syzkaller login: [ 151.129467] BUG: Bad rss-counter state mm:000000001ebceb13 type:MM_FILEPAGES val:33 [ 151.130861] BUG: Bad rss-counter state mm:000000001ebceb13 type:MM_ANONPAGES val:22 [ 151.264928] ================================================================== [ 151.265843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 151.266776] Read of size 8 at addr ffff888016d0ea50 by task sshd/219 [ 151.267553] [ 151.267834] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 151.268917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 151.269883] Call Trace: [ 151.270214] [ 151.270506] dump_stack_lvl+0x91/0xf0 [ 151.271002] print_report+0xcc/0x620 [ 151.271485] ? __virt_addr_valid+0x102/0x340 [ 151.272033] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.272648] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.273268] kasan_report+0xbe/0xf0 [ 151.273740] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.274375] vma_interval_tree_remove+0xc75/0xec0 [ 151.275033] vma_prepare+0xc54/0x11a0 [ 151.275534] __split_vma+0x5af/0x950 [ 151.276029] ? __pfx___split_vma+0x10/0x10 [ 151.276578] ? find_held_lock+0x2c/0x110 [ 151.277128] do_vmi_align_munmap+0x2ba/0x11f0 [ 151.277717] ? lock_is_held_type+0x9f/0x120 [ 151.278284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 151.278929] ? mtree_range_walk+0x632/0x900 [ 151.279512] ? mas_walk+0x5c7/0x7c0 [ 151.280007] do_vmi_munmap+0x1f1/0x2b0 [ 151.280522] mmap_region+0x1f9/0x2660 [ 151.281020] ? vm_mmap_pgoff+0x15c/0x3a0 [ 151.281550] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 151.282294] ? __pfx_lock_acquire+0x10/0x10 [ 151.282848] ? __pfx_mmap_region+0x10/0x10 [ 151.283423] ? security_mmap_addr+0x7d/0xa0 [ 151.283973] ? get_unmapped_area+0x1f5/0x3f0 [ 151.284543] do_mmap+0x854/0xf00 [ 151.285001] vm_mmap_pgoff+0x1a6/0x3a0 [ 151.285508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 151.286099] ksys_mmap_pgoff+0x3af/0x500 [ 151.286627] do_syscall_64+0x3f/0x90 [ 151.287139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.287806] RIP: 0033:0x7f84c3c88d82 [ 151.288277] 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 [ 151.290496] RSP: 002b:00007ffeabc66918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 151.291443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84c3c88d82 [ 151.292324] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84c30c2000 [ 151.293195] RBP: 00007f84c30c2000 R08: 0000000000000009 R09: 0000000000001000 [ 151.294078] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613ef1bdec0 [ 151.294967] R13: 00007ffeabc66930 R14: 00007ffeabc66960 R15: 00007ffeabc66cc0 [ 151.295859] [ 151.296165] [ 151.296382] Allocated by task 212: [ 151.296839] kasan_save_stack+0x22/0x50 [ 151.297359] kasan_set_track+0x25/0x30 [ 151.297869] __kasan_slab_alloc+0x59/0x70 [ 151.298414] kmem_cache_alloc+0x16b/0x370 [ 151.298968] vm_area_dup+0x20/0x160 [ 151.299439] __split_vma+0x170/0x950 [ 151.299924] split_vma+0xc6/0x110 [ 151.300379] mprotect_fixup+0x8d2/0xb30 [ 151.300899] do_mprotect_pkey+0x87e/0xd40 [ 151.301438] __x64_sys_mprotect+0x78/0xc0 [ 151.301980] do_syscall_64+0x3f/0x90 [ 151.302472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.303150] [ 151.303374] Freed by task 212: [ 151.303781] kasan_save_stack+0x22/0x50 [ 151.304300] kasan_set_track+0x25/0x30 [ 151.304808] kasan_save_free_info+0x2b/0x50 [ 151.305357] __kasan_slab_free+0x10a/0x190 [ 151.305910] kmem_cache_free+0x10d/0x4d0 [ 151.306440] rcu_core+0x8c8/0x2860 [ 151.306903] __do_softirq+0x1b7/0x7d4 [ 151.307418] [ 151.307637] Last potentially related work creation: [ 151.308249] kasan_save_stack+0x22/0x50 [ 151.308775] __kasan_record_aux_stack+0x8e/0xa0 [ 151.309371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 