syzkaller login: [ 39.092788] BUG: Bad rss-counter state mm:000000001e93da30 type:MM_FILEPAGES val:33 [ 39.094045] BUG: Bad rss-counter state mm:000000001e93da30 type:MM_ANONPAGES val:22 [ 39.130964] ================================================================== [ 39.131893] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.132836] Read of size 8 at addr ffff8880098c2310 by task sshd/226 [ 39.133722] [ 39.133944] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.134813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.135831] Call Trace: [ 39.136157] <TASK> [ 39.136446] dump_stack_lvl+0x91/0xf0 [ 39.136939] print_report+0xcc/0x620 [ 39.137446] ? __virt_addr_valid+0x102/0x340 [ 39.137998] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.138611] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.139256] kasan_report+0xbe/0xf0 [ 39.139734] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.140354] vma_interval_tree_remove+0xc75/0xec0 [ 39.140974] vma_prepare+0xc54/0x11a0 [ 39.141475] __split_vma+0x5af/0x950 [ 39.141949] ? __pfx___split_vma+0x10/0x10 [ 39.142482] ? find_held_lock+0x2c/0x110 [ 39.143002] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.143610] ? lock_is_held_type+0x9f/0x120 [ 39.144161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.144778] ? mtree_range_walk+0x632/0x900 [ 39.145358] ? mas_walk+0x5c7/0x7c0 [ 39.145832] do_vmi_munmap+0x1f1/0x2b0 [ 39.146327] mmap_region+0x1f9/0x2660 [ 39.146814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.147367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.148084] ? __pfx_lock_acquire+0x10/0x10 [ 39.148621] ? __pfx_mmap_region+0x10/0x10 [ 39.149157] ? security_mmap_addr+0x7d/0xa0 [ 39.149705] ? get_unmapped_area+0x1f5/0x3f0 [ 39.150259] do_mmap+0x854/0xf00 [ 39.150704] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.151245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.151820] ksys_mmap_pgoff+0x3af/0x500 [ 39.152336] do_syscall_64+0x3f/0x90 [ 39.152825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.153499] RIP: 0033:0x7f0502288d82 [ 39.153966] 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 [ 39.156157] RSP: 002b:00007ffe5a28c648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.157077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0502288d82 [ 39.157974] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05016c2000 [ 39.158827] RBP: 00007f05016c2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.159732] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564caed1dec0 [ 39.160596] R13: 00007ffe5a28c660 R14: 00007ffe5a28c690 R15: 00007ffe5a28c9f0 [ 39.161492] </TASK> [ 39.161785] [ 39.162001] Allocated by task 219: [ 39.162436] kasan_save_stack+0x22/0x50 [ 39.162941] kasan_set_track+0x25/0x30 [ 39.163469] __kasan_slab_alloc+0x59/0x70 [ 39.163991] kmem_cache_alloc+0x16b/0x370 [ 39.164510] vm_area_dup+0x20/0x160 [ 39.164965] __split_vma+0x170/0x950 [ 39.165471] split_vma+0xc6/0x110 [ 39.165913] mprotect_fixup+0x8d2/0xb30 [ 39.166427] do_mprotect_pkey+0x87e/0xd40 [ 39.166960] __x64_sys_mprotect+0x78/0xc0 [ 39.167513] do_syscall_64+0x3f/0x90 [ 39.167993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.168650] [ 39.168865] Freed by task 219: [ 39.169276] kasan_save_stack+0x22/0x50 [ 39.169785] kasan_set_track+0x25/0x30 [ 39.170284] kasan_save_free_info+0x2b/0x50 [ 39.170826] __kasan_slab_free+0x10a/0x190 [ 39.171400] kmem_cache_free+0x10d/0x4d0 [ 39.171916] rcu_core+0x8c8/0x2860 [ 39.172359] __do_softirq+0x1b7/0x7d4 [ 39.172844] [ 39.173060] Last potentially related work creation: [ 39.173665] kasan_save_stack+0x22/0x50 [ 39.174169] __kasan_record_aux_stack+0x8e/0xa0 [ 39.174749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.175429] remove_vma+0x139/0x170 [ 39.175884] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.176448] do_vmi_munmap+0x1f1/0x2b0 [ 39.176935] __vm_munmap+0x138/0x3a0 [ 