syzkaller login: [ 30.922772] BUG: Bad rss-counter state mm:000000002dbdadf2 type:MM_FILEPAGES val:33 [ 30.924013] BUG: Bad rss-counter state mm:000000002dbdadf2 type:MM_ANONPAGES val:22 [ 31.079667] ================================================================== [ 31.080590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.081534] Read of size 8 at addr ffff88800db64310 by task sshd/220 [ 31.082301] [ 31.082529] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.083567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.084553] Call Trace: [ 31.084880] [ 31.085166] dump_stack_lvl+0x91/0xf0 [ 31.085686] print_report+0xcc/0x620 [ 31.086172] ? __virt_addr_valid+0x102/0x340 [ 31.086731] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.087374] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.087992] kasan_report+0xbe/0xf0 [ 31.088468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089096] vma_interval_tree_remove+0xc75/0xec0 [ 31.089712] vma_prepare+0xc54/0x11a0 [ 31.090194] __split_vma+0x5af/0x950 [ 31.090672] ? __pfx___split_vma+0x10/0x10 [ 31.091216] ? find_held_lock+0x2c/0x110 [ 31.091743] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.092311] ? lock_is_held_type+0x9f/0x120 [ 31.092856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.093471] ? mtree_range_walk+0x632/0x900 [ 31.094019] ? mas_walk+0x5c7/0x7c0 [ 31.094494] do_vmi_munmap+0x1f1/0x2b0 [ 31.094993] mmap_region+0x1f9/0x2660 [ 31.095504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.096021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.096739] ? __pfx_lock_acquire+0x10/0x10 [ 31.097273] ? __pfx_mmap_region+0x10/0x10 [ 31.097810] ? security_mmap_addr+0x7d/0xa0 [ 31.098346] ? get_unmapped_area+0x1f5/0x3f0 [ 31.098903] do_mmap+0x854/0xf00 [ 31.099351] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.099856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.100418] ksys_mmap_pgoff+0x3af/0x500 [ 31.100931] do_syscall_64+0x3f/0x90 [ 31.101411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102061] RIP: 0033:0x7f05c2a3ad82 [ 31.102524] 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 [ 31.104647] RSP: 002b:00007fff5899fa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.105554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05c2a3ad82 [ 31.106406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05c1e74000 [ 31.107271] RBP: 00007f05c1e74000 R08: 0000000000000009 R09: 0000000000001000 [ 31.108113] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653b9694d90 [ 31.108963] R13: 00007fff5899fa90 R14: 00007fff5899fac0 R15: 00007fff5899fe20 [ 31.109816] [ 31.110125] [ 31.110341] Allocated by task 213: [ 31.110771] kasan_save_stack+0x22/0x50 [ 31.111287] kasan_set_track+0x25/0x30 [ 31.111780] __kasan_slab_alloc+0x59/0x70 [ 31.112311] kmem_cache_alloc+0x16b/0x370 [ 31.112833] vm_area_dup+0x20/0x160 [ 31.113290] __split_vma+0x170/0x950 [ 31.113764] split_vma+0xc6/0x110 [ 31.114213] mprotect_fixup+0x8d2/0xb30 [ 31.114722] do_mprotect_pkey+0x87e/0xd40 [ 31.115265] __x64_sys_mprotect+0x78/0xc0 [ 31.115788] do_syscall_64+0x3f/0x90 [ 31.116271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.116912] [ 31.117130] Freed by task 213: [ 31.117526] kasan_save_stack+0x22/0x50 [ 31.118034] kasan_set_track+0x25/0x30 [ 31.118533] kasan_save_free_info+0x2b/0x50 [ 31.119082] __kasan_slab_free+0x10a/0x190 [ 31.119617] kmem_cache_free+0x10d/0x4d0 [ 31.120129] rcu_core+0x8c8/0x2860 [ 31.120580] __do_softirq+0x1b7/0x7d4 [ 31.121056] [ 31.121269] Last potentially related work creation: [ 31.121859] kasan_save_stack+0x22/0x50 [ 31.122360] __kasan_record_aux_stack+0x8e/0xa0 [ 31.122930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.123597] remove_vma+0x139/0x170 [ 31.124052] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.124617] do_vmi_munmap+0x1f1/0x2b0 [ 31.125186] __vm_munmap+0x138/0x3a0 [ 31.125664] __x64_sys_munmap+0x59/0x80 [ 31.126159] do_syscall_64+0x3f/0x90 [ 31.126640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127290] [ 31.127506] The buggy address belongs to the object at ffff88800db642b8 [ 31.127506] which belongs to the cache vm_area_struct of size 168 [ 31.128969] The buggy address is located 88 bytes inside of [ 31.128969] freed 168-byte region [ffff88800db642b8, ffff88800db64360) [ 31.130396] [ 31.130614] The buggy address belongs to the physical page: [ 31.131277] page:000000003557e84d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb64 [ 31.132362] memcg:ffff888016e15f01 [ 31.132792] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.133438] page_type: 0xffffffff() [ 31.133891] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.134804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e15f01 [ 31.135732] page dumped because: kasan: bad access detected [ 31.136394] [ 31.136613] Memory state around the buggy address: [ 31.137204] ffff88800db64200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.138082] ffff88800db64280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.138939] >ffff88800db64300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.139803] ^ [ 31.140267] ffff88800db64380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.141115] ffff88800db64400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.141972] ================================================================== [ 31.142900] Disabling lock debugging due to kernel taint [ 33.063455] BUG: Bad rss-counter state mm:00000000cf54e1cd type:MM_FILEPAGES val:33 [ 33.064533] BUG: Bad rss-counter state mm:00000000cf54e1cd type:MM_ANONPAGES val:22 [ 33.542469] BUG: Bad rss-counter state mm:00000000ea300f0f type:MM_FILEPAGES val:33 [ 33.544229] BUG: Bad rss-counter state mm:00000000ea300f0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7634' (ECDSA) to the list of known hosts. 2023/06/20 15:11:58 fuzzer started 2023/06/20 15:11:59 dialing manager at localhost:36067 2023/06/20 15:11:59 checking machine... 2023/06/20 15:11:59 checking revisions... [ 34.289651] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:11:59 testing simple program... [ 34.343962] cgroup: Unknown subsys name 'net' [ 34.403108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:11:58 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=0000000000000001 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=000055d5d2541790 CR3=0000000005482000 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=00007f82f3dcf510000055a80db65790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000005 RCX=ffffffff81f2fce1 RDX=ffff888009533680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801066ee40 RSP=ffff88801874f9f8 R8 =0000000000000005 R9 =000000000000017f R10=0000000000000170 R11=0000000000000000 R12=0000000000000170 R13=0000000000000030 R14=dffffc0000000000 R15=0000000000001032 RIP=ffffffff814c0261 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 00007f9075828900 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=00007f9075de00b0 CR3=000000000db30000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000