syzkaller login: [ 32.275751] BUG: Bad rss-counter state mm:00000000540951f5 type:MM_FILEPAGES val:33 [ 32.276337] BUG: Bad rss-counter state mm:00000000540951f5 type:MM_ANONPAGES val:22 [ 32.385761] ================================================================== [ 32.386880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.388100] Read of size 8 at addr ffff888018795310 by task sshd/219 [ 32.388764] [ 32.388933] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.389583] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.390342] Call Trace: [ 32.390585] [ 32.390801] dump_stack_lvl+0x91/0xf0 [ 32.391177] print_report+0xcc/0x620 [ 32.391562] ? __virt_addr_valid+0x102/0x340 [ 32.391985] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392452] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392921] kasan_report+0xbe/0xf0 [ 32.393283] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.393755] vma_interval_tree_remove+0xc75/0xec0 [ 32.394210] vma_prepare+0xc54/0x11a0 [ 32.394571] __split_vma+0x5af/0x950 [ 32.394929] ? __pfx___split_vma+0x10/0x10 [ 32.395329] ? find_held_lock+0x2c/0x110 [ 32.395734] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.396158] ? lock_is_held_type+0x9f/0x120 [ 32.396567] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.397031] ? mtree_range_walk+0x632/0x900 [ 32.397451] ? mas_walk+0x5c7/0x7c0 [ 32.397810] do_vmi_munmap+0x1f1/0x2b0 [ 32.398179] mmap_region+0x1f9/0x2660 [ 32.398549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.398937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.399504] ? __pfx_lock_acquire+0x10/0x10 [ 32.399914] ? __pfx_mmap_region+0x10/0x10 [ 32.400235] ? security_mmap_addr+0x7d/0xa0 [ 32.400547] ? get_unmapped_area+0x1f5/0x3f0 [ 32.400865] do_mmap+0x854/0xf00 [ 32.401114] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.401397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.401718] ksys_mmap_pgoff+0x3af/0x500 [ 32.402021] do_syscall_64+0x3f/0x90 [ 32.402299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.402671] RIP: 0033:0x7f4186389d82 [ 32.402929] 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 [ 32.404191] RSP: 002b:00007fffc0fd36f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.404735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4186389d82 [ 32.405238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41857c3000 [ 32.405739] RBP: 00007f41857c3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.406240] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555df78a1d90 [ 32.406747] R13: 00007fffc0fd3710 R14: 00007fffc0fd3740 R15: 00007fffc0fd3aa0 [ 32.407252] [ 32.407426] [ 32.407551] Allocated by task 212: [ 32.407808] kasan_save_stack+0x22/0x50 [ 32.408106] kasan_set_track+0x25/0x30 [ 32.408394] __kasan_slab_alloc+0x59/0x70 [ 32.408693] kmem_cache_alloc+0x16b/0x370 [ 32.408994] vm_area_dup+0x20/0x160 [ 32.409256] __split_vma+0x170/0x950 [ 32.409521] split_vma+0xc6/0x110 [ 32.409773] mprotect_fixup+0x8d2/0xb30 [ 32.410069] do_mprotect_pkey+0x87e/0xd40 [ 32.410373] __x64_sys_mprotect+0x78/0xc0 [ 32.410674] do_syscall_64+0x3f/0x90 [ 32.410949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.411319] [ 32.411456] Freed by task 212: [ 32.411690] kasan_save_stack+0x22/0x50 [ 32.411981] kasan_set_track+0x25/0x30 [ 32.412266] kasan_save_free_info+0x2b/0x50 [ 32.412581] __kasan_slab_free+0x10a/0x190 [ 32.412887] kmem_cache_free+0x10d/0x4d0 [ 32.413179] rcu_core+0x8c8/0x2860 [ 32.413433] __do_softirq+0x1b7/0x7d4 [ 32.413712] [ 32.413833] Last potentially related work creation: [ 32.414179] kasan_save_stack+0x22/0x50 [ 32.414479] __kasan_record_aux_stack+0x8e/0xa0 [ 32.414813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.415188] remove_vma+0x139/0x170 [ 32.415462] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.415791] do_vmi_munmap+0x1f1/0x2b0 [ 32.416072] __vm_munmap+0x138/0x3a0 [ 32.416338] __x64_sys_munmap+0x59/0x80 [ 32.416620] do_syscall_64+0x3f/0x90 [ 32.416889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.417271] [ 32.417401] The buggy address belongs to the object at ffff8880187952b8 [ 32.417401] which belongs to the cache vm_area_struct of size 168 [ 32.418272] The buggy address is located 88 bytes inside of [ 32.418272] freed 168-byte region [ffff8880187952b8, ffff888018795360) [ 32.419111] [ 32.419235] The buggy address belongs to the physical page: [ 32.419618] page:00000000a801f9cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18795 [ 32.420257] memcg:ffff8880142aa701 [ 32.420503] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.420875] page_type: 0xffffffff() [ 32.421142] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.421684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142aa701 [ 32.422210] page dumped because: kasan: bad access detected [ 32.422593] [ 32.422715] Memory state around the buggy address: [ 32.423063] ffff888018795200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.423582] ffff888018795280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.424084] >ffff888018795300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.424591] ^ [ 32.424863] ffff888018795380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.425352] ffff888018795400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.425856] ================================================================== [ 32.426402] Disabling lock debugging due to kernel taint [ 34.399946] BUG: Bad rss-counter state mm:000000002797fdb5 type:MM_FILEPAGES val:33 [ 34.401063] BUG: Bad rss-counter state mm:000000002797fdb5 type:MM_ANONPAGES val:22 [ 34.905707] BUG: Bad rss-counter state mm:00000000cd760909 type:MM_FILEPAGES val:33 [ 34.907613] BUG: Bad rss-counter state mm:00000000cd760909 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47002' (ECDSA) to the list of known hosts. 2023/06/19 16:40:28 fuzzer started 2023/06/19 16:40:29 dialing manager at localhost:44161 2023/06/19 16:40:29 checking machine... 2023/06/19 16:40:29 checking revisions... [ 35.797592] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:40:29 testing simple program... [ 35.851820] cgroup: Unknown subsys name 'net' [ 35.904988] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880103772f0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8180b1a1 RDI=ffff8880103772fc RBP=0000000000000004 RSP=ffff888010377208 R8 =0000000000000001 R9 =ffff888010377268 R10=0000000000038001 R11=0000000000020dae R12=ffff8880103772f0 R13=0000000000000000 R14=ffff88800fb5d1c0 R15=ffff88801a14a438 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007faaea79a900 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=00007faae9bc3b50 CR3=000000000d878000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=08101bbc8818a29d00000000000ae988 XMM05=be2dc214cea9d50c0000000000134c40 XMM06=dfcdbad4f1609c370000000000133da8 XMM07=fb795ef6d657705600000000001242c0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800cb9f2f0 RCX=ffff88800cb9f2f8 RDX=1ffff11001973e4b RSI=ffff88800cb9f228 RDI=ffff88800cb9f258 RBP=dffffc0000000000 RSP=ffff88800cb9f1e0 R8 =0000000000000001 R9 =ffff88800cb9f298 R10=0000000000038001 R11=0000000000006097 R12=ffffed1001973e4d R13=ffffed1001973e4c R14=ffff88800cb9f2a0 R15=ffff88800cb9f258 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f75ab34c900 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=00007fff74d32000 CR3=000000001be92000 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