syzkaller login: [ 31.503344] BUG: Bad rss-counter state mm:00000000822dfe4a type:MM_FILEPAGES val:33 [ 31.504518] BUG: Bad rss-counter state mm:00000000822dfe4a type:MM_ANONPAGES val:22 [ 31.542498] ================================================================== [ 31.543371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.544102] Read of size 8 at addr ffff88801a0d7880 by task sshd/220 [ 31.544699] [ 31.544870] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.545697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.546455] Call Trace: [ 31.546704] [ 31.546925] dump_stack_lvl+0x91/0xf0 [ 31.547301] print_report+0xcc/0x620 [ 31.547850] ? __virt_addr_valid+0x102/0x340 [ 31.548590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549388] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.550207] kasan_report+0xbe/0xf0 [ 31.550839] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.551648] vma_interval_tree_remove+0xc75/0xec0 [ 31.552438] vma_prepare+0xc54/0x11a0 [ 31.553066] __split_vma+0x5af/0x950 [ 31.553683] ? __pfx___split_vma+0x10/0x10 [ 31.554405] ? find_held_lock+0x2c/0x110 [ 31.555104] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.555850] ? lock_is_held_type+0x9f/0x120 [ 31.556570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.557370] ? mtree_range_walk+0x632/0x900 [ 31.558131] ? mas_walk+0x5c7/0x7c0 [ 31.558743] do_vmi_munmap+0x1f1/0x2b0 [ 31.559326] mmap_region+0x1f9/0x2660 [ 31.559905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.560514] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.561361] ? __pfx_lock_acquire+0x10/0x10 [ 31.562006] ? __pfx_mmap_region+0x10/0x10 [ 31.562631] ? security_mmap_addr+0x7d/0xa0 [ 31.563258] ? get_unmapped_area+0x1f5/0x3f0 [ 31.563874] do_mmap+0x854/0xf00 [ 31.564316] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.564864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.565531] ksys_mmap_pgoff+0x3af/0x500 [ 31.566137] do_syscall_64+0x3f/0x90 [ 31.566709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.567474] RIP: 0033:0x7f5c1b4abd82 [ 31.568017] 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 [ 31.570396] RSP: 002b:00007ffd665a7078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.571477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c1b4abd82 [ 31.572357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c1a8e5000 [ 31.573301] RBP: 00007f5c1a8e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.574228] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556748942d90 [ 31.575071] R13: 00007ffd665a7090 R14: 00007ffd665a70c0 R15: 00007ffd665a7420 [ 31.575926] [ 31.576217] [ 31.576433] Allocated by task 213: [ 31.576860] kasan_save_stack+0x22/0x50 [ 31.577361] kasan_set_track+0x25/0x30 [ 31.577863] __kasan_slab_alloc+0x59/0x70 [ 31.578388] kmem_cache_alloc+0x16b/0x370 [ 31.578906] vm_area_dup+0x20/0x160 [ 31.579364] __split_vma+0x170/0x950 [ 31.579841] split_vma+0xc6/0x110 [ 31.580292] mprotect_fixup+0x8d2/0xb30 [ 31.580806] do_mprotect_pkey+0x87e/0xd40 [ 31.581340] __x64_sys_mprotect+0x78/0xc0 [ 31.581887] do_syscall_64+0x3f/0x90 [ 31.582372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.583022] [ 31.583245] Freed by task 213: [ 31.583650] kasan_save_stack+0x22/0x50 [ 31.584160] kasan_set_track+0x25/0x30 [ 31.584663] kasan_save_free_info+0x2b/0x50 [ 31.585207] __kasan_slab_free+0x10a/0x190 [ 31.585770] kmem_cache_free+0x10d/0x4d0 [ 31.586280] rcu_core+0x8c8/0x2860 [ 31.586729] __do_softirq+0x1b7/0x7d4 [ 31.587258] [ 31.587522] Last potentially related work creation: [ 31.588127] kasan_save_stack+0x22/0x50 [ 31.588647] __kasan_record_aux_stack+0x8e/0xa0 [ 31.589254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.589951] remove_vma+0x139/0x170 [ 31.590408] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.590992] do_vmi_munmap+0x1f1/0x2b0 [ 31.591497] __vm_munmap+0x138/0x3a0 [ 31.591989] __x64_sys_munmap+0x59/0x80 [ 31.592503] do_syscall_64+0x3f/0x90 [ 31.592998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593644] [ 31.593881] The buggy address belongs to the object at ffff88801a0d7828 [ 31.593881] which belongs to the cache vm_area_struct of size 168 [ 31.595433] The buggy address is located 88 bytes inside of [ 31.595433] freed 168-byte region [ffff88801a0d7828, ffff88801a0d78d0) [ 31.596923] [ 31.597143] The buggy address belongs to the physical page: [ 31.597809] page:000000001f1e392d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d7 [ 31.598955] memcg:ffff88800db31f01 [ 31.599409] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.600091] page_type: 0xffffffff() [ 31.600576] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.601516] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db31f01 [ 31.602491] page dumped because: kasan: bad access detected [ 31.603211] [ 31.603439] Memory state around the buggy address: [ 31.604046] ffff88801a0d7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.604915] ffff88801a0d7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.605837] >ffff88801a0d7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.606760] ^ [ 31.607206] ffff88801a0d7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.608109] ffff88801a0d7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.608982] ================================================================== [ 31.609990] Disabling lock debugging due to kernel taint [ 33.533795] BUG: Bad rss-counter state mm:000000008d0945b3 type:MM_FILEPAGES val:33 [ 33.534867] BUG: Bad rss-counter state mm:000000008d0945b3 type:MM_ANONPAGES val:22 [ 34.006202] BUG: Bad rss-counter state mm:00000000e1143965 type:MM_FILEPAGES val:33 [ 34.007974] BUG: Bad rss-counter state mm:00000000e1143965 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55923' (ECDSA) to the list of known hosts. 2023/06/20 23:10:16 fuzzer started 2023/06/20 23:10:17 dialing manager at localhost:36067 2023/06/20 23:10:17 checking machine... 2023/06/20 23:10:17 checking revisions... [ 34.754081] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:17 testing simple program... [ 34.803094] cgroup: Unknown subsys name 'net' [ 34.846865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880095dbc80 RCX=0000000000000000 RDX=ffff888015dd9b40 RSI=ffffffff83674717 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888016767970 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880095dbcd8 R13=ffff88800904a3c0 R14=ffff888016767a88 R15=ffff8880095dbc80 RIP=ffffffff814c089b 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 00007fd842a13700 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=00007f33118f7618 CR3=000000001018e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036313a3031 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f3daae08310 CR3=0000000009a8a000 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=7e7b60c84c451d8a174fb02b3fc82b1a XMM02=ec2efd57dc4c00df000000000011a128 XMM03=441a1c0f31308da9000000000011a1f8 XMM04=b6b8c06b5af3571600000000000ae988 XMM05=19e9129bd510f2350000000000131900 XMM06=4fda316b135da52b0000000000131788 XMM07=e042d86d42eb936e0000000000121cc0 XMM08=441a1c0f31308da9000000000011a1f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000