syzkaller login: [ 29.800423] BUG: Bad rss-counter state mm:00000000625df7a7 type:MM_FILEPAGES val:33 [ 29.801506] BUG: Bad rss-counter state mm:00000000625df7a7 type:MM_ANONPAGES val:22 [ 29.968052] ================================================================== [ 29.968944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.969872] Read of size 8 at addr ffff888016c57a50 by task sshd/221 [ 29.970623] [ 29.970839] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.971797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.972765] Call Trace: [ 29.973084] [ 29.973374] dump_stack_lvl+0x91/0xf0 [ 29.973865] print_report+0xcc/0x620 [ 29.974351] ? __virt_addr_valid+0x102/0x340 [ 29.974918] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.975539] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.976149] kasan_report+0xbe/0xf0 [ 29.976620] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.977237] vma_interval_tree_remove+0xc75/0xec0 [ 29.977860] vma_prepare+0xc54/0x11a0 [ 29.978339] __split_vma+0x5af/0x950 [ 29.978822] ? __pfx___split_vma+0x10/0x10 [ 29.979382] ? find_held_lock+0x2c/0x110 [ 29.979914] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.980455] ? lock_is_held_type+0x9f/0x120 [ 29.980965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.981567] ? mtree_range_walk+0x632/0x900 [ 29.982114] ? mas_walk+0x5c7/0x7c0 [ 29.982593] do_vmi_munmap+0x1f1/0x2b0 [ 29.983110] mmap_region+0x1f9/0x2660 [ 29.983568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.984068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.984809] ? __pfx_lock_acquire+0x10/0x10 [ 29.985332] ? __pfx_mmap_region+0x10/0x10 [ 29.985930] ? security_mmap_addr+0x7d/0xa0 [ 29.986454] ? get_unmapped_area+0x1f5/0x3f0 [ 29.987000] do_mmap+0x854/0xf00 [ 29.987439] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.987920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.988467] ksys_mmap_pgoff+0x3af/0x500 [ 29.988962] do_syscall_64+0x3f/0x90 [ 29.989435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.990065] RIP: 0033:0x7f29f3160d82 [ 29.990507] 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 [ 29.992605] RSP: 002b:00007ffc5aa90eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.993495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29f3160d82 [ 29.994343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29f259a000 [ 29.995200] RBP: 00007f29f259a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.996041] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d541d6d90 [ 29.996881] R13: 00007ffc5aa90ed0 R14: 00007ffc5aa90f00 R15: 00007ffc5aa91260 [ 29.997733] [ 29.998019] [ 29.998227] Allocated by task 214: [ 29.998649] kasan_save_stack+0x22/0x50 [ 29.999156] kasan_set_track+0x25/0x30 [ 29.999634] __kasan_slab_alloc+0x59/0x70 [ 30.000157] kmem_cache_alloc+0x16b/0x370 [ 30.000714] vm_area_dup+0x20/0x160 [ 30.001165] __split_vma+0x170/0x950 [ 30.001661] split_vma+0xc6/0x110 [ 30.002130] mprotect_fixup+0x8d2/0xb30 [ 30.002628] do_mprotect_pkey+0x87e/0xd40 [ 30.003163] __x64_sys_mprotect+0x78/0xc0 [ 30.003690] do_syscall_64+0x3f/0x90 [ 30.004152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.004789] [ 30.005003] Freed by task 214: [ 30.005388] kasan_save_stack+0x22/0x50 [ 30.005883] kasan_set_track+0x25/0x30 [ 30.006371] kasan_save_free_info+0x2b/0x50 [ 30.006898] __kasan_slab_free+0x10a/0x190 [ 30.007428] kmem_cache_free+0x10d/0x4d0 [ 30.007927] rcu_core+0x8c8/0x2860 [ 30.008368] __do_softirq+0x1b7/0x7d4 [ 30.008841] [ 30.009055] Last potentially related work creation: [ 30.009663] kasan_save_stack+0x22/0x50 [ 30.010167] __kasan_record_aux_stack+0x8e/0xa0 [ 30.010796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.011480] remove_vma+0x139/0x170 [ 30.011919] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.012494] do_vmi_munmap+0x1f1/0x2b0 [ 30.013015] __vm_munmap+0x138/0x3a0 [ 30.013479] __x64_sys_munmap+0x59/0x80 [ 30.014043] do_syscall_64+0x3f/0x90 [ 30.014506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.015151] [ 30.015364] The buggy address belongs to the object at ffff888016c579f8 [ 30.015364] which belongs to the cache vm_area_struct of size 168 [ 30.016826] The buggy address is located 88 bytes inside of [ 30.016826] freed 168-byte region [ffff888016c579f8, ffff888016c57aa0) [ 30.018259] [ 30.018469] The buggy address belongs to the physical page: [ 30.019209] page:000000003327b465 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c57 [ 30.020301] memcg:ffff888016f4fd01 [ 30.020716] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.021349] page_type: 0xffffffff() [ 30.021842] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.022802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f4fd01 [ 30.023725] page dumped because: kasan: bad access detected [ 30.024385] [ 30.024593] Memory state around the buggy address: [ 30.025186] ffff888016c57900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.026116] ffff888016c57980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.026972] >ffff888016c57a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.027831] ^ [ 30.028553] ffff888016c57a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.029423] ffff888016c57b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.030281] ================================================================== [ 30.031201] Disabling lock debugging due to kernel taint [ 32.378370] BUG: Bad rss-counter state mm:0000000022684596 type:MM_FILEPAGES val:33 [ 32.379393] BUG: Bad rss-counter state mm:0000000022684596 type:MM_ANONPAGES val:22 [ 32.934766] BUG: Bad rss-counter state mm:00000000f319d91e type:MM_FILEPAGES val:33 [ 32.935797] BUG: Bad rss-counter state mm:00000000f319d91e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41084' (ECDSA) to the list of known hosts. 2023/06/20 17:43:15 fuzzer started 2023/06/20 17:43:15 dialing manager at localhost:36067 2023/06/20 17:43:15 checking machine... 2023/06/20 17:43:15 checking revisions... [ 33.601982] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:43:15 testing simple program... [ 33.655910] cgroup: Unknown subsys name 'net' [ 33.691149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:43:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880165878d8 RCX=ffffffff8608a556 RDX=1ffff11002cb0f1b RSI=ffff888016587970 RDI=ffff8880165878d8 RBP=ffff888016587970 RSP=ffff8880165877e0 R8 =0000000000000001 R9 =ffff888016587918 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff888016587920 R14=ffff888016587970 R15=ffff8880165878d8 RIP=ffffffff81130416 RFL=00000282 [--S----] 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 00007f9282378900 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=00007f92829300b0 CR3=000000000daaa000 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=33343a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323839 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=ffffffff864b2f3e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2f42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000019 R15=ffff88806cf09a98 RIP=ffffffff81130b17 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 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=00007f459d9ac8f0 CR3=000000000cbe2000 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=f8f39b63067a7098f043ceb1590f24be XMM02=ec2efd57dc4c00df000000000011a590 XMM03=7c81e4ba71b18dc8000000000011a660 XMM04=97ec9cd4faa3579600000000000ae988 XMM05=dd45bfb544932d480000000000131c60 XMM06=c291bd5c70af25b90000000000130d18 XMM07=e042d86d42eb936e0000000000121550 XMM08=7c81e4ba71b18dc8000000000011a660 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000