[ 39.475210] BUG: Bad rss-counter state mm:00000000c20a6392 type:MM_FILEPAGES val:33 [ 39.477291] BUG: Bad rss-counter state mm:00000000c20a6392 type:MM_ANONPAGES val:22 [ 39.656573] ================================================================== [ 39.657600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.658618] Read of size 8 at addr ffff8880146e65c8 by task sshd/226 [ 39.659606] [ 39.659847] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.660792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.661884] Call Trace: [ 39.662236] [ 39.662551] dump_stack_lvl+0x91/0xf0 [ 39.663115] print_report+0xcc/0x620 [ 39.663646] ? __virt_addr_valid+0x102/0x340 [ 39.664257] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.664931] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.665608] kasan_report+0xbe/0xf0 [ 39.666134] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.666817] vma_interval_tree_remove+0xc75/0xec0 [ 39.667499] vma_prepare+0xc54/0x11a0 [ 39.668024] __split_vma+0x5af/0x950 [ 39.668539] ? __pfx___split_vma+0x10/0x10 [ 39.669124] ? find_held_lock+0x2c/0x110 [ 39.669692] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.670317] ? lock_is_held_type+0x9f/0x120 [ 39.670908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.671599] ? mtree_range_walk+0x632/0x900 [ 39.672202] ? mas_walk+0x5c7/0x7c0 [ 39.672729] do_vmi_munmap+0x1f1/0x2b0 [ 39.673267] mmap_region+0x1f9/0x2660 [ 39.673796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.674353] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.675155] ? __pfx_lock_acquire+0x10/0x10 [ 39.675744] ? __pfx_mmap_region+0x10/0x10 [ 39.676333] ? security_mmap_addr+0x7d/0xa0 [ 39.676909] ? get_unmapped_area+0x1f5/0x3f0 [ 39.677517] do_mmap+0x854/0xf00 [ 39.677998] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.678542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.679167] ksys_mmap_pgoff+0x3af/0x500 [ 39.679730] do_syscall_64+0x3f/0x90 [ 39.680257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.680964] RIP: 0033:0x7f418f9b7d82 [ 39.681464] 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 [ 39.683829] RSP: 002b:00007ffc46f825b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.684817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f418f9b7d82 [ 39.685745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f418edf1000 [ 39.686673] RBP: 00007f418edf1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.687646] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c3de47ec0 [ 39.688572] R13: 00007ffc46f825d0 R14: 00007ffc46f82600 R15: 00007ffc46f82960 [ 39.689514] [ 39.689842] [ 39.690079] Allocated by task 217: [ 39.690556] kasan_save_stack+0x22/0x50 [ 39.691139] kasan_set_track+0x25/0x30 [ 39.691681] __kasan_slab_alloc+0x59/0x70 [ 39.692271] kmem_cache_alloc+0x16b/0x370 [ 39.692837] vm_area_dup+0x20/0x160 [ 39.693335] __split_vma+0x170/0x950 [ 39.693853] split_vma+0xc6/0x110 [ 39.694332] mprotect_fixup+0x8d2/0xb30 [ 39.694885] do_mprotect_pkey+0x87e/0xd40 [ 39.695489] __x64_sys_mprotect+0x78/0xc0 [ 39.696087] do_syscall_64+0x3f/0x90 [ 39.696624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.697356] [ 39.697603] Freed by task 217: [ 39.698046] kasan_save_stack+0x22/0x50 [ 39.698623] kasan_set_track+0x25/0x30 [ 39.699211] kasan_save_free_info+0x2b/0x50 [ 39.699817] __kasan_slab_free+0x10a/0x190 [ 39.700426] kmem_cache_free+0x10d/0x4d0 [ 39.701010] rcu_core+0x8c8/0x2860 [ 39.701522] __do_softirq+0x1b7/0x7d4 [ 39.702068] [ 39.702313] Last potentially related work creation: [ 39.702984] kasan_save_stack+0x22/0x50 [ 39.703569] __kasan_record_aux_stack+0x8e/0xa0 [ 39.704225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.704954] remove_vma+0x139/0x170 [ 39.705475] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.706110] do_vmi_munmap+0x1f1/0x2b0 [ 39.706666] __vm_munmap+0x138/0x3a0 [ 39.707228] __x64_sys_munmap+0x59/0x80 [ 39.707794] do_syscall_64+0x3f/0x90 [ 39.708335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.709063] [ 39.709306] The buggy address belongs to the object at ffff8880146e6570 [ 39.709306] which belongs to the cache vm_area_struct of size 168 [ 39.711000] The buggy address is located 88 bytes inside of [ 39.711000] freed 168-byte region [ffff8880146e6570, ffff8880146e6618) [ 39.712624] [ 39.712869] The buggy address belongs to the physical page: [ 39.713629] page:000000009e9b7109 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146e6 [ 39.714888] memcg:ffff88800f0c6301 [ 39.715384] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.716132] page_type: 0xffffffff() [ 39.716650] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.717708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0c6301 [ 39.718754] page dumped because: kasan: bad access detected [ 39.719549] [ 39.719794] Memory state around the buggy address: [ 39.720462] ffff8880146e6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.721449] ffff8880146e6500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.722432] >ffff8880146e6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.723414] ^ [ 39.724177] ffff8880146e6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.725154] ffff8880146e6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.726128] ================================================================== [ 39.727254] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.625514] BUG: Bad rss-counter state mm:00000000ad51dc4c type:MM_FILEPAGES val:33 [ 41.626496] BUG: Bad rss-counter state mm:00000000ad51dc4c type:MM_ANONPAGES val:22 [ 42.155135] BUG: Bad rss-counter state mm:00000000eb395bad type:MM_FILEPAGES val:33 [ 42.156171] BUG: Bad rss-counter state mm:00000000eb395bad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62486' (ECDSA) to the list of known hosts. 2023/06/20 00:33:14 fuzzer started 2023/06/20 00:33:15 dialing manager at localhost:44161 2023/06/20 00:33:15 checking machine... 2023/06/20 00:33:15 checking revisions... [ 42.775199] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:33:15 testing simple program... [ 42.824279] cgroup: Unknown subsys name 'net' [ 42.902533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:33:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1002fb9ea8 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffffffff813ad420 RBP=ffff888008fce000 RSP=ffff888017dcf540 R8 =0000000000042a50 R9 =0000000000000000 R10=ffffed1001d18c78 R11=ffff88800e8c63c0 R12=0000000000000cc0 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff813ad6b0 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 00007f8e8798e900 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=00007ffe792fa000 CR3=000000000e3d4000 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=00007fd2e35c9ed0 CR3=000000000c92a000 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=c10b8a0b8662b897be4c2a33dc7f6b40 XMM02=000000000011de30eff9b2d0a8fce9cb XMM03=000000000011df002c67c8bc2e329bc3 XMM04=6328b50a3711e69200000000000ae988 XMM05=6860aeb314f8829d0000000000134110 XMM06=4cabf813d3e427d600000000001332e8 XMM07=e042d86d42eb936e0000000000124b18 XMM08=a99d4c791b0023b6000000000011df00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000