[ 44.813495] BUG: Bad rss-counter state mm:00000000990a91ed type:MM_FILEPAGES val:33 [ 44.814900] BUG: Bad rss-counter state mm:00000000990a91ed type:MM_ANONPAGES val:22 [ 44.972448] ================================================================== [ 44.973339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.974267] Read of size 8 at addr ffff888010216b38 by task sshd/220 [ 44.975109] [ 44.975362] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.976224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.977197] Call Trace: [ 44.977526] [ 44.977806] dump_stack_lvl+0x91/0xf0 [ 44.978294] print_report+0xcc/0x620 [ 44.978796] ? __virt_addr_valid+0x102/0x340 [ 44.979361] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.979974] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.980592] kasan_report+0xbe/0xf0 [ 44.981068] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.981685] vma_interval_tree_remove+0xc75/0xec0 [ 44.982291] vma_prepare+0xc54/0x11a0 [ 44.982786] __split_vma+0x5af/0x950 [ 44.983252] ? __pfx___split_vma+0x10/0x10 [ 44.983778] ? find_held_lock+0x2c/0x110 [ 44.984286] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.984846] ? lock_is_held_type+0x9f/0x120 [ 44.985381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.985993] ? mtree_range_walk+0x632/0x900 [ 44.986540] ? mas_walk+0x5c7/0x7c0 [ 44.987035] do_vmi_munmap+0x1f1/0x2b0 [ 44.987526] mmap_region+0x1f9/0x2660 [ 44.988013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.988526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.989260] ? __pfx_lock_acquire+0x10/0x10 [ 44.989789] ? __pfx_mmap_region+0x10/0x10 [ 44.990317] ? security_mmap_addr+0x7d/0xa0 [ 44.990862] ? get_unmapped_area+0x1f5/0x3f0 [ 44.991406] do_mmap+0x854/0xf00 [ 44.991846] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.992344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.992899] ksys_mmap_pgoff+0x3af/0x500 [ 44.993404] do_syscall_64+0x3f/0x90 [ 44.993881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.994519] RIP: 0033:0x7fb38dcf8d82 [ 44.994983] 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 [ 44.997092] RSP: 002b:00007ffcc21fb158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.998009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb38dcf8d82 [ 44.998861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb38d132000 [ 44.999699] RBP: 00007fb38d132000 R08: 0000000000000009 R09: 0000000000001000 [ 45.000533] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616b1d2cb20 [ 45.001374] R13: 00007ffcc21fb170 R14: 00007ffcc21fb1a0 R15: 00007ffcc21fb500 [ 45.002221] [ 45.002513] [ 45.002754] Allocated by task 213: [ 45.003181] kasan_save_stack+0x22/0x50 [ 45.003681] kasan_set_track+0x25/0x30 [ 45.004179] __kasan_slab_alloc+0x59/0x70 [ 45.004701] kmem_cache_alloc+0x16b/0x370 [ 45.005218] vm_area_dup+0x20/0x160 [ 45.005670] __split_vma+0x170/0x950 [ 45.006137] split_vma+0xc6/0x110 [ 45.006572] mprotect_fixup+0x8d2/0xb30 [ 45.007084] do_mprotect_pkey+0x87e/0xd40 [ 45.007595] __x64_sys_mprotect+0x78/0xc0 [ 45.008111] do_syscall_64+0x3f/0x90 [ 45.008586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.009231] [ 45.009442] Freed by task 213: [ 45.009831] kasan_save_stack+0x22/0x50 [ 45.010330] kasan_set_track+0x25/0x30 [ 45.010836] kasan_save_free_info+0x2b/0x50 [ 45.011367] __kasan_slab_free+0x10a/0x190 [ 45.011901] kmem_cache_free+0x10d/0x4d0 [ 45.012409] rcu_core+0x8c8/0x2860 [ 45.012847] __do_softirq+0x1b7/0x7d4 [ 45.013315] [ 45.013526] Last potentially related work creation: [ 45.014105] kasan_save_stack+0x22/0x50 [ 45.014623] __kasan_record_aux_stack+0x8e/0xa0 [ 45.015203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.015845] remove_vma+0x139/0x170 [ 45.016295] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.016848] do_vmi_munmap+0x1f1/0x2b0 [ 45.017325] __vm_munmap+0x138/0x3a0 [ 45.017796] __x64_sys_munmap+0x59/0x80 [ 45.018289] do_syscall_64+0x3f/0x90 [ 45.018779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.019417] [ 45.019627] Second to last potentially