syzkaller login: [ 79.430901] BUG: Bad rss-counter state mm:00000000c72739b2 type:MM_FILEPAGES val:33 [ 79.431730] BUG: Bad rss-counter state mm:00000000c72739b2 type:MM_ANONPAGES val:22 [ 79.611060] ================================================================== [ 79.611679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 79.612345] Read of size 8 at addr ffff88800d083798 by task sshd/223 [ 79.612838] [ 79.612980] CPU: 0 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 79.613651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 79.614274] Call Trace: [ 79.614481] [ 79.614668] dump_stack_lvl+0x91/0xf0 [ 79.614988] print_report+0xcc/0x620 [ 79.615303] ? __virt_addr_valid+0x102/0x340 [ 79.615657] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.616543] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.616963] kasan_report+0xbe/0xf0 [ 79.617328] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.617727] vma_interval_tree_remove+0xc75/0xec0 [ 79.618113] vma_prepare+0xc54/0x11a0 [ 79.618473] __split_vma+0x5af/0x950 [ 79.618777] ? __pfx___split_vma+0x10/0x10 [ 79.619112] ? find_held_lock+0x2c/0x110 [ 79.619532] do_vmi_align_munmap+0x2ba/0x11f0 [ 79.619895] ? lock_is_held_type+0x9f/0x120 [ 79.621332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 79.621722] ? mtree_range_walk+0x632/0x900 [ 79.622076] ? mas_walk+0x5c7/0x7c0 [ 79.622433] do_vmi_munmap+0x1f1/0x2b0 [ 79.622761] mmap_region+0x1f9/0x2660 [ 79.623071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 79.623484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 79.623943] ? __pfx_lock_acquire+0x10/0x10 [ 79.624367] ? __pfx_mmap_region+0x10/0x10 [ 79.624715] ? security_mmap_addr+0x7d/0xa0 [ 79.625055] ? get_unmapped_area+0x1f5/0x3f0 [ 79.625463] do_mmap+0x854/0xf00 [ 79.625747] vm_mmap_pgoff+0x1a6/0x3a0 [ 79.626062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 79.626479] ksys_mmap_pgoff+0x3af/0x500 [ 79.626806] do_syscall_64+0x3f/0x90 [ 79.627113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.627601] RIP: 0033:0x7efd08fffd82 [ 79.627895] 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 [ 79.629359] RSP: 002b:00007ffd69376b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 79.629931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd08fffd82 [ 79.630525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd08439000 [ 79.631062] RBP: 00007efd08439000 R08: 0000000000000009 R09: 0000000000001000 [ 79.631672] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8c164fd90 [ 79.632274] R13: 00007ffd69376b90 R14: 00007ffd69376bc0 R15: 00007ffd69376f20 [ 79.632814] [ 79.633001] [ 79.633138] Allocated by task 213: [ 79.633481] kasan_save_stack+0x22/0x50 [ 79.633808] kasan_set_track+0x25/0x30 [ 79.634122] __kasan_slab_alloc+0x59/0x70 [ 79.634508] kmem_cache_alloc+0x16b/0x370 [ 79.634840] vm_area_dup+0x20/0x160 [ 79.635131] __split_vma+0x170/0x950 [ 79.635503] split_vma+0xc6/0x110 [ 79.635784] mprotect_fixup+0x8d2/0xb30 [ 79.636132] do_mprotect_pkey+0x87e/0xd40 [ 79.636530] __x64_sys_mprotect+0x78/0xc0 [ 79.636864] do_syscall_64+0x3f/0x90 [ 79.637221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.637641] [ 79.637778] Freed by task 213: [ 79.638028] kasan_save_stack+0x22/0x50 [ 79.638405] kasan_set_track+0x25/0x30 [ 79.638724] kasan_save_free_info+0x2b/0x50 [ 79.639067] __kasan_slab_free+0x10a/0x190 [ 79.639494] kmem_cache_free+0x10d/0x4d0 [ 79.639821] rcu_core+0x8c8/0x2860 [ 79.644307] __do_softirq+0x1b7/0x7d4 [ 79.644620] [ 79.644760] Last potentially related work creation: [ 79.645130] kasan_save_stack+0x22/0x50 [ 79.645507] __kasan_record_aux_stack+0x8e/0xa0 [ 79.645875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 