syzkaller login: [ 30.707081] BUG: Bad rss-counter state mm:00000000a69521f7 type:MM_FILEPAGES val:33 [ 30.708419] BUG: Bad rss-counter state mm:00000000a69521f7 type:MM_ANONPAGES val:22 [ 30.749677] ================================================================== [ 30.750676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751667] Read of size 8 at addr ffff88800e7f9a50 by task sshd/219 [ 30.752572] [ 30.752805] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.753712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754754] Call Trace: [ 30.755091] <TASK> [ 30.755389] dump_stack_lvl+0x91/0xf0 [ 30.755910] print_report+0xcc/0x620 [ 30.756420] ? __virt_addr_valid+0x102/0x340 [ 30.756994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758288] kasan_report+0xbe/0xf0 [ 30.758812] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759463] vma_interval_tree_remove+0xc75/0xec0 [ 30.760100] vma_prepare+0xc54/0x11a0 [ 30.760606] __split_vma+0x5af/0x950 [ 30.761106] ? __pfx___split_vma+0x10/0x10 [ 30.761664] ? find_held_lock+0x2c/0x110 [ 30.762209] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762815] ? lock_is_held_type+0x9f/0x120 [ 30.763387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.764027] ? mtree_range_walk+0x632/0x900 [ 30.764610] ? mas_walk+0x5c7/0x7c0 [ 30.765108] do_vmi_munmap+0x1f1/0x2b0 [ 30.765631] mmap_region+0x1f9/0x2660 [ 30.766137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.766687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.767446] ? __pfx_lock_acquire+0x10/0x10 [ 30.768010] ? __pfx_mmap_region+0x10/0x10 [ 30.768571] ? security_mmap_addr+0x7d/0xa0 [ 30.769128] ? get_unmapped_area+0x1f5/0x3f0 [ 30.769705] do_mmap+0x854/0xf00 [ 30.770165] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.770704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.771295] ksys_mmap_pgoff+0x3af/0x500 [ 30.771830] do_syscall_64+0x3f/0x90 [ 30.772333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773018] RIP: 0033:0x7ff8d6dd6d82 [ 30.773502] 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 [ 30.775829] RSP: 002b:00007ffd97da0a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.776807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8d6dd6d82 [ 30.777721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8d6210000 [ 30.778652] RBP: 00007ff8d6210000 R08: 0000000000000009 R09: 0000000000001000 [ 30.779567] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9e54caec0 [ 30.780482] R13: 00007ffd97da0ab0 R14: 00007ffd97da0ae0 R15: 00007ffd97da0e40 [ 30.781418] </TASK> [ 30.781741] [ 30.781974] Allocated by task 212: [ 30.782456] kasan_save_stack+0x22/0x50 [ 30.783003] kasan_set_track+0x25/0x30 [ 30.783540] __kasan_slab_alloc+0x59/0x70 [ 30.784112] kmem_cache_alloc+0x16b/0x370 [ 30.784672] vm_area_dup+0x20/0x160 [ 30.785169] __split_vma+0x170/0x950 [ 30.785677] split_vma+0xc6/0x110 [ 30.786154] mprotect_fixup+0x8d2/0xb30 [ 30.786707] do_mprotect_pkey+0x87e/0xd40 [ 30.787283] __x64_sys_mprotect+0x78/0xc0 [ 30.787830] do_syscall_64+0x3f/0x90 [ 30.788329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789010] [ 30.789241] Freed by task 19: [ 30.789645] kasan_save_stack+0x22/0x50 [ 30.790176] kasan_set_track+0x25/0x30 [ 30.790719] kasan_save_free_info+0x2b/0x50 [ 30.791282] __kasan_slab_free+0x10a/0x190 [ 30.791862] kmem_cache_free+0x10d/0x4d0 [ 30.792411] rcu_core+0x8c8/0x2860 [ 30.792904] __do_softirq+0x1b7/0x7d4 [ 30.793417] [ 30.793651] Last potentially related work creation: [ 30.794266] kasan_save_stack+0x22/0x50 [ 30.794815] __kasan_record_aux_stack+0x8e/0xa0 [ 30.795425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796108] remove_vma+0x139/0x170 [ 30.796590] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797185] do_vmi_munmap+0x1f1/0x2b0 [ 30.797753] __vm_munmap+0x138/0x3a0 [ 30.798259] __x64_sys_munmap+0x59/0x80 [ 30.798801] do_syscall_64+0x3f/0x90 [ 30.799309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799988] [ 30.800214] The buggy address belongs to the object at ffff88800e7f99f8 [ 30.800214] which belongs to the cache vm_area_struct of size 168 [ 30.801765] The buggy address is located 88 bytes inside of [ 30.801765] freed 168-byte region [ffff88800e7f99f8, ffff88800e7f9aa0) [ 30.803316] [ 30.803544] The buggy address belongs to the physical page: [ 30.804243] page:00000000bb848238 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7f9 [ 30.805387] memcg:ffff88800e736101 [ 30.805838] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806528] page_type: 0xffffffff() [ 30.807004] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.807989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e736101 [ 30.808973] page dumped because: kasan: bad access detected [ 30.809699] [ 30.809931] Memory state around the buggy address: [ 30.810587] ffff88800e7f9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.811511] ffff88800e7f9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.812436] >ffff88800e7f9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.813358] ^ [ 30.814116] ffff88800e7f9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.815044] ffff88800e7f9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.815959] ================================================================== [ 30.817082] Disabling lock debugging due to kernel taint [ 32.750216] BUG: Bad rss-counter state mm:00000000ecee324f type:MM_FILEPAGES val:33 [ 32.751702] BUG: Bad rss-counter state mm:00000000ecee324f type:MM_ANONPAGES val:22 [ 33.274162] BUG: Bad rss-counter state mm:0000000088cdbaa9 type:MM_FILEPAGES val:33 [ 33.275364] BUG: Bad rss-counter state mm:0000000088cdbaa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37413' (ECDSA) to the list of known hosts. 2023/06/20 16:34:14 fuzzer started 2023/06/20 16:34:14 dialing manager at localhost:36067 2023/06/20 16:34:14 checking machine... 2023/06/20 16:34:14 checking revisions... [ 33.828344] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:34:14 testing simple program... [ 33.884309] cgroup: Unknown subsys name 'net' [ 33.929905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:34:13 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800f043680 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019c97968 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d3c9ab0 RIP=ffffffff814c0871 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 00007fbac6199900 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=00007fff19492000 CR3=000000000e4e4000 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=00007f6602cca990 CR3=0000000019e0c000 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=2033313a34333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a34333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000