syzkaller login: [ 31.094459] BUG: Bad rss-counter state mm:00000000009180da type:MM_FILEPAGES val:33 [ 31.095724] BUG: Bad rss-counter state mm:00000000009180da type:MM_ANONPAGES val:22 [ 31.255374] ================================================================== [ 31.256305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.257242] Read of size 8 at addr ffff88801a0f43f8 by task sshd/219 [ 31.258142] [ 31.258363] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.259279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260305] Call Trace: [ 31.260632] [ 31.260914] dump_stack_lvl+0x91/0xf0 [ 31.261413] print_report+0xcc/0x620 [ 31.261945] ? __virt_addr_valid+0x102/0x340 [ 31.262530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263157] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263784] kasan_report+0xbe/0xf0 [ 31.264274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264894] vma_interval_tree_remove+0xc75/0xec0 [ 31.265501] vma_prepare+0xc54/0x11a0 [ 31.266022] __split_vma+0x5af/0x950 [ 31.266512] ? __pfx___split_vma+0x10/0x10 [ 31.267042] ? find_held_lock+0x2c/0x110 [ 31.267561] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.268123] ? lock_is_held_type+0x9f/0x120 [ 31.268658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.269269] ? mtree_range_walk+0x632/0x900 [ 31.269854] ? mas_walk+0x5c7/0x7c0 [ 31.270329] do_vmi_munmap+0x1f1/0x2b0 [ 31.270849] mmap_region+0x1f9/0x2660 [ 31.271329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.271850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.272567] ? __pfx_lock_acquire+0x10/0x10 [ 31.273109] ? __pfx_mmap_region+0x10/0x10 [ 31.273659] ? security_mmap_addr+0x7d/0xa0 [ 31.274204] ? get_unmapped_area+0x1f5/0x3f0 [ 31.274775] do_mmap+0x854/0xf00 [ 31.275212] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.275700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.276261] ksys_mmap_pgoff+0x3af/0x500 [ 31.276770] do_syscall_64+0x3f/0x90 [ 31.277251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277931] RIP: 0033:0x7f93f7493d82 [ 31.278420] 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 [ 31.280571] RSP: 002b:00007ffd0baafa38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.281481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93f7493d82 [ 31.282363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93f68cd000 [ 31.283235] RBP: 00007f93f68cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.284097] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563a0f22ec0 [ 31.284946] R13: 00007ffd0baafa50 R14: 00007ffd0baafa80 R15: 00007ffd0baafde0 [ 31.285845] [ 31.286142] [ 31.286357] Allocated by task 212: [ 31.286816] kasan_save_stack+0x22/0x50 [ 31.287319] kasan_set_track+0x25/0x30 [ 31.287816] __kasan_slab_alloc+0x59/0x70 [ 31.288342] kmem_cache_alloc+0x16b/0x370 [ 31.288860] vm_area_dup+0x20/0x160 [ 31.289321] __split_vma+0x170/0x950 [ 31.289828] split_vma+0xc6/0x110 [ 31.290267] mprotect_fixup+0x8d2/0xb30 [ 31.290777] do_mprotect_pkey+0x87e/0xd40 [ 31.291301] __x64_sys_mprotect+0x78/0xc0 [ 31.291826] do_syscall_64+0x3f/0x90 [ 31.292297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292948] [ 31.293165] Freed by task 212: [ 31.293557] kasan_save_stack+0x22/0x50 [ 31.294098] kasan_set_track+0x25/0x30 [ 31.294601] kasan_save_free_info+0x2b/0x50 [ 31.295134] __kasan_slab_free+0x10a/0x190 [ 31.295667] kmem_cache_free+0x10d/0x4d0 [ 31.296172] rcu_core+0x8c8/0x2860 [ 31.296618] __do_softirq+0x1b7/0x7d4 [ 31.297094] [ 31.297307] Last potentially related work creation: [ 31.297935] kasan_save_stack+0x22/0x50 [ 31.298463] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.299674] remove_vma+0x139/0x170 [ 31.300125] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.300683] do_vmi_munmap+0x1f1/0x2b0 [ 31.301175] __vm_munmap+0x138/0x3a0 [ 31.301669] __x64_sys_munmap+0x59/0x80 [ 31.302183] do_syscall_64+0x3f/0x90 [ 31.302670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303314] [ 31.303528] The buggy address belongs to the object at ffff88801a0f43a0 [ 31.303528] which belongs to the cache vm_area_struct of size 168 [ 31.305007] The buggy address is located 88 bytes inside of [ 31.305007] freed 168-byte region [ffff88801a0f43a0, ffff88801a0f4448) [ 31.306476] [ 31.306697] The buggy address belongs to the physical page: [ 31.307363] page:00000000a9676261 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0f4 [ 31.308462] memcg:ffff888016934301 [ 31.308893] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.309553] page_type: 0xffffffff() [ 31.310040] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.310970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016934301 [ 31.311877] page dumped because: kasan: bad access detected [ 31.312543] [ 31.312758] Memory state around the buggy address: [ 31.313352] ffff88801a0f4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.314253] ffff88801a0f4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.315136] >ffff88801a0f4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.315985] ^ [ 31.316827] ffff88801a0f4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.317713] ffff88801a0f4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318579] ================================================================== [ 31.319554] Disabling lock debugging due to kernel taint [ 33.123537] BUG: Bad rss-counter state mm:00000000b55acdc8 type:MM_FILEPAGES val:33 [ 33.124214] BUG: Bad rss-counter state mm:00000000b55acdc8 type:MM_ANONPAGES val:22 [ 33.581347] BUG: Bad rss-counter state mm:00000000eacc2f5f type:MM_FILEPAGES val:33 [ 33.582429] BUG: Bad rss-counter state mm:00000000eacc2f5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17125' (ECDSA) to the list of known hosts. 2023/06/20 12:07:37 fuzzer started 2023/06/20 12:07:38 dialing manager at localhost:36067 2023/06/20 12:07:38 checking machine... 2023/06/20 12:07:38 checking revisions... [ 34.317208] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:07:38 testing simple program... [ 34.368832] cgroup: Unknown subsys name 'net' [ 34.428637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:07:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa7d7aa5f40 CR3=000000000e73e000 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=2037333a37303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37303a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806cf09d38 R8 =00000000c1f3f81e R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea000036de00 R14=ffffffff8364b6f8 R15=ffff88800db7a6c0 RIP=ffffffff8180f032 RFL=00000002 [-------] 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 00007f9f26070900 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=00007fffa67f8000 CR3=000000000c9e2000 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