syzkaller login: [ 31.413314] BUG: Bad rss-counter state mm:00000000e354bd82 type:MM_FILEPAGES val:33 [ 31.414323] BUG: Bad rss-counter state mm:00000000e354bd82 type:MM_ANONPAGES val:22 [ 31.582289] ================================================================== [ 31.583133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.584078] Read of size 8 at addr ffff88800cad7798 by task sshd/221 [ 31.584892] [ 31.585094] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.585900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.586844] Call Trace: [ 31.587148] [ 31.587414] dump_stack_lvl+0x91/0xf0 [ 31.587863] print_report+0xcc/0x620 [ 31.588314] ? __virt_addr_valid+0x102/0x340 [ 31.588841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589977] kasan_report+0xbe/0xf0 [ 31.590452] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591022] vma_interval_tree_remove+0xc75/0xec0 [ 31.591584] vma_prepare+0xc54/0x11a0 [ 31.592035] __split_vma+0x5af/0x950 [ 31.592476] ? __pfx___split_vma+0x10/0x10 [ 31.592988] ? find_held_lock+0x2c/0x110 [ 31.593494] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.594072] ? lock_is_held_type+0x9f/0x120 [ 31.594598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.595152] ? mtree_range_walk+0x632/0x900 [ 31.595660] ? mas_walk+0x5c7/0x7c0 [ 31.596099] do_vmi_munmap+0x1f1/0x2b0 [ 31.596625] mmap_region+0x1f9/0x2660 [ 31.597069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.597543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.598210] ? __pfx_lock_acquire+0x10/0x10 [ 31.598729] ? __pfx_mmap_region+0x10/0x10 [ 31.599214] ? security_mmap_addr+0x7d/0xa0 [ 31.599726] ? get_unmapped_area+0x1f5/0x3f0 [ 31.600241] do_mmap+0x854/0xf00 [ 31.600636] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.601098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.601617] ksys_mmap_pgoff+0x3af/0x500 [ 31.602077] do_syscall_64+0x3f/0x90 [ 31.602545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603156] RIP: 0033:0x7f14abe6ad82 [ 31.603583] 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 [ 31.605615] RSP: 002b:00007ffdec20ab28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.606474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14abe6ad82 [ 31.607260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14ab2a4000 [ 31.608065] RBP: 00007f14ab2a4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.608857] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3aac5eb20 [ 31.609661] R13: 00007ffdec20ab40 R14: 00007ffdec20ab70 R15: 00007ffdec20aed0 [ 31.610448] [ 31.610744] [ 31.610939] Allocated by task 214: [ 31.611352] kasan_save_stack+0x22/0x50 [ 31.611830] kasan_set_track+0x25/0x30 [ 31.612283] __kasan_slab_alloc+0x59/0x70 [ 31.612755] kmem_cache_alloc+0x16b/0x370 [ 31.613235] vm_area_dup+0x20/0x160 [ 31.613648] __split_vma+0x170/0x950 [ 31.614067] split_vma+0xc6/0x110 [ 31.614471] mprotect_fixup+0x8d2/0xb30 [ 31.614926] do_mprotect_pkey+0x87e/0xd40 [ 31.615417] __x64_sys_mprotect+0x78/0xc0 [ 31.615885] do_syscall_64+0x3f/0x90 [ 31.616317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616903] [ 31.617096] Freed by task 214: [ 31.617457] kasan_save_stack+0x22/0x50 [ 31.617919] kasan_set_track+0x25/0x30 [ 31.618399] kasan_save_free_info+0x2b/0x50 [ 31.618928] __kasan_slab_free+0x10a/0x190 [ 31.619454] kmem_cache_free+0x10d/0x4d0 [ 31.619909] rcu_core+0x8c8/0x2860 [ 31.620321] __do_softirq+0x1b7/0x7d4 [ 31.620763] [ 31.620961] Last potentially related work creation: [ 31.621496] kasan_save_stack+0x22/0x50 [ 31.621973] __kasan_record_aux_stack+0x8e/0xa0 [ 31.622615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.623225] remove_vma+0x139/0x170 [ 31.623653] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.624164] do_vmi_munmap+0x1f1/0x2b0 [ 31.624610] __vm_munmap+0x138/0x3a0 [ 31.625040] __x64_sys_munmap+0x59/0x80 [ 31.625495] do_syscall_64+0x3f/0x90 [ 31.625931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.626541] [ 31.626744] Second to last potentially related work creation: [ 31.627363] kasan_save_stack+0x22/0x50 [ 31.627824] __kasan_record_aux_stack+0x8e/0xa0 [ 31.628349] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.628937] remove_vma+0x139/0x170 [ 31.629345] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.629849] do_vmi_munmap+0x1f1/0x2b0 [ 31.630367] mmap_region+0x1f9/0x2660 [ 31.631047] do_mmap+0x854/0xf00 [ 31.631632] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.632295] ksys_mmap_pgoff+0x3af/0x500 [ 31.632977] do_syscall_64+0x3f/0x90 [ 31.633621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.634540] [ 31.634837] The buggy address belongs to the object at ffff88800cad7740 [ 31.634837] which belongs to the cache vm_area_struct of size 168 [ 31.636561] The buggy address is located 88 bytes inside of [ 31.636561] freed 168-byte region [ffff88800cad7740, ffff88800cad77e8) [ 31.638118] [ 31.638365] The buggy address belongs to the physical page: [ 31.639109] page:000000002a715403 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcad7 [ 31.640289] memcg:ffff88800ff0ce01 [ 31.640719] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.641411] page_type: 0xffffffff() [ 31.641863] raw: 0100000000000200 ffff8880087a0c80 ffffea0000328040 dead000000000003 [ 31.642789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff0ce01 [ 31.643690] page dumped because: kasan: bad access detected [ 31.644339] [ 31.644553] Memory state around the buggy address: [ 31.645133] ffff88800cad7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.645978] ffff88800cad7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.646845] >ffff88800cad7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.647681] ^ [ 31.648172] ffff88800cad7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.649024] ffff88800cad7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.649869] ================================================================== [ 31.650868] Disabling lock debugging due to kernel taint [ 33.569254] BUG: Bad rss-counter state mm:00000000be7175c3 type:MM_FILEPAGES val:33 [ 33.570078] BUG: Bad rss-counter state mm:00000000be7175c3 type:MM_ANONPAGES val:22 [ 34.046710] BUG: Bad rss-counter state mm:0000000009fad71e type:MM_FILEPAGES val:33 [ 34.047804] BUG: Bad rss-counter state mm:0000000009fad71e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33853' (ECDSA) to the list of known hosts. 2023/06/21 00:25:08 fuzzer started 2023/06/21 00:25:08 dialing manager at localhost:36067 2023/06/21 00:25:08 checking machine... 2023/06/21 00:25:08 checking revisions... [ 34.816558] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:25:08 testing simple program... [ 34.866280] cgroup: Unknown subsys name 'net' [ 34.909250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:25:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014707288 RCX=0000000000000001 RDX=1ffff110028e0e52 RSI=ffff888014707f38 RDI=ffff888014707290 RBP=ffff888014707f38 RSP=ffff8880147071e0 R8 =ffffffff863b4254 R9 =ffff8880147072c8 R10=0000000000038001 R11=000000000008ab8c R12=0000000000000008 R13=ffff8880147072d0 R14=ffff888014707f40 R15=ffff888014707288 RIP=ffffffff81130445 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 00007fb517d66900 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=00007fb5171ca8e0 CR3=000000000d0e4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=74961feb452af5d700000000000ae988 XMM05=3a4df9b2ab59776e0000000000134ac0 XMM06=c291bd5c70af25b90000000000133b60 XMM07=fb795ef6d65770560000000000122ab8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009a7b6e8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880166f74f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000093900000939 R12=0000000000000000 R13=00000000000000dd R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff84511dd4 RFL=00000202 [-------] 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 00007fd6d5b05900 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=00007fd6d60bc618 CR3=00000000096f0000 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=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