syzkaller login: [ 82.429209] BUG: Bad rss-counter state mm:00000000068fe699 type:MM_FILEPAGES val:33 [ 82.431061] BUG: Bad rss-counter state mm:00000000068fe699 type:MM_ANONPAGES val:22 [ 82.590621] ================================================================== [ 82.591549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.592500] Read of size 8 at addr ffff88801451f058 by task sshd/219 [ 82.593460] [ 82.593687] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.594711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.595699] Call Trace: [ 82.596022] [ 82.596310] dump_stack_lvl+0x91/0xf0 [ 82.596803] print_report+0xcc/0x620 [ 82.597304] ? __virt_addr_valid+0x102/0x340 [ 82.597872] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.598498] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.599117] kasan_report+0xbe/0xf0 [ 82.599590] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.600226] vma_interval_tree_remove+0xc75/0xec0 [ 82.600823] vma_prepare+0xc54/0x11a0 [ 82.601303] __split_vma+0x5af/0x950 [ 82.601797] ? __pfx___split_vma+0x10/0x10 [ 82.602324] ? find_held_lock+0x2c/0x110 [ 82.602838] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.603400] ? lock_is_held_type+0x9f/0x120 [ 82.603932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.604536] ? mtree_range_walk+0x632/0x900 [ 82.605126] ? mas_walk+0x5c7/0x7c0 [ 82.605609] do_vmi_munmap+0x1f1/0x2b0 [ 82.606103] mmap_region+0x1f9/0x2660 [ 82.606586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.607093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.607811] ? __pfx_lock_acquire+0x10/0x10 [ 82.608345] ? __pfx_mmap_region+0x10/0x10 [ 82.608883] ? security_mmap_addr+0x7d/0xa0 [ 82.609408] ? get_unmapped_area+0x1f5/0x3f0 [ 82.609958] do_mmap+0x854/0xf00 [ 82.610393] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.610883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.611440] ksys_mmap_pgoff+0x3af/0x500 [ 82.611938] do_syscall_64+0x3f/0x90 [ 82.612415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.613067] RIP: 0033:0x7fe968432d82 [ 82.613534] 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 [ 82.615643] RSP: 002b:00007ffe38640428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.616543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe968432d82 [ 82.617404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe96786c000 [ 82.618259] RBP: 00007fe96786c000 R08: 0000000000000009 R09: 0000000000001000 [ 82.619109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555eb0510ec0 [ 82.619962] R13: 00007ffe38640440 R14: 00007ffe38640470 R15: 00007ffe386407d0 [ 82.620820] [ 82.621115] [ 82.621332] Allocated by task 212: [ 82.621774] kasan_save_stack+0x22/0x50 [ 82.622284] kasan_set_track+0x25/0x30 [ 82.622782] __kasan_slab_alloc+0x59/0x70 [ 82.623310] kmem_cache_alloc+0x16b/0x370 [ 82.623832] vm_area_dup+0x20/0x160 [ 82.624288] __split_vma+0x170/0x950 [ 82.624759] split_vma+0xc6/0x110 [ 82.625202] mprotect_fixup+0x8d2/0xb30 [ 82.625716] do_mprotect_pkey+0x87e/0xd40 [ 82.626239] __x64_sys_mprotect+0x78/0xc0 [ 82.626766] do_syscall_64+0x3f/0x90 [ 82.627239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.627889] [ 82.628105] Freed by task 19: [ 82.628499] kasan_save_stack+0x22/0x50 [ 82.629000] kasan_set_track+0x25/0x30 [ 82.629510] kasan_save_free_info+0x2b/0x50 [ 82.630044] __kasan_slab_free+0x10a/0x190 [ 82.630579] kmem_cache_free+0x10d/0x4d0 [ 82.631091] rcu_core+0x8c8/0x2860 [ 82.631540] __do_softirq+0x1b7/0x7d4 [ 82.632015] [ 82.632229] Last potentially related work creation: [ 82.632807] kasan_save_stack+0x22/0x50 [ 82.633309] __kasan_record_aux_stack+0x8e/0xa0 [ 82.633907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.634609] remove_vma+0x139/0x170 [ 82.635062] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.635621] do_vmi_munmap+0x1f1/0x2b0 [ 82.636101] __vm_munmap+0x138/0x3a0 [ 82.636571] __x64_sys_munmap+0x59/0x80 [ 82.637070] do_syscall_64+0x3f/0x90 [ 82.637547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.638185] [ 82.638400] The buggy address belongs to the object at ffff88801451f000 [ 82.638400] which belongs to the cache vm_area_struct of size 168 [ 82.639877] The buggy address is located 88 bytes inside of [ 82.639877] freed 168-byte region [ffff88801451f000, ffff88801451f0a8) [ 82.641286] [ 82.641507] The buggy address belongs to the physical page: [ 82.642420] page:0000000079c0ad0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1451f [ 82.643716] memcg:ffff88800d00b601 [ 82.644271] flags: 0x100000000000200(slab|node=0|zone=1) [ 82.645028] page_type: 0xffffffff() [ 82.645583] raw: 0100000000000200 ffff88800879fc80 ffffea000037d740 dead000000000006 [ 82.646660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d00b601 [ 82.647715] page dumped because: kasan: bad access detected [ 82.648494] [ 82.648744] Memory state around the buggy address: [ 82.649431] ffff88801451ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 82.650444] ffff88801451ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 82.651461] >ffff88801451f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.652460] ^ [ 82.653298] ffff88801451f080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 82.654301] ffff88801451f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 82.655305] ================================================================== [ 82.656474] Disabling lock debugging due to kernel taint [ 84.616194] BUG: Bad rss-counter state mm:0000000039f60206 type:MM_FILEPAGES val:33 [ 84.617350] BUG: Bad rss-counter state mm:0000000039f60206 type:MM_ANONPAGES val:22 [ 85.187525] BUG: Bad rss-counter state mm:00000000b16dc8e7 type:MM_FILEPAGES val:33 [ 85.188844] BUG: Bad rss-counter state mm:00000000b16dc8e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52133' (ECDSA) to the list of known hosts. 2023/06/20 10:46:32 fuzzer started 2023/06/20 10:46:32 dialing manager at localhost:44161 2023/06/20 10:46:32 checking machine... 2023/06/20 10:46:32 checking revisions... [ 85.859905] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:46:33 testing simple program... [ 85.919017] cgroup: Unknown subsys name 'net' [ 85.976729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:48 Registers: info registers vcpu 0 RAX=1ffff110019fe7d7 RBX=ffff8880146409e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cff3eb8 RBP=ffff88800c5d43c0 RSP=ffff888016f5f888 R8 =0000000000000001 R9 =ffffed1002debf05 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c5d3400 R14=ffffffff83677d2f R15=ffff88800dadbe80 RIP=ffffffff8184634d RFL=00000046 [---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 00007f7207d8a700 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=00007f131d424618 CR3=000000000dcb6000 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=3a5d3832325b646873732032333a3634 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343939 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f065a57d060 CR3=000000000d984000 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=3b6415182f3daeaeb941d7bc50487d33 XMM02=2c67c8bc2e329bc30000000000126350 XMM03=fb795ef6d6577056000000000012cd18 XMM04=6a9216164b53f59800000000000ae988 XMM05=1674720c205dcf22000000000013cb70 XMM06=806171799158d967000000000013c2e0 XMM07=e042d86d42eb936e000000000012cf98 XMM08=4d26ce766ee16ff500000000001263b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000