[ 23.892038] BUG: Bad rss-counter state mm:00000000809dfd99 type:MM_FILEPAGES val:33 [ 23.893981] BUG: Bad rss-counter state mm:00000000809dfd99 type:MM_ANONPAGES val:22 [ 24.005066] ================================================================== [ 24.006189] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.007336] Read of size 8 at addr ffff88801bcf2c20 by task sshd/219 [ 24.008474] [ 24.008702] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.009305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.009989] Call Trace: [ 24.010208] <TASK> [ 24.010417] dump_stack_lvl+0x91/0xf0 [ 24.010759] print_report+0xcc/0x620 [ 24.011098] ? __virt_addr_valid+0x102/0x340 [ 24.011484] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.011920] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.012330] kasan_report+0xbe/0xf0 [ 24.012628] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.013014] vma_interval_tree_remove+0xc75/0xec0 [ 24.013448] vma_prepare+0xc54/0x11a0 [ 24.013782] __split_vma+0x5af/0x950 [ 24.014113] ? __pfx___split_vma+0x10/0x10 [ 24.014484] ? find_held_lock+0x2c/0x110 [ 24.014859] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.015257] ? lock_is_held_type+0x9f/0x120 [ 24.015648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.016077] ? mtree_range_walk+0x632/0x900 [ 24.016475] ? mas_walk+0x5c7/0x7c0 [ 24.016803] do_vmi_munmap+0x1f1/0x2b0 [ 24.017148] mmap_region+0x1f9/0x2660 [ 24.017491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.017843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.018345] ? __pfx_lock_acquire+0x10/0x10 [ 24.018725] ? __pfx_mmap_region+0x10/0x10 [ 24.019095] ? security_mmap_addr+0x7d/0xa0 [ 24.019460] ? get_unmapped_area+0x1f5/0x3f0 [ 24.019859] do_mmap+0x854/0xf00 [ 24.020177] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.020530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.020915] ksys_mmap_pgoff+0x3af/0x500 [ 24.021271] do_syscall_64+0x3f/0x90 [ 24.021614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.022088] RIP: 0033:0x7f8a0c9dfd82 [ 24.022399] 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 [ 24.023888] RSP: 002b:00007ffd37d41988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.024540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a0c9dfd82 [ 24.025133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a0be19000 [ 24.025727] RBP: 00007f8a0be19000 R08: 0000000000000009 R09: 0000000000001000 [ 24.026316] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fd1e28d90 [ 24.026898] R13: 00007ffd37d419a0 R14: 00007ffd37d419d0 R15: 00007ffd37d41d30 [ 24.027495] </TASK> [ 24.027703] [ 24.027852] Allocated by task 211: [ 24.028151] kasan_save_stack+0x22/0x50 [ 24.028511] kasan_set_track+0x25/0x30 [ 24.028859] __kasan_slab_alloc+0x59/0x70 [ 24.029226] kmem_cache_alloc+0x16b/0x370 [ 24.029591] vm_area_dup+0x20/0x160 [ 24.029913] __split_vma+0x170/0x950 [ 24.030237] split_vma+0xc6/0x110 [ 24.030548] mprotect_fixup+0x8d2/0xb30 [ 24.030896] do_mprotect_pkey+0x87e/0xd40 [ 24.031268] __x64_sys_mprotect+0x78/0xc0 [ 24.031637] do_syscall_64+0x3f/0x90 [ 24.031967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.032426] [ 24.032579] Freed by task 211: [ 24.032851] kasan_save_stack+0x22/0x50 [ 24.033194] kasan_set_track+0x25/0x30 [ 24.033534] kasan_save_free_info+0x2b/0x50 [ 24.033910] __kasan_slab_free+0x10a/0x190 [ 24.034277] kmem_cache_free+0x10d/0x4d0 [ 24.034632] rcu_core+0x8c8/0x2860 [ 24.034943] __do_softirq+0x1b7/0x7d4 [ 24.035274] [ 24.035424] Last potentially related work creation: [ 24.035833] kasan_save_stack+0x22/0x50 [ 24.036192] __kasan_record_aux_stack+0x8e/0xa0 [ 24.036598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.037057] remove_vma+0x139/0x170 [ 24.037373] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.037773] do_vmi_munmap+0x1f1/0x2b0 [ 24.038108] __vm_munmap+0x138/0x3a0 [ 24.038428] __x64_sys_munmap+0x59/0x80 [ 24.038777] do_syscall_64+0x3f/0x90 [ 24.039104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.039539] [ 24.039688] The buggy address belongs to the object at ffff88801bcf2bc8 [ 24.039688] which belongs to the cache vm_area_struct of size 168 [ 24.040710] The buggy address is located 88 bytes inside of [ 24.040710] freed 168-byte region [ffff88801bcf2bc8, ffff88801bcf2c70) [ 24.041689] [ 24.041835] The buggy address belongs to the physical page: [ 24.042293] page:00000000357276e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcf2 [ 24.043045] memcg:ffff88801bc9a501 [ 24.043336] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.043792] page_type: 0xffffffff() [ 24.044114] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.044762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc9a501 [ 24.045384] page dumped because: kasan: bad access detected [ 24.045833] [ 24.045980] Memory state around the buggy address: [ 24.046381] ffff88801bcf2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.046972] ffff88801bcf2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.047565] >ffff88801bcf2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.048154] ^ [ 24.048526] ffff88801bcf2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.049186] ffff88801bcf2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.049787] ================================================================== [ 24.050429] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.038769] BUG: Bad rss-counter state mm:00000000043519fb type:MM_FILEPAGES val:33 [ 26.039968] BUG: Bad rss-counter state mm:00000000043519fb type:MM_ANONPAGES val:22 [ 26.564728] BUG: Bad rss-counter state mm:00000000746a541f type:MM_FILEPAGES val:33 [ 26.565892] BUG: Bad rss-counter state mm:00000000746a541f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38370' (ECDSA) to the list of known hosts. 2023/06/21 07:01:45 fuzzer started 2023/06/21 07:01:46 dialing manager at localhost:36067 2023/06/21 07:01:46 checking machine... 2023/06/21 07:01:46 checking revisions... [ 27.164940] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:01:46 testing simple program... [ 27.198386] cgroup: Unknown subsys name 'net' [ 27.234030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:01:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=000000000002c3c0 RCX=0000607f92e0c408 RDX=1ffff11001223800 RSI=0000000000000000 RDI=ffff88801430b000 RBP=ffffffff852c7900 RSP=ffff88801439f918 R8 =0000000000000000 R9 =fffff940000bfb08 R10=ffffea00005fd847 R11=00000000000b6d53 R12=ffff88801430b000 R13=0000000000000000 R14=ffff88801430c000 R15=ffffea00005fd840 RIP=ffffffff814c0864 RFL=00000082 [--S----] 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 00007f2aaec64900 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=00007f2aae0c5ae0 CR3=000000000eb38000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=22d9407e097ef8ea00000000000ae988 XMM05=d29eebee2b7493140000000000132720 XMM06=806171799158d9670000000000131450 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=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=0000558dae7beb40 CR3=000000000e67e000 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=31303a3730203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035343a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000