syzkaller login: [ 32.257365] BUG: Bad rss-counter state mm:000000006e503116 type:MM_FILEPAGES val:33 [ 32.259276] BUG: Bad rss-counter state mm:000000006e503116 type:MM_ANONPAGES val:22 [ 32.433052] ================================================================== [ 32.433979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.434927] Read of size 8 at addr ffff88801682b058 by task sshd/221 [ 32.435705] [ 32.435926] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.436914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.438030] Call Trace: [ 32.438354] [ 32.438645] dump_stack_lvl+0x91/0xf0 [ 32.439142] print_report+0xcc/0x620 [ 32.439649] ? __virt_addr_valid+0x102/0x340 [ 32.440217] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.440846] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.441499] kasan_report+0xbe/0xf0 [ 32.441987] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.442623] vma_interval_tree_remove+0xc75/0xec0 [ 32.443226] vma_prepare+0xc54/0x11a0 [ 32.443716] __split_vma+0x5af/0x950 [ 32.444196] ? __pfx___split_vma+0x10/0x10 [ 32.444741] ? find_held_lock+0x2c/0x110 [ 32.445270] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.445882] ? lock_is_held_type+0x9f/0x120 [ 32.446451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.447065] ? mtree_range_walk+0x632/0x900 [ 32.447624] ? mas_walk+0x5c7/0x7c0 [ 32.448104] do_vmi_munmap+0x1f1/0x2b0 [ 32.448601] mmap_region+0x1f9/0x2660 [ 32.449087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.449619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.450350] ? __pfx_lock_acquire+0x10/0x10 [ 32.450889] ? __pfx_mmap_region+0x10/0x10 [ 32.451426] ? security_mmap_addr+0x7d/0xa0 [ 32.451972] ? get_unmapped_area+0x1f5/0x3f0 [ 32.452529] do_mmap+0x854/0xf00 [ 32.452976] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.453494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.454068] ksys_mmap_pgoff+0x3af/0x500 [ 32.454586] do_syscall_64+0x3f/0x90 [ 32.455074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.455736] RIP: 0033:0x7fb19a70fd82 [ 32.456202] 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 [ 32.458374] RSP: 002b:00007ffeeb3fc9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.459295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb19a70fd82 [ 32.460155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb199b49000 [ 32.461026] RBP: 00007fb199b49000 R08: 0000000000000009 R09: 0000000000001000 [ 32.461905] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b796bb1f60 [ 32.462769] R13: 00007ffeeb3fc9f0 R14: 00007ffeeb3fca20 R15: 00007ffeeb3fcd80 [ 32.463651] [ 32.463947] [ 32.464162] Allocated by task 214: [ 32.464598] kasan_save_stack+0x22/0x50 [ 32.465114] kasan_set_track+0x25/0x30 [ 32.465636] __kasan_slab_alloc+0x59/0x70 [ 32.466164] kmem_cache_alloc+0x16b/0x370 [ 32.466690] vm_area_dup+0x20/0x160 [ 32.467151] __split_vma+0x170/0x950 [ 32.467623] split_vma+0xc6/0x110 [ 32.468065] mprotect_fixup+0x8d2/0xb30 [ 32.468575] do_mprotect_pkey+0x87e/0xd40 [ 32.469104] __x64_sys_mprotect+0x78/0xc0 [ 32.469645] do_syscall_64+0x3f/0x90 [ 32.470116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.470771] [ 32.470993] Freed by task 204: [ 32.471391] kasan_save_stack+0x22/0x50 [ 32.471898] kasan_set_track+0x25/0x30 [ 32.472398] kasan_save_free_info+0x2b/0x50 [ 32.472944] __kasan_slab_free+0x10a/0x190 [ 32.473508] kmem_cache_free+0x10d/0x4d0 [ 32.474024] rcu_core+0x8c8/0x2860 [ 32.474480] __do_softirq+0x1b7/0x7d4 [ 32.474963] [ 32.475183] Last potentially related work creation: [ 32.475785] kasan_save_stack+0x22/0x50 [ 32.476292] __kasan_record_aux_stack+0x8e/0xa0 [ 32.476878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.477546] remove_vma+0x139/0x170 [ 32.478008] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.478570] do_vmi_munmap+0x1f1/0x2b0 [ 32.479187] __vm_munmap+0x138/0x3a0 [ 32.479659] __x64_sys_munmap+0x59/0x80 [ 32.480165] do_syscall_64+0x3f/0x90 [ 32.480647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.481320] [ 32.481551] The buggy address belongs to the object at ffff88801682b000 [ 32.481551] which belongs to the cache vm_area_struct of size 168 [ 32.483124] The buggy address is located 88 bytes inside of [ 32.483124] freed 168-byte region [ffff88801682b000, ffff88801682b0a8) [ 32.484554] [ 32.484768] The buggy address belongs to the physical page: [ 32.485439] page:0000000078898676 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1682b [ 32.486571] memcg:ffff8880190a1301 [ 32.487002] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.487670] page_type: 0xffffffff() [ 32.488134] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.489085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880190a1301 [ 32.490038] page dumped because: kasan: bad access detected [ 32.490722] [ 32.490938] Memory state around the buggy address: [ 32.491533] ffff88801682af00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.492427] ffff88801682af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.493306] >ffff88801682b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.494235] ^ [ 32.494964] ffff88801682b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.495828] ffff88801682b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.496682] ================================================================== [ 32.497786] Disabling lock debugging due to kernel taint [ 34.512793] BUG: Bad rss-counter state mm:0000000018d65c51 type:MM_FILEPAGES val:33 [ 34.513889] BUG: Bad rss-counter state mm:0000000018d65c51 type:MM_ANONPAGES val:22 [ 34.982647] BUG: Bad rss-counter state mm:00000000319129e5 type:MM_FILEPAGES val:33 [ 34.983346] BUG: Bad rss-counter state mm:00000000319129e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38024' (ECDSA) to the list of known hosts. 2023/06/20 07:16:38 fuzzer started 2023/06/20 07:16:38 dialing manager at localhost:44161 2023/06/20 07:16:38 checking machine... 2023/06/20 07:16:38 checking revisions... [ 35.696346] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:16:38 testing simple program... [ 35.751783] cgroup: Unknown subsys name 'net' [ 35.810523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:36 Registers: info registers vcpu 0 RAX=1ffff110026ed239 RBX=ffff888013769198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880137691c8 RBP=ffff8880134905c8 RSP=ffff888016527d18 R8 =0000000000000001 R9 =ffffed1002ca4f97 R10=0000000000000003 R11=0000000000000001 R12=dffffc0000000000 R13=ffff88801a0bb300 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff81846362 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 00007fa5c6bab900 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=00007ffec2b8a000 CR3=000000000c4e6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=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=00007f08167d5028 CR3=000000000c6e0000 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=8e82d4a78b4e59947144e35b6ca2c8bf XMM02=000000000011bb10ec2efd57dc4c00df XMM03=0000000000123670d000b50d745ecceb XMM04=495a93b41f64357d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133210 XMM06=a7e5b1e56f2b75da0000000000131910 XMM07=e042d86d42eb936e00000000001238f0 XMM08=d000b50d745ecceb000000000011bb70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000