[ 24.088693] BUG: Bad rss-counter state mm:000000006c984976 type:MM_FILEPAGES val:33 [ 24.090308] BUG: Bad rss-counter state mm:000000006c984976 type:MM_ANONPAGES val:22 [ 24.244675] ================================================================== [ 24.245735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.246863] Read of size 8 at addr ffff88800ded0228 by task sshd/218 [ 24.247941] [ 24.248191] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.249012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.249939] Call Trace: [ 24.250249] [ 24.250519] dump_stack_lvl+0x91/0xf0 [ 24.250985] print_report+0xcc/0x620 [ 24.251447] ? __virt_addr_valid+0x102/0x340 [ 24.251971] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.252566] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.253148] kasan_report+0xbe/0xf0 [ 24.253605] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.254187] vma_interval_tree_remove+0xc75/0xec0 [ 24.254787] vma_prepare+0xc54/0x11a0 [ 24.255272] __split_vma+0x5af/0x950 [ 24.255742] ? __pfx___split_vma+0x10/0x10 [ 24.256262] ? find_held_lock+0x2c/0x110 [ 24.256810] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.257372] ? lock_is_held_type+0x9f/0x120 [ 24.257903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.258521] ? mtree_range_walk+0x632/0x900 [ 24.259076] ? mas_walk+0x5c7/0x7c0 [ 24.259562] do_vmi_munmap+0x1f1/0x2b0 [ 24.260050] mmap_region+0x1f9/0x2660 [ 24.260545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.261047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.261768] ? __pfx_lock_acquire+0x10/0x10 [ 24.262298] ? __pfx_mmap_region+0x10/0x10 [ 24.262828] ? security_mmap_addr+0x7d/0xa0 [ 24.263354] ? get_unmapped_area+0x1f5/0x3f0 [ 24.263891] do_mmap+0x854/0xf00 [ 24.264332] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.264822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.265387] ksys_mmap_pgoff+0x3af/0x500 [ 24.265893] do_syscall_64+0x3f/0x90 [ 24.266370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.267006] RIP: 0033:0x7f319bf02d82 [ 24.267461] 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 [ 24.269591] RSP: 002b:00007fffd27e53a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.270495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f319bf02d82 [ 24.271339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f319b33c000 [ 24.272174] RBP: 00007f319b33c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.273029] R10: 0000000000000812 R11: 0000000000000206 R12: 000055637e37cb20 [ 24.273859] R13: 00007fffd27e53c0 R14: 00007fffd27e53f0 R15: 00007fffd27e5750 [ 24.274707] [ 24.274995] [ 24.275209] Allocated by task 211: [ 24.275638] kasan_save_stack+0x22/0x50 [ 24.276141] kasan_set_track+0x25/0x30 [ 24.276647] __kasan_slab_alloc+0x59/0x70 [ 24.277166] kmem_cache_alloc+0x16b/0x370 [ 24.277680] vm_area_dup+0x20/0x160 [ 24.278124] __split_vma+0x170/0x950 [ 24.278592] split_vma+0xc6/0x110 [ 24.279023] mprotect_fixup+0x8d2/0xb30 [ 24.279522] do_mprotect_pkey+0x87e/0xd40 [ 24.280035] __x64_sys_mprotect+0x78/0xc0 [ 24.280577] do_syscall_64+0x3f/0x90 [ 24.281057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.281695] [ 24.281909] Freed by task 211: [ 24.282297] kasan_save_stack+0x22/0x50 [ 24.282807] kasan_set_track+0x25/0x30 [ 24.283294] kasan_save_free_info+0x2b/0x50 [ 24.283825] __kasan_slab_free+0x10a/0x190 [ 24.284362] kmem_cache_free+0x10d/0x4d0 [ 24.284868] rcu_core+0x8c8/0x2860 [ 24.285306] __do_softirq+0x1b7/0x7d4 [ 24.285785] [ 24.285998] Last potentially related work creation: [ 24.286587] kasan_save_stack+0x22/0x50 [ 24.287085] __kasan_record_aux_stack+0x8e/0xa0 [ 24.287652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.288294] remove_vma+0x139/0x170 [ 24.288859] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.289410] do_vmi_munmap+0x1f1/0x2b0 [ 