syzkaller login: [ 31.045498] BUG: Bad rss-counter state mm:00000000accb3e13 type:MM_FILEPAGES val:33 [ 31.046683] BUG: Bad rss-counter state mm:00000000accb3e13 type:MM_ANONPAGES val:22 [ 31.243808] ================================================================== [ 31.244933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.245849] Read of size 8 at addr ffff888018a853f8 by task sshd/222 [ 31.246779] [ 31.247016] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.247932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.248951] Call Trace: [ 31.249270] [ 31.249562] dump_stack_lvl+0x91/0xf0 [ 31.250060] print_report+0xcc/0x620 [ 31.250548] ? __virt_addr_valid+0x102/0x340 [ 31.251100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252370] kasan_report+0xbe/0xf0 [ 31.252857] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253480] vma_interval_tree_remove+0xc75/0xec0 [ 31.254083] vma_prepare+0xc54/0x11a0 [ 31.254610] __split_vma+0x5af/0x950 [ 31.255154] ? __pfx___split_vma+0x10/0x10 [ 31.255787] ? find_held_lock+0x2c/0x110 [ 31.256452] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.257143] ? lock_is_held_type+0x9f/0x120 [ 31.257790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258541] ? mtree_range_walk+0x632/0x900 [ 31.259211] ? mas_walk+0x5c7/0x7c0 [ 31.259781] do_vmi_munmap+0x1f1/0x2b0 [ 31.260384] mmap_region+0x1f9/0x2660 [ 31.260963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.262451] ? __pfx_lock_acquire+0x10/0x10 [ 31.263031] ? __pfx_mmap_region+0x10/0x10 [ 31.263594] ? security_mmap_addr+0x7d/0xa0 [ 31.264178] ? get_unmapped_area+0x1f5/0x3f0 [ 31.264702] do_mmap+0x854/0xf00 [ 31.265120] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.266116] ksys_mmap_pgoff+0x3af/0x500 [ 31.266594] do_syscall_64+0x3f/0x90 [ 31.267054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267670] RIP: 0033:0x7fc5a7dfcd82 [ 31.268101] 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 [ 31.270094] RSP: 002b:00007ffffab89588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5a7dfcd82 [ 31.271734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5a7236000 [ 31.272530] RBP: 00007fc5a7236000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273331] R10: 0000000000000812 R11: 0000000000000206 R12: 000056386a567ec0 [ 31.274300] R13: 00007ffffab895a0 R14: 00007ffffab895d0 R15: 00007ffffab89930 [ 31.275156] [ 31.275441] [ 31.275652] Allocated by task 213: [ 31.276076] kasan_save_stack+0x22/0x50 [ 31.276600] kasan_set_track+0x25/0x30 [ 31.277096] __kasan_slab_alloc+0x59/0x70 [ 31.277611] kmem_cache_alloc+0x16b/0x370 [ 31.278121] vm_area_dup+0x20/0x160 [ 31.278566] __split_vma+0x170/0x950 [ 31.279022] split_vma+0xc6/0x110 [ 31.279460] mprotect_fixup+0x8d2/0xb30 [ 31.279951] do_mprotect_pkey+0x87e/0xd40 [ 31.280474] __x64_sys_mprotect+0x78/0xc0 [ 31.280984] do_syscall_64+0x3f/0x90 [ 31.281445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282083] [ 31.282294] Freed by task 213: [ 31.282682] kasan_save_stack+0x22/0x50 [ 31.283176] kasan_set_track+0x25/0x30 [ 31.283667] kasan_save_free_info+0x2b/0x50 [ 31.284189] __kasan_slab_free+0x10a/0x190 [ 31.284721] kmem_cache_free+0x10d/0x4d0 [ 31.285232] rcu_core+0x8c8/0x2860 [ 31.285662] __do_softirq+0x1b7/0x7d4 [ 31.286143] [ 31.286358] Last potentially related work creation: [ 31.286926] kasan_save_stack+0x22/0x50 [ 31.287532] __kasan_record_aux_stack+0x8e/0xa0 [ 31.288112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288755] remove_vma+0x139/0x170 [ 31.289201] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289747] do_vmi_munmap+0x1f1/0x2b0 [ 31.290229] __vm_munmap+0x138/0x3a0 [ 31.290686] __x64_sys_munmap+0x59/0x80 [ 31.291178] do_syscall_64+0x3f/0x90 [ 31.291651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292329] [ 31.292539] The buggy address belongs to the object at ffff888018a853a0 [ 31.292539] which belongs to the cache vm_area_struct of size 168 [ 31.293987] The buggy address is located 88 bytes inside of [ 31.293987] freed 168-byte region [ffff888018a853a0, ffff888018a85448) [ 31.295364] [ 31.295578] The buggy address belongs to the physical page: [ 31.296248] page:00000000c3af8439 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a85 [ 31.297330] memcg:ffff8880168c6201 [ 31.297752] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298395] page_type: 0xffffffff() [ 31.298839] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.299759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168c6201 [ 31.300670] page dumped because: kasan: bad access detected [ 31.301325] [ 31.301537] Memory state around the buggy address: [ 31.302111] ffff888018a85280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.302962] ffff888018a85300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.303809] >ffff888018a85380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.304655] ^ [ 31.305492] ffff888018a85400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.306339] ffff888018a85480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.307186] ================================================================== [ 31.308179] Disabling lock debugging due to kernel taint [ 33.252812] BUG: Bad rss-counter state mm:00000000cef1ca06 type:MM_FILEPAGES val:33 [ 33.254034] BUG: Bad rss-counter state mm:00000000cef1ca06 type:MM_ANONPAGES val:22 [ 33.647968] BUG: Bad rss-counter state mm:0000000008679d9c type:MM_FILEPAGES val:33 [ 33.648686] BUG: Bad rss-counter state mm:0000000008679d9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15595' (ECDSA) to the list of known hosts. 2023/06/20 12:12:00 fuzzer started 2023/06/20 12:12:00 dialing manager at localhost:36067 2023/06/20 12:12:00 checking machine... 2023/06/20 12:12:00 checking revisions... [ 34.248507] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:12:00 testing simple program... [ 34.302644] cgroup: Unknown subsys name 'net' [ 34.346920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:12:00 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000f98 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff836627be RDI=0000000000000f98 RBP=ffff88800f21c140 RSP=ffff88801c9b73f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=563412feff005450 R12=0000000000000014 R13=ffff8880100a0f84 R14=0000000000001ec0 R15=0000000000000f3c RIP=ffffffff83662826 RFL=00000246 [---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 00007f25397cd900 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=00007f2539d84618 CR3=00000000163b6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007fc737c82bf0 CR3=000000000cb68000 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=f718b79b1f29fda81244c756221a1c63 XMM02=2c67c8bc2e329bc3000000000011a9d8 XMM03=fb795ef6d65770560000000000121e40 XMM04=e20c968e9740564c00000000000ae988 XMM05=19e9129bd510f2350000000000131c28 XMM06=8030ff6365449e510000000000130a90 XMM07=e042d86d42eb936e00000000001220c0 XMM08=a51cadb30cd370a3000000000011aa38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000