syzkaller login: [ 33.618294] BUG: Bad rss-counter state mm:00000000340716b4 type:MM_FILEPAGES val:33 [ 33.619284] BUG: Bad rss-counter state mm:00000000340716b4 type:MM_ANONPAGES val:22 [ 33.785000] ================================================================== [ 33.785925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.786852] Read of size 8 at addr ffff88800dc09ed8 by task sshd/222 [ 33.787608] [ 33.787824] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.788815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.789788] Call Trace: [ 33.790102] [ 33.790530] dump_stack_lvl+0x91/0xf0 [ 33.791130] print_report+0xcc/0x620 [ 33.791714] ? __virt_addr_valid+0x102/0x340 [ 33.792382] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.793127] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.793942] kasan_report+0xbe/0xf0 [ 33.794520] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.795266] vma_interval_tree_remove+0xc75/0xec0 [ 33.795988] vma_prepare+0xc54/0x11a0 [ 33.796574] __split_vma+0x5af/0x950 [ 33.797149] ? __pfx___split_vma+0x10/0x10 [ 33.797807] ? find_held_lock+0x2c/0x110 [ 33.798439] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.799126] ? lock_is_held_type+0x9f/0x120 [ 33.799780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.800524] ? mtree_range_walk+0x632/0x900 [ 33.801204] ? mas_walk+0x5c7/0x7c0 [ 33.801815] do_vmi_munmap+0x1f1/0x2b0 [ 33.802341] mmap_region+0x1f9/0x2660 [ 33.802822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.803333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.804052] ? __pfx_lock_acquire+0x10/0x10 [ 33.804578] ? __pfx_mmap_region+0x10/0x10 [ 33.805099] ? security_mmap_addr+0x7d/0xa0 [ 33.805639] ? get_unmapped_area+0x1f5/0x3f0 [ 33.806187] do_mmap+0x854/0xf00 [ 33.806619] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.807119] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.807677] ksys_mmap_pgoff+0x3af/0x500 [ 33.808202] do_syscall_64+0x3f/0x90 [ 33.808674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.809332] RIP: 0033:0x7fbe9b42bd82 [ 33.809784] 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 [ 33.812041] RSP: 002b:00007ffcf4e95ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.812931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe9b42bd82 [ 33.813772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe9a865000 [ 33.814613] RBP: 00007fbe9a865000 R08: 0000000000000009 R09: 0000000000001000 [ 33.815454] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0c3f84d90 [ 33.816295] R13: 00007ffcf4e95f10 R14: 00007ffcf4e95f40 R15: 00007ffcf4e962a0 [ 33.817147] [ 33.817452] [ 33.817664] Allocated by task 215: [ 33.818091] kasan_save_stack+0x22/0x50 [ 33.818592] kasan_set_track+0x25/0x30 [ 33.819084] __kasan_slab_alloc+0x59/0x70 [ 33.819599] kmem_cache_alloc+0x16b/0x370 [ 33.820121] vm_area_dup+0x20/0x160 [ 33.820575] __split_vma+0x170/0x950 [ 33.821037] split_vma+0xc6/0x110 [ 33.821504] mprotect_fixup+0x8d2/0xb30 [ 33.822003] do_mprotect_pkey+0x87e/0xd40 [ 33.822516] __x64_sys_mprotect+0x78/0xc0 [ 33.823043] do_syscall_64+0x3f/0x90 [ 33.823507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.824143] [ 33.824361] Freed by task 215: [ 33.824747] kasan_save_stack+0x22/0x50 [ 33.825255] kasan_set_track+0x25/0x30 [ 33.825758] kasan_save_free_info+0x2b/0x50 [ 33.826283] __kasan_slab_free+0x10a/0x190 [ 33.826810] kmem_cache_free+0x10d/0x4d0 [ 33.827315] rcu_core+0x8c8/0x2860 [ 33.827751] __do_softirq+0x1b7/0x7d4 [ 33.828233] [ 33.828446] Last potentially related work creation: [ 33.829030] kasan_save_stack+0x22/0x50 [ 33.829534] __kasan_record_aux_stack+0x8e/0xa0 [ 33.830107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.830747] remove_vma+0x139/0x170 [ 33.831192] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.831748] do_vmi_munmap+0x1f1/0x2b0 [ 33.832231] __vm_munmap+0x138/0x3a0 [ 33.832698] __x64_sys_munmap+0x59/0x80 [ 33.833197] do_syscall_64+0x3f/0x90 [ 33.833696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.834335] [ 33.834553] The buggy address belongs to the object at ffff88800dc09e80 [ 33.834553] which belongs to the cache vm_area_struct of size 168 [ 33.836002] The buggy address is located 88 bytes inside of [ 33.836002] freed 168-byte region [ffff88800dc09e80, ffff88800dc09f28) [ 33.837400] [ 33.837614] The buggy address belongs to the physical page: [ 33.838271] page:00000000a64b2931 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc09 [ 33.839355] memcg:ffff888016616401 [ 33.839778] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.840419] page_type: 0xffffffff() [ 33.840866] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.841798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016616401 [ 33.842704] page dumped because: kasan: bad access detected [ 33.843356] [ 33.843571] Memory state around the buggy address: [ 33.844144] ffff88800dc09d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.844996] ffff88800dc09e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.845855] >ffff88800dc09e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.846701] ^ [ 33.847427] ffff88800dc09f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.848280] ffff88800dc09f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.849122] ================================================================== [ 33.850098] Disabling lock debugging due to kernel taint [ 36.414507] BUG: Bad rss-counter state mm:0000000075709a73 type:MM_FILEPAGES val:33 [ 36.415654] BUG: Bad rss-counter state mm:0000000075709a73 type:MM_ANONPAGES val:22 [ 36.891489] BUG: Bad rss-counter state mm:000000007d185d57 type:MM_FILEPAGES val:33 [ 36.892462] BUG: Bad rss-counter state mm:000000007d185d57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4362' (ECDSA) to the list of known hosts. 2023/06/19 12:20:29 fuzzer started 2023/06/19 12:20:29 dialing manager at localhost:44161 2023/06/19 12:20:29 checking machine... 2023/06/19 12:20:29 checking revisions... [ 37.652744] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:20:29 testing simple program... [ 37.707741] cgroup: Unknown subsys name 'net' [ 37.757468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:20:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=1ffff11002b8de83 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015c6f428 RSP=ffff888015c6f360 R8 =ffffffff8613dd34 R9 =ffff888015c6f410 R10=0000000000038001 R11=0000000000021ee6 R12=ffff888015c6f430 R13=ffff888015c6f418 R14=0000000000000005 R15=ffff888015c6f3d0 RIP=ffffffff81130b54 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 00007fca1289c900 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=00007fca11c9d700 CR3=000000000f056000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aed72907ab8d1fde00000000000ae988 XMM05=04d2cfa4253caed90000000000136250 XMM06=59d5b690e0af863b00000000001350e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000014 RDI=ffff8880194bf210 RBP=ffff88800844f780 RSP=ffff8880194bf1a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880194bf210 R15=0000000000092cc0 RIP=ffffffff813ad5a0 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 00007fa086006900 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=00007ffeac87a000 CR3=000000001ceee000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000