syzkaller login: [ 31.725834] BUG: Bad rss-counter state mm:0000000022e87a1c type:MM_FILEPAGES val:33 [ 31.727233] BUG: Bad rss-counter state mm:0000000022e87a1c type:MM_ANONPAGES val:22 [ 31.874983] ================================================================== [ 31.875947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.876885] Read of size 8 at addr ffff88800cc10a50 by task sshd/221 [ 31.877652] [ 31.877867] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.878845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.879832] Call Trace: [ 31.880154] [ 31.880457] dump_stack_lvl+0x91/0xf0 [ 31.880951] print_report+0xcc/0x620 [ 31.881436] ? __virt_addr_valid+0x102/0x340 [ 31.881991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.882602] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.883206] kasan_report+0xbe/0xf0 [ 31.883692] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.884326] vma_interval_tree_remove+0xc75/0xec0 [ 31.884930] vma_prepare+0xc54/0x11a0 [ 31.885408] __split_vma+0x5af/0x950 [ 31.885874] ? __pfx___split_vma+0x10/0x10 [ 31.886396] ? find_held_lock+0x2c/0x110 [ 31.886907] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.887469] ? lock_is_held_type+0x9f/0x120 [ 31.888007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.888605] ? mtree_range_walk+0x632/0x900 [ 31.889152] ? mas_walk+0x5c7/0x7c0 [ 31.889625] do_vmi_munmap+0x1f1/0x2b0 [ 31.890108] mmap_region+0x1f9/0x2660 [ 31.890582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.891090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.891813] ? __pfx_lock_acquire+0x10/0x10 [ 31.892344] ? __pfx_mmap_region+0x10/0x10 [ 31.892864] ? security_mmap_addr+0x7d/0xa0 [ 31.893393] ? get_unmapped_area+0x1f5/0x3f0 [ 31.893937] do_mmap+0x854/0xf00 [ 31.894380] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.894866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.895433] ksys_mmap_pgoff+0x3af/0x500 [ 31.895939] do_syscall_64+0x3f/0x90 [ 31.896421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.897067] RIP: 0033:0x7f81d7f68d82 [ 31.897518] 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 [ 31.899614] RSP: 002b:00007ffd1d30cba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.900523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81d7f68d82 [ 31.901352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81d73a2000 [ 31.902192] RBP: 00007f81d73a2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.903029] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561153db4ec0 [ 31.903886] R13: 00007ffd1d30cbc0 R14: 00007ffd1d30cbf0 R15: 00007ffd1d30cf50 [ 31.904733] [ 31.905022] [ 31.905237] Allocated by task 214: [ 31.905662] kasan_save_stack+0x22/0x50 [ 31.906157] kasan_set_track+0x25/0x30 [ 31.906651] __kasan_slab_alloc+0x59/0x70 [ 31.907166] kmem_cache_alloc+0x16b/0x370 [ 31.907684] vm_area_dup+0x20/0x160 [ 31.908135] __split_vma+0x170/0x950 [ 31.908596] split_vma+0xc6/0x110 [ 31.909036] mprotect_fixup+0x8d2/0xb30 [ 31.909532] do_mprotect_pkey+0x87e/0xd40 [ 31.910049] __x64_sys_mprotect+0x78/0xc0 [ 31.910561] do_syscall_64+0x3f/0x90 [ 31.911033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.911673] [ 31.911886] Freed by task 214: [ 31.912273] kasan_save_stack+0x22/0x50 [ 31.912767] kasan_set_track+0x25/0x30 [ 31.913257] kasan_save_free_info+0x2b/0x50 [ 31.913780] __kasan_slab_free+0x10a/0x190 [ 31.914306] kmem_cache_free+0x10d/0x4d0 [ 31.914805] rcu_core+0x8c8/0x2860 [ 31.915241] __do_softirq+0x1b7/0x7d4 [ 31.915733] [ 31.915949] Last potentially related work creation: [ 31.916528] kasan_save_stack+0x22/0x50 [ 31.917031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.917604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.918241] remove_vma+0x139/0x170 [ 31.918688] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.919244] do_vmi_munmap+0x1f1/0x2b0 [ 31.919731] __vm_munmap+0x138/0x3a0 [ 31.920196] __x64_sys_munmap+0x59/0x80 [ 31.920688] do_syscall_64+0x3f/0x90 [ 31.921156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.921791] [ 31.922004] The buggy address belongs to the object at ffff88800cc109f8 [ 31.922004] which belongs to the cache vm_area_struct of size 168 [ 31.923473] The buggy address is located 88 bytes inside of [ 31.923473] freed 168-byte region [ffff88800cc109f8, ffff88800cc10aa0) [ 31.924851] [ 31.925068] The buggy address belongs to the physical page: [ 31.925726] page:00000000e2b37220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc10 [ 31.926799] memcg:ffff888016a70801 [ 31.927225] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.927872] page_type: 0xffffffff() [ 31.928317] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.929220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a70801 [ 31.930115] page dumped because: kasan: bad access detected [ 31.930769] [ 31.930982] Memory state around the buggy address: [ 31.931573] ffff88800cc10900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.932423] ffff88800cc10980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.933273] >ffff88800cc10a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.934135] ^ [ 31.934831] ffff88800cc10a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.935712] ffff88800cc10b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.936561] ================================================================== [ 31.937844] Disabling lock debugging due to kernel taint [ 34.288096] BUG: Bad rss-counter state mm:0000000000645d68 type:MM_FILEPAGES val:33 [ 34.289120] BUG: Bad rss-counter state mm:0000000000645d68 type:MM_ANONPAGES val:22 [ 34.759574] BUG: Bad rss-counter state mm:000000008399d1e5 type:MM_FILEPAGES val:33 [ 34.760509] BUG: Bad rss-counter state mm:000000008399d1e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46556' (ECDSA) to the list of known hosts. 2023/06/20 05:23:19 fuzzer started 2023/06/20 05:23:19 dialing manager at localhost:44161 2023/06/20 05:23:19 checking machine... 2023/06/20 05:23:19 checking revisions... [ 35.473950] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:23:19 testing simple program... [ 35.519210] cgroup: Unknown subsys name 'net' [ 35.558553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc8b1288e8 CR3=000000000f226000 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=33323a3530203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732038313a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861c7682 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861c7686 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000038dc4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800d9ffab0 R15=ffff88806cf09a98 RIP=ffffffff81130bd6 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 00007fa8e5f0a900 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=00007fa8e64c20b0 CR3=0000000015f74000 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=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