syzkaller login: [ 31.057834] BUG: Bad rss-counter state mm:000000007b2c8eef type:MM_FILEPAGES val:33 [ 31.059049] BUG: Bad rss-counter state mm:000000007b2c8eef type:MM_ANONPAGES val:22 [ 31.101904] ================================================================== [ 31.102818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.103757] Read of size 8 at addr ffff88800d609058 by task sshd/222 [ 31.104530] [ 31.104746] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.105627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.106617] Call Trace: [ 31.106948] [ 31.107232] dump_stack_lvl+0x91/0xf0 [ 31.107723] print_report+0xcc/0x620 [ 31.108210] ? __virt_addr_valid+0x102/0x340 [ 31.108786] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110037] kasan_report+0xbe/0xf0 [ 31.110500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111139] vma_interval_tree_remove+0xc75/0xec0 [ 31.111768] vma_prepare+0xc54/0x11a0 [ 31.112264] __split_vma+0x5af/0x950 [ 31.112755] ? __pfx___split_vma+0x10/0x10 [ 31.113326] ? find_held_lock+0x2c/0x110 [ 31.113865] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.114451] ? lock_is_held_type+0x9f/0x120 [ 31.115013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.115636] ? mtree_range_walk+0x632/0x900 [ 31.116204] ? mas_walk+0x5c7/0x7c0 [ 31.116693] do_vmi_munmap+0x1f1/0x2b0 [ 31.117219] mmap_region+0x1f9/0x2660 [ 31.117719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.118246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.118995] ? __pfx_lock_acquire+0x10/0x10 [ 31.119549] ? __pfx_mmap_region+0x10/0x10 [ 31.120094] ? security_mmap_addr+0x7d/0xa0 [ 31.120641] ? get_unmapped_area+0x1f5/0x3f0 [ 31.121231] do_mmap+0x854/0xf00 [ 31.121681] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.122195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122771] ksys_mmap_pgoff+0x3af/0x500 [ 31.123302] do_syscall_64+0x3f/0x90 [ 31.123802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124468] RIP: 0033:0x7fa3a8281d82 [ 31.124960] 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 [ 31.127151] RSP: 002b:00007ffc9d625908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.128059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3a8281d82 [ 31.128917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3a76bb000 [ 31.129783] RBP: 00007fa3a76bb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.130640] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c76d469f70 [ 31.131507] R13: 00007ffc9d625920 R14: 00007ffc9d625950 R15: 00007ffc9d625cb0 [ 31.132368] [ 31.132666] [ 31.132882] Allocated by task 215: [ 31.133336] kasan_save_stack+0x22/0x50 [ 31.133838] kasan_set_track+0x25/0x30 [ 31.134328] __kasan_slab_alloc+0x59/0x70 [ 31.134882] kmem_cache_alloc+0x16b/0x370 [ 31.135405] vm_area_dup+0x20/0x160 [ 31.135870] __split_vma+0x170/0x950 [ 31.136344] split_vma+0xc6/0x110 [ 31.136793] mprotect_fixup+0x8d2/0xb30 [ 31.137330] do_mprotect_pkey+0x87e/0xd40 [ 31.137857] __x64_sys_mprotect+0x78/0xc0 [ 31.138383] do_syscall_64+0x3f/0x90 [ 31.138864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139512] [ 31.139733] Freed by task 215: [ 31.140139] kasan_save_stack+0x22/0x50 [ 31.140653] kasan_set_track+0x25/0x30 [ 31.141173] kasan_save_free_info+0x2b/0x50 [ 31.141720] __kasan_slab_free+0x10a/0x190 [ 31.142259] kmem_cache_free+0x10d/0x4d0 [ 31.142770] rcu_core+0x8c8/0x2860 [ 31.143264] __do_softirq+0x1b7/0x7d4 [ 31.143757] [ 31.143980] Last potentially related work creation: [ 31.144571] kasan_save_stack+0x22/0x50 [ 31.145100] __kasan_record_aux_stack+0x8e/0xa0 [ 31.145675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.146325] remove_vma+0x139/0x170 [ 31.146777] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.147343] do_vmi_munmap+0x1f1/0x2b0 [ 31.147832] __vm_munmap+0x138/0x3a0 [ 31.148305] __x64_sys_munmap+0x59/0x80 [ 31.148800] do_syscall_64+0x3f/0x90 [ 31.149292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149940] [ 31.150161] The buggy address belongs to the object at ffff88800d609000 [ 31.150161] which belongs to the cache vm_area_struct of size 168 [ 31.151639] The buggy address is located 88 bytes inside of [ 31.151639] freed 168-byte region [ffff88800d609000, ffff88800d6090a8) [ 31.153065] [ 31.153290] The buggy address belongs to the physical page: [ 31.153952] page:00000000688fdd80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd609 [ 31.155036] memcg:ffff88800e4b5901 [ 31.155466] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.156168] page_type: 0xffffffff() [ 31.156618] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380300 dead000000000005 [ 31.157544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4b5901 [ 31.158453] page dumped because: kasan: bad access detected [ 31.159137] [ 31.159355] Memory state around the buggy address: [ 31.159966] ffff88800d608f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.160821] ffff88800d608f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.161701] >ffff88800d609000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.162557] ^ [ 31.163296] ffff88800d609080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.164167] ffff88800d609100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.165038] ================================================================== [ 31.165961] Disabling lock debugging due to kernel taint [ 33.350415] BUG: Bad rss-counter state mm:00000000ba4bc4f8 type:MM_FILEPAGES val:33 [ 33.351409] BUG: Bad rss-counter state mm:00000000ba4bc4f8 type:MM_ANONPAGES val:22 [ 33.912303] BUG: Bad rss-counter state mm:00000000cf49b8c5 type:MM_FILEPAGES val:33 [ 33.913552] BUG: Bad rss-counter state mm:00000000cf49b8c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48837' (ECDSA) to the list of known hosts. 2023/06/20 16:22:11 fuzzer started 2023/06/20 16:22:11 dialing manager at localhost:36067 2023/06/20 16:22:11 checking machine... 2023/06/20 16:22:11 checking revisions... [ 34.565899] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:11 testing simple program... [ 34.612443] cgroup: Unknown subsys name 'net' [ 34.656287] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c6cd800 RCX=ffffffff812e0135 RDX=1ffff11002ccc054 RSI=0000000000000000 RDI=ffff8880166602a0 RBP=ffff888016660260 RSP=ffff88801659f8b8 R8 =0000000000000001 R9 =ffffed1002cb3f05 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea000031b300 R14=ffffffff8367562f R15=ffff88800da57d00 RIP=ffffffff845195a1 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 00007f7c58978700 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=00007f85d09c21a0 CR3=000000000ecf6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38343132342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383431 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffffffff86098092 RDX=1ffff1100d9e1353 RSI=ffff88806cf09a90 RDI=ffff88806cf09a98 RBP=ffff88806cf09a90 RSP=ffff88806cf099a0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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 00007fcbdd8dd900 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=00007fcbdde94618 CR3=0000000014668000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000