[ 23.825836] BUG: Bad rss-counter state mm:00000000014648f7 type:MM_FILEPAGES val:33 [ 23.826866] BUG: Bad rss-counter state mm:00000000014648f7 type:MM_ANONPAGES val:22 [ 23.994214] ================================================================== [ 23.995159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.996104] Read of size 8 at addr ffff88801a329c20 by task sshd/219 [ 23.997034] [ 23.997268] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.998143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.999157] Call Trace: [ 23.999477] [ 23.999766] dump_stack_lvl+0x91/0xf0 [ 24.000259] print_report+0xcc/0x620 [ 24.000751] ? __virt_addr_valid+0x102/0x340 [ 24.001325] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.001949] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.002580] kasan_report+0xbe/0xf0 [ 24.003065] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.003690] vma_interval_tree_remove+0xc75/0xec0 [ 24.004302] vma_prepare+0xc54/0x11a0 [ 24.004791] __split_vma+0x5af/0x950 [ 24.005287] ? __pfx___split_vma+0x10/0x10 [ 24.005824] ? find_held_lock+0x2c/0x110 [ 24.006346] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.006917] ? lock_is_held_type+0x9f/0x120 [ 24.007465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.008081] ? mtree_range_walk+0x632/0x900 [ 24.008633] ? mas_walk+0x5c7/0x7c0 [ 24.009114] do_vmi_munmap+0x1f1/0x2b0 [ 24.009616] mmap_region+0x1f9/0x2660 [ 24.010101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.010615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.011342] ? __pfx_lock_acquire+0x10/0x10 [ 24.011880] ? __pfx_mmap_region+0x10/0x10 [ 24.012408] ? security_mmap_addr+0x7d/0xa0 [ 24.012949] ? get_unmapped_area+0x1f5/0x3f0 [ 24.013522] do_mmap+0x854/0xf00 [ 24.013965] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.014461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.015025] ksys_mmap_pgoff+0x3af/0x500 [ 24.015540] do_syscall_64+0x3f/0x90 [ 24.016022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.016670] RIP: 0033:0x7f5d9e525d82 [ 24.017133] 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 [ 24.019273] RSP: 002b:00007ffd120e60d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.020181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d9e525d82 [ 24.021038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d9d95f000 [ 24.021907] RBP: 00007f5d9d95f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.022755] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa4d930b20 [ 24.023605] R13: 00007ffd120e60f0 R14: 00007ffd120e6120 R15: 00007ffd120e6480 [ 24.024474] [ 24.024774] [ 24.024997] Allocated by task 212: [ 24.025451] kasan_save_stack+0x22/0x50 [ 24.025962] kasan_set_track+0x25/0x30 [ 24.026462] __kasan_slab_alloc+0x59/0x70 [ 24.026996] kmem_cache_alloc+0x16b/0x370 [ 24.027517] vm_area_dup+0x20/0x160 [ 24.027984] __split_vma+0x170/0x950 [ 24.028455] split_vma+0xc6/0x110 [ 24.028901] mprotect_fixup+0x8d2/0xb30 [ 24.029417] do_mprotect_pkey+0x87e/0xd40 [ 24.029964] __x64_sys_mprotect+0x78/0xc0 [ 24.030488] do_syscall_64+0x3f/0x90 [ 24.030964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.031611] [ 24.031830] Freed by task 13: [ 24.032215] kasan_save_stack+0x22/0x50 [ 24.032718] kasan_set_track+0x25/0x30 [ 24.033212] kasan_save_free_info+0x2b/0x50 [ 24.033771] __kasan_slab_free+0x10a/0x190 [ 24.034309] kmem_cache_free+0x10d/0x4d0 [ 24.034828] rcu_core+0x8c8/0x2860 [ 24.035279] __do_softirq+0x1b7/0x7d4 [ 24.035768] [ 24.035985] Last potentially related work creation: [ 24.036574] kasan_save_stack+0x22/0x50 [ 24.037088] __kasan_record_aux_stack+0x8e/0xa0 [ 24.037672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.038387] remove_vma+0x139/0x170 [ 24.038840] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.039397] do_vmi_munmap+0x1f1/0x2b0 [ 24.039889] __vm_munmap+0x138/0x3a0 [ 24.040358] __x64_sys_munmap+0x59/0x80 [ 24.040856] do_syscall_64+0x3f/0x90 [ 24.041360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.042013] [ 24.042235] The buggy address belongs to the object at ffff88801a329bc8 [ 24.042235] which belongs to the cache vm_area_struct of size 168 [ 24.043701] The buggy address is located 88 bytes inside of [ 24.043701] freed 168-byte region [ffff88801a329bc8, ffff88801a329c70) [ 24.045112] [ 24.045334] The buggy address belongs to the physical page: [ 24.045991] page:00000000bfb21566 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a329 [ 24.047087] memcg:ffff88800d5e1e01 [ 24.047510] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.048159] page_type: 0xffffffff() [ 24.048623] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.049567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5e1e01 [ 24.050471] page dumped because: kasan: bad access detected [ 24.051147] [ 24.051368] Memory state around the buggy address: [ 24.051945] ffff88801a329b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.052800] ffff88801a329b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.053675] >ffff88801a329c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.054529] ^ [ 24.055059] ffff88801a329c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.055914] ffff88801a329d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.056772] ================================================================== [ 24.057791] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.239797] BUG: Bad rss-counter state mm:00000000b260f74f type:MM_FILEPAGES val:33 [ 26.241578] BUG: Bad rss-counter state mm:00000000b260f74f type:MM_ANONPAGES val:22 [ 26.704775] BUG: Bad rss-counter state mm:000000006ef1fc25 type:MM_FILEPAGES val:33 [ 26.705845] BUG: Bad rss-counter state mm:000000006ef1fc25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37464' (ECDSA) to the list of known hosts. 2023/06/21 02:05:55 fuzzer started 2023/06/21 02:05:55 dialing manager at localhost:36067 2023/06/21 02:05:55 checking machine... 2023/06/21 02:05:55 checking revisions... [ 27.442393] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:05:55 testing simple program... [ 27.484538] cgroup: Unknown subsys name 'net' [ 27.565632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:05:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806ce09ae0 RSI=ffffffff85407ee8 RDI=ffff88806ce09ae8 RBP=0000000000000000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ee8 R15=ffff88806ce09a98 RIP=ffffffff81131c58 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 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=00007fd088d688c0 CR3=0000000019c1c000 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=2034353a35303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800fd0fce8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f587cab6900 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=00005603f8a65f40 CR3=000000000dca0000 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