Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.952236] BUG: Bad rss-counter state mm:00000000f47a4c1a type:MM_FILEPAGES val:33 [ 32.953886] BUG: Bad rss-counter state mm:00000000f47a4c1a type:MM_ANONPAGES val:22 [ 33.125414] ================================================================== [ 33.126536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.127625] Read of size 8 at addr ffff88800e473968 by task sshd/218 [ 33.128617] [ 33.128851] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.129769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.130827] Call Trace: [ 33.131170] [ 33.131471] dump_stack_lvl+0x91/0xf0 [ 33.131992] print_report+0xcc/0x620 [ 33.132506] ? __virt_addr_valid+0x102/0x340 [ 33.133093] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.133754] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.134410] kasan_report+0xbe/0xf0 [ 33.134936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.135603] vma_interval_tree_remove+0xc75/0xec0 [ 33.136245] vma_prepare+0xc54/0x11a0 [ 33.136765] __split_vma+0x5af/0x950 [ 33.137267] ? __pfx___split_vma+0x10/0x10 [ 33.137830] ? find_held_lock+0x2c/0x110 [ 33.138388] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.139007] ? lock_is_held_type+0x9f/0x120 [ 33.139586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.140239] ? mtree_range_walk+0x632/0x900 [ 33.140825] ? mas_walk+0x5c7/0x7c0 [ 33.141330] do_vmi_munmap+0x1f1/0x2b0 [ 33.141858] mmap_region+0x1f9/0x2660 [ 33.142373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.142929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.143685] ? __pfx_lock_acquire+0x10/0x10 [ 33.144249] ? __pfx_mmap_region+0x10/0x10 [ 33.144811] ? security_mmap_addr+0x7d/0xa0 [ 33.145377] ? get_unmapped_area+0x1f5/0x3f0 [ 33.145961] do_mmap+0x854/0xf00 [ 33.146426] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.146984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.147578] ksys_mmap_pgoff+0x3af/0x500 [ 33.148118] do_syscall_64+0x3f/0x90 [ 33.148625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.149315] RIP: 0033:0x7f6dbe341d82 [ 33.149810] 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 [ 33.152083] RSP: 002b:00007ffc443e8608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.153046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dbe341d82 [ 33.153949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dbd77b000 [ 33.154869] RBP: 00007f6dbd77b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.155777] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589e0885b20 [ 33.156684] R13: 00007ffc443e8620 R14: 00007ffc443e8650 R15: 00007ffc443e89b0 [ 33.157604] [ 33.157918] [ 33.158151] Allocated by task 211: [ 33.158617] kasan_save_stack+0x22/0x50 [ 33.159176] kasan_set_track+0x25/0x30 [ 33.159700] __kasan_slab_alloc+0x59/0x70 [ 33.160264] kmem_cache_alloc+0x16b/0x370 [ 33.160817] vm_area_dup+0x20/0x160 [ 33.161298] __split_vma+0x170/0x950 [ 33.161804] split_vma+0xc6/0x110 [ 33.162281] mprotect_fixup+0x8d2/0xb30 [ 33.162831] do_mprotect_pkey+0x87e/0xd40 [ 33.163394] __x64_sys_mprotect+0x78/0xc0 [ 33.163959] do_syscall_64+0x3f/0x90 [ 33.164468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.165152] [ 33.165384] Freed by task 30: [ 33.165794] kasan_save_stack+0x22/0x50 [ 33.166330] kasan_set_track+0x25/0x30 [ 33.166868] kasan_save_free_info+0x2b/0x50 [ 33.167442] __kasan_slab_free+0x10a/0x190 [ 33.168013] kmem_cache_free+0x10d/0x4d0 [ 33.168552] rcu_core+0x8c8/0x2860 [ 33.169090] __do_softirq+0x1b7/0x7d4 [ 33.169609] [ 33.169843] Last potentially related work creation: [ 33.170495] kasan_save_stack+0x22/0x50 [ 33.171046] __kasan_record_aux_stack+0x8e/0xa0 [ 33.171676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.172380] remove_vma+0x139/0x170 [ 33.172872] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.173480] do_vmi_munmap+0x1f1/0x2b0 [ 33.174017] __vm_munmap+0x138/0x3a0 [ 33.174543] __x64_sys_munmap+0x59/0x80 [ 33.175086] do_syscall_64+0x3f/0x90 [ 33.175608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.176311] [ 33.176547] Second to last potentially related work creation: [ 33.177295] kasan_save_stack+0x22/0x50 [ 33.177851] __kasan_record_aux_stack+0x8e/0xa0 [ 33.178487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.179199] remove_vma+0x139/0x170 [ 33.179698] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.180306] do_vmi_munmap+0x1f1/0x2b0 [ 33.180833] mmap_region+0x1f9/0x2660 [ 33.181360] do_mmap+0x854/0xf00 [ 33.181830] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.182372] ksys_mmap_pgoff+0x3af/0x500 [ 33.182944] do_syscall_64+0x3f/0x90 [ 33.183462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.184160] [ 33.184399] The buggy address belongs to the object at ffff88800e473910 [ 33.184399] which belongs to the cache vm_area_struct of size 168 [ 33.186025] The buggy address is located 88 bytes inside of [ 33.186025] freed 168-byte region [ffff88800e473910, ffff88800e4739b8) [ 33.187575] [ 33.187810] The buggy address belongs to the physical page: [ 33.188536] page:00000000d3049036 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe473 [ 33.189714] memcg:ffff88800e9d3e01 [ 33.190184] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.190966] page_type: 0xffffffff() [ 33.191464] raw: 0100000000000200 ffff88800879fc80 ffffea00003accc0 dead000000000005 [ 33.192470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d3e01 [ 33.193464] page dumped because: kasan: bad access detected [ 33.194190] [ 33.194424] Memory state around the buggy address: [ 33.195070] ffff88800e473800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.196010] ffff88800e473880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.196960] >ffff88800e473900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.197904] ^ [ 33.198774] ffff88800e473980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.199723] ffff88800e473a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.200654] ================================================================== [ 33.201725] Disabling lock debugging due to kernel taint [ 35.312971] BUG: Bad rss-counter state mm:0000000089ef5110 type:MM_FILEPAGES val:33 [ 35.314381] BUG: Bad rss-counter state mm:0000000089ef5110 type:MM_ANONPAGES val:22 [ 35.895609] BUG: Bad rss-counter state mm:000000001370833c type:MM_FILEPAGES val:33 [ 35.896978] BUG: Bad rss-counter state mm:000000001370833c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62267' (ECDSA) to the list of known hosts. 2023/06/20 00:53:19 fuzzer started 2023/06/20 00:53:20 dialing manager at localhost:44161 2023/06/20 00:53:20 checking machine... 2023/06/20 00:53:20 checking revisions... [ 36.616620] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:53:20 testing simple program... [ 36.666536] cgroup: Unknown subsys name 'net' [ 36.702355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:10 Registers: info registers vcpu 0 RAX=1ffffffff0c823cf RBX=0000000000000001 RCX=ffffffff86411e7c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86411e7e RBP=ffff88800f0af5d8 RSP=ffff88800f0af510 R8 =ffffffff86411e80 R9 =ffff88800f0af5c0 R10=0000000000038001 R11=000000000009a9c8 R12=ffff88800f0af5e0 R13=ffff88800f0af5c8 R14=ffff88800f0afb20 R15=ffff88800f0af580 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007ff5da81d700 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=00007fdcdff24000 CR3=000000000f5a2000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09df8 R15=ffff88806cf09a98 RIP=ffffffff81130bb0 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 00007fa32315f900 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=00007ffd4f49a000 CR3=000000000dd48000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000