syzkaller login: [ 30.936732] BUG: Bad rss-counter state mm:00000000b873c431 type:MM_FILEPAGES val:33 [ 30.937755] BUG: Bad rss-counter state mm:00000000b873c431 type:MM_ANONPAGES val:22 [ 31.104292] ================================================================== [ 31.105222] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.106166] Read of size 8 at addr ffff88800e326a50 by task sshd/223 [ 31.106934] [ 31.107292] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.108240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.109222] Call Trace: [ 31.109543] [ 31.109829] dump_stack_lvl+0x91/0xf0 [ 31.110347] print_report+0xcc/0x620 [ 31.110900] ? __virt_addr_valid+0x102/0x340 [ 31.111536] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112948] kasan_report+0xbe/0xf0 [ 31.113496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114224] vma_interval_tree_remove+0xc75/0xec0 [ 31.114915] vma_prepare+0xc54/0x11a0 [ 31.115471] __split_vma+0x5af/0x950 [ 31.116009] ? __pfx___split_vma+0x10/0x10 [ 31.116616] ? find_held_lock+0x2c/0x110 [ 31.117220] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.117868] ? lock_is_held_type+0x9f/0x120 [ 31.118490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.119189] ? mtree_range_walk+0x632/0x900 [ 31.119772] ? mas_walk+0x5c7/0x7c0 [ 31.120257] do_vmi_munmap+0x1f1/0x2b0 [ 31.120746] mmap_region+0x1f9/0x2660 [ 31.121230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.121740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.122481] ? __pfx_lock_acquire+0x10/0x10 [ 31.123016] ? __pfx_mmap_region+0x10/0x10 [ 31.123548] ? security_mmap_addr+0x7d/0xa0 [ 31.124081] ? get_unmapped_area+0x1f5/0x3f0 [ 31.124632] do_mmap+0x854/0xf00 [ 31.125074] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.125566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.126138] ksys_mmap_pgoff+0x3af/0x500 [ 31.126642] do_syscall_64+0x3f/0x90 [ 31.127127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.127773] RIP: 0033:0x7f96d2eb4d82 [ 31.128231] 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 [ 31.130361] RSP: 002b:00007fff5b8ba128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.131275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96d2eb4d82 [ 31.132125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96d22ee000 [ 31.132973] RBP: 00007f96d22ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.133827] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cd38bfb20 [ 31.134687] R13: 00007fff5b8ba140 R14: 00007fff5b8ba170 R15: 00007fff5b8ba4d0 [ 31.135558] [ 31.135850] [ 31.136064] Allocated by task 216: [ 31.136507] kasan_save_stack+0x22/0x50 [ 31.137088] kasan_set_track+0x25/0x30 [ 31.137669] __kasan_slab_alloc+0x59/0x70 [ 31.138299] kmem_cache_alloc+0x16b/0x370 [ 31.138907] vm_area_dup+0x20/0x160 [ 31.139435] __split_vma+0x170/0x950 [ 31.139959] split_vma+0xc6/0x110 [ 31.140450] mprotect_fixup+0x8d2/0xb30 [ 31.141016] do_mprotect_pkey+0x87e/0xd40 [ 31.141609] __x64_sys_mprotect+0x78/0xc0 [ 31.142236] do_syscall_64+0x3f/0x90 [ 31.142781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.143509] [ 31.143757] Freed by task 211: [ 31.144207] kasan_save_stack+0x22/0x50 [ 31.144786] kasan_set_track+0x25/0x30 [ 31.145345] kasan_save_free_info+0x2b/0x50 [ 31.145914] __kasan_slab_free+0x10a/0x190 [ 31.146472] kmem_cache_free+0x10d/0x4d0 [ 31.146987] rcu_core+0x8c8/0x2860 [ 31.147437] __do_softirq+0x1b7/0x7d4 [ 31.147916] [ 31.148136] Last potentially related work creation: [ 31.148814] kasan_save_stack+0x22/0x50 [ 31.149320] __kasan_record_aux_stack+0x8e/0xa0 [ 31.149891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.150550] remove_vma+0x139/0x170 [ 31.151005] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.151568] do_vmi_munmap+0x1f1/0x2b0 [ 31.152058] __vm_munmap+0x138/0x3a0 [ 31.152530] __x64_sys_munmap+0x59/0x80 [ 31.153023] do_syscall_64+0x3f/0x90 [ 31.153496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154144] [ 31.154360] Second to last potentially related work creation: [ 31.155047] kasan_save_stack+0x22/0x50 [ 31.155553] __kasan_record_aux_stack+0x8e/0xa0 [ 31.156129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.156771] remove_vma+0x139/0x170 [ 31.157228] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.157788] do_vmi_munmap+0x1f1/0x2b0 [ 31.158293] mmap_region+0x1f9/0x2660 [ 31.158771] do_mmap+0x854/0xf00 [ 31.159203] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.159686] ksys_mmap_pgoff+0x3af/0x500 [ 31.160192] do_syscall_64+0x3f/0x90 [ 31.160668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161314] [ 31.161531] The buggy address belongs to the object at ffff88800e3269f8 [ 31.161531] which belongs to the cache vm_area_struct of size 168 [ 31.163014] The buggy address is located 88 bytes inside of [ 31.163014] freed 168-byte region [ffff88800e3269f8, ffff88800e326aa0) [ 31.164440] [ 31.164660] The buggy address belongs to the physical page: [ 31.165337] page:000000006839003e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe326 [ 31.166450] memcg:ffff88800e5a7f01 [ 31.166887] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.167589] page_type: 0xffffffff() [ 31.168045] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b9480 dead000000000009 [ 31.168983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5a7f01 [ 31.169913] page dumped because: kasan: bad access detected [ 31.170600] [ 31.170821] Memory state around the buggy address: [ 31.171400] ffff88800e326900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.172275] ffff88800e326980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.173137] >ffff88800e326a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.174010] ^ [ 31.174721] ffff88800e326a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.175580] ffff88800e326b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.176427] ================================================================== [ 31.177353] Disabling lock debugging due to kernel taint [ 33.179051] BUG: Bad rss-counter state mm:00000000bacac6d3 type:MM_FILEPAGES val:33 [ 33.180527] BUG: Bad rss-counter state mm:00000000bacac6d3 type:MM_ANONPAGES val:22 [ 33.611481] BUG: Bad rss-counter state mm:00000000722149d5 type:MM_FILEPAGES val:33 [ 33.612669] BUG: Bad rss-counter state mm:00000000722149d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63967' (ECDSA) to the list of known hosts. 2023/06/21 02:25:54 fuzzer started 2023/06/21 02:25:55 dialing manager at localhost:36067 2023/06/21 02:25:55 checking machine... 2023/06/21 02:25:55 checking revisions... [ 34.357327] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:25:55 testing simple program... [ 34.410763] cgroup: Unknown subsys name 'net' [ 34.446826] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000560144013bf0 RCX=0000560143fd1010 RDX=0000000000000000 RSI=0000000000000004 RDI=0000560144018290 RBP=0000000000000000 RSP=00007ffcc4bc3040 R8 =0000000000008000 R9 =0000000000000000 R10=0000000000004000 R11=0000000000000246 R12=0000000000000006 R13=0000560143ff0350 R14=0000000000000000 R15=0000000000000001 RIP=00007f6649cb9dfb RFL=00000202 [-------] 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 00007f6649194900 00000000 00000000 GS =0000 0000000000000000 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=00007fb8241f9480 CR3=000000000e406000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe6688e798 CR3=0000000018e78000 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=2034353a35323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000