syzkaller login: [ 31.929554] BUG: Bad rss-counter state mm:00000000d777eb63 type:MM_FILEPAGES val:33 [ 31.931255] BUG: Bad rss-counter state mm:00000000d777eb63 type:MM_ANONPAGES val:22 [ 32.095329] ================================================================== [ 32.096276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.097234] Read of size 8 at addr ffff88800dd91d08 by task sshd/221 [ 32.098072] [ 32.098296] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.099193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.100207] Call Trace: [ 32.100539] [ 32.100821] dump_stack_lvl+0x91/0xf0 [ 32.101327] print_report+0xcc/0x620 [ 32.101824] ? __virt_addr_valid+0x102/0x340 [ 32.102403] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.103047] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.103702] kasan_report+0xbe/0xf0 [ 32.104204] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.104824] vma_interval_tree_remove+0xc75/0xec0 [ 32.105457] vma_prepare+0xc54/0x11a0 [ 32.105938] __split_vma+0x5af/0x950 [ 32.106422] ? __pfx___split_vma+0x10/0x10 [ 32.106944] ? find_held_lock+0x2c/0x110 [ 32.107503] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.108098] ? lock_is_held_type+0x9f/0x120 [ 32.108651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.109269] ? mtree_range_walk+0x632/0x900 [ 32.109820] ? mas_walk+0x5c7/0x7c0 [ 32.110321] do_vmi_munmap+0x1f1/0x2b0 [ 32.110821] mmap_region+0x1f9/0x2660 [ 32.111332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.111879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.112606] ? __pfx_lock_acquire+0x10/0x10 [ 32.113157] ? __pfx_mmap_region+0x10/0x10 [ 32.113692] ? security_mmap_addr+0x7d/0xa0 [ 32.114236] ? get_unmapped_area+0x1f5/0x3f0 [ 32.114790] do_mmap+0x854/0xf00 [ 32.115262] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.115767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.116344] ksys_mmap_pgoff+0x3af/0x500 [ 32.116862] do_syscall_64+0x3f/0x90 [ 32.117358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.118031] RIP: 0033:0x7ff3ca0b4d82 [ 32.118495] 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 [ 32.120680] RSP: 002b:00007ffc17ea1cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.121608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3ca0b4d82 [ 32.122513] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3c94ee000 [ 32.123442] RBP: 00007ff3c94ee000 R08: 0000000000000009 R09: 0000000000001000 [ 32.124327] R10: 0000000000000812 R11: 0000000000000206 R12: 000055997f4bdf70 [ 32.125190] R13: 00007ffc17ea1d10 R14: 00007ffc17ea1d40 R15: 00007ffc17ea20a0 [ 32.126053] [ 32.126341] [ 32.126557] Allocated by task 214: [ 32.126999] kasan_save_stack+0x22/0x50 [ 32.127543] kasan_set_track+0x25/0x30 [ 32.128083] __kasan_slab_alloc+0x59/0x70 [ 32.128624] kmem_cache_alloc+0x16b/0x370 [ 32.129154] vm_area_dup+0x20/0x160 [ 32.129616] __split_vma+0x170/0x950 [ 32.130119] split_vma+0xc6/0x110 [ 32.130573] mprotect_fixup+0x8d2/0xb30 [ 32.131099] do_mprotect_pkey+0x87e/0xd40 [ 32.131605] __x64_sys_mprotect+0x78/0xc0 [ 32.132117] do_syscall_64+0x3f/0x90 [ 32.132569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.133245] [ 32.133469] Freed by task 214: [ 32.133866] kasan_save_stack+0x22/0x50 [ 32.134392] kasan_set_track+0x25/0x30 [ 32.134888] kasan_save_free_info+0x2b/0x50 [ 32.135469] __kasan_slab_free+0x10a/0x190 [ 32.136026] kmem_cache_free+0x10d/0x4d0 [ 32.136547] rcu_core+0x8c8/0x2860 [ 32.137009] __do_softirq+0x1b7/0x7d4 [ 32.137488] [ 32.137702] Last potentially related work creation: [ 32.138312] kasan_save_stack+0x22/0x50 [ 32.138865] __kasan_record_aux_stack+0x8e/0xa0 [ 32.139630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.140481] remove_vma+0x139/0x170 [ 32.141081] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.141811] do_vmi_munmap+0x1f1/0x2b0 [ 32.142415] __vm_munmap+0x138/0x3a0 [ 32.142888] __x64_sys_munmap+0x59/0x80 [ 32.143440] do_syscall_64+0x3f/0x90 [ 32.143939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.144667] [ 32.144881] The buggy address belongs to the object at ffff88800dd91cb0 [ 32.144881] which belongs to the cache vm_area_struct of size 168 [ 32.146446] The buggy address is located 88 bytes inside of [ 32.146446] freed 168-byte region [ffff88800dd91cb0, ffff88800dd91d58) [ 32.147888] [ 32.148127] The buggy address belongs to the physical page: [ 32.148812] page:00000000ca46d68e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd91 [ 32.149949] memcg:ffff88800e7b4401 [ 32.150406] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.151146] page_type: 0xffffffff() [ 32.151622] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e900 dead000000000007 [ 32.152594] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7b4401 [ 32.153525] page dumped because: kasan: bad access detected [ 32.154196] [ 32.154414] Memory state around the buggy address: [ 32.155009] ffff88800dd91c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.155895] ffff88800dd91c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.156761] >ffff88800dd91d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.157617] ^ [ 32.158064] ffff88800dd91d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.158917] ffff88800dd91e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.159802] ================================================================== [ 32.160788] Disabling lock debugging due to kernel taint [ 34.321655] BUG: Bad rss-counter state mm:00000000f55cba7f type:MM_FILEPAGES val:33 [ 34.322653] BUG: Bad rss-counter state mm:00000000f55cba7f type:MM_ANONPAGES val:22 [ 34.803509] BUG: Bad rss-counter state mm:000000006dba5b76 type:MM_FILEPAGES val:33 [ 34.804674] BUG: Bad rss-counter state mm:000000006dba5b76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30655' (ECDSA) to the list of known hosts. 2023/06/21 06:55:15 fuzzer started 2023/06/21 06:55:15 dialing manager at localhost:36067 2023/06/21 06:55:15 checking machine... 2023/06/21 06:55:15 checking revisions... [ 35.456476] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:55:15 testing simple program... [ 35.497060] cgroup: Unknown subsys name 'net' [ 35.534303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:15 Registers: info registers vcpu 0 RAX=1ffff11001a5bcab RBX=ffff88800d2de528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d2de558 RBP=ffff88800f266700 RSP=ffff88800fd4fbd8 R8 =0000000000000001 R9 =ffffed1001fa9f6f R10=0000000000000003 R11=0000000000040000 R12=dffffc0000000000 R13=ffff88800f266800 R14=ffffffff81803033 R15=ffff888016c58000 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 00007eff9fad3900 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=00007effa008b0b0 CR3=00000000165be000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00003d4580 RBX=ffff88800f5165f0 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800844f780 R13=ffff88808f5165f0 R14=ffffffff813782f8 R15=ffff88800f516670 RIP=ffffffff81809a4f 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 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=00007fd5ba5b3ee0 CR3=000000000db00000 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=2035313a35353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000