39.177433] __x64_sys_munmap+0x59/0x80 [ 39.177929] do_syscall_64+0x3f/0x90 [ 39.178410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.179055] [ 39.179310] Second to last potentially related work creation: [ 39.179997] kasan_save_stack+0x22/0x50 [ 39.180509] __kasan_record_aux_stack+0x8e/0xa0 [ 39.181086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.181746] remove_vma+0x139/0x170 [ 39.182199] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.182754] do_vmi_munmap+0x1f1/0x2b0 [ 39.183272] mmap_region+0x1f9/0x2660 [ 39.183756] do_mmap+0x854/0xf00 [ 39.184187] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.184672] ksys_mmap_pgoff+0x3af/0x500 [ 39.185195] do_syscall_64+0x3f/0x90 [ 39.185716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.186362] [ 39.186579] The buggy address belongs to the object at ffff8880098c22b8 [ 39.186579] which belongs to the cache vm_area_struct of size 168 [ 39.188080] The buggy address is located 88 bytes inside of [ 39.188080] freed 168-byte region [ffff8880098c22b8, ffff8880098c2360) [ 39.189589] [ 39.189815] The buggy address belongs to the physical page: [ 39.190495] page:00000000940b6204 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98c2 [ 39.191612] memcg:ffff88800dfb1301 [ 39.192036] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.192748] page_type: 0xffffffff() [ 39.193244] raw: 0100000000000200 ffff8880087a0c80 ffffea00003189c0 dead000000000005 [ 39.194198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfb1301 [ 39.195117] page dumped because: kasan: bad access detected [ 39.195798] [ 39.196018] Memory state around the buggy address: [ 39.196610] ffff8880098c2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.197540] ffff8880098c2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.198398] >ffff8880098c2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.199266] ^ [ 39.199743] ffff8880098c2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.200620] ffff8880098c2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.201531] ================================================================== [ 39.202516] Disabling lock debugging due to kernel taint [ 41.150743] BUG: Bad rss-counter state mm:00000000db0fc467 type:MM_FILEPAGES val:33 [ 41.151915] BUG: Bad rss-counter state mm:00000000db0fc467 type:MM_ANONPAGES val:22 [ 41.541635] BUG: Bad rss-counter state mm:000000000036f93a type:MM_FILEPAGES val:33 [ 41.542611] BUG: Bad rss-counter state mm:000000000036f93a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6755' (ECDSA) to the list of known hosts. 2023/06/20 12:06:51 fuzzer started 2023/06/20 12:06:52 dialing manager at localhost:36067 2023/06/20 12:06:52 checking machine... 2023/06/20 12:06:52 checking revisions... [ 42.250571] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:06:52 testing simple program... [ 42.298861] cgroup: Unknown subsys name 'net' [ 42.359468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:51 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=00007f597965d008 CR3=0000000005482000 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=00007f9e5ef51510000055f9b995c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015c50001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015c4fa01 RSI=ffff888015c4fa78 RDI=ffff88806cf09a80 RBP=ffff88806cf09ac8 RSP=ffff88806cf099e8 R8 =ffffffff861386f2 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020c51 R12=ffff88806cf09ad0 R13=ffff888015c48000 R14=ffff888015c4fa80 R15=ffff88806cf09a70 RIP=ffffffff811304d1 RFL=00000292 [--S-A--] 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 00007fc93dc01900 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=00007fe4ab16a650 CR3=000000000edd0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=08b70d6821ac829b00000000000ae988 XMM05=2555a55e9f1496ef00000000001342a0 XMM06=52b4a2ea048a60e70000000000132cd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000