syzkaller login: [ 29.068460] BUG: Bad rss-counter state mm:00000000c792daa8 type:MM_FILEPAGES val:33 [ 29.069647] BUG: Bad rss-counter state mm:00000000c792daa8 type:MM_ANONPAGES val:22 [ 29.232989] ================================================================== [ 29.233881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.234820] Read of size 8 at addr ffff888019c8e4e0 by task sshd/219 [ 29.235603] [ 29.235831] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.236757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.237723] Call Trace: [ 29.238042] [ 29.238345] dump_stack_lvl+0x91/0xf0 [ 29.238831] print_report+0xcc/0x620 [ 29.239328] ? __virt_addr_valid+0x102/0x340 [ 29.239884] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.240503] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.241118] kasan_report+0xbe/0xf0 [ 29.241588] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.242214] vma_interval_tree_remove+0xc75/0xec0 [ 29.242821] vma_prepare+0xc54/0x11a0 [ 29.243301] __split_vma+0x5af/0x950 [ 29.243774] ? __pfx___split_vma+0x10/0x10 [ 29.244301] ? find_held_lock+0x2c/0x110 [ 29.244817] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.245379] ? lock_is_held_type+0x9f/0x120 [ 29.245907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.246503] ? mtree_range_walk+0x632/0x900 [ 29.247055] ? mas_walk+0x5c7/0x7c0 [ 29.247546] do_vmi_munmap+0x1f1/0x2b0 [ 29.248048] mmap_region+0x1f9/0x2660 [ 29.248522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.249026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.249732] ? __pfx_lock_acquire+0x10/0x10 [ 29.250260] ? __pfx_mmap_region+0x10/0x10 [ 29.250837] ? security_mmap_addr+0x7d/0xa0 [ 29.251368] ? get_unmapped_area+0x1f5/0x3f0 [ 29.251917] do_mmap+0x854/0xf00 [ 29.252353] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.252845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.253402] ksys_mmap_pgoff+0x3af/0x500 [ 29.253904] do_syscall_64+0x3f/0x90 [ 29.254386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.255054] RIP: 0033:0x7fee2934dd82 [ 29.255531] 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 [ 29.257626] RSP: 002b:00007fff6f24b8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.258529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee2934dd82 [ 29.259411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee28787000 [ 29.260269] RBP: 00007fee28787000 R08: 0000000000000009 R09: 0000000000001000 [ 29.261108] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593783aeec0 [ 29.261951] R13: 00007fff6f24b900 R14: 00007fff6f24b930 R15: 00007fff6f24bc90 [ 29.262800] [ 29.263094] [ 29.263318] Allocated by task 212: [ 29.263748] kasan_save_stack+0x22/0x50 [ 29.264253] kasan_set_track+0x25/0x30 [ 29.264741] __kasan_slab_alloc+0x59/0x70 [ 29.265267] kmem_cache_alloc+0x16b/0x370 [ 29.265784] vm_area_dup+0x20/0x160 [ 29.266239] __split_vma+0x170/0x950 [ 29.266700] split_vma+0xc6/0x110 [ 29.267137] mprotect_fixup+0x8d2/0xb30 [ 29.267656] do_mprotect_pkey+0x87e/0xd40 [ 29.268177] __x64_sys_mprotect+0x78/0xc0 [ 29.268693] do_syscall_64+0x3f/0x90 [ 29.269160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.269801] [ 29.270014] Freed by task 212: [ 29.270408] kasan_save_stack+0x22/0x50 [ 29.270902] kasan_set_track+0x25/0x30 [ 29.271401] kasan_save_free_info+0x2b/0x50 [ 29.271939] __kasan_slab_free+0x10a/0x190 [ 29.272468] kmem_cache_free+0x10d/0x4d0 [ 29.272968] rcu_core+0x8c8/0x2860 [ 29.273409] __do_softirq+0x1b7/0x7d4 [ 29.273882] [ 29.274095] Last potentially related work creation: [ 29.274674] kasan_save_stack+0x22/0x50 [ 29.275175] __kasan_record_aux_stack+0x8e/0xa0 [ 29.275747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.276385] remove_vma+0x139/0x170 [ 29.276835] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.277390] do_vmi_munmap+0x1f1/0x2b0 [ 29.277875] __vm_munmap+0x138/0x3a0 [ 29.278342] __x64_sys_munmap+0x59/0x80 [ 29.278834] do_syscall_64+0x3f/0x90 [ 29.279319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.279963] [ 29.280177] The buggy address belongs to the object at ffff888019c8e488 [ 29.280177] which belongs to the cache vm_area_struct of size 168 [ 29.281629] The buggy address is located 88 bytes inside of [ 29.281629] freed 168-byte region [ffff888019c8e488, ffff888019c8e530) [ 29.283029] [ 29.283252] The buggy address belongs to the physical page: [ 29.283906] page:00000000b8266fe4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c8e [ 29.284998] memcg:ffff88800ca3a701 [ 29.285416] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.286050] page_type: 0xffffffff() [ 29.286494] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.287417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca3a701 [ 29.288310] page dumped because: kasan: bad access detected [ 29.288971] [ 29.289187] Memory state around the buggy address: [ 29.289765] ffff888019c8e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.290617] ffff888019c8e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.291475] >ffff888019c8e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.292320] ^ [ 29.293070] ffff888019c8e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.293930] ffff888019c8e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.294765] ================================================================== [ 29.296088] Disabling lock debugging due to kernel taint [ 31.747920] BUG: Bad rss-counter state mm:00000000f7f90b02 type:MM_FILEPAGES val:33 [ 31.749086] BUG: Bad rss-counter state mm:00000000f7f90b02 type:MM_ANONPAGES val:22 [ 32.138201] BUG: Bad rss-counter state mm:00000000a9b2f8a6 type:MM_FILEPAGES val:33 [ 32.139265] BUG: Bad rss-counter state mm:00000000a9b2f8a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62962' (ECDSA) to the list of known hosts. 2023/06/21 02:34:06 fuzzer started 2023/06/21 02:34:06 dialing manager at localhost:36067 2023/06/21 02:34:06 checking machine... 2023/06/21 02:34:06 checking revisions... [ 32.904931] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:34:07 testing simple program... [ 32.933615] cgroup: Unknown subsys name 'net' [ 32.984021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:34:06 Registers: info registers vcpu 0 RAX=fffffffffb3a0125 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff88806ce09990 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc93 RFL=00000246 [---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=00007fa666d57328 CR3=000000000e3e0000 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=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 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=ffff888008c04400 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=00007f6c03543060 CR3=000000000c892000 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=3b11c6eff3e80b92a64e3f0f7f5e5b08 XMM02=000000000011b3f0eff9b2d0a8fce9cb XMM03=000000000011b4c02c67c8bc2e329bc3 XMM04=c9041e02bd31da6d00000000000ae988 XMM05=87d16bf41200a3b00000000000132510 XMM06=806171799158d9670000000000131f08 XMM07=e042d86d42eb936e0000000000122458 XMM08=36187806bb4db36c000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000