type:MM_FILEPAGES val:33 [ 30.176869] BUG: Bad rss-counter state mm:000000000eb37c1b type:MM_ANONPAGES val:22 [ 30.215785] ================================================================== [ 30.216702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.217860] Read of size 8 at addr ffff88800da8db38 by task sshd/219 [ 30.218800] [ 30.219023] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.219915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.220931] Call Trace: [ 30.221257] [ 30.221552] dump_stack_lvl+0x91/0xf0 [ 30.222050] print_report+0xcc/0x620 [ 30.222564] ? __virt_addr_valid+0x102/0x340 [ 30.223132] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.224397] kasan_report+0xbe/0xf0 [ 30.224879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.225529] vma_interval_tree_remove+0xc75/0xec0 [ 30.226171] vma_prepare+0xc54/0x11a0 [ 30.226689] __split_vma+0x5af/0x950 [ 30.227397] ? __pfx___split_vma+0x10/0x10 [ 30.227944] ? find_held_lock+0x2c/0x110 [ 30.228497] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.229081] ? lock_is_held_type+0x9f/0x120 [ 30.229659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.230296] ? mtree_range_walk+0x632/0x900 [ 30.230874] ? mas_walk+0x5c7/0x7c0 [ 30.231375] do_vmi_munmap+0x1f1/0x2b0 [ 30.231890] mmap_region+0x1f9/0x2660 [ 30.232377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.232891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.233642] ? __pfx_lock_acquire+0x10/0x10 [ 30.234198] ? __pfx_mmap_region+0x10/0x10 [ 30.234770] ? security_mmap_addr+0x7d/0xa0 [ 30.235352] ? get_unmapped_area+0x1f5/0x3f0 [ 30.235936] do_mmap+0x854/0xf00 [ 30.236406] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.236934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.237535] ksys_mmap_pgoff+0x3af/0x500 [ 30.238082] do_syscall_64+0x3f/0x90 [ 30.238600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.239281] RIP: 0033:0x7f092f220d82 [ 30.239734] 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 [ 30.241864] RSP: 002b:00007fff020f60d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.242796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f092f220d82 [ 30.243652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f092e65a000 [ 30.244497] RBP: 00007f092e65a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.245344] R10: 0000000000000812 R11: 0000000000000206 R12: 000056461655bec0 [ 30.246177] R13: 00007fff020f60f0 R14: 00007fff020f6120 R15: 00007fff020f6480 [ 30.247046] [ 30.247334] [ 30.247546] Allocated by task 212: [ 30.247976] kasan_save_stack+0x22/0x50 [ 30.248484] kasan_set_track+0x25/0x30 [ 30.248976] __kasan_slab_alloc+0x59/0x70 [ 30.249501] kmem_cache_alloc+0x16b/0x370 [ 30.250015] vm_area_dup+0x20/0x160 [ 30.250479] __split_vma+0x170/0x950 [ 30.250939] split_vma+0xc6/0x110 [ 30.251378] mprotect_fixup+0x8d2/0xb30 [ 30.251877] do_mprotect_pkey+0x87e/0xd40 [ 30.252404] __x64_sys_mprotect+0x78/0xc0 [ 30.252921] do_syscall_64+0x3f/0x90 [ 30.253399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254036] [ 30.254274] Freed by task 212: [ 30.254671] kasan_save_stack+0x22/0x50 [ 30.255190] kasan_set_track+0x25/0x30 [ 30.255685] kasan_save_free_info+0x2b/0x50 [ 30.256216] __kasan_slab_free+0x10a/0x190 [ 30.256746] kmem_cache_free+0x10d/0x4d0 [ 30.257256] rcu_core+0x8c8/0x2860 [ 30.257698] __do_softirq+0x1b7/0x7d4 [ 30.258183] [ 30.258417] Last potentially related work creation: [ 30.258993] kasan_save_stack+0x22/0x50 [ 30.259500] __kasan_record_aux_stack+0x8e/0xa0 [ 30.260080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.260734] remove_vma+0x139/0x170 [ 30.261195] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.261754] do_vmi_munmap+0x1f1/0x2b0 [ 30.262244] __vm_munmap+0x138/0x3a0 [ 30.262729] __x64_sys_munmap+0x59/0x80 [ 30.263235] do_syscall_64+0x3f/0x90 [ 30.263709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.264361] [ 30.264580] The buggy address belongs to the object at ffff88800da8dae0 [ 30.264580] which belongs to the cache vm_area_struct of size 168 [ 30.266044] The buggy address is located 88 bytes inside of [ 30.266044] freed 168-byte region [ffff88800da8dae0, ffff88800da8db88) [ 30.267457] [ 30.267670] The buggy address belongs to the physical page: [ 30.268335] page:000000005f01e52d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda8d [ 30.269502] memcg:ffff888010134a01 [ 30.269929] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.270593] page_type: 0xffffffff() [ 30.271043] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.271962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010134a01 [ 30.272871] page dumped because: kasan: bad access detected [ 30.273532] [ 30.273750] Memory state around the buggy address: [ 30.274340] ffff88800da8da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.275189] ffff88800da8da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.276039] >ffff88800da8db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.276875] ^ [ 30.277489] ffff88800da8db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.278354] ffff88800da8dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.279204] ================================================================== [ 30.280229] Disabling lock debugging due to kernel taint [ 32.870805] BUG: Bad rss-counter state mm:000000007e1348cc type:MM_FILEPAGES val:33 [ 32.871959] BUG: Bad rss-counter state mm:000000007e1348cc type:MM_ANONPAGES val:22 [ 33.231046] BUG: Bad rss-counter state mm:0000000069510f21 type:MM_FILEPAGES val:33 [ 33.232008] BUG: Bad rss-counter state mm:0000000069510f21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14957' (ECDSA) to the list of known hosts. 2023/06/20 16:52:22 fuzzer started 2023/06/20 16:52:22 dialing manager at localhost:36067 2023/06/20 16:52:22 checking machine... 2023/06/20 16:52:22 checking revisions... [ 33.952566] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:52:23 testing simple program... [ 34.000349] cgroup: Unknown subsys name 'net' [ 34.054634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:22 Registers: info registers vcpu 0 RAX=ffff8880136b0270 RBX=ffff8880136b1528 RCX=1ffff110026d62ac RDX=dffffc0000000000 RSI=ffff88801a113368 RDI=ffff8880136b1560 RBP=ffff8880136b1538 RSP=ffff8880145476b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801a113280 R13=0000000000000000 R14=ffff888015dfd508 R15=ffff888015dfd4c0 RIP=ffffffff818476ad RFL=00000087 [--S--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 00007fa8e066c900 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=00007fffc1259000 CR3=000000001cec0000 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=00007f35fddc3000 CR3=0000000014502000 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=90ce90b5e5be1c908041d21db411f715 XMM02=000000000011aed8eff9b2d0a8fce9cb XMM03=000000000011afa82c67c8bc2e329bc3 XMM04=198c5a335e675e7800000000000ae988 XMM05=dfcdbad4f1609c370000000000131b28 XMM06=806171799158d96700000000001319b0 XMM07=e042d86d42eb936e0000000000121ed0 XMM08=2bfc5ad171f6b50a000000000011afa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000