[ 39.023991] BUG: Bad rss-counter state mm:000000007235c8fd type:MM_FILEPAGES val:33 [ 39.025081] BUG: Bad rss-counter state mm:000000007235c8fd type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.173588] ================================================================== [ 39.174549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.175530] Read of size 8 at addr ffff88800e00e5c8 by task sshd/218 [ 39.176337] [ 39.176564] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.177644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.178663] Call Trace: [ 39.179002] [ 39.179333] dump_stack_lvl+0x91/0xf0 [ 39.179835] print_report+0xcc/0x620 [ 39.180341] ? __virt_addr_valid+0x102/0x340 [ 39.180914] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.181565] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.182222] kasan_report+0xbe/0xf0 [ 39.182707] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.183351] vma_interval_tree_remove+0xc75/0xec0 [ 39.183977] vma_prepare+0xc54/0x11a0 [ 39.184474] __split_vma+0x5af/0x950 [ 39.184965] ? __pfx___split_vma+0x10/0x10 [ 39.185517] ? find_held_lock+0x2c/0x110 [ 39.186077] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.186662] ? lock_is_held_type+0x9f/0x120 [ 39.187225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.187864] ? mtree_range_walk+0x632/0x900 [ 39.188435] ? mas_walk+0x5c7/0x7c0 [ 39.188926] do_vmi_munmap+0x1f1/0x2b0 [ 39.189432] mmap_region+0x1f9/0x2660 [ 39.189959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.190491] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.191236] ? __pfx_lock_acquire+0x10/0x10 [ 39.191790] ? __pfx_mmap_region+0x10/0x10 [ 39.192335] ? security_mmap_addr+0x7d/0xa0 [ 39.192885] ? get_unmapped_area+0x1f5/0x3f0 [ 39.193452] do_mmap+0x854/0xf00 [ 39.193927] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.194444] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.195027] ksys_mmap_pgoff+0x3af/0x500 [ 39.195563] do_syscall_64+0x3f/0x90 [ 39.196069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.196739] RIP: 0033:0x7fa494fb2d82 [ 39.197211] 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 [ 39.199435] RSP: 002b:00007fffbb755988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.200376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa494fb2d82 [ 39.201259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4943ec000 [ 39.202145] RBP: 00007fa4943ec000 R08: 0000000000000009 R09: 0000000000001000 [ 39.202995] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580fb190980 [ 39.203842] R13: 00007fffbb7559a0 R14: 00007fffbb7559d0 R15: 00007fffbb755d30 [ 39.204706] [ 39.205014] [ 39.205227] Allocated by task 211: [ 39.205660] kasan_save_stack+0x22/0x50 [ 39.206210] kasan_set_track+0x25/0x30 [ 39.206705] __kasan_slab_alloc+0x59/0x70 [ 39.207240] kmem_cache_alloc+0x16b/0x370 [ 39.207766] vm_area_dup+0x20/0x160 [ 39.208235] __split_vma+0x170/0x950 [ 39.208700] split_vma+0xc6/0x110 [ 39.209137] mprotect_fixup+0x8d2/0xb30 [ 39.209639] do_mprotect_pkey+0x87e/0xd40 [ 39.210176] __x64_sys_mprotect+0x78/0xc0 [ 39.210705] do_syscall_64+0x3f/0x90 [ 39.211194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.211842] [ 39.212057] Freed by task 211: [ 39.212447] kasan_save_stack+0x22/0x50 [ 39.212947] kasan_set_track+0x25/0x30 [ 39.213438] kasan_save_free_info+0x2b/0x50 [ 39.213985] __kasan_slab_free+0x10a/0x190 [ 39.214517] kmem_cache_free+0x10d/0x4d0 [ 39.215029] rcu_core+0x8c8/0x2860 [ 39.215470] __do_softirq+0x1b7/0x7d4 [ 39.215947] [ 39.216166] Last potentially related work creation: [ 39.216749] kasan_save_stack+0x22/0x50 [ 39.217248] __kasan_record_aux_stack+0x8e/0xa0 [ 39.217830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.218628] remove_vma+0x139/0x170 [ 39.219084] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.219646] do_vmi_munmap+0x1f1/0x2b0 [ 39.220133] __vm_munmap+0x138/0x3a0 [ 39.220601] __x64_sys_munmap+0x59/0x80 [ 39.221097] do_syscall_64+0x3f/0x90 [ 39.221572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.222226] [ 39.222442] The buggy address belongs to the object at ffff88800e00e570 [ 39.222442] which belongs to the cache vm_area_struct of size 168 [ 39.223916] The buggy address is located 88 bytes inside of [ 39.223916] freed 168-byte region [ffff88800e00e570, ffff88800e00e618) [ 39.225315] [ 39.225530] The buggy address belongs to the physical page: [ 39.226196] page:000000007baf4185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe00e [ 39.227293] memcg:ffff88800e056b01 [ 39.227723] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.228422] page_type: 0xffffffff() [ 39.228870] raw: 0100000000000200 ffff88800879fc80 ffffea000038da00 dead000000000007 [ 39.229814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e056b01 [ 39.230724] page dumped because: kasan: bad access detected [ 39.231377] [ 39.231592] Memory state around the buggy address: [ 39.232186] ffff88800e00e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.233046] ffff88800e00e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.233910] >ffff88800e00e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.234757] ^ [ 39.235424] ffff88800e00e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.236276] ffff88800e00e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.237122] ================================================================== [ 39.238045] Disabling lock debugging due to kernel taint [ 41.474539] BUG: Bad rss-counter state mm:00000000a47d7844 type:MM_FILEPAGES val:33 [ 41.475655] BUG: Bad rss-counter state mm:00000000a47d7844 type:MM_ANONPAGES val:22 [ 41.890891] BUG: Bad rss-counter state mm:0000000088e2a23a type:MM_FILEPAGES val:33 [ 41.891805] BUG: Bad rss-counter state mm:0000000088e2a23a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13216' (ECDSA) to the list of known hosts. 2023/06/19 17:23:06 fuzzer started 2023/06/19 17:23:06 dialing manager at localhost:44161 2023/06/19 17:23:06 checking machine... 2023/06/19 17:23:06 checking revisions... [ 42.608313] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:23:06 testing simple program... [ 42.659871] cgroup: Unknown subsys name 'net' [ 42.712445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:22:50 Registers: info registers vcpu 0 RAX=ffffffff8180ae86 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003015e8d RSI=ffffffff8180ae86 RDI=ffff8880180af4d8 RBP=ffff8880180af4a8 RSP=ffff8880180af408 R8 =0000000000000001 R9 =ffff8880180af450 R10=0000000000038001 R11=0000000000021ee6 R12=ffff8880180af4d8 R13=0000000000000000 R14=ffff888016c59b40 R15=ffff88800e3cabe0 RIP=ffffffff813ad420 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 00007f599f801900 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=00007f599fdb8618 CR3=000000000d062000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f8a11fa9150 CR3=000000000ca60000 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=053611639ff71e95f7434a59c853da46 XMM02=000000000011c410ec2efd57dc4c00df XMM03=0000000000122e583f4995553aeecd04 XMM04=ef04fbeb09ba6c7600000000000ae988 XMM05=f7f25e09598279a50000000000133bc0 XMM06=bdf2e299e47b49d50000000000132620 XMM07=e042d86d42eb936e00000000001230d8 XMM08=3f4995553aeecd04000000000011c470 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000