[ 30.710424] BUG: Bad rss-counter state mm:00000000808b0460 type:MM_FILEPAGES val:33 [ 30.712401] BUG: Bad rss-counter state mm:00000000808b0460 type:MM_ANONPAGES val:22 [ 30.872232] ================================================================== [ 30.873153] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.874126] Read of size 8 at addr ffff88800e9d8c20 by task sshd/218 [ 30.874923] [ 30.875145] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.876105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.877085] Call Trace: [ 30.877419] [ 30.877733] dump_stack_lvl+0x91/0xf0 [ 30.878230] print_report+0xcc/0x620 [ 30.878726] ? __virt_addr_valid+0x102/0x340 [ 30.879285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880537] kasan_report+0xbe/0xf0 [ 30.881014] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881660] vma_interval_tree_remove+0xc75/0xec0 [ 30.882267] vma_prepare+0xc54/0x11a0 [ 30.882757] __split_vma+0x5af/0x950 [ 30.883235] ? __pfx___split_vma+0x10/0x10 [ 30.883784] ? find_held_lock+0x2c/0x110 [ 30.884308] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.884891] ? lock_is_held_type+0x9f/0x120 [ 30.885445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.886093] ? mtree_range_walk+0x632/0x900 [ 30.886657] ? mas_walk+0x5c7/0x7c0 [ 30.887136] do_vmi_munmap+0x1f1/0x2b0 [ 30.887638] mmap_region+0x1f9/0x2660 [ 30.888138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.888654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.889382] ? __pfx_lock_acquire+0x10/0x10 [ 30.889943] ? __pfx_mmap_region+0x10/0x10 [ 30.890480] ? security_mmap_addr+0x7d/0xa0 [ 30.891025] ? get_unmapped_area+0x1f5/0x3f0 [ 30.891595] do_mmap+0x854/0xf00 [ 30.892048] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.892549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.893119] ksys_mmap_pgoff+0x3af/0x500 [ 30.893639] do_syscall_64+0x3f/0x90 [ 30.894125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894788] RIP: 0033:0x7f7f848d8d82 [ 30.895254] 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 [ 30.897424] RSP: 002b:00007ffe5762dea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.898365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f848d8d82 [ 30.899230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f83d12000 [ 30.900098] RBP: 00007f7f83d12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.900975] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561735958ec0 [ 30.901852] R13: 00007ffe5762dec0 R14: 00007ffe5762def0 R15: 00007ffe5762e250 [ 30.902736] [ 30.903046] [ 30.903268] Allocated by task 211: [ 30.903709] kasan_save_stack+0x22/0x50 [ 30.904230] kasan_set_track+0x25/0x30 [ 30.904727] __kasan_slab_alloc+0x59/0x70 [ 30.905269] kmem_cache_alloc+0x16b/0x370 [ 30.905795] vm_area_dup+0x20/0x160 [ 30.906230] __split_vma+0x170/0x950 [ 30.906683] split_vma+0xc6/0x110 [ 30.907113] mprotect_fixup+0x8d2/0xb30 [ 30.907591] do_mprotect_pkey+0x87e/0xd40 [ 30.908090] __x64_sys_mprotect+0x78/0xc0 [ 30.908592] do_syscall_64+0x3f/0x90 [ 30.909046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909669] [ 30.909879] Freed by task 202: [ 30.910256] kasan_save_stack+0x22/0x50 [ 30.910733] kasan_set_track+0x25/0x30 [ 30.911201] kasan_save_free_info+0x2b/0x50 [ 30.911701] __kasan_slab_free+0x10a/0x190 [ 30.912204] kmem_cache_free+0x10d/0x4d0 [ 30.912685] rcu_core+0x8c8/0x2860 [ 30.913108] __do_softirq+0x1b7/0x7d4 [ 30.913567] [ 30.913774] Last potentially related work creation: [ 30.914359] kasan_save_stack+0x22/0x50 [ 30.914879] __kasan_record_aux_stack+0x8e/0xa0 [ 30.915464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.916120] remove_vma+0x139/0x170 [ 30.916588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.917149] do_vmi_munmap+0x1f1/0x2b0 [ 30.917673] __vm_munmap+0x138/0x3a0 [ 30.918154] __x64_sys_munmap+0x59/0x80 [ 30.918670] do_syscall_64+0x3f/0x90 [ 30.919159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919813] [ 30.920026] Second to last potentially related work creation: [ 30.920712] kasan_save_stack+0x22/0x50 [ 30.921216] __kasan_record_aux_stack+0x8e/0xa0 [ 30.921799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922449] remove_vma+0x139/0x170 [ 30.922907] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923487] do_vmi_munmap+0x1f1/0x2b0 [ 30.923980] mmap_region+0x1f9/0x2660 [ 30.924477] do_mmap+0x854/0xf00 [ 30.924939] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.925436] ksys_mmap_pgoff+0x7d/0x500 [ 30.925967] do_syscall_64+0x3f/0x90 [ 30.926460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927116] [ 30.927336] The buggy address belongs to the object at ffff88800e9d8bc8 [ 30.927336] which belongs to the cache vm_area_struct of size 168 [ 30.928871] The buggy address is located 88 bytes inside of [ 30.928871] freed 168-byte region [ffff88800e9d8bc8, ffff88800e9d8c70) [ 30.930316] [ 30.930540] The buggy address belongs to the physical page: [ 30.931207] page:000000000f6e9990 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9d8 [ 30.932309] memcg:ffff88800deec201 [ 30.932749] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.933420] page_type: 0xffffffff() [ 30.933886] raw: 0100000000000200 ffff8880087a0c80 ffffea000037fe00 dead000000000002 [ 30.934832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deec201 [ 30.935759] page dumped because: kasan: bad access detected [ 30.936430] [ 30.936647] Memory state around the buggy address: [ 30.937235] ffff88800e9d8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.938132] ffff88800e9d8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.939012] >ffff88800e9d8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.939876] ^ [ 30.940423] ffff88800e9d8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.941290] ffff88800e9d8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.942148] ================================================================== [ 30.943187] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.404271] BUG: Bad rss-counter state mm:000000008b35e635 type:MM_FILEPAGES val:33 [ 32.405026] BUG: Bad rss-counter state mm:000000008b35e635 type:MM_ANONPAGES val:22 [ 32.839410] BUG: Bad rss-counter state mm:00000000aa6ef3ef type:MM_FILEPAGES val:33 [ 32.841211] BUG: Bad rss-counter state mm:00000000aa6ef3ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62342' (ECDSA) to the list of known hosts. 2023/06/20 11:07:11 fuzzer started 2023/06/20 11:07:12 dialing manager at localhost:36067 2023/06/20 11:07:12 checking machine... 2023/06/20 11:07:12 checking revisions... [ 33.573033] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:07:12 testing simple program... [ 33.631236] cgroup: Unknown subsys name 'net' [ 33.684957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:07:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800f0af408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000b0500000b05 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f2b4ede6900 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=00007ffe13186000 CR3=000000000d71e000 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=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 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=00007f4a3260ec00 CR3=000000000fc58000 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=2031313a37303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a37303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000