syzkaller login: [ 31.115492] BUG: Bad rss-counter state mm:00000000a462ec4d type:MM_FILEPAGES val:33 [ 31.116269] BUG: Bad rss-counter state mm:00000000a462ec4d type:MM_ANONPAGES val:22 [ 31.248279] ================================================================== [ 31.249344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250494] Read of size 8 at addr ffff88800ddfded8 by task sshd/220 [ 31.251213] [ 31.251393] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.252917] Call Trace: [ 31.253181] [ 31.253414] dump_stack_lvl+0x91/0xf0 [ 31.253817] print_report+0xcc/0x620 [ 31.254226] ? __virt_addr_valid+0x102/0x340 [ 31.254688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255713] kasan_report+0xbe/0xf0 [ 31.256102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256611] vma_interval_tree_remove+0xc75/0xec0 [ 31.257101] vma_prepare+0xc54/0x11a0 [ 31.257494] __split_vma+0x5af/0x950 [ 31.257880] ? __pfx___split_vma+0x10/0x10 [ 31.258330] ? find_held_lock+0x2c/0x110 [ 31.258758] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.259230] ? lock_is_held_type+0x9f/0x120 [ 31.259673] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.260165] ? mtree_range_walk+0x632/0x900 [ 31.260630] ? mas_walk+0x5c7/0x7c0 [ 31.261019] do_vmi_munmap+0x1f1/0x2b0 [ 31.261415] mmap_region+0x1f9/0x2660 [ 31.261834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.262259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.262878] ? __pfx_lock_acquire+0x10/0x10 [ 31.263316] ? __pfx_mmap_region+0x10/0x10 [ 31.263751] ? security_mmap_addr+0x7d/0xa0 [ 31.264187] ? get_unmapped_area+0x1f5/0x3f0 [ 31.264639] do_mmap+0x854/0xf00 [ 31.264997] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265868] ksys_mmap_pgoff+0x3af/0x500 [ 31.266274] do_syscall_64+0x3f/0x90 [ 31.266678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267216] RIP: 0033:0x7f981becad82 [ 31.267587] 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 [ 31.269338] RSP: 002b:00007ffd9a9af5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f981becad82 [ 31.270771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f981b304000 [ 31.271488] RBP: 00007f981b304000 R08: 0000000000000009 R09: 0000000000001000 [ 31.272187] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ea83fb980 [ 31.272881] R13: 00007ffd9a9af5c0 R14: 00007ffd9a9af5f0 R15: 00007ffd9a9af950 [ 31.273587] [ 31.273833] [ 31.274008] Allocated by task 213: [ 31.274378] kasan_save_stack+0x22/0x50 [ 31.274785] kasan_set_track+0x25/0x30 [ 31.275182] __kasan_slab_alloc+0x59/0x70 [ 31.275604] kmem_cache_alloc+0x16b/0x370 [ 31.276038] vm_area_dup+0x20/0x160 [ 31.276408] __split_vma+0x170/0x950 [ 31.276792] split_vma+0xc6/0x110 [ 31.277150] mprotect_fixup+0x8d2/0xb30 [ 31.277555] do_mprotect_pkey+0x87e/0xd40 [ 31.277993] __x64_sys_mprotect+0x78/0xc0 [ 31.278422] do_syscall_64+0x3f/0x90 [ 31.278816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279349] [ 31.279524] Freed by task 209: [ 31.279854] kasan_save_stack+0x22/0x50 [ 31.280275] kasan_set_track+0x25/0x30 [ 31.280679] kasan_save_free_info+0x2b/0x50 [ 31.281110] __kasan_slab_free+0x10a/0x190 [ 31.281552] kmem_cache_free+0x10d/0x4d0 [ 31.281976] rcu_core+0x8c8/0x2860 [ 31.282356] __do_softirq+0x1b7/0x7d4 [ 31.282750] [ 31.282924] Last potentially related work creation: [ 31.283409] kasan_save_stack+0x22/0x50 [ 31.283826] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284840] remove_vma+0x139/0x170 [ 31.285206] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285678] do_vmi_munmap+0x1f1/0x2b0 [ 31.286078] __vm_munmap+0x138/0x3a0 [ 31.286468] __x64_sys_munmap+0x59/0x80 [ 31.286897] do_syscall_64+0x3f/0x90 [ 31.287283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287810] [ 31.287984] Second to last potentially related work creation: [ 31.288552] kasan_save_stack+0x22/0x50 [ 31.288965] __kasan_record_aux_stack+0x8e/0xa0 [ 31.289436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.289955] remove_vma+0x139/0x170 [ 31.290340] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.290791] do_vmi_munmap+0x1f1/0x2b0 [ 31.291190] mmap_region+0x1f9/0x2660 [ 31.291585] do_mmap+0x854/0xf00 [ 31.291952] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292352] ksys_mmap_pgoff+0x3af/0x500 [ 31.292763] do_syscall_64+0x3f/0x90 [ 31.293155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293687] [ 31.293871] The buggy address belongs to the object at ffff88800ddfde80 [ 31.293871] which belongs to the cache vm_area_struct of size 168 [ 31.295108] The buggy address is located 88 bytes inside of [ 31.295108] freed 168-byte region [ffff88800ddfde80, ffff88800ddfdf28) [ 31.296280] [ 31.296462] The buggy address belongs to the physical page: [ 31.297014] page:00000000c4bb4b48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddfd [ 31.297921] memcg:ffff88800f0a1801 [ 31.298272] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298872] page_type: 0xffffffff() [ 31.299247] raw: 0100000000000200 ffff8880087a0c80 ffffea000037e3c0 dead000000000007 [ 31.300000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0a1801 [ 31.300760] page dumped because: kasan: bad access detected [ 31.301315] [ 31.301498] Memory state around the buggy address: [ 31.301977] ffff88800ddfdd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.302691] ffff88800ddfde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.303407] >ffff88800ddfde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304122] ^ [ 31.304721] ffff88800ddfdf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.305427] ffff88800ddfdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.306144] ================================================================== [ 31.307029] Disabling lock debugging due to kernel taint [ 33.277865] BUG: Bad rss-counter state mm:00000000f2483334 type:MM_FILEPAGES val:33 [ 33.279025] BUG: Bad rss-counter state mm:00000000f2483334 type:MM_ANONPAGES val:22 [ 33.845615] BUG: Bad rss-counter state mm:00000000acdbfa8c type:MM_FILEPAGES val:33 [ 33.846794] BUG: Bad rss-counter state mm:00000000acdbfa8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63052' (ECDSA) to the list of known hosts. 2023/06/21 10:28:40 fuzzer started 2023/06/21 10:28:40 dialing manager at localhost:36067 2023/06/21 10:28:40 checking machine... 2023/06/21 10:28:40 checking revisions... [ 34.510141] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:28:41 testing simple program... [ 34.568861] cgroup: Unknown subsys name 'net' [ 34.624489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:40 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000005c45c273 RCX=ffff88806c6e1398 RDX=000000000000000f RSI=0000000000000003 RDI=0000000028143439 RBP=ffff888013a5a000 RSP=ffff888016eaf9c8 R8 =000000001e2892ce R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016eafa30 R15=000000000000000f RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007faa804f9900 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=00007faa80aae650 CR3=000000001bc3a000 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff8617f8cc RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015c47620 RSP=ffff888015c47558 R8 =ffffffff8617f8d0 R9 =ffff888015c47608 R10=0000000000038001 R11=000000000002c9f6 R12=ffff888015c47628 R13=ffff888015c47610 R14=0000000000000015 R15=ffff888015c475c8 RIP=ffffffff81130b17 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 00007f0717720700 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=00007f2e4f843110 CR3=000000000e2a2000 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=2030343a38323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000