[ 31.244197] BUG: Bad rss-counter state mm:00000000163043c3 type:MM_FILEPAGES val:33 [ 31.245420] BUG: Bad rss-counter state mm:00000000163043c3 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.370020] ================================================================== [ 31.370946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.371894] Read of size 8 at addr ffff888016850058 by task sshd/219 [ 31.372789] [ 31.373056] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.373965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.374952] Call Trace: [ 31.375292] [ 31.375584] dump_stack_lvl+0x91/0xf0 [ 31.376082] print_report+0xcc/0x620 [ 31.376572] ? __virt_addr_valid+0x102/0x340 [ 31.377161] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378419] kasan_report+0xbe/0xf0 [ 31.378904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379538] vma_interval_tree_remove+0xc75/0xec0 [ 31.380151] vma_prepare+0xc54/0x11a0 [ 31.380630] __split_vma+0x5af/0x950 [ 31.381122] ? __pfx___split_vma+0x10/0x10 [ 31.381682] ? find_held_lock+0x2c/0x110 [ 31.382214] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.382786] ? lock_is_held_type+0x9f/0x120 [ 31.383343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.383954] ? mtree_range_walk+0x632/0x900 [ 31.384508] ? mas_walk+0x5c7/0x7c0 [ 31.384988] do_vmi_munmap+0x1f1/0x2b0 [ 31.385496] mmap_region+0x1f9/0x2660 [ 31.385981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.386497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.387233] ? __pfx_lock_acquire+0x10/0x10 [ 31.387769] ? __pfx_mmap_region+0x10/0x10 [ 31.388296] ? security_mmap_addr+0x7d/0xa0 [ 31.388833] ? get_unmapped_area+0x1f5/0x3f0 [ 31.389418] do_mmap+0x854/0xf00 [ 31.389862] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.390360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.390927] ksys_mmap_pgoff+0x3af/0x500 [ 31.391433] do_syscall_64+0x3f/0x90 [ 31.391910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392571] RIP: 0033:0x7fe9e7b52d82 [ 31.393043] 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 [ 31.395190] RSP: 002b:00007fff887356c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.396120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9e7b52d82 [ 31.397004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9e6f8c000 [ 31.397909] RBP: 00007fe9e6f8c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.398800] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577f010dd90 [ 31.399692] R13: 00007fff887356e0 R14: 00007fff88735710 R15: 00007fff88735a70 [ 31.400594] [ 31.400901] [ 31.401142] Allocated by task 212: [ 31.401600] kasan_save_stack+0x22/0x50 [ 31.402129] kasan_set_track+0x25/0x30 [ 31.402642] __kasan_slab_alloc+0x59/0x70 [ 31.403187] kmem_cache_alloc+0x16b/0x370 [ 31.403731] vm_area_dup+0x20/0x160 [ 31.404208] __split_vma+0x170/0x950 [ 31.404697] split_vma+0xc6/0x110 [ 31.405147] mprotect_fixup+0x8d2/0xb30 [ 31.405646] do_mprotect_pkey+0x87e/0xd40 [ 31.406164] __x64_sys_mprotect+0x78/0xc0 [ 31.406679] do_syscall_64+0x3f/0x90 [ 31.407156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.407814] [ 31.408041] Freed by task 212: [ 31.408447] kasan_save_stack+0x22/0x50 [ 31.408980] kasan_set_track+0x25/0x30 [ 31.409521] kasan_save_free_info+0x2b/0x50 [ 31.410063] __kasan_slab_free+0x10a/0x190 [ 31.410620] kmem_cache_free+0x10d/0x4d0 [ 31.411147] rcu_core+0x8c8/0x2860 [ 31.411611] __do_softirq+0x1b7/0x7d4 [ 31.412108] [ 31.412331] Last potentially related work creation: [ 31.412940] kasan_save_stack+0x22/0x50 [ 31.413472] __kasan_record_aux_stack+0x8e/0xa0 [ 31.414092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.414773] remove_vma+0x139/0x170 [ 31.415241] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.415820] do_vmi_munmap+0x1f1/0x2b0 [ 31.416325] __vm_munmap+0x138/0x3a0 [ 31.416806] __x64_sys_munmap+0x59/0x80 [ 31.417345] do_syscall_64+0x3f/0x90 [ 31.417842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418503] [ 31.418725] The buggy address belongs to the object at ffff888016850000 [ 31.418725] which belongs to the cache vm_area_struct of size 168 [ 31.420244] The buggy address is located 88 bytes inside of [ 31.420244] freed 168-byte region [ffff888016850000, ffff8880168500a8) [ 31.421720] [ 31.421945] The buggy address belongs to the physical page: [ 31.422627] page:00000000d5280645 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16850 [ 31.423764] memcg:ffff88800d1b0701 [ 31.424204] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.424869] page_type: 0xffffffff() [ 31.425349] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.426305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1b0701 [ 31.427249] page dumped because: kasan: bad access detected [ 31.427938] [ 31.428160] Memory state around the buggy address: [ 31.428775] ffff88801684ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.429680] ffff88801684ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.430576] >ffff888016850000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.431474] ^ [ 31.432238] ffff888016850080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.433134] ffff888016850100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.434025] ================================================================== [ 31.435070] Disabling lock debugging due to kernel taint [ 33.612817] BUG: Bad rss-counter state mm:0000000055b3f276 type:MM_FILEPAGES val:33 [ 33.613824] BUG: Bad rss-counter state mm:0000000055b3f276 type:MM_ANONPAGES val:22 [ 34.107774] BUG: Bad rss-counter state mm:00000000bff08fd1 type:MM_FILEPAGES val:33 [ 34.108964] BUG: Bad rss-counter state mm:00000000bff08fd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4904' (ECDSA) to the list of known hosts. 2023/06/20 16:02:26 fuzzer started 2023/06/20 16:02:27 dialing manager at localhost:36067 2023/06/20 16:02:27 checking machine... 2023/06/20 16:02:27 checking revisions... [ 34.867350] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:02:27 testing simple program... [ 34.912327] cgroup: Unknown subsys name 'net' [ 34.953949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=00007f0cfb476fef RDX=000000000000005a RSI=00007f0cf0022990 RDI=000055f664fce760 RBP=000055f664fcae00 RSP=00007f0cfa6328f8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=000055f663764a50 R14=000000000000005a R15=000055f664fce760 RIP=00007f0cfb470f90 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0cfa633700 00000000 00000000 GS =0000 0000000000000000 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=00007fe8a2f010b0 CR3=000000000cae0000 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=2036323a32303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32303a3631203032 XMM08=3d656e696c646d632022656369767265 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=00007fa501511ee0 CR3=000000000ef06000 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=e0a84794e824a698994bd7554d0415a9 XMM02=ec2efd57dc4c00df000000000011b520 XMM03=d3b085630595d729000000000011b5f0 XMM04=68717eee50886d8600000000000ae988 XMM05=dfcdbad4f1609c370000000000131ed0 XMM06=806171799158d9670000000000131d58 XMM07=e042d86d42eb936e0000000000122630 XMM08=d3b085630595d729000000000011b5f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000