[ 24.124366] BUG: Bad rss-counter state mm:000000001678a6de type:MM_FILEPAGES val:33 [ 24.125577] BUG: Bad rss-counter state mm:000000001678a6de type:MM_ANONPAGES val:22 [ 24.160396] ================================================================== [ 24.161487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.162421] Read of size 8 at addr ffff88801bd0b798 by task sshd/220 [ 24.163347] [ 24.163596] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.164482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.165558] Call Trace: [ 24.165887] [ 24.166215] dump_stack_lvl+0x91/0xf0 [ 24.166751] print_report+0xcc/0x620 [ 24.167375] ? __virt_addr_valid+0x102/0x340 [ 24.167995] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.168614] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.169244] kasan_report+0xbe/0xf0 [ 24.169716] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.170361] vma_interval_tree_remove+0xc75/0xec0 [ 24.170987] vma_prepare+0xc54/0x11a0 [ 24.171469] __split_vma+0x5af/0x950 [ 24.171953] ? __pfx___split_vma+0x10/0x10 [ 24.172490] ? find_held_lock+0x2c/0x110 [ 24.173021] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.173586] ? lock_is_held_type+0x9f/0x120 [ 24.174138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.174752] ? mtree_range_walk+0x632/0x900 [ 24.175335] ? mas_walk+0x5c7/0x7c0 [ 24.175810] do_vmi_munmap+0x1f1/0x2b0 [ 24.176313] mmap_region+0x1f9/0x2660 [ 24.176799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.177324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.178040] ? __pfx_lock_acquire+0x10/0x10 [ 24.178587] ? __pfx_mmap_region+0x10/0x10 [ 24.179163] ? security_mmap_addr+0x7d/0xa0 [ 24.179699] ? get_unmapped_area+0x1f5/0x3f0 [ 24.180260] do_mmap+0x854/0xf00 [ 24.180699] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.181204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.181770] ksys_mmap_pgoff+0x3af/0x500 [ 24.182299] do_syscall_64+0x3f/0x90 [ 24.182777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.183451] RIP: 0033:0x7f4121730d82 [ 24.183909] 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 [ 24.186064] RSP: 002b:00007ffef9e45fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.186993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4121730d82 [ 24.188123] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4120b6a000 [ 24.188978] RBP: 00007f4120b6a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.189832] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b4cd9cec0 [ 24.190695] R13: 00007ffef9e46000 R14: 00007ffef9e46030 R15: 00007ffef9e46390 [ 24.191573] [ 24.191871] [ 24.192084] Allocated by task 208: [ 24.192538] kasan_save_stack+0x22/0x50 [ 24.193044] kasan_set_track+0x25/0x30 [ 24.193545] __kasan_slab_alloc+0x59/0x70 [ 24.194066] kmem_cache_alloc+0x16b/0x370 [ 24.194590] vm_area_dup+0x20/0x160 [ 24.195051] __split_vma+0x170/0x950 [ 24.195526] split_vma+0xc6/0x110 [ 24.195961] mprotect_fixup+0x8d2/0xb30 [ 24.196461] do_mprotect_pkey+0x87e/0xd40 [ 24.197032] __x64_sys_mprotect+0x78/0xc0 [ 24.197575] do_syscall_64+0x3f/0x90 [ 24.198045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.198695] [ 24.198926] Freed by task 208: [ 24.199318] kasan_save_stack+0x22/0x50 [ 24.199829] kasan_set_track+0x25/0x30 [ 24.200318] kasan_save_free_info+0x2b/0x50 [ 24.200867] __kasan_slab_free+0x10a/0x190 [ 24.201399] kmem_cache_free+0x10d/0x4d0 [ 24.201918] rcu_core+0x8c8/0x2860 [ 24.202362] __do_softirq+0x1b7/0x7d4 [ 24.202862] [ 24.203077] Last potentially related work creation: [ 24.203675] kasan_save_stack+0x22/0x50 [ 24.204172] __kasan_record_aux_stack+0x8e/0xa0 [ 24.204759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.205399] remove_vma+0x139/0x170 [ 24.205858] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.206413] do_vmi_munmap+0x1f1/0x2b0 [ 24.206944] __vm_munmap+0x138/0x3a0 [ 24.207411] __x64_sys_munmap+0x59/0x80 [ 24.207917] do_syscall_64+0x3f/0x90 [ 24.208390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.209051] [ 24.209267] The buggy address belongs to the object at ffff88801bd0b740 [ 24.209267] which belongs to the cache vm_area_struct of size 168 [ 24.210732] The buggy address is located 88 bytes inside of [ 24.210732] freed 168-byte region [ffff88801bd0b740, ffff88801bd0b7e8) [ 24.212185] [ 24.212408] The buggy address belongs to the physical page: [ 24.213088] page:0000000082c32222 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bd0b [ 24.214187] memcg:ffff88801bc8af01 [ 24.214608] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.215312] page_type: 0xffffffff() [ 24.215767] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.216696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc8af01 [ 24.217612] page dumped because: kasan: bad access detected [ 24.218276] [ 24.218492] Memory state around the buggy address: [ 24.219098] ffff88801bd0b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.219958] ffff88801bd0b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.220838] >ffff88801bd0b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.221703] ^ [ 24.222199] ffff88801bd0b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.223080] ffff88801bd0b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.223941] ================================================================== [ 24.225004] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.634512] BUG: Bad rss-counter state mm:000000005df32a50 type:MM_FILEPAGES val:33 [ 26.635726] BUG: Bad rss-counter state mm:000000005df32a50 type:MM_ANONPAGES val:22 [ 26.974883] BUG: Bad rss-counter state mm:00000000056af639 type:MM_FILEPAGES val:33 [ 26.975864] BUG: Bad rss-counter state mm:00000000056af639 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21496' (ECDSA) to the list of known hosts. 2023/06/21 01:25:01 fuzzer started 2023/06/21 01:25:02 dialing manager at localhost:36067 2023/06/21 01:25:02 checking machine... 2023/06/21 01:25:02 checking revisions... [ 27.689080] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:25:02 testing simple program... [ 27.741818] cgroup: Unknown subsys name 'net' [ 27.839666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:25:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f18f99416d0 CR3=00000000097f6000 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=57285311fa073cb68f48fe994b519e89 XMM02=ec2efd57dc4c00df000000000011d090 XMM03=fb337c590c3b08d6000000000011d160 XMM04=c739f1292e683f3200000000000ae988 XMM05=19e9129bd510f23500000000001323e8 XMM06=777f21bdbe6a140500000000001315c0 XMM07=e042d86d42eb936e0000000000123270 XMM08=fb337c590c3b08d6000000000011d160 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801029ef98 RCX=0000000000000001 RDX=1ffff11002053dfe RSI=ffff88801029f3a8 RDI=ffffffff8180a924 RBP=ffff88801029eff0 RSP=ffff88801029ef80 R8 =0000000000000001 R9 =ffff88801029efd8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88801029f060 R13=0000000000000000 R14=ffff88800f7251c0 R15=0000000000092800 RIP=ffffffff811303b2 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 00007fb37d9b6900 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=00007fb37d97b008 CR3=000000000e22c000 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=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