24.289894] __vm_munmap+0x138/0x3a0 [ 24.290357] __x64_sys_munmap+0x59/0x80 [ 24.290854] do_syscall_64+0x3f/0x90 [ 24.291321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.291972] [ 24.292188] Second to last potentially related work creation: [ 24.292863] kasan_save_stack+0x22/0x50 [ 24.293357] __kasan_record_aux_stack+0x8e/0xa0 [ 24.293929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.294556] remove_vma+0x139/0x170 [ 24.295009] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.295562] do_vmi_munmap+0x1f1/0x2b0 [ 24.296041] mmap_region+0x1f9/0x2660 [ 24.296529] do_mmap+0x854/0xf00 [ 24.296957] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.297442] ksys_mmap_pgoff+0x3af/0x500 [ 24.297934] do_syscall_64+0x3f/0x90 [ 24.298411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.299051] [ 24.299263] The buggy address belongs to the object at ffff88800ded01d0 [ 24.299263] which belongs to the cache vm_area_struct of size 168 [ 24.300733] The buggy address is located 88 bytes inside of [ 24.300733] freed 168-byte region [ffff88800ded01d0, ffff88800ded0278) [ 24.302121] [ 24.302333] The buggy address belongs to the physical page: [ 24.302985] page:0000000000620ce6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded0 [ 24.304069] memcg:ffff88800dd6ed01 [ 24.304510] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.305201] page_type: 0xffffffff() [ 24.305648] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a68c0 dead000000000007 [ 24.306563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6ed01 [ 24.307450] page dumped because: kasan: bad access detected [ 24.308110] [ 24.308327] Memory state around the buggy address: [ 24.308906] ffff88800ded0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.309753] ffff88800ded0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.310601] >ffff88800ded0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.311449] ^ [ 24.312003] ffff88800ded0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.312868] ffff88800ded0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.313721] ================================================================== [ 24.314622] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.279285] BUG: Bad rss-counter state mm:0000000050a96f69 type:MM_FILEPAGES val:33 [ 26.280293] BUG: Bad rss-counter state mm:0000000050a96f69 type:MM_ANONPAGES val:22 [ 26.762727] BUG: Bad rss-counter state mm:00000000b09fd3c4 type:MM_FILEPAGES val:33 [ 26.763770] BUG: Bad rss-counter state mm:00000000b09fd3c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41069' (ECDSA) to the list of known hosts. 2023/06/21 07:10:53 fuzzer started 2023/06/21 07:10:53 dialing manager at localhost:36067 2023/06/21 07:10:53 checking machine... 2023/06/21 07:10:53 checking revisions... [ 27.433500] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:10:53 testing simple program... [ 27.483121] cgroup: Unknown subsys name 'net' [ 27.566501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861436da RDX=1ffff11001b29f49 RSI=1ffff11001b29f48 RDI=1ffff11001b29f48 RBP=ffff88800d94fa40 RSP=ffff88800d94f978 R8 =ffffffff861436de R9 =ffff88800d94fa28 R10=0000000000038001 R11=00000000000229a3 R12=ffff88800d94fa48 R13=ffff88800d94fa30 R14=ffff88800d94fe58 R15=ffff88800d94f9e8 RIP=ffffffff811310ce 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 00007fa7cb619900 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=000055c620185568 CR3=000000000cb74000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3cc7149821ab30ed00000000000ae988 XMM05=abc72882b3a9f7b50000000000134a08 XMM06=751b9502027dc0b900000000001337e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffeed471648 CR3=0000000005482000 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=00007fb04e0e1510000055a7daf4f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000