syzkaller login: [ 31.635248] BUG: Bad rss-counter state mm:00000000504507bb type:MM_FILEPAGES val:33 [ 31.636402] BUG: Bad rss-counter state mm:00000000504507bb type:MM_ANONPAGES val:22 [ 31.782946] ================================================================== [ 31.784026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.785164] Read of size 8 at addr ffff88800eb78880 by task sshd/220 [ 31.786126] [ 31.786343] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.787200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.788187] Call Trace: [ 31.788509] [ 31.788793] dump_stack_lvl+0x91/0xf0 [ 31.789295] print_report+0xcc/0x620 [ 31.789780] ? __virt_addr_valid+0x102/0x340 [ 31.790327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791551] kasan_report+0xbe/0xf0 [ 31.792024] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.792638] vma_interval_tree_remove+0xc75/0xec0 [ 31.793259] vma_prepare+0xc54/0x11a0 [ 31.793738] __split_vma+0x5af/0x950 [ 31.794215] ? __pfx___split_vma+0x10/0x10 [ 31.794741] ? find_held_lock+0x2c/0x110 [ 31.795263] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.795831] ? lock_is_held_type+0x9f/0x120 [ 31.796370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.796978] ? mtree_range_walk+0x632/0x900 [ 31.797555] ? mas_walk+0x5c7/0x7c0 [ 31.798029] do_vmi_munmap+0x1f1/0x2b0 [ 31.798522] mmap_region+0x1f9/0x2660 [ 31.799010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.799536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.800254] ? __pfx_lock_acquire+0x10/0x10 [ 31.800784] ? __pfx_mmap_region+0x10/0x10 [ 31.801321] ? security_mmap_addr+0x7d/0xa0 [ 31.801855] ? get_unmapped_area+0x1f5/0x3f0 [ 31.802409] do_mmap+0x854/0xf00 [ 31.802852] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.803349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.803908] ksys_mmap_pgoff+0x3af/0x500 [ 31.804416] do_syscall_64+0x3f/0x90 [ 31.804889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.805559] RIP: 0033:0x7fc91e4e1d82 [ 31.806019] 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 [ 31.808157] RSP: 002b:00007ffff3afd6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.809069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc91e4e1d82 [ 31.809949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc91d91b000 [ 31.810809] RBP: 00007fc91d91b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.811663] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db81953d90 [ 31.812518] R13: 00007ffff3afd6f0 R14: 00007ffff3afd720 R15: 00007ffff3afda80 [ 31.813386] [ 31.813686] [ 31.813905] Allocated by task 213: [ 31.814335] kasan_save_stack+0x22/0x50 [ 31.814843] kasan_set_track+0x25/0x30 [ 31.815339] __kasan_slab_alloc+0x59/0x70 [ 31.815861] kmem_cache_alloc+0x16b/0x370 [ 31.816379] vm_area_dup+0x20/0x160 [ 31.816842] __split_vma+0x170/0x950 [ 31.817330] split_vma+0xc6/0x110 [ 31.817776] mprotect_fixup+0x8d2/0xb30 [ 31.818281] do_mprotect_pkey+0x87e/0xd40 [ 31.818796] __x64_sys_mprotect+0x78/0xc0 [ 31.819327] do_syscall_64+0x3f/0x90 [ 31.819800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.820441] [ 31.820658] Freed by task 213: [ 31.821050] kasan_save_stack+0x22/0x50 [ 31.821560] kasan_set_track+0x25/0x30 [ 31.822059] kasan_save_free_info+0x2b/0x50 [ 31.822606] __kasan_slab_free+0x10a/0x190 [ 31.823135] kmem_cache_free+0x10d/0x4d0 [ 31.823643] rcu_core+0x8c8/0x2860 [ 31.824088] __do_softirq+0x1b7/0x7d4 [ 31.824562] [ 31.824777] Last potentially related work creation: [ 31.825374] kasan_save_stack+0x22/0x50 [ 31.825877] __kasan_record_aux_stack+0x8e/0xa0 [ 31.826456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.827102] remove_vma+0x139/0x170 [ 31.827557] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.828114] do_vmi_munmap+0x1f1/0x2b0 [ 31.828602] __vm_munmap+0x138/0x3a0 [ 31.829075] __x64_sys_munmap+0x59/0x80 [ 31.829582] do_syscall_64+0x3f/0x90 [ 31.830053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.830701] [ 31.830918] The buggy address belongs to the object at ffff88800eb78828 [ 31.830918] which belongs to the cache vm_area_struct of size 168 [ 31.832396] The buggy address is located 88 bytes inside of [ 31.832396] freed 168-byte region [ffff88800eb78828, ffff88800eb788d0) [ 31.833855] [ 31.834074] The buggy address belongs to the physical page: [ 31.834737] page:000000008544e50e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb78 [ 31.835835] memcg:ffff8880199ece01 [ 31.836261] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.836905] page_type: 0xffffffff() [ 31.837380] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.838300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199ece01 [ 31.839213] page dumped because: kasan: bad access detected [ 31.839883] [ 31.840101] Memory state around the buggy address: [ 31.840686] ffff88800eb78780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.841549] ffff88800eb78800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.842411] >ffff88800eb78880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.843264] ^ [ 31.843675] ffff88800eb78900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.844531] ffff88800eb78980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.845406] ================================================================== [ 31.846397] Disabling lock debugging due to kernel taint [ 33.962012] BUG: Bad rss-counter state mm:00000000b9b6dac4 type:MM_FILEPAGES val:33 [ 33.963011] BUG: Bad rss-counter state mm:00000000b9b6dac4 type:MM_ANONPAGES val:22 [ 34.420018] BUG: Bad rss-counter state mm:0000000015ac9dd7 type:MM_FILEPAGES val:33 [ 34.421001] BUG: Bad rss-counter state mm:0000000015ac9dd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55806' (ECDSA) to the list of known hosts. 2023/06/20 03:07:09 fuzzer started 2023/06/20 03:07:09 dialing manager at localhost:44161 2023/06/20 03:07:09 checking machine... 2023/06/20 03:07:09 checking revisions... [ 35.150153] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:07:09 testing simple program... [ 35.204305] cgroup: Unknown subsys name 'net' [ 35.240791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:07:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017af51c0 RCX=0000000000000000 RDX=ffff888017af51c0 RSI=000000000000013b RDI=ffffffff849ef220 RBP=ffffffff849ef220 RSP=ffff88800ff5f9a8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=000000000000013b R13=ffffea0000619dc0 R14=0000000000000508 R15=ffff88800ff5fdb0 RIP=ffffffff81704af7 RFL=00000293 [--S-A-C] 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 00007f10804ef900 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=00007f1080aa70b0 CR3=0000000016e8c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007fe3685f25d0 CR3=0000000013a8c000 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=00000000000000000000000000000000 XMM01=79d44beb64ffddaea047bcad432f33a1 XMM02=ec2efd57dc4c00df000000000011da00 XMM03=9fe3f98a688fea03000000000011dad0 XMM04=d24909bb14f8e67600000000000ae988 XMM05=19e9129bd510f23500000000001342f8 XMM06=fd75ee885c3687a50000000000133160 XMM07=e042d86d42eb936e00000000001249f8 XMM08=9fe3f98a688fea03000000000011dad0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000