[ 30.044231] BUG: Bad rss-counter state mm:0000000036203d65 type:MM_FILEPAGES val:33 [ 30.045465] BUG: Bad rss-counter state mm:0000000036203d65 type:MM_ANONPAGES val:22 [ 30.072679] ================================================================== [ 30.073479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.074306] Read of size 8 at addr ffff88800e6a5ed8 by task sshd/218 [ 30.074988] [ 30.075200] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.075964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.076828] Call Trace: [ 30.077136] [ 30.077380] dump_stack_lvl+0x91/0xf0 [ 30.077853] print_report+0xcc/0x620 [ 30.078311] ? __virt_addr_valid+0x102/0x340 [ 30.078790] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.079308] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.079833] kasan_report+0xbe/0xf0 [ 30.080290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.080806] vma_interval_tree_remove+0xc75/0xec0 [ 30.081287] vma_prepare+0xc54/0x11a0 [ 30.081725] __split_vma+0x5af/0x950 [ 30.082140] ? __pfx___split_vma+0x10/0x10 [ 30.082428] ? find_held_lock+0x2c/0x110 [ 30.082712] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.083064] ? lock_is_held_type+0x9f/0x120 [ 30.083472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.083834] ? mtree_range_walk+0x632/0x900 [ 30.084152] ? mas_walk+0x5c7/0x7c0 [ 30.084430] do_vmi_munmap+0x1f1/0x2b0 [ 30.084714] mmap_region+0x1f9/0x2660 [ 30.084988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.085285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.085710] ? __pfx_lock_acquire+0x10/0x10 [ 30.086022] ? __pfx_mmap_region+0x10/0x10 [ 30.086331] ? security_mmap_addr+0x7d/0xa0 [ 30.086641] ? get_unmapped_area+0x1f5/0x3f0 [ 30.086968] do_mmap+0x854/0xf00 [ 30.087222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.087501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.087824] ksys_mmap_pgoff+0x3af/0x500 [ 30.088113] do_syscall_64+0x3f/0x90 [ 30.088393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.088774] RIP: 0033:0x7f5b4f176d82 [ 30.089041] 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 [ 30.090266] RSP: 002b:00007fff6f2ec828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.090801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b4f176d82 [ 30.091291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b4e5b0000 [ 30.091770] RBP: 00007f5b4e5b0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.092262] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e373272f70 [ 30.092737] R13: 00007fff6f2ec840 R14: 00007fff6f2ec870 R15: 00007fff6f2ecbd0 [ 30.093233] [ 30.093399] [ 30.093527] Allocated by task 211: [ 30.093792] kasan_save_stack+0x22/0x50 [ 30.094088] kasan_set_track+0x25/0x30 [ 30.094376] __kasan_slab_alloc+0x59/0x70 [ 30.094677] kmem_cache_alloc+0x16b/0x370 [ 30.094978] vm_area_dup+0x20/0x160 [ 30.095238] __split_vma+0x170/0x950 [ 30.095507] split_vma+0xc6/0x110 [ 30.095762] mprotect_fixup+0x8d2/0xb30 [ 30.096055] do_mprotect_pkey+0x87e/0xd40 [ 30.096358] __x64_sys_mprotect+0x78/0xc0 [ 30.096665] do_syscall_64+0x3f/0x90 [ 30.096935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.097303] [ 30.097425] Freed by task 211: [ 30.097664] kasan_save_stack+0x22/0x50 [ 30.097954] kasan_set_track+0x25/0x30 [ 30.098240] kasan_save_free_info+0x2b/0x50 [ 30.098551] __kasan_slab_free+0x10a/0x190 [ 30.098862] kmem_cache_free+0x10d/0x4d0 [ 30.099154] rcu_core+0x8c8/0x2860 [ 30.099405] __do_softirq+0x1b7/0x7d4 [ 30.099687] [ 30.099812] Last potentially related work creation: [ 30.100151] kasan_save_stack+0x22/0x50 [ 30.100442] __kasan_record_aux_stack+0x8e/0xa0 [ 30.100770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.101141] remove_vma+0x139/0x170 [ 30.101397] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.101721] do_vmi_munmap+0x1f1/0x2b0 [ 30.102001] __vm_munmap+0x138/0x3a0 [ 30.102266] __x64_sys_munmap+0x59/0x80 [ 30.102742] do_syscall_64+0x3f/0x90 [ 30.103034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103411] [ 30.103540] Second to last potentially related work creation: [ 30.103939] kasan_save_stack+0x22/0x50 [ 30.104235] __kasan_record_aux_stack+0x8e/0xa0 [ 30.104561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.104946] remove_vma+0x139/0x170 [ 30.105205] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.105519] do_vmi_munmap+0x1f1/0x2b0 [ 30.105802] mmap_region+0x1f9/0x2660 [ 30.106072] do_mmap+0x854/0xf00 [ 30.106319] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.106602] ksys_mmap_pgoff+0x3af/0x500 [ 30.106888] do_syscall_64+0x3f/0x90 [ 30.107163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.107528] [ 30.107650] The buggy address belongs to the object at ffff88800e6a5e80 [ 30.107650] which belongs to the cache vm_area_struct of size 168 [ 30.108522] The buggy address is located 88 bytes inside of [ 30.108522] freed 168-byte region [ffff88800e6a5e80, ffff88800e6a5f28) [ 30.109335] [ 30.109458] The buggy address belongs to the physical page: [ 30.109858] page:000000006efe669d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6a5 [ 30.110501] memcg:ffff88800cc21001 [ 30.110755] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.111134] page_type: 0xffffffff() [ 30.111400] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f200 dead000000000008 [ 30.111940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc21001 [ 30.112461] page dumped because: kasan: bad access detected [ 30.112844] [ 30.112966] Memory state around the buggy address: [ 30.113308] ffff88800e6a5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.113816] ffff88800e6a5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.114318] >ffff88800e6a5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.114820] ^ [ 30.115235] ffff88800e6a5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.115737] ffff88800e6a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.116235] ================================================================== [ 30.116787] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.281902] BUG: Bad rss-counter state mm:000000004d422efe type:MM_FILEPAGES val:33 [ 32.282897] BUG: Bad rss-counter state mm:000000004d422efe type:MM_ANONPAGES val:22 [ 32.737109] BUG: Bad rss-counter state mm:00000000f813b8e8 type:MM_FILEPAGES val:33 [ 32.738085] BUG: Bad rss-counter state mm:00000000f813b8e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18343' (ECDSA) to the list of known hosts. 2023/06/21 06:21:30 fuzzer started 2023/06/21 06:21:30 dialing manager at localhost:36067 2023/06/21 06:21:30 checking machine... 2023/06/21 06:21:30 checking revisions... [ 33.449123] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:21:30 testing simple program... [ 33.489814] cgroup: Unknown subsys name 'net' [ 33.528286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888019e49b40 RSI=ffffffff844a0bd3 RDI=0000000000000000 RBP=ffff888016a2e018 RSP=ffff8880068df430 R8 =0000000000000000 R9 =0000000000000002 R10=000000000000000f R11=00000000000b6a61 R12=000000000000000f R13=00007ff56953d000 R14=00007ff569530fff R15=dffffc0000000000 RIP=ffffffff814c089b 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 00007ff569551900 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=00007ff569530020 CR3=000000000c4fc000 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=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 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=00007fe82ea98c00 CR3=0000000018156000 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=2030333a31323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000