syzkaller login: [ 30.573204] BUG: Bad rss-counter state mm:000000006a0df30f type:MM_FILEPAGES val:33 [ 30.574669] BUG: Bad rss-counter state mm:000000006a0df30f type:MM_ANONPAGES val:22 [ 30.726715] ================================================================== [ 30.727687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.728679] Read of size 8 at addr ffff88800d75eed8 by task sshd/219 [ 30.729619] [ 30.729850] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.730771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.731821] Call Trace: [ 30.732160] [ 30.732462] dump_stack_lvl+0x91/0xf0 [ 30.732982] print_report+0xcc/0x620 [ 30.733521] ? __virt_addr_valid+0x102/0x340 [ 30.734107] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734765] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735426] kasan_report+0xbe/0xf0 [ 30.735949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.736627] vma_interval_tree_remove+0xc75/0xec0 [ 30.737299] vma_prepare+0xc54/0x11a0 [ 30.737846] __split_vma+0x5af/0x950 [ 30.738370] ? __pfx___split_vma+0x10/0x10 [ 30.738954] ? find_held_lock+0x2c/0x110 [ 30.739530] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.740150] ? lock_is_held_type+0x9f/0x120 [ 30.740747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.741427] ? mtree_range_walk+0x632/0x900 [ 30.742038] ? mas_walk+0x5c7/0x7c0 [ 30.742564] do_vmi_munmap+0x1f1/0x2b0 [ 30.743114] mmap_region+0x1f9/0x2660 [ 30.743652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.744217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.745010] ? __pfx_lock_acquire+0x10/0x10 [ 30.745621] ? __pfx_mmap_region+0x10/0x10 [ 30.746213] ? security_mmap_addr+0x7d/0xa0 [ 30.746799] ? get_unmapped_area+0x1f5/0x3f0 [ 30.747411] do_mmap+0x854/0xf00 [ 30.747904] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.748452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.749074] ksys_mmap_pgoff+0x3af/0x500 [ 30.749645] do_syscall_64+0x3f/0x90 [ 30.750174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750895] RIP: 0033:0x7f6996e73d82 [ 30.751403] 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 [ 30.753788] RSP: 002b:00007ffffa216458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.754796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6996e73d82 [ 30.755744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69962ad000 [ 30.756688] RBP: 00007f69962ad000 R08: 0000000000000009 R09: 0000000000001000 [ 30.757632] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606345c3d90 [ 30.758575] R13: 00007ffffa216470 R14: 00007ffffa2164a0 R15: 00007ffffa216800 [ 30.759532] [ 30.759860] [ 30.760099] Allocated by task 212: [ 30.760576] kasan_save_stack+0x22/0x50 [ 30.761132] kasan_set_track+0x25/0x30 [ 30.761694] __kasan_slab_alloc+0x59/0x70 [ 30.762284] kmem_cache_alloc+0x16b/0x370 [ 30.762861] vm_area_dup+0x20/0x160 [ 30.763367] __split_vma+0x170/0x950 [ 30.763883] split_vma+0xc6/0x110 [ 30.764371] mprotect_fixup+0x8d2/0xb30 [ 30.764931] do_mprotect_pkey+0x87e/0xd40 [ 30.765531] __x64_sys_mprotect+0x78/0xc0 [ 30.766113] do_syscall_64+0x3f/0x90 [ 30.766639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767349] [ 30.767590] Freed by task 212: [ 30.768027] kasan_save_stack+0x22/0x50 [ 30.768581] kasan_set_track+0x25/0x30 [ 30.769138] kasan_save_free_info+0x2b/0x50 [ 30.769915] __kasan_slab_free+0x10a/0x190 [ 30.770600] kmem_cache_free+0x10d/0x4d0 [ 30.771240] rcu_core+0x8c8/0x2860 [ 30.771785] __do_softirq+0x1b7/0x7d4 [ 30.772376] [ 30.772646] Last potentially related work creation: [ 30.773382] kasan_save_stack+0x22/0x50 [ 30.774047] __kasan_record_aux_stack+0x8e/0xa0 [ 30.774745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.775543] remove_vma+0x139/0x170 [ 30.776108] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.776810] do_vmi_munmap+0x1f1/0x2b0 [ 30.777415] __vm_munmap+0x138/0x3a0 [ 30.777987] __x64_sys_munmap+0x59/0x80 [ 30.778609] do_syscall_64+0x3f/0x90 [ 30.779205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779996] [ 30.780257] The buggy address belongs to the object at ffff88800d75ee80 [ 30.780257] which belongs to the cache vm_area_struct of size 168 [ 30.782112] The buggy address is located 88 bytes inside of [ 30.782112] freed 168-byte region [ffff88800d75ee80, ffff88800d75ef28) [ 30.783899] [ 30.784171] The buggy address belongs to the physical page: [ 30.785011] page:000000004019db8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd75e [ 30.786393] memcg:ffff88800f763401 [ 30.786834] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.787478] page_type: 0xffffffff() [ 30.787935] raw: 0100000000000200 ffff88800879fc80 ffffea00005ade40 0000000000000006 [ 30.788853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f763401 [ 30.789764] page dumped because: kasan: bad access detected [ 30.790422] [ 30.790640] Memory state around the buggy address: [ 30.791218] ffff88800d75ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.792071] ffff88800d75ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.792935] >ffff88800d75ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.793813] ^ [ 30.794540] ffff88800d75ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.795389] ffff88800d75ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.796239] ================================================================== [ 30.797286] Disabling lock debugging due to kernel taint [ 32.642236] BUG: Bad rss-counter state mm:000000004727823a type:MM_FILEPAGES val:33 [ 32.643283] BUG: Bad rss-counter state mm:000000004727823a type:MM_ANONPAGES val:22 [ 33.093407] BUG: Bad rss-counter state mm:0000000058ed6bcc type:MM_FILEPAGES val:33 [ 33.094425] BUG: Bad rss-counter state mm:0000000058ed6bcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59921' (ECDSA) to the list of known hosts. 2023/06/19 20:01:28 fuzzer started 2023/06/19 20:01:28 dialing manager at localhost:44161 2023/06/19 20:01:28 checking machine... 2023/06/19 20:01:28 checking revisions... [ 33.807365] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:01:28 testing simple program... [ 33.845816] cgroup: Unknown subsys name 'net' [ 33.882537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:28 Registers: info registers vcpu 0 RAX=0000000000000078 RBX=ffff88800ffae2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ffae300 RBP=ffff8880186a3e60 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880186a3e60 R14=ffffffff813782a8 R15=ffff8880186a3e60 RIP=ffffffff8184638b 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 00007fa4114ba900 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=00007ffe6359a000 CR3=000000000d6ac000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f168eb668e0 CR3=000000000e86a000 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=31303a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000