syzkaller login: [ 31.069272] BUG: Bad rss-counter state mm:0000000059f2f022 type:MM_FILEPAGES val:33 [ 31.070325] BUG: Bad rss-counter state mm:0000000059f2f022 type:MM_ANONPAGES val:22 [ 31.108654] ================================================================== [ 31.109376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.110104] Read of size 8 at addr ffff88800cb94df0 by task sshd/219 [ 31.110704] [ 31.110875] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.111542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.112307] Call Trace: [ 31.112557] [ 31.112787] dump_stack_lvl+0x91/0xf0 [ 31.113386] print_report+0xcc/0x620 [ 31.113771] ? __virt_addr_valid+0x102/0x340 [ 31.114195] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115162] kasan_report+0xbe/0xf0 [ 31.115552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116038] vma_interval_tree_remove+0xc75/0xec0 [ 31.116503] vma_prepare+0xc54/0x11a0 [ 31.116894] __split_vma+0x5af/0x950 [ 31.117335] ? __pfx___split_vma+0x10/0x10 [ 31.117648] ? find_held_lock+0x2c/0x110 [ 31.117944] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.118259] ? lock_is_held_type+0x9f/0x120 [ 31.118564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.118910] ? mtree_range_walk+0x632/0x900 [ 31.119219] ? mas_walk+0x5c7/0x7c0 [ 31.119483] do_vmi_munmap+0x1f1/0x2b0 [ 31.119757] mmap_region+0x1f9/0x2660 [ 31.120030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.120725] ? __pfx_lock_acquire+0x10/0x10 [ 31.121040] ? __pfx_mmap_region+0x10/0x10 [ 31.121339] ? security_mmap_addr+0x7d/0xa0 [ 31.121633] ? get_unmapped_area+0x1f5/0x3f0 [ 31.121935] do_mmap+0x854/0xf00 [ 31.122206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.122509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122854] ksys_mmap_pgoff+0x3af/0x500 [ 31.123156] do_syscall_64+0x3f/0x90 [ 31.123440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123830] RIP: 0033:0x7f11db6fbd82 [ 31.124097] 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 [ 31.125407] RSP: 002b:00007ffca49edb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.125964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11db6fbd82 [ 31.126482] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11dab35000 [ 31.127001] RBP: 00007f11dab35000 R08: 0000000000000009 R09: 0000000000001000 [ 31.127527] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a03e01ff70 [ 31.128039] R13: 00007ffca49edb30 R14: 00007ffca49edb60 R15: 00007ffca49edec0 [ 31.128562] [ 31.128752] [ 31.128885] Allocated by task 212: [ 31.129136] kasan_save_stack+0x22/0x50 [ 31.129440] kasan_set_track+0x25/0x30 [ 31.129739] __kasan_slab_alloc+0x59/0x70 [ 31.130055] kmem_cache_alloc+0x16b/0x370 [ 31.130350] vm_area_dup+0x20/0x160 [ 31.130614] __split_vma+0x170/0x950 [ 31.130883] split_vma+0xc6/0x110 [ 31.131145] mprotect_fixup+0x8d2/0xb30 [ 31.131453] do_mprotect_pkey+0x87e/0xd40 [ 31.131724] __x64_sys_mprotect+0x78/0xc0 [ 31.131989] do_syscall_64+0x3f/0x90 [ 31.132274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132638] [ 31.132762] Freed by task 212: [ 31.132985] kasan_save_stack+0x22/0x50 [ 31.133265] kasan_set_track+0x25/0x30 [ 31.133543] kasan_save_free_info+0x2b/0x50 [ 31.133836] __kasan_slab_free+0x10a/0x190 [ 31.134140] kmem_cache_free+0x10d/0x4d0 [ 31.134405] rcu_core+0x8c8/0x2860 [ 31.134638] __do_softirq+0x1b7/0x7d4 [ 31.134884] [ 31.134996] Last potentially related work creation: [ 31.135293] kasan_save_stack+0x22/0x50 [ 31.135552] __kasan_record_aux_stack+0x8e/0xa0 [ 31.135846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.136174] remove_vma+0x139/0x170 [ 31.136426] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.136737] do_vmi_munmap+0x1f1/0x2b0 [ 31.137020] __vm_munmap+0x138/0x3a0 [ 31.137279] __x64_sys_munmap+0x59/0x80 [ 31.137558] do_syscall_64+0x3f/0x90 [ 31.137819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138172] [ 31.138291] The buggy address belongs to the object at ffff88800cb94d98 [ 31.138291] which belongs to the cache vm_area_struct of size 168 [ 31.139122] The buggy address is located 88 bytes inside of [ 31.139122] freed 168-byte region [ffff88800cb94d98, ffff88800cb94e40) [ 31.139904] [ 31.140024] The buggy address belongs to the physical page: [ 31.140388] page:00000000b98f5223 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb94 [ 31.140992] memcg:ffff88800c7d3e01 [ 31.141242] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.141626] page_type: 0xffffffff() [ 31.141894] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.142442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7d3e01 [ 31.142984] page dumped because: kasan: bad access detected [ 31.143381] [ 31.143509] Memory state around the buggy address: [ 31.143865] ffff88800cb94c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.144369] ffff88800cb94d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.144894] >ffff88800cb94d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.145405] ^ [ 31.145892] ffff88800cb94e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.146397] ffff88800cb94e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.146907] ================================================================== [ 31.147450] Disabling lock debugging due to kernel taint [ 32.978480] BUG: Bad rss-counter state mm:000000009f017712 type:MM_FILEPAGES val:33 [ 32.980123] BUG: Bad rss-counter state mm:000000009f017712 type:MM_ANONPAGES val:22 [ 33.451448] BUG: Bad rss-counter state mm:00000000695ec8a0 type:MM_FILEPAGES val:33 [ 33.452437] BUG: Bad rss-counter state mm:00000000695ec8a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53129' (ECDSA) to the list of known hosts. 2023/06/21 03:07:36 fuzzer started 2023/06/21 03:07:36 dialing manager at localhost:36067 2023/06/21 03:07:36 checking machine... 2023/06/21 03:07:36 checking revisions... [ 34.205337] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:07:36 testing simple program... [ 34.257934] cgroup: Unknown subsys name 'net' [ 34.301852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:07:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d683000 RCX=ffffffff836750c6 RDX=ffff8880147c0000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880165c6cc0 RSP=ffff8880147bf918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880165c6cc0 R13=0000000000000000 R14=0000000000000000 R15=ffff88800d683000 RIP=ffffffff814c0864 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 00007f785b887900 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=00007f785acfb2f0 CR3=000000000c9d6000 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=340be092b11d049f434519d5491271d3 XMM02=ec2efd57dc4c00df000000000011b3c0 XMM03=982812067c10f8d1000000000011b490 XMM04=a0270fa09ff5a86200000000000ae988 XMM05=979e120c674ed0600000000000133198 XMM06=dfcdbad4f1609c370000000000132030 XMM07=fb795ef6d657705600000000001221e8 XMM08=2c67c8bc2e329bc3000000000011b430 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007fa1ff0a0650 CR3=000000000e2e2000 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=2036333a37303a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a37303a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000