[ 30.794982] BUG: Bad rss-counter state mm:0000000055665d15 type:MM_FILEPAGES val:33 [ 30.795726] BUG: Bad rss-counter state mm:0000000055665d15 type:MM_ANONPAGES val:22 [ 30.963761] ================================================================== [ 30.964418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.965129] Read of size 8 at addr ffff88800ed795c8 by task sshd/220 [ 30.965728] [ 30.965900] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.966549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.968605] Call Trace: [ 30.969339] [ 30.969967] dump_stack_lvl+0x91/0xf0 [ 30.971133] print_report+0xcc/0x620 [ 30.972195] ? __virt_addr_valid+0x102/0x340 [ 30.973542] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975048] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.976460] kasan_report+0xbe/0xf0 [ 30.977518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979046] vma_interval_tree_remove+0xc75/0xec0 [ 30.980424] vma_prepare+0xc54/0x11a0 [ 30.981460] __split_vma+0x5af/0x950 [ 30.982501] ? __pfx___split_vma+0x10/0x10 [ 30.983823] ? find_held_lock+0x2c/0x110 [ 30.984972] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.986222] ? lock_is_held_type+0x9f/0x120 [ 30.987538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.988932] ? mtree_range_walk+0x632/0x900 [ 30.990190] ? mas_walk+0x5c7/0x7c0 [ 30.991366] do_vmi_munmap+0x1f1/0x2b0 [ 30.992449] mmap_region+0x1f9/0x2660 [ 30.993535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.994645] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.996362] ? __pfx_lock_acquire+0x10/0x10 [ 30.997671] ? __pfx_mmap_region+0x10/0x10 [ 30.998893] ? security_mmap_addr+0x7d/0xa0 [ 31.000087] ? get_unmapped_area+0x1f5/0x3f0 [ 31.001464] do_mmap+0x854/0xf00 [ 31.002445] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.003592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.004990] ksys_mmap_pgoff+0x3af/0x500 [ 31.006111] do_syscall_64+0x3f/0x90 [ 31.007153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008542] RIP: 0033:0x7f5fbcc1bd82 [ 31.009654] 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 [ 31.014942] RSP: 002b:00007ffef3f80b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.017171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fbcc1bd82 [ 31.019108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fbc055000 [ 31.021232] RBP: 00007f5fbc055000 R08: 0000000000000009 R09: 0000000000001000 [ 31.023237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a45c0db20 [ 31.025345] R13: 00007ffef3f80b80 R14: 00007ffef3f80bb0 R15: 00007ffef3f80f10 [ 31.027361] [ 31.028008] [ 31.028462] Allocated by task 211: [ 31.029541] kasan_save_stack+0x22/0x50 [ 31.030649] kasan_set_track+0x25/0x30 [ 31.031888] __kasan_slab_alloc+0x59/0x70 [ 31.033123] kmem_cache_alloc+0x16b/0x370 [ 31.034217] vm_area_dup+0x20/0x160 [ 31.035167] __split_vma+0x170/0x950 [ 31.036190] split_vma+0xc6/0x110 [ 31.037169] mprotect_fixup+0x8d2/0xb30 [ 31.038146] do_mprotect_pkey+0x87e/0xd40 [ 31.039167] __x64_sys_mprotect+0x78/0xc0 [ 31.040192] do_syscall_64+0x3f/0x90 [ 31.041238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.042559] [ 31.042953] Freed by task 211: [ 31.043707] kasan_save_stack+0x22/0x50 [ 31.044775] kasan_set_track+0x25/0x30 [ 31.045748] kasan_save_free_info+0x2b/0x50 [ 31.046811] __kasan_slab_free+0x10a/0x190 [ 31.047835] kmem_cache_free+0x10d/0x4d0 [ 31.048920] rcu_core+0x8c8/0x2860 [ 31.049710] __do_softirq+0x1b7/0x7d4 [ 31.050539] [ 31.050890] Last potentially related work creation: [ 31.051945] kasan_save_stack+0x22/0x50 [ 31.052964] __kasan_record_aux_stack+0x8e/0xa0 [ 31.054102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.055299] remove_vma+0x139/0x170 [ 31.056074] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.057147] do_vmi_munmap+0x1f1/0x2b0 [ 31.058030] __vm_munmap+0x138/0x3a0 [ 31.058945] __x64_sys_munmap+0x59/0x80 [ 31.059880] do_syscall_64+0x3f/0x90 [ 31.060922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.062218] [ 31.062634] The buggy address belongs to the object at ffff88800ed79570 [ 31.062634] which belongs to the cache vm_area_struct of size 168 [ 31.065924] The buggy address is located 88 bytes inside of [ 31.065924] freed 168-byte region [ffff88800ed79570, ffff88800ed79618) [ 31.069058] [ 31.069461] The buggy address belongs to the physical page: [ 31.070855] page:000000003e142980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed79 [ 31.073297] memcg:ffff88800e79b601 [ 31.074186] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075517] page_type: 0xffffffff() [ 31.076418] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7240 dead000000000008 [ 31.078440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e79b601 [ 31.080333] page dumped because: kasan: bad access detected [ 31.081838] [ 31.082259] Memory state around the buggy address: [ 31.083479] ffff88800ed79480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.085394] ffff88800ed79500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.087218] >ffff88800ed79580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.089146] ^ [ 31.090573] ffff88800ed79600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.092390] ffff88800ed79680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.097642] ================================================================== [ 31.099707] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.273129] BUG: Bad rss-counter state mm:000000009e41e175 type:MM_FILEPAGES val:33 [ 33.273875] BUG: Bad rss-counter state mm:000000009e41e175 type:MM_ANONPAGES val:22 [ 33.891554] BUG: Bad rss-counter state mm:000000007faf74a0 type:MM_FILEPAGES val:33 [ 33.892271] BUG: Bad rss-counter state mm:000000007faf74a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16486' (ECDSA) to the list of known hosts. 2023/06/21 08:02:55 fuzzer started 2023/06/21 08:02:55 dialing manager at localhost:36067 2023/06/21 08:02:55 checking machine... 2023/06/21 08:02:55 checking revisions... [ 34.540786] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:02:55 testing simple program... [ 34.602784] cgroup: Unknown subsys name 'net' [ 34.683382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:55 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=1ffff1100d9c139a RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09ca8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8540f248 R15=0000000000000000 RIP=ffffffff8180f12f RFL=00000046 [---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=00007ffe41958d58 CR3=000000000dc4e000 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=2035353a32303a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff844b5656 RDI=ffffffff84e3a5a1 RBP=ffff888018b07c98 RSP=ffff888018b07ae0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=00000000000b6a61 R12=ffffffffffffffff R13=ffff88800c476c00 R14=dffffc0000000000 R15=ffff888018b07c98 RIP=ffffffff844b5685 RFL=00000206 [-----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 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=00007fbf71e7b328 CR3=0000000016700000 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