syzkaller login: [ 30.943931] BUG: Bad rss-counter state mm:0000000030daa4d7 type:MM_FILEPAGES val:33 [ 30.946113] BUG: Bad rss-counter state mm:0000000030daa4d7 type:MM_ANONPAGES val:22 [ 31.117439] ================================================================== [ 31.118652] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.120059] Read of size 8 at addr ffff8880181195c8 by task sshd/220 [ 31.120984] [ 31.121223] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.122194] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.123262] Call Trace: [ 31.123619] [ 31.123934] dump_stack_lvl+0x91/0xf0 [ 31.124483] print_report+0xcc/0x620 [ 31.125002] ? __virt_addr_valid+0x102/0x340 [ 31.125590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126241] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126893] kasan_report+0xbe/0xf0 [ 31.127393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.128053] vma_interval_tree_remove+0xc75/0xec0 [ 31.128698] vma_prepare+0xc54/0x11a0 [ 31.129214] __split_vma+0x5af/0x950 [ 31.129721] ? __pfx___split_vma+0x10/0x10 [ 31.130281] ? find_held_lock+0x2c/0x110 [ 31.130832] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.131429] ? lock_is_held_type+0x9f/0x120 [ 31.132007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.132679] ? mtree_range_walk+0x632/0x900 [ 31.133271] ? mas_walk+0x5c7/0x7c0 [ 31.133784] do_vmi_munmap+0x1f1/0x2b0 [ 31.134314] mmap_region+0x1f9/0x2660 [ 31.134829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.135371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.136133] ? __pfx_lock_acquire+0x10/0x10 [ 31.136698] ? __pfx_mmap_region+0x10/0x10 [ 31.137262] ? security_mmap_addr+0x7d/0xa0 [ 31.137832] ? get_unmapped_area+0x1f5/0x3f0 [ 31.138423] do_mmap+0x854/0xf00 [ 31.138894] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.139417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.140031] ksys_mmap_pgoff+0x3af/0x500 [ 31.140567] do_syscall_64+0x3f/0x90 [ 31.141088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141780] RIP: 0033:0x7f01283f9d82 [ 31.142271] 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 [ 31.144554] RSP: 002b:00007ffcae8116b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.145513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01283f9d82 [ 31.146429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0127833000 [ 31.147335] RBP: 00007f0127833000 R08: 0000000000000009 R09: 0000000000001000 [ 31.148244] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d159e1bd90 [ 31.149123] R13: 00007ffcae8116d0 R14: 00007ffcae811700 R15: 00007ffcae811a60 [ 31.149977] [ 31.150266] [ 31.150479] Allocated by task 213: [ 31.150903] kasan_save_stack+0x22/0x50 [ 31.151403] kasan_set_track+0x25/0x30 [ 31.151893] __kasan_slab_alloc+0x59/0x70 [ 31.152418] kmem_cache_alloc+0x16b/0x370 [ 31.152931] vm_area_dup+0x20/0x160 [ 31.153377] __split_vma+0x170/0x950 [ 31.153836] split_vma+0xc6/0x110 [ 31.154269] mprotect_fixup+0x8d2/0xb30 [ 31.154772] do_mprotect_pkey+0x87e/0xd40 [ 31.155282] __x64_sys_mprotect+0x78/0xc0 [ 31.155830] do_syscall_64+0x3f/0x90 [ 31.156317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156975] [ 31.157196] Freed by task 213: [ 31.157588] kasan_save_stack+0x22/0x50 [ 31.158085] kasan_set_track+0x25/0x30 [ 31.158579] kasan_save_free_info+0x2b/0x50 [ 31.159111] __kasan_slab_free+0x10a/0x190 [ 31.159642] kmem_cache_free+0x10d/0x4d0 [ 31.160229] rcu_core+0x8c8/0x2860 [ 31.160696] __do_softirq+0x1b7/0x7d4 [ 31.161231] [ 31.161470] Last potentially related work creation: [ 31.162123] kasan_save_stack+0x22/0x50 [ 31.162679] __kasan_record_aux_stack+0x8e/0xa0 [ 31.163314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.164046] remove_vma+0x139/0x170 [ 31.164557] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.165182] do_vmi_munmap+0x1f1/0x2b0 [ 31.165724] __vm_munmap+0x138/0x3a0 [ 31.166239] __x64_sys_munmap+0x59/0x80 [ 31.166789] do_syscall_64+0x3f/0x90 [ 31.167313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168029] [ 31.168276] The buggy address belongs to the object at ffff888018119570 [ 31.168276] which belongs to the cache vm_area_struct of size 168 [ 31.169911] The buggy address is located 88 bytes inside of [ 31.169911] freed 168-byte region [ffff888018119570, ffff888018119618) [ 31.171462] [ 31.171700] The buggy address belongs to the physical page: [ 31.172451] page:0000000054134131 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18119 [ 31.173633] memcg:ffff8880168be101 [ 31.174102] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.174806] page_type: 0xffffffff() [ 31.175299] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.176326] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168be101 [ 31.177329] page dumped because: kasan: bad access detected [ 31.178062] [ 31.178298] Memory state around the buggy address: [ 31.178933] ffff888018119480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.179873] ffff888018119500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.180821] >ffff888018119580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.181752] ^ [ 31.182480] ffff888018119600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.183428] ffff888018119680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.184368] ================================================================== [ 31.185399] Disabling lock debugging due to kernel taint [ 32.845716] BUG: Bad rss-counter state mm:00000000ebdb247a type:MM_FILEPAGES val:33 [ 32.846441] BUG: Bad rss-counter state mm:00000000ebdb247a type:MM_ANONPAGES val:22 [ 33.392095] BUG: Bad rss-counter state mm:000000009693f50b type:MM_FILEPAGES val:33 [ 33.393255] BUG: Bad rss-counter state mm:000000009693f50b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17227' (ECDSA) to the list of known hosts. 2023/06/21 07:07:47 fuzzer started 2023/06/21 07:07:47 dialing manager at localhost:36067 2023/06/21 07:07:47 checking machine... 2023/06/21 07:07:47 checking revisions... [ 34.055873] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:07:47 testing simple program... [ 34.102969] cgroup: Unknown subsys name 'net' [ 34.180566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:07:47 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=00007ffeeb464768 CR3=00000000164b8000 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=2037343a37303a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a37303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000008 RBX=000000000000002e RCX=00007fff1b2e9720 RDX=0000000000000000 RSI=00007fff1b2e9720 RDI=00007fff1b2e9860 RBP=00007fff1b2e9720 RSP=00007fff1b2e96c8 R8 =0000000000000000 R9 =0000000000000008 R10=00007fff1b2e9467 R11=0000000000000000 R12=000055b045eb22b0 R13=00007fff1b2e9860 R14=000055b045eb52b0 R15=00007fff1b2e9860 RIP=00007fcd62900ff3 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd623ac900 00000000 00000000 GS =0000 0000000000000000 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=00007fcd62963618 CR3=000000000f06a000 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=25252525252525252525252525252525 XMM01=00000000000000ffffffffffff00ff00 XMM02=0000000000000000ffffffffff000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000