related work creation: [ 45.020315] kasan_save_stack+0x22/0x50 [ 45.020810] __kasan_record_aux_stack+0x8e/0xa0 [ 45.021374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.022018] remove_vma+0x139/0x170 [ 45.022462] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.023022] do_vmi_munmap+0x1f1/0x2b0 [ 45.023505] mmap_region+0x1f9/0x2660 [ 45.023980] do_mmap+0x854/0xf00 [ 45.024409] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.024890] ksys_mmap_pgoff+0x3af/0x500 [ 45.025388] do_syscall_64+0x3f/0x90 [ 45.025859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.026501] [ 45.026726] The buggy address belongs to the object at ffff888010216ae0 [ 45.026726] which belongs to the cache vm_area_struct of size 168 [ 45.028197] The buggy address is located 88 bytes inside of [ 45.028197] freed 168-byte region [ffff888010216ae0, ffff888010216b88) [ 45.029594] [ 45.029811] The buggy address belongs to the physical page: [ 45.030475] page:000000003ebb015c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10216 [ 45.031577] memcg:ffff888013fb9b01 [ 45.031996] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.032638] page_type: 0xffffffff() [ 45.033087] raw: 0100000000000200 ffff88800879fc80 ffffea00004fa8c0 dead000000000008 [ 45.033995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fb9b01 [ 45.034905] page dumped because: kasan: bad access detected [ 45.035564] [ 45.035775] Memory state around the buggy address: [ 45.036343] ffff888010216a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.037190] ffff888010216a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 45.038027] >ffff888010216b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.038896] ^ [ 45.039504] ffff888010216b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 45.040346] ffff888010216c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 45.041185] ================================================================== [ 45.042266] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 47.150052] BUG: Bad rss-counter state mm:000000008c40374c type:MM_FILEPAGES val:33 [ 47.151482] BUG: Bad rss-counter state mm:000000008c40374c type:MM_ANONPAGES val:22 [ 47.652437] BUG: Bad rss-counter state mm:00000000cad95b26 type:MM_FILEPAGES val:33 [ 47.653919] BUG: Bad rss-counter state mm:00000000cad95b26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11961' (ECDSA) to the list of known hosts. 2023/06/20 04:26:27 fuzzer started 2023/06/20 04:26:27 dialing manager at localhost:44161 2023/06/20 04:26:27 checking machine... 2023/06/20 04:26:27 checking revisions... [ 48.402650] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:26:27 testing simple program... [ 48.456109] cgroup: Unknown subsys name 'net' [ 48.538157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:26:06 Registers: info registers vcpu 0 RAX=ffff88800c3fd1c1 RBX=ffffffff85d3d00c RCX=ffffffff812be3b8 RDX=ffffed10028fbf2e RSI=0000000000000008 RDI=ffff8880147df968 RBP=ffff888015b97178 RSP=ffff8880147df930 R8 =0000000000000001 R9 =ffffed10028fbf2d R10=ffff8880147df96f R11=3830306234386136 R12=1ffff110028fbf29 R13=0000000000000001 R14=ffff88800c3fd1c0 R15=ffff888015b97180 RIP=ffffffff812be3bd 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 00007fb0521d4900 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=00007fb0516ac590 CR3=000000000caae000 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=477ee869f8eb7ae700000000000ae988 XMM05=68cd097b472c4ec200000000001354e8 XMM06=4fda316b135da52b0000000000133c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888016a39b40 RSI=ffffffff837263a5 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff88800d8ff638 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000001 R13=ffffffff87f96af0 R14=ffff888009b8a800 R15=0000000000000006 RIP=ffffffff814c07e0 RFL=00000286 [--S--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 00007f9b43f4b900 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=00007ffda3317000 CR3=0000000019ec4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000