151.310040] remove_vma+0x139/0x170 [ 151.310507] do_vmi_align_munmap+0xd4a/0x11f0 [ 151.311095] do_vmi_munmap+0x1f1/0x2b0 [ 151.311599] __vm_munmap+0x138/0x3a0 [ 151.312087] __x64_sys_munmap+0x59/0x80 [ 151.312608] do_syscall_64+0x3f/0x90 [ 151.313100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.313767] [ 151.313988] The buggy address belongs to the object at ffff888016d0e9f8 [ 151.313988] which belongs to the cache vm_area_struct of size 168 [ 151.315525] The buggy address is located 88 bytes inside of [ 151.315525] freed 168-byte region [ffff888016d0e9f8, ffff888016d0eaa0) [ 151.316995] [ 151.317218] The buggy address belongs to the physical page: [ 151.317905] page:00000000cfc5a6c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d0e [ 151.319061] memcg:ffff888013ed5c01 [ 151.319505] flags: 0x100000000000200(slab|node=0|zone=1) [ 151.320173] page_type: 0xffffffff() [ 151.320637] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5e80 dead000000000004 [ 151.321633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ed5c01 [ 151.322576] page dumped because: kasan: bad access detected [ 151.323267] [ 151.323492] Memory state around the buggy address: [ 151.324094] ffff888016d0e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 151.324980] ffff888016d0e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 151.325867] >ffff888016d0ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 151.326744] ^ [ 151.327467] ffff888016d0ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 151.328356] ffff888016d0eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 151.329242] ================================================================== [ 151.330588] Disabling lock debugging due to kernel taint [ 153.590361] BUG: Bad rss-counter state mm:00000000982ec883 type:MM_FILEPAGES val:33 [ 153.591667] BUG: Bad rss-counter state mm:00000000982ec883 type:MM_ANONPAGES val:22 [ 154.066623] BUG: Bad rss-counter state mm:000000009755a91f type:MM_FILEPAGES val:33 [ 154.068241] BUG: Bad rss-counter state mm:000000009755a91f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23684' (ECDSA) to the list of known hosts. 2023/06/19 22:33:15 fuzzer started 2023/06/19 22:33:16 dialing manager at localhost:44161 2023/06/19 22:33:16 checking machine... 2023/06/19 22:33:16 checking revisions... [ 154.793830] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:33:16 testing simple program... [ 154.843605] cgroup: Unknown subsys name 'net' [ 154.898475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:31:14 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800a078000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800a078180 RSP=ffff88806ce09c48 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800a07c4c8 R14=0000000000000000 R15=ffff88800a078008 RIP=ffffffff821920cf 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 00007fcf2db6f900 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=00007fcf2e124650 CR3=000000000fca0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=1ffff110011e7f37 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff8880147124d0 RDI=0000000000000000 RBP=ffff888018c029a8 RSP=ffff888008f3f978 R8 =0000000000000005 R9 =00000000000003ff R10=0000000000000400 R11=0000000000000128 R12=0000000000000001 R13=ffff8880147124d0 R14=ffff8880147124d0 R15=ffff88801ac467f0 RIP=ffffffff84482ab2 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 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=00007fcf2db04000 CR3=000000000fca0000 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=2301483e714705c1133591fe3d18b07f XMM02=d65714020f0aa839103d02624da640fb XMM03=35e20d0cac3fd2bc543f0b46228ca6eb XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000