syzkaller login: [ 31.075939] BUG: Bad rss-counter state mm:000000000d19ad68 type:MM_FILEPAGES val:33 [ 31.077039] BUG: Bad rss-counter state mm:000000000d19ad68 type:MM_ANONPAGES val:22 [ 31.249340] ================================================================== [ 31.250425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.251663] Read of size 8 at addr ffff88801a047df0 by task sshd/220 [ 31.252538] [ 31.252754] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.253635] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.254607] Call Trace: [ 31.254928] <TASK> [ 31.255220] dump_stack_lvl+0x91/0xf0 [ 31.255710] print_report+0xcc/0x620 [ 31.256194] ? __virt_addr_valid+0x102/0x340 [ 31.256758] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257383] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257996] kasan_report+0xbe/0xf0 [ 31.258473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259087] vma_interval_tree_remove+0xc75/0xec0 [ 31.259709] vma_prepare+0xc54/0x11a0 [ 31.260187] __split_vma+0x5af/0x950 [ 31.260657] ? __pfx___split_vma+0x10/0x10 [ 31.261180] ? find_held_lock+0x2c/0x110 [ 31.261706] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262268] ? lock_is_held_type+0x9f/0x120 [ 31.262808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.263434] ? mtree_range_walk+0x632/0x900 [ 31.263986] ? mas_walk+0x5c7/0x7c0 [ 31.264469] do_vmi_munmap+0x1f1/0x2b0 [ 31.264960] mmap_region+0x1f9/0x2660 [ 31.265450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266669] ? __pfx_lock_acquire+0x10/0x10 [ 31.267209] ? __pfx_mmap_region+0x10/0x10 [ 31.267740] ? security_mmap_addr+0x7d/0xa0 [ 31.268268] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268816] do_mmap+0x854/0xf00 [ 31.269256] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270308] ksys_mmap_pgoff+0x3af/0x500 [ 31.270814] do_syscall_64+0x3f/0x90 [ 31.271297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271940] RIP: 0033:0x7f1ce0f67d82 [ 31.272398] 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 [ 31.274515] RSP: 002b:00007fffdc241ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ce0f67d82 [ 31.276306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ce03a1000 [ 31.277161] RBP: 00007f1ce03a1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.277998] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f6955ec0 [ 31.278843] R13: 00007fffdc241b00 R14: 00007fffdc241b30 R15: 00007fffdc241e90 [ 31.279712] </TASK> [ 31.280001] [ 31.280216] Allocated by task 213: [ 31.280766] kasan_save_stack+0x22/0x50 [ 31.281255] kasan_set_track+0x25/0x30 [ 31.281732] __kasan_slab_alloc+0x59/0x70 [ 31.282239] kmem_cache_alloc+0x16b/0x370 [ 31.282740] vm_area_dup+0x20/0x160 [ 31.283184] __split_vma+0x170/0x950 [ 31.283646] split_vma+0xc6/0x110 [ 31.284075] mprotect_fixup+0x8d2/0xb30 [ 31.284567] do_mprotect_pkey+0x87e/0xd40 [ 31.285075] __x64_sys_mprotect+0x78/0xc0 [ 31.285579] do_syscall_64+0x3f/0x90 [ 31.286041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286675] [ 31.286889] Freed by task 213: [ 31.287287] kasan_save_stack+0x22/0x50 [ 31.287776] kasan_set_track+0x25/0x30 [ 31.288255] kasan_save_free_info+0x2b/0x50 [ 31.288769] __kasan_slab_free+0x10a/0x190 [ 31.289290] kmem_cache_free+0x10d/0x4d0 [ 31.289781] rcu_core+0x8c8/0x2860 [ 31.290219] __do_softirq+0x1b7/0x7d4 [ 31.290681] [ 31.290892] Last potentially related work creation: [ 31.291470] kasan_save_stack+0x22/0x50 [ 31.291956] __kasan_record_aux_stack+0x8e/0xa0 [ 31.292520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.293146] remove_vma+0x139/0x170 [ 31.293581] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.294125] do_vmi_munmap+0x1f1/0x2b0 [ 31.294598] __vm_munmap+0x138/0x3a0 [ 31.295049] __x64_sys_munmap+0x59/0x80 [ 31.295537] do_syscall_64+0x3f/0x90 [ 31.296006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296631] [ 31.296840] The buggy address belongs to the object at ffff88801a047d98 [ 31.296840] which belongs to the cache vm_area_struct of size 168 [ 31.298255] The buggy address is located 88 bytes inside of [ 31.298255] freed 168-byte region [ffff88801a047d98, ffff88801a047e40) [ 31.299644] [ 31.299853] The buggy address belongs to the physical page: [ 31.300499] page:00000000428ea433 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a047 [ 31.301562] memcg:ffff88800e358201 [ 31.301976] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.302601] page_type: 0xffffffff() [ 31.303036] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.303939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e358201 [ 31.304815] page dumped because: kasan: bad access detected [ 31.305454] [ 31.305664] Memory state around the buggy address: [ 31.306225] ffff88801a047c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.307053] ffff88801a047d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.307890] >ffff88801a047d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.308712] ^ [ 31.309495] ffff88801a047e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.310324] ffff88801a047e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.311157] ================================================================== [ 31.312472] Disabling lock debugging due to kernel taint [ 33.109529] BUG: Bad rss-counter state mm:0000000000bec86d type:MM_FILEPAGES val:33 [ 33.110408] BUG: Bad rss-counter state mm:0000000000bec86d type:MM_ANONPAGES val:22 [ 33.504581] BUG: Bad rss-counter state mm:00000000e90d904c type:MM_FILEPAGES val:33 [ 33.505368] BUG: Bad rss-counter state mm:00000000e90d904c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32106' (ECDSA) to the list of known hosts. 2023/06/21 00:40:42 fuzzer started 2023/06/21 00:40:42 dialing manager at localhost:36067 2023/06/21 00:40:42 checking machine... 2023/06/21 00:40:42 checking revisions... [ 34.138049] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:40:42 testing simple program... [ 34.183088] cgroup: Unknown subsys name 'net' [ 34.219891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ee92000 RCX=0000000000000001 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed1001dd2580 RBP=0000000000001000 RSP=ffff888019da77c8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffed1001dd2400 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea00003ba4b4 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff84513403 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 00007fa1332e4900 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=00007ffd2c2bb000 CR3=000000000dea6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff5f8acee40 CR3=0000000015cde000 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=2031343a30343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000