syzkaller login: [ 31.308082] BUG: Bad rss-counter state mm:0000000025f12106 type:MM_FILEPAGES val:33 [ 31.309244] BUG: Bad rss-counter state mm:0000000025f12106 type:MM_ANONPAGES val:22 [ 31.482321] ================================================================== [ 31.483168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.484048] Read of size 8 at addr ffff88800c4c9c20 by task sshd/222 [ 31.484780] [ 31.484992] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.485934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.486971] Call Trace: [ 31.487276] [ 31.487544] dump_stack_lvl+0x91/0xf0 [ 31.488006] print_report+0xcc/0x620 [ 31.488467] ? __virt_addr_valid+0x102/0x340 [ 31.489020] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489601] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.490177] kasan_report+0xbe/0xf0 [ 31.490625] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.491211] vma_interval_tree_remove+0xc75/0xec0 [ 31.491778] vma_prepare+0xc54/0x11a0 [ 31.492230] __split_vma+0x5af/0x950 [ 31.492685] ? __pfx___split_vma+0x10/0x10 [ 31.493189] ? find_held_lock+0x2c/0x110 [ 31.493680] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.494207] ? lock_is_held_type+0x9f/0x120 [ 31.494713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.495281] ? mtree_range_walk+0x632/0x900 [ 31.495800] ? mas_walk+0x5c7/0x7c0 [ 31.496245] do_vmi_munmap+0x1f1/0x2b0 [ 31.496716] mmap_region+0x1f9/0x2660 [ 31.497171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.497651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.498321] ? __pfx_lock_acquire+0x10/0x10 [ 31.498820] ? __pfx_mmap_region+0x10/0x10 [ 31.499316] ? security_mmap_addr+0x7d/0xa0 [ 31.499814] ? get_unmapped_area+0x1f5/0x3f0 [ 31.500331] do_mmap+0x854/0xf00 [ 31.500756] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.501223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.501811] ksys_mmap_pgoff+0x3af/0x500 [ 31.502299] do_syscall_64+0x3f/0x90 [ 31.502744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.503349] RIP: 0033:0x7f2a72b1dd82 [ 31.503773] 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 [ 31.505765] RSP: 002b:00007ffcedd35c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.506794] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a72b1dd82 [ 31.507596] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a71f57000 [ 31.508388] RBP: 00007f2a71f57000 R08: 0000000000000009 R09: 0000000000001000 [ 31.509337] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561deca25f70 [ 31.510354] R13: 00007ffcedd35c40 R14: 00007ffcedd35c70 R15: 00007ffcedd35fd0 [ 31.511245] [ 31.511529] [ 31.511742] Allocated by task 213: [ 31.512144] kasan_save_stack+0x22/0x50 [ 31.512618] kasan_set_track+0x25/0x30 [ 31.513095] __kasan_slab_alloc+0x59/0x70 [ 31.513586] kmem_cache_alloc+0x16b/0x370 [ 31.514077] vm_area_dup+0x20/0x160 [ 31.514505] __split_vma+0x170/0x950 [ 31.514943] split_vma+0xc6/0x110 [ 31.515355] mprotect_fixup+0x8d2/0xb30 [ 31.515832] do_mprotect_pkey+0x87e/0xd40 [ 31.516346] __x64_sys_mprotect+0x78/0xc0 [ 31.516866] do_syscall_64+0x3f/0x90 [ 31.517326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517976] [ 31.518188] Freed by task 203: [ 31.518564] kasan_save_stack+0x22/0x50 [ 31.519065] kasan_set_track+0x25/0x30 [ 31.519552] kasan_save_free_info+0x2b/0x50 [ 31.520077] __kasan_slab_free+0x10a/0x190 [ 31.520597] kmem_cache_free+0x10d/0x4d0 [ 31.521120] rcu_core+0x8c8/0x2860 [ 31.521549] __do_softirq+0x1b7/0x7d4 [ 31.522015] [ 31.522272] Last potentially related work creation: [ 31.522984] kasan_save_stack+0x22/0x50 [ 31.523584] __kasan_record_aux_stack+0x8e/0xa0 [ 31.524141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524772] remove_vma+0x139/0x170 [ 31.525207] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.525752] do_vmi_munmap+0x1f1/0x2b0 [ 31.526298] __vm_munmap+0x138/0x3a0 [ 31.526792] __x64_sys_munmap+0x59/0x80 [ 31.527284] do_syscall_64+0x3f/0x90 [ 31.527749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.528372] [ 31.528585] The buggy address belongs to the object at ffff88800c4c9bc8 [ 31.528585] which belongs to the cache vm_area_struct of size 168 [ 31.530034] The buggy address is located 88 bytes inside of [ 31.530034] freed 168-byte region [ffff88800c4c9bc8, ffff88800c4c9c70) [ 31.531385] [ 31.531593] The buggy address belongs to the physical page: [ 31.532235] page:000000002a2e8f9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4c9 [ 31.533335] memcg:ffff88800eb7a801 [ 31.533752] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.534393] page_type: 0xffffffff() [ 31.534849] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.535754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb7a801 [ 31.536662] page dumped because: kasan: bad access detected [ 31.537317] [ 31.537522] Memory state around the buggy address: [ 31.538091] ffff88800c4c9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.538938] ffff88800c4c9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.539758] >ffff88800c4c9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.540598] ^ [ 31.541129] ffff88800c4c9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.541968] ffff88800c4c9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.542798] ================================================================== [ 31.543857] Disabling lock debugging due to kernel taint [ 33.440939] BUG: Bad rss-counter state mm:00000000dbd8e6fb type:MM_FILEPAGES val:33 [ 33.442071] BUG: Bad rss-counter state mm:00000000dbd8e6fb type:MM_ANONPAGES val:22 [ 33.893751] BUG: Bad rss-counter state mm:00000000d51ac331 type:MM_FILEPAGES val:33 [ 33.894930] BUG: Bad rss-counter state mm:00000000d51ac331 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34080' (ECDSA) to the list of known hosts. 2023/06/19 22:31:39 fuzzer started 2023/06/19 22:31:39 dialing manager at localhost:44161 2023/06/19 22:31:39 checking machine... 2023/06/19 22:31:39 checking revisions... [ 34.552896] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:31:39 testing simple program... [ 34.603173] cgroup: Unknown subsys name 'net' [ 34.638644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:31:38 Registers: info registers vcpu 0 RAX=1ffffffff0bbf951 RBX=ffffffff85dfca8c RCX=ffffffff8180c8d9 RDX=0000000000000001 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88806ce099c0 R8 =ffffffff861375e0 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfca90 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000213 [----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 00007f3c57961900 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=00007fb6c6213650 CR3=000000000c620000 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=fd0d01cc179754f200000000000ae988 XMM05=e1615081d10558d700000000001341b8 XMM06=19e9129bd510f2350000000000133050 XMM07=fb795ef6d65770560000000000123298 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf46ef RBX=ffffffff85fa377c RCX=ffffffff8363c1b0 RDX=0000000000000000 RSI=ffffffff863b192a RDI=ffffffff85fa3768 RBP=ffffffff85fa3768 RSP=ffff888019ec79f8 R8 =ffffffff863b192a R9 =ffff888019ec7af0 R10=0000000000038001 R11=000000000008a8e5 R12=ffffffff85fa3794 R13=ffffffff85fa3768 R14=ffffffff85fa3768 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007fb6c5c5e900 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=00007fb6c62160b0 CR3=000000000eb48000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000