syzkaller login: [ 30.957817] BUG: Bad rss-counter state mm:00000000a9f03d06 type:MM_FILEPAGES val:33 [ 30.959055] BUG: Bad rss-counter state mm:00000000a9f03d06 type:MM_ANONPAGES val:22 [ 31.123602] ================================================================== [ 31.124507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.125437] Read of size 8 at addr ffff88800c6a76b0 by task sshd/221 [ 31.126212] [ 31.126440] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.127430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.128412] Call Trace: [ 31.128735] [ 31.129147] dump_stack_lvl+0x91/0xf0 [ 31.129733] print_report+0xcc/0x620 [ 31.130298] ? __virt_addr_valid+0x102/0x340 [ 31.130972] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132426] kasan_report+0xbe/0xf0 [ 31.133010] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.133758] vma_interval_tree_remove+0xc75/0xec0 [ 31.134500] vma_prepare+0xc54/0x11a0 [ 31.135069] __split_vma+0x5af/0x950 [ 31.135630] ? __pfx___split_vma+0x10/0x10 [ 31.136261] ? find_held_lock+0x2c/0x110 [ 31.136895] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.137572] ? lock_is_held_type+0x9f/0x120 [ 31.138220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.138956] ? mtree_range_walk+0x632/0x900 [ 31.139515] ? mas_walk+0x5c7/0x7c0 [ 31.139998] do_vmi_munmap+0x1f1/0x2b0 [ 31.140490] mmap_region+0x1f9/0x2660 [ 31.140985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.141503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.142241] ? __pfx_lock_acquire+0x10/0x10 [ 31.142803] ? __pfx_mmap_region+0x10/0x10 [ 31.143356] ? security_mmap_addr+0x7d/0xa0 [ 31.143909] ? get_unmapped_area+0x1f5/0x3f0 [ 31.144479] do_mmap+0x854/0xf00 [ 31.144937] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.145459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.146041] ksys_mmap_pgoff+0x3af/0x500 [ 31.146593] do_syscall_64+0x3f/0x90 [ 31.147100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147778] RIP: 0033:0x7fb76f139d82 [ 31.148259] 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 [ 31.150482] RSP: 002b:00007ffc6d7cb318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.151429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb76f139d82 [ 31.152310] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb76e573000 [ 31.153182] RBP: 00007fb76e573000 R08: 0000000000000009 R09: 0000000000001000 [ 31.154064] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d5ed89ec0 [ 31.154955] R13: 00007ffc6d7cb330 R14: 00007ffc6d7cb360 R15: 00007ffc6d7cb6c0 [ 31.155849] [ 31.156154] [ 31.156376] Allocated by task 214: [ 31.156821] kasan_save_stack+0x22/0x50 [ 31.157341] kasan_set_track+0x25/0x30 [ 31.157859] __kasan_slab_alloc+0x59/0x70 [ 31.158419] kmem_cache_alloc+0x16b/0x370 [ 31.158956] vm_area_dup+0x20/0x160 [ 31.159425] __split_vma+0x170/0x950 [ 31.159918] split_vma+0xc6/0x110 [ 31.160379] mprotect_fixup+0x8d2/0xb30 [ 31.160907] do_mprotect_pkey+0x87e/0xd40 [ 31.161444] __x64_sys_mprotect+0x78/0xc0 [ 31.161986] do_syscall_64+0x3f/0x90 [ 31.162488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163156] [ 31.163379] Freed by task 214: [ 31.163783] kasan_save_stack+0x22/0x50 [ 31.164304] kasan_set_track+0x25/0x30 [ 31.164821] kasan_save_free_info+0x2b/0x50 [ 31.165381] __kasan_slab_free+0x10a/0x190 [ 31.165932] kmem_cache_free+0x10d/0x4d0 [ 31.166467] rcu_core+0x8c8/0x2860 [ 31.166930] __do_softirq+0x1b7/0x7d4 [ 31.167433] [ 31.167655] Last potentially related work creation: [ 31.168266] kasan_save_stack+0x22/0x50 [ 31.168784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.169385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.170053] remove_vma+0x139/0x170 [ 31.170544] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.171122] do_vmi_munmap+0x1f1/0x2b0 [ 31.171632] __vm_munmap+0x138/0x3a0 [ 31.172117] __x64_sys_munmap+0x59/0x80 [ 31.172635] do_syscall_64+0x3f/0x90 [ 31.173129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173799] [ 31.174021] The buggy address belongs to the object at ffff88800c6a7658 [ 31.174021] which belongs to the cache vm_area_struct of size 168 [ 31.175572] The buggy address is located 88 bytes inside of [ 31.175572] freed 168-byte region [ffff88800c6a7658, ffff88800c6a7700) [ 31.177035] [ 31.177259] The buggy address belongs to the physical page: [ 31.177950] page:00000000f10bca45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a7 [ 31.179088] memcg:ffff888016ccad01 [ 31.179530] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.180200] page_type: 0xffffffff() [ 31.180667] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.181628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ccad01 [ 31.182597] page dumped because: kasan: bad access detected [ 31.183285] [ 31.183507] Memory state around the buggy address: [ 31.184112] ffff88800c6a7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.185003] ffff88800c6a7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.185888] >ffff88800c6a7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.186797] ^ [ 31.187400] ffff88800c6a7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.188305] ffff88800c6a7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.189186] ================================================================== [ 31.190185] Disabling lock debugging due to kernel taint [ 33.593209] BUG: Bad rss-counter state mm:0000000055405783 type:MM_FILEPAGES val:33 [ 33.594412] BUG: Bad rss-counter state mm:0000000055405783 type:MM_ANONPAGES val:22 [ 34.137446] BUG: Bad rss-counter state mm:00000000a38c6bb6 type:MM_FILEPAGES val:33 [ 34.138459] BUG: Bad rss-counter state mm:00000000a38c6bb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1679' (ECDSA) to the list of known hosts. 2023/06/20 11:58:28 fuzzer started 2023/06/20 11:58:28 dialing manager at localhost:36067 2023/06/20 11:58:28 checking machine... 2023/06/20 11:58:28 checking revisions... [ 34.860110] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:58:28 testing simple program... [ 34.916977] cgroup: Unknown subsys name 'net' [ 34.972086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd02c1b608 CR3=000000000e784000 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=2037323a38353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ff20d3ef160 CR3=0000000009832000 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=2a0f3ec3cd2b3793294a46009098016e XMM02=2c67c8bc2e329bc3000000000011a948 XMM03=fb795ef6d65770560000000000121ec0 XMM04=7bcfcb6fa672e07f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c88 XMM06=f58b35719a117eb00000000000130af0 XMM07=e042d86d42eb936e0000000000122140 XMM08=6756864d9b724069000000000011a9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000