79.646339] remove_vma+0x139/0x170 [ 79.646629] do_vmi_align_munmap+0xd4a/0x11f0 [ 79.646983] do_vmi_munmap+0x1f1/0x2b0 [ 79.647421] __vm_munmap+0x138/0x3a0 [ 79.647724] __x64_sys_munmap+0x59/0x80 [ 79.648056] do_syscall_64+0x3f/0x90 [ 79.648935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.649411] [ 79.649551] Second to last potentially related work creation: [ 79.649980] kasan_save_stack+0x22/0x50 [ 79.650401] __kasan_record_aux_stack+0x8e/0xa0 [ 79.650771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 79.651267] remove_vma+0x139/0x170 [ 79.651563] do_vmi_align_munmap+0xd4a/0x11f0 [ 79.651923] do_vmi_munmap+0x1f1/0x2b0 [ 79.652311] mmap_region+0x1f9/0x2660 [ 79.652631] do_mmap+0x854/0xf00 [ 79.652916] vm_mmap_pgoff+0x1a6/0x3a0 [ 79.653330] ksys_mmap_pgoff+0x3af/0x500 [ 79.653657] do_syscall_64+0x3f/0x90 [ 79.653961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.654471] [ 79.654612] The buggy address belongs to the object at ffff88800d083740 [ 79.654612] which belongs to the cache vm_area_struct of size 168 [ 79.655647] The buggy address is located 88 bytes inside of [ 79.655647] freed 168-byte region [ffff88800d083740, ffff88800d0837e8) [ 79.656671] [ 79.656815] The buggy address belongs to the physical page: [ 79.657314] page:000000004d550c98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd083 [ 79.658023] memcg:ffff88800ed21f01 [ 79.658347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 79.658794] page_type: 0xffffffff() [ 79.659082] raw: 0100000000000200 ffff88800879fc80 ffffea0000399800 dead000000000005 [ 79.659741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed21f01 [ 79.660397] page dumped because: kasan: bad access detected [ 79.660817] [ 79.660954] Memory state around the buggy address: [ 79.661375] ffff88800d083680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 79.661918] ffff88800d083700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 79.662516] >ffff88800d083780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 79.663050] ^ [ 79.663453] ffff88800d083800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 79.663995] ffff88800d083880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 79.664616] ================================================================== [ 79.668584] Disabling lock debugging due to kernel taint [ 84.114056] BUG: Bad rss-counter state mm:0000000016211623 type:MM_FILEPAGES val:33 [ 84.114718] BUG: Bad rss-counter state mm:0000000016211623 type:MM_ANONPAGES val:22 [ 85.629056] BUG: Bad rss-counter state mm:000000001cfcd6ef type:MM_FILEPAGES val:33 [ 85.636681] BUG: Bad rss-counter state mm:000000001cfcd6ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43973' (ECDSA) to the list of known hosts. 2023/06/20 10:01:49 fuzzer started 2023/06/20 10:01:49 dialing manager at localhost:44161 2023/06/20 10:01:49 checking machine... 2023/06/20 10:01:49 checking revisions... [ 86.514216] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:01:49 testing simple program... [ 86.593399] cgroup: Unknown subsys name 'net' [ 86.699353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:08 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800b868000 RCX=0000000000000000 RDX=1ffff1100170d208 RSI=ffffffff8301b1cf RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800b869040 R15=000000000000000a RIP=ffffffff8301b1f7 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 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=00007fddfe52d328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007ff7d6855df0 CR3=0000000018d9e000 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=2038343a31303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000