syzkaller login: [ 32.347912] BUG: Bad rss-counter state mm:000000007683152c type:MM_FILEPAGES val:33 [ 32.349256] BUG: Bad rss-counter state mm:000000007683152c type:MM_ANONPAGES val:22 [ 32.391026] ================================================================== [ 32.391973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.393020] Read of size 8 at addr ffff8880145b9968 by task sshd/221 [ 32.393792] [ 32.394016] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.394928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.395921] Call Trace: [ 32.396243] [ 32.396542] dump_stack_lvl+0x91/0xf0 [ 32.397050] print_report+0xcc/0x620 [ 32.397560] ? __virt_addr_valid+0x102/0x340 [ 32.398123] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.398783] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.399406] kasan_report+0xbe/0xf0 [ 32.399883] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.400500] vma_interval_tree_remove+0xc75/0xec0 [ 32.401110] vma_prepare+0xc54/0x11a0 [ 32.401593] __split_vma+0x5af/0x950 [ 32.402064] ? __pfx___split_vma+0x10/0x10 [ 32.402597] ? find_held_lock+0x2c/0x110 [ 32.403126] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.403690] ? lock_is_held_type+0x9f/0x120 [ 32.404232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.404839] ? mtree_range_walk+0x632/0x900 [ 32.405391] ? mas_walk+0x5c7/0x7c0 [ 32.405864] do_vmi_munmap+0x1f1/0x2b0 [ 32.406355] mmap_region+0x1f9/0x2660 [ 32.406842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.407355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.408061] ? __pfx_lock_acquire+0x10/0x10 [ 32.408591] ? __pfx_mmap_region+0x10/0x10 [ 32.409139] ? security_mmap_addr+0x7d/0xa0 [ 32.409675] ? get_unmapped_area+0x1f5/0x3f0 [ 32.410235] do_mmap+0x854/0xf00 [ 32.410696] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.411196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.411766] ksys_mmap_pgoff+0x3af/0x500 [ 32.412277] do_syscall_64+0x3f/0x90 [ 32.412762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.413433] RIP: 0033:0x7f44cae49d82 [ 32.413897] 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 [ 32.416056] RSP: 002b:00007fffd9c8e2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.416981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44cae49d82 [ 32.417856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44ca283000 [ 32.418719] RBP: 00007f44ca283000 R08: 0000000000000009 R09: 0000000000001000 [ 32.419570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb3470dec0 [ 32.420424] R13: 00007fffd9c8e2f0 R14: 00007fffd9c8e320 R15: 00007fffd9c8e680 [ 32.421284] [ 32.421574] [ 32.421789] Allocated by task 214: [ 32.422217] kasan_save_stack+0x22/0x50 [ 32.422730] kasan_set_track+0x25/0x30 [ 32.423229] __kasan_slab_alloc+0x59/0x70 [ 32.423751] kmem_cache_alloc+0x16b/0x370 [ 32.424266] vm_area_dup+0x20/0x160 [ 32.424719] __split_vma+0x170/0x950 [ 32.425185] split_vma+0xc6/0x110 [ 32.425628] mprotect_fixup+0x8d2/0xb30 [ 32.426145] do_mprotect_pkey+0x87e/0xd40 [ 32.426685] __x64_sys_mprotect+0x78/0xc0 [ 32.427211] do_syscall_64+0x3f/0x90 [ 32.427688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.428335] [ 32.428553] Freed by task 214: [ 32.428948] kasan_save_stack+0x22/0x50 [ 32.429453] kasan_set_track+0x25/0x30 [ 32.429948] kasan_save_free_info+0x2b/0x50 [ 32.430479] __kasan_slab_free+0x10a/0x190 [ 32.431021] kmem_cache_free+0x10d/0x4d0 [ 32.431527] rcu_core+0x8c8/0x2860 [ 32.431972] __do_softirq+0x1b7/0x7d4 [ 32.432452] [ 32.432669] Last potentially related work creation: [ 32.433253] kasan_save_stack+0x22/0x50 [ 32.433755] __kasan_record_aux_stack+0x8e/0xa0 [ 32.434339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.434995] remove_vma+0x139/0x170 [ 32.435443] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.436012] do_vmi_munmap+0x1f1/0x2b0 [ 32.436502] __vm_munmap+0x138/0x3a0 [ 32.436970] __x64_sys_munmap+0x59/0x80 [ 32.437465] do_syscall_64+0x3f/0x90 [ 32.437942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.438602] [ 32.438816] The buggy address belongs to the object at ffff8880145b9910 [ 32.438816] which belongs to the cache vm_area_struct of size 168 [ 32.440282] The buggy address is located 88 bytes inside of [ 32.440282] freed 168-byte region [ffff8880145b9910, ffff8880145b99b8) [ 32.441685] [ 32.441910] The buggy address belongs to the physical page: [ 32.442572] page:000000004ea81e3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145b9 [ 32.443662] memcg:ffff888019f83101 [ 32.444098] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.444743] page_type: 0xffffffff() [ 32.445191] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.446113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f83101 [ 32.447032] page dumped because: kasan: bad access detected [ 32.447684] [ 32.447905] Memory state around the buggy address: [ 32.448483] ffff8880145b9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.449337] ffff8880145b9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.450198] >ffff8880145b9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.451067] ^ [ 32.451858] ffff8880145b9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.452707] ffff8880145b9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.453553] ================================================================== [ 32.454806] Disabling lock debugging due to kernel taint [ 34.431887] BUG: Bad rss-counter state mm:00000000a0061aad type:MM_FILEPAGES val:33 [ 34.433083] BUG: Bad rss-counter state mm:00000000a0061aad type:MM_ANONPAGES val:22 [ 34.921378] BUG: Bad rss-counter state mm:000000001808b83c type:MM_FILEPAGES val:33 [ 34.922405] BUG: Bad rss-counter state mm:000000001808b83c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21491' (ECDSA) to the list of known hosts. 2023/06/20 00:21:40 fuzzer started 2023/06/20 00:21:40 dialing manager at localhost:44161 2023/06/20 00:21:40 checking machine... 2023/06/20 00:21:40 checking revisions... [ 35.654355] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:21:40 testing simple program... [ 35.710423] cgroup: Unknown subsys name 'net' [ 35.751466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000008000 RCX=ffffffff818a86a2 RDX=ffff88801685b680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000141 RSP=ffff888016867b08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888016867c48 R13=dffffc0000000000 R14=0000000000000000 R15=ffff888016867df0 RIP=ffffffff814c07e0 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 00007f379fd62900 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=00007f37a031a0b0 CR3=000000000f17c000 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=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=00007f03a5ed55f0 CR3=000000000c99e000 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=5e4172e09b2ef2887243ab213a5f2403 XMM02=000000000011e4c0eff9b2d0a8fce9cb XMM03=000000000011e5902c67c8bc2e329bc3 XMM04=90d73be922e5203000000000000ae988 XMM05=e4cb8bb95a7664b60000000000134d40 XMM06=43f9d2deeb4bcc8f0000000000133ba8 XMM07=e042d86d42eb936e00000000001254b8 XMM08=2946d321f199ab6b000000000011e590 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000