syzkaller login: [ 31.074900] BUG: Bad rss-counter state mm:00000000c1f52108 type:MM_FILEPAGES val:33 [ 31.076113] BUG: Bad rss-counter state mm:00000000c1f52108 type:MM_ANONPAGES val:22 [ 31.114611] ================================================================== [ 31.115666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116724] Read of size 8 at addr ffff88801672d058 by task sshd/221 [ 31.117544] [ 31.117763] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119619] Call Trace: [ 31.119940] [ 31.120225] dump_stack_lvl+0x91/0xf0 [ 31.120719] print_report+0xcc/0x620 [ 31.121211] ? __virt_addr_valid+0x102/0x340 [ 31.121778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123085] kasan_report+0xbe/0xf0 [ 31.123561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124186] vma_interval_tree_remove+0xc75/0xec0 [ 31.124806] vma_prepare+0xc54/0x11a0 [ 31.125338] __split_vma+0x5af/0x950 [ 31.125819] ? __pfx___split_vma+0x10/0x10 [ 31.126350] ? find_held_lock+0x2c/0x110 [ 31.126873] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127442] ? lock_is_held_type+0x9f/0x120 [ 31.127985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.128594] ? mtree_range_walk+0x632/0x900 [ 31.129163] ? mas_walk+0x5c7/0x7c0 [ 31.129645] do_vmi_munmap+0x1f1/0x2b0 [ 31.130141] mmap_region+0x1f9/0x2660 [ 31.130629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.131859] ? __pfx_lock_acquire+0x10/0x10 [ 31.132390] ? __pfx_mmap_region+0x10/0x10 [ 31.132942] ? security_mmap_addr+0x7d/0xa0 [ 31.133487] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134030] do_mmap+0x854/0xf00 [ 31.134470] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.134974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.135536] ksys_mmap_pgoff+0x3af/0x500 [ 31.136051] do_syscall_64+0x3f/0x90 [ 31.136533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137195] RIP: 0033:0x7f58b111dd82 [ 31.137655] 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 [ 31.139780] RSP: 002b:00007ffdbebe6b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.140700] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58b111dd82 [ 31.141576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58b0557000 [ 31.142437] RBP: 00007f58b0557000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143431] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559456675ec0 [ 31.144278] R13: 00007ffdbebe6b70 R14: 00007ffdbebe6ba0 R15: 00007ffdbebe6f00 [ 31.145158] [ 31.145459] [ 31.145673] Allocated by task 214: [ 31.146108] kasan_save_stack+0x22/0x50 [ 31.146618] kasan_set_track+0x25/0x30 [ 31.147113] __kasan_slab_alloc+0x59/0x70 [ 31.147639] kmem_cache_alloc+0x16b/0x370 [ 31.148163] vm_area_dup+0x20/0x160 [ 31.148621] __split_vma+0x170/0x950 [ 31.149102] split_vma+0xc6/0x110 [ 31.149547] mprotect_fixup+0x8d2/0xb30 [ 31.150053] do_mprotect_pkey+0x87e/0xd40 [ 31.150575] __x64_sys_mprotect+0x78/0xc0 [ 31.151101] do_syscall_64+0x3f/0x90 [ 31.151589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152241] [ 31.152457] Freed by task 214: [ 31.152850] kasan_save_stack+0x22/0x50 [ 31.153367] kasan_set_track+0x25/0x30 [ 31.153865] kasan_save_free_info+0x2b/0x50 [ 31.154392] __kasan_slab_free+0x10a/0x190 [ 31.154921] kmem_cache_free+0x10d/0x4d0 [ 31.155431] rcu_core+0x8c8/0x2860 [ 31.155879] __do_softirq+0x1b7/0x7d4 [ 31.156353] [ 31.156565] Last potentially related work creation: [ 31.157153] kasan_save_stack+0x22/0x50 [ 31.157656] __kasan_record_aux_stack+0x8e/0xa0 [ 31.158221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.158860] remove_vma+0x139/0x170 [ 31.159313] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.159867] do_vmi_munmap+0x1f1/0x2b0 [ 31.160347] __vm_munmap+0x138/0x3a0 [ 31.160813] __x64_sys_munmap+0x59/0x80 [ 31.161354] do_syscall_64+0x3f/0x90 [ 31.161823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162463] [ 31.162676] The buggy address belongs to the object at ffff88801672d000 [ 31.162676] which belongs to the cache vm_area_struct of size 168 [ 31.164124] The buggy address is located 88 bytes inside of [ 31.164124] freed 168-byte region [ffff88801672d000, ffff88801672d0a8) [ 31.165526] [ 31.165742] The buggy address belongs to the physical page: [ 31.166396] page:000000008bffba7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1672d [ 31.167474] memcg:ffff888018e1f001 [ 31.167902] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.168541] page_type: 0xffffffff() [ 31.169008] raw: 0100000000000200 ffff8880087a0c80 ffffea0000404e00 dead000000000004 [ 31.169905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e1f001 [ 31.170795] page dumped because: kasan: bad access detected [ 31.171456] [ 31.171669] Memory state around the buggy address: [ 31.172247] ffff88801672cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.173102] ffff88801672cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.173951] >ffff88801672d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.174792] ^ [ 31.175515] ffff88801672d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.176370] ffff88801672d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.177232] ================================================================== [ 31.178258] Disabling lock debugging due to kernel taint [ 32.875080] BUG: Bad rss-counter state mm:0000000088ba0479 type:MM_FILEPAGES val:33 [ 32.876051] BUG: Bad rss-counter state mm:0000000088ba0479 type:MM_ANONPAGES val:22 [ 33.351077] BUG: Bad rss-counter state mm:000000003c0a7546 type:MM_FILEPAGES val:33 [ 33.352261] BUG: Bad rss-counter state mm:000000003c0a7546 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58888' (ECDSA) to the list of known hosts. 2023/06/21 01:36:28 fuzzer started 2023/06/21 01:36:28 dialing manager at localhost:36067 2023/06/21 01:36:28 checking machine... 2023/06/21 01:36:28 checking revisions... [ 34.075272] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:36:28 testing simple program... [ 34.121461] cgroup: Unknown subsys name 'net' [ 34.165995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:28 Registers: info registers vcpu 0 RAX=1ffff11001d22543 RBX=ffff88800e9129e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e912a18 RBP=ffff88800dbd4a40 RSP=ffff88801649fd28 R8 =0000000000000001 R9 =ffffed1002c93f99 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800dbd47a0 R14=ffffffff81ef10be R15=ffff8880192b0c98 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f94e366f900 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=00007fffff205000 CR3=000000001699c000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c04400 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=00007fa4e2f0e460 CR3=000000000f340000 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=3c020ad59fd76ebd9b4bf96776ed1792 XMM02=2c67c8bc2e329bc3000000000011b2e8 XMM03=fb795ef6d65770560000000000122090 XMM04=b47a58ed6ee9a02c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131e68 XMM06=5c1ecffdaa83be850000000000130cd0 XMM07=e042d86d42eb936e0000000000122310 XMM08=a67537f5d1209beb000000000011b348 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000