[ 44.853653] BUG: Bad rss-counter state mm:000000004d6485f4 type:MM_FILEPAGES val:33 [ 44.854645] BUG: Bad rss-counter state mm:000000004d6485f4 type:MM_ANONPAGES val:22 [ 45.023298] ================================================================== [ 45.024231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.025194] Read of size 8 at addr ffff88801b05f058 by task sshd/219 [ 45.025985] [ 45.026207] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.027187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.028184] Call Trace: [ 45.028520] [ 45.028829] dump_stack_lvl+0x91/0xf0 [ 45.029327] print_report+0xcc/0x620 [ 45.029818] ? __virt_addr_valid+0x102/0x340 [ 45.030373] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.031007] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.031638] kasan_report+0xbe/0xf0 [ 45.032120] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.032745] vma_interval_tree_remove+0xc75/0xec0 [ 45.033355] vma_prepare+0xc54/0x11a0 [ 45.033843] __split_vma+0x5af/0x950 [ 45.034316] ? __pfx___split_vma+0x10/0x10 [ 45.034854] ? find_held_lock+0x2c/0x110 [ 45.035380] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.035973] ? lock_is_held_type+0x9f/0x120 [ 45.036516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.037141] ? mtree_range_walk+0x632/0x900 [ 45.037700] ? mas_walk+0x5c7/0x7c0 [ 45.038185] do_vmi_munmap+0x1f1/0x2b0 [ 45.038690] mmap_region+0x1f9/0x2660 [ 45.039183] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.039720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.040466] ? __pfx_lock_acquire+0x10/0x10 [ 45.041017] ? __pfx_mmap_region+0x10/0x10 [ 45.041550] ? security_mmap_addr+0x7d/0xa0 [ 45.042091] ? get_unmapped_area+0x1f5/0x3f0 [ 45.042648] do_mmap+0x854/0xf00 [ 45.043105] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.043621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.044205] ksys_mmap_pgoff+0x3af/0x500 [ 45.044716] do_syscall_64+0x3f/0x90 [ 45.045198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.045854] RIP: 0033:0x7fb0d7f4bd82 [ 45.046322] 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 [ 45.048500] RSP: 002b:00007ffeb114bec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.049414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0d7f4bd82 [ 45.050281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0d7385000 [ 45.051133] RBP: 00007fb0d7385000 R08: 0000000000000009 R09: 0000000000001000 [ 45.052024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055893543fb20 [ 45.052915] R13: 00007ffeb114bee0 R14: 00007ffeb114bf10 R15: 00007ffeb114c270 [ 45.053790] [ 45.054084] [ 45.054297] Allocated by task 208: [ 45.054730] kasan_save_stack+0x22/0x50 [ 45.055237] kasan_set_track+0x25/0x30 [ 45.055749] __kasan_slab_alloc+0x59/0x70 [ 45.056282] kmem_cache_alloc+0x16b/0x370 [ 45.056801] vm_area_dup+0x20/0x160 [ 45.057262] __split_vma+0x170/0x950 [ 45.057742] split_vma+0xc6/0x110 [ 45.058201] mprotect_fixup+0x8d2/0xb30 [ 45.058717] do_mprotect_pkey+0x87e/0xd40 [ 45.059247] __x64_sys_mprotect+0x78/0xc0 [ 45.059780] do_syscall_64+0x3f/0x90 [ 45.060262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.060908] [ 45.061128] Freed by task 203: [ 45.061527] kasan_save_stack+0x22/0x50 [ 45.062043] kasan_set_track+0x25/0x30 [ 45.062549] kasan_save_free_info+0x2b/0x50 [ 45.063091] __kasan_slab_free+0x10a/0x190 [ 45.063641] kmem_cache_free+0x10d/0x4d0 [ 45.064146] rcu_core+0x8c8/0x2860 [ 45.064593] __do_softirq+0x1b7/0x7d4 [ 45.065066] [ 45.065279] Last potentially related work creation: [ 45.065869] kasan_save_stack+0x22/0x50 [ 45.066373] __kasan_record_aux_stack+0x8e/0xa0 [ 45.066961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.067619] remove_vma+0x139/0x170 [ 45.068070] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.068634] do_vmi_munmap+0x1f1/0x2b0 [ 45.069124] __vm_munmap+0x138/0x3a0 [ 45.069589] __x64_sys_munmap+0x59/0x80 [ 45.070093] do_syscall_64+0x3f/0x90 [ 45.070574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.071214] [ 45.071437] The buggy address belongs to the object at ffff88801b05f000 [ 45.071437] which belongs to the cache vm_area_struct of size 168 [ 45.072916] The buggy address is located 88 bytes inside of [ 45.072916] freed 168-byte region [ffff88801b05f000, ffff88801b05f0a8) [ 45.074321] [ 45.074539] The buggy address belongs to the physical page: [ 45.075206] page:00000000077f4033 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b05f [ 45.076340] memcg:ffff888018f6e701 [ 45.076774] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.077422] page_type: 0xffffffff() [ 45.077877] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.078802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f6e701 [ 45.079724] page dumped because: kasan: bad access detected [ 45.080391] [ 45.080608] Memory state around the buggy address: [ 45.081194] ffff88801b05ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 45.082065] ffff88801b05ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 45.082927] >ffff88801b05f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.083818] ^ [ 45.084539] ffff88801b05f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 45.085395] ffff88801b05f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.086254] ================================================================== [ 45.087229] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 46.872834] BUG: Bad rss-counter state mm:0000000053356bfd type:MM_FILEPAGES val:33 [ 46.874043] BUG: Bad rss-counter state mm:0000000053356bfd type:MM_ANONPAGES val:22 [ 47.302043] BUG: Bad rss-counter state mm:0000000019cbf53a type:MM_FILEPAGES val:33 [ 47.303075] BUG: Bad rss-counter state mm:0000000019cbf53a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14217' (ECDSA) to the list of known hosts. 2023/06/19 15:05:57 fuzzer started 2023/06/19 15:05:57 dialing manager at localhost:44161 2023/06/19 15:05:57 checking machine... 2023/06/19 15:05:57 checking revisions... [ 48.028197] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:05:57 testing simple program... [ 48.074003] cgroup: Unknown subsys name 'net' [ 48.124765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:05:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880147e7928 RCX=0000000000000000 RDX=ffff88800d56b680 RSI=0000000000000000 RDI=00000000fffffffe RBP=ffff8880147e7918 RSP=ffff8880147e7828 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0030733a745f6c65 R12=0000000000000000 R13=ffff8880101f80d8 R14=ffff8880101f8000 R15=ffff888008f47808 RIP=ffffffff814c0384 RFL=00000282 [--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9e7fe19900 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=00007f227b934650 CR3=000000000c5ae000 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=4408c07021a3cfa49c4942e3ff74b1f7 XMM02=000000000011ccf8d59e07bde36eea69 XMM03=000000000011ce20ec2efd57dc4c00df XMM04=db14252b1ca2ead300000000000ae988 XMM05=7c1fc8ea73cd280c0000000000134950 XMM06=806171799158d96700000000001333d0 XMM07=fb795ef6d65770560000000000123360 XMM08=2c67c8bc2e329bc3000000000011ce20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe9cb1fa38 CR3=0000000005482000 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=00007f8f721d35100000555ffa560790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000