syzkaller login: [ 38.042434] BUG: Bad rss-counter state mm:000000008c5f4ed2 type:MM_FILEPAGES val:33 [ 38.043199] BUG: Bad rss-counter state mm:000000008c5f4ed2 type:MM_ANONPAGES val:22 [ 38.184921] ================================================================== [ 38.185910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.186951] Read of size 8 at addr ffff88800e12ab38 by task sshd/222 [ 38.187793] [ 38.188180] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.189197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.190275] Call Trace: [ 38.190666] [ 38.190980] dump_stack_lvl+0x91/0xf0 [ 38.191379] print_report+0xcc/0x620 [ 38.191780] ? __virt_addr_valid+0x102/0x340 [ 38.192177] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.192639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.193086] kasan_report+0xbe/0xf0 [ 38.193476] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.193927] vma_interval_tree_remove+0xc75/0xec0 [ 38.194391] vma_prepare+0xc54/0x11a0 [ 38.194746] __split_vma+0x5af/0x950 [ 38.195076] ? __pfx___split_vma+0x10/0x10 [ 38.195462] ? find_held_lock+0x2c/0x110 [ 38.195848] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.196261] ? lock_is_held_type+0x9f/0x120 [ 38.196649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.197100] ? mtree_range_walk+0x632/0x900 [ 38.197549] ? mas_walk+0x5c7/0x7c0 [ 38.197888] do_vmi_munmap+0x1f1/0x2b0 [ 38.198270] mmap_region+0x1f9/0x2660 [ 38.198663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.199035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.199562] ? __pfx_lock_acquire+0x10/0x10 [ 38.199942] ? __pfx_mmap_region+0x10/0x10 [ 38.200322] ? security_mmap_addr+0x7d/0xa0 [ 38.200717] ? get_unmapped_area+0x1f5/0x3f0 [ 38.201115] do_mmap+0x854/0xf00 [ 38.201469] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.201834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.202256] ksys_mmap_pgoff+0x3af/0x500 [ 38.202631] do_syscall_64+0x3f/0x90 [ 38.202967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.203428] RIP: 0033:0x7fe491a44d82 [ 38.203759] 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 [ 38.205328] RSP: 002b:00007ffef7be12b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.205995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe491a44d82 [ 38.206639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe490e7e000 [ 38.207273] RBP: 00007fe490e7e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.207890] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4bb07aec0 [ 38.208509] R13: 00007ffef7be12d0 R14: 00007ffef7be1300 R15: 00007ffef7be1660 [ 38.209136] [ 38.209344] [ 38.209501] Allocated by task 213: [ 38.209817] kasan_save_stack+0x22/0x50 [ 38.210181] kasan_set_track+0x25/0x30 [ 38.210613] __kasan_slab_alloc+0x59/0x70 [ 38.210986] kmem_cache_alloc+0x16b/0x370 [ 38.211381] vm_area_dup+0x20/0x160 [ 38.211705] __split_vma+0x170/0x950 [ 38.212038] split_vma+0xc6/0x110 [ 38.212369] mprotect_fixup+0x8d2/0xb30 [ 38.212735] do_mprotect_pkey+0x87e/0xd40 [ 38.213108] __x64_sys_mprotect+0x78/0xc0 [ 38.213493] do_syscall_64+0x3f/0x90 [ 38.213832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.214290] [ 38.214466] Freed by task 213: [ 38.214759] kasan_save_stack+0x22/0x50 [ 38.215127] kasan_set_track+0x25/0x30 [ 38.215489] kasan_save_free_info+0x2b/0x50 [ 38.215880] __kasan_slab_free+0x10a/0x190 [ 38.216263] kmem_cache_free+0x10d/0x4d0 [ 38.216619] rcu_core+0x8c8/0x2860 [ 38.216922] __do_softirq+0x1b7/0x7d4 [ 38.217267] [ 38.217432] Last potentially related work creation: [ 38.217875] kasan_save_stack+0x22/0x50 [ 38.218251] __kasan_record_aux_stack+0x8e/0xa0 [ 38.218687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.219136] remove_vma+0x139/0x170 [ 38.219464] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.219872] do_vmi_munmap+0x1f1/0x2b0 [ 38.220215] __vm_munmap+0x138/0x3a0 [ 38.220554] __x64_sys_munmap+0x59/0x80 [ 38.220926] do_syscall_64+0x3f/0x90 [ 38.221273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.221710] [ 38.221852] Second to last potentially related work creation: [ 38.222373] kasan_save_stack+0x22/0x50 [ 38.222765] __kasan_record_aux_stack+0x8e/0xa0 [ 38.223188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.223672] remove_vma+0x139/0x170 [ 38.224015] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.224414] do_vmi_munmap+0x1f1/0x2b0 [ 38.224760] mmap_region+0x1f9/0x2660 [ 38.225102] do_mmap+0x854/0xf00 [ 38.225408] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.225755] ksys_mmap_pgoff+0x3af/0x500 [ 38.226107] do_syscall_64+0x3f/0x90 [ 38.226473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.226930] [ 38.227096] The buggy address belongs to the object at ffff88800e12aae0 [ 38.227096] which belongs to the cache vm_area_struct of size 168 [ 38.228166] The buggy address is located 88 bytes inside of [ 38.228166] freed 168-byte region [ffff88800e12aae0, ffff88800e12ab88) [ 38.229231] [ 38.229390] The buggy address belongs to the physical page: [ 38.229953] page:000000003bee6616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe12a [ 38.230751] memcg:ffff88800d594a01 [ 38.231057] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.231568] page_type: 0xffffffff() [ 38.231906] raw: 0100000000000200 ffff8880087a0c80 ffffea00004e0d40 dead000000000007 [ 38.232585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d594a01 [ 38.233236] page dumped because: kasan: bad access detected [ 38.233706] [ 38.233861] Memory state around the buggy address: [ 38.234264] ffff88800e12aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.234890] ffff88800e12aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.235506] >ffff88800e12ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.236111] ^ [ 38.236550] ffff88800e12ab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.237177] ffff88800e12ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.237824] ================================================================== [ 38.238549] Disabling lock debugging due to kernel taint [ 39.770182] BUG: Bad rss-counter state mm:0000000023eed28e type:MM_FILEPAGES val:33 [ 39.771353] BUG: Bad rss-counter state mm:0000000023eed28e type:MM_ANONPAGES val:22 [ 40.163548] BUG: Bad rss-counter state mm:000000001ab137c3 type:MM_FILEPAGES val:33 [ 40.164251] BUG: Bad rss-counter state mm:000000001ab137c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39102' (ECDSA) to the list of known hosts. 2023/06/21 10:26:39 fuzzer started 2023/06/21 10:26:39 dialing manager at localhost:36067 2023/06/21 10:26:39 checking machine... 2023/06/21 10:26:39 checking revisions... [ 40.708332] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:26:39 testing simple program... [ 40.745522] cgroup: Unknown subsys name 'net' [ 40.783616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:26:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ff66e301000 CR3=0000000016c1e000 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=2039333a36323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a36323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff810ac57d RDX=ffff888016da3680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888016da3680 RSP=ffff88800f707ee0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=ffff888016da4d00 R14=00007f94851f4008 R15=0000000000000000 RIP=ffffffff810ac541 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9485225900 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=00007f94851f4008 CR3=000000000db38000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000