syzkaller login: [ 30.434765] BUG: Bad rss-counter state mm:00000000c87172a0 type:MM_FILEPAGES val:33 [ 30.435419] BUG: Bad rss-counter state mm:00000000c87172a0 type:MM_ANONPAGES val:22 [ 30.555643] ================================================================== [ 30.556338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.557042] Read of size 8 at addr ffff88801807f968 by task sshd/222 [ 30.557612] [ 30.557762] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.558418] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.559076] Call Trace: [ 30.559297] [ 30.559661] dump_stack_lvl+0x91/0xf0 [ 30.560038] print_report+0xcc/0x620 [ 30.560372] ? __virt_addr_valid+0x102/0x340 [ 30.560761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561748] kasan_report+0xbe/0xf0 [ 30.562088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.562527] vma_interval_tree_remove+0xc75/0xec0 [ 30.562987] vma_prepare+0xc54/0x11a0 [ 30.563319] __split_vma+0x5af/0x950 [ 30.563657] ? __pfx___split_vma+0x10/0x10 [ 30.564065] ? find_held_lock+0x2c/0x110 [ 30.564442] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.564828] ? lock_is_held_type+0x9f/0x120 [ 30.565232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.565704] ? mtree_range_walk+0x632/0x900 [ 30.566100] ? mas_walk+0x5c7/0x7c0 [ 30.566435] do_vmi_munmap+0x1f1/0x2b0 [ 30.566785] mmap_region+0x1f9/0x2660 [ 30.567127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.567488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.567990] ? __pfx_lock_acquire+0x10/0x10 [ 30.568365] ? __pfx_mmap_region+0x10/0x10 [ 30.568736] ? security_mmap_addr+0x7d/0xa0 [ 30.569138] ? get_unmapped_area+0x1f5/0x3f0 [ 30.569528] do_mmap+0x854/0xf00 [ 30.569901] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.570256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.570648] ksys_mmap_pgoff+0x3af/0x500 [ 30.571010] do_syscall_64+0x3f/0x90 [ 30.571339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.571803] RIP: 0033:0x7f9bcec22d82 [ 30.572151] 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 [ 30.573654] RSP: 002b:00007ffe6ae56f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.574284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9bcec22d82 [ 30.574883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9bce05c000 [ 30.575458] RBP: 00007f9bce05c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.576075] R10: 0000000000000812 R11: 0000000000000206 R12: 000055921a73cec0 [ 30.576681] R13: 00007ffe6ae56fb0 R14: 00007ffe6ae56fe0 R15: 00007ffe6ae57340 [ 30.577286] [ 30.577490] [ 30.577708] Allocated by task 215: [ 30.578041] kasan_save_stack+0x22/0x50 [ 30.578404] kasan_set_track+0x25/0x30 [ 30.578742] __kasan_slab_alloc+0x59/0x70 [ 30.579156] kmem_cache_alloc+0x16b/0x370 [ 30.579521] vm_area_dup+0x20/0x160 [ 30.579843] __split_vma+0x170/0x950 [ 30.580173] split_vma+0xc6/0x110 [ 30.580484] mprotect_fixup+0x8d2/0xb30 [ 30.580833] do_mprotect_pkey+0x87e/0xd40 [ 30.581243] __x64_sys_mprotect+0x78/0xc0 [ 30.581633] do_syscall_64+0x3f/0x90 [ 30.582004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.582482] [ 30.582642] Freed by task 215: [ 30.582899] kasan_save_stack+0x22/0x50 [ 30.583262] kasan_set_track+0x25/0x30 [ 30.583617] kasan_save_free_info+0x2b/0x50 [ 30.583991] __kasan_slab_free+0x10a/0x190 [ 30.584395] kmem_cache_free+0x10d/0x4d0 [ 30.584774] rcu_core+0x8c8/0x2860 [ 30.585090] __do_softirq+0x1b7/0x7d4 [ 30.585433] [ 30.585625] Last potentially related work creation: [ 30.586077] kasan_save_stack+0x22/0x50 [ 30.586439] __kasan_record_aux_stack+0x8e/0xa0 [ 30.586852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.587349] remove_vma+0x139/0x170 [ 30.587667] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.588061] do_vmi_munmap+0x1f1/0x2b0 [ 30.588414] __vm_munmap+0x138/0x3a0 [ 30.588735] __x64_sys_munmap+0x59/0x80 [ 30.589124] do_syscall_64+0x3f/0x90 [ 30.589456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.589947] [ 30.590104] The buggy address belongs to the object at ffff88801807f910 [ 30.590104] which belongs to the cache vm_area_struct of size 168 [ 30.591132] The buggy address is located 88 bytes inside of [ 30.591132] freed 168-byte region [ffff88801807f910, ffff88801807f9b8) [ 30.592100] [ 30.592239] The buggy address belongs to the physical page: [ 30.592673] page:00000000ecc90ba0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1807f [ 30.593419] memcg:ffff888015bb4001 [ 30.593727] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.594191] page_type: 0xffffffff() [ 30.594486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.595091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bb4001 [ 30.595687] page dumped because: kasan: bad access detected [ 30.596166] [ 30.596317] Memory state around the buggy address: [ 30.596707] ffff88801807f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.597293] ffff88801807f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.597906] >ffff88801807f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.598473] ^ [ 30.599012] ffff88801807f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.599578] ffff88801807fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.600160] ================================================================== [ 30.600862] Disabling lock debugging due to kernel taint [ 32.489229] BUG: Bad rss-counter state mm:000000007c66514b type:MM_FILEPAGES val:33 [ 32.490115] BUG: Bad rss-counter state mm:000000007c66514b type:MM_ANONPAGES val:22 [ 32.872582] BUG: Bad rss-counter state mm:000000000dcddce5 type:MM_FILEPAGES val:33 [ 32.873381] BUG: Bad rss-counter state mm:000000000dcddce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29093' (ECDSA) to the list of known hosts. 2023/06/21 09:53:42 fuzzer started 2023/06/21 09:53:42 dialing manager at localhost:36067 2023/06/21 09:53:42 checking machine... 2023/06/21 09:53:42 checking revisions... [ 33.451188] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:53:43 testing simple program... [ 33.487928] cgroup: Unknown subsys name 'net' [ 33.525819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:42 Registers: info registers vcpu 0 RAX=ffffffff863b8c12 RBX=0000000000000001 RCX=ffffffff863b8c12 RDX=1ffff11002b48ead RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015a47578 RSP=ffff888015a474b0 R8 =ffffffff863b8c16 R9 =ffff888015a47560 R10=0000000000038001 R11=000000000008b7d7 R12=ffff888015a47580 R13=ffff888015a47568 R14=ffff888015a47920 R15=ffff888015a47520 RIP=ffffffff81130b61 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 00007f1876037700 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=00007f40b220d6a0 CR3=000000000e34a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732032343a3335 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86129aaf RBX=0000000000000001 RCX=ffffffff86129aae RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c25355 RBP=ffff88801636ed30 RSP=ffff88801636ec68 R8 =ffffffff86129ab2 R9 =ffff88801636ed18 R10=0000000000038001 R11=000000000001e4ed R12=ffff88801636ed38 R13=ffff88801636ed20 R14=ffff88801636ff28 R15=ffff88801636ecd8 RIP=ffffffff81130b82 RFL=00000217 [----APC] 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 00007f6a5ca4e900 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=00007f6a5ca18008 CR3=000000000e6ae000 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=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