syzkaller login: [ 31.103342] BUG: Bad rss-counter state mm:000000003ee0ac55 type:MM_FILEPAGES val:33 [ 31.104794] BUG: Bad rss-counter state mm:000000003ee0ac55 type:MM_ANONPAGES val:22 [ 31.153442] ================================================================== [ 31.154495] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.155571] Read of size 8 at addr ffff888019cd5140 by task sshd/221 [ 31.156421] [ 31.156670] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.157630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.158714] Call Trace: [ 31.159088] [ 31.159409] dump_stack_lvl+0x91/0xf0 [ 31.159959] print_report+0xcc/0x620 [ 31.160488] ? __virt_addr_valid+0x102/0x340 [ 31.161091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162453] kasan_report+0xbe/0xf0 [ 31.163025] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163735] vma_interval_tree_remove+0xc75/0xec0 [ 31.164420] vma_prepare+0xc54/0x11a0 [ 31.164972] __split_vma+0x5af/0x950 [ 31.165507] ? __pfx___split_vma+0x10/0x10 [ 31.166108] ? find_held_lock+0x2c/0x110 [ 31.166700] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.167370] ? lock_is_held_type+0x9f/0x120 [ 31.167989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.168682] ? mtree_range_walk+0x632/0x900 [ 31.169310] ? mas_walk+0x5c7/0x7c0 [ 31.169855] do_vmi_munmap+0x1f1/0x2b0 [ 31.170418] mmap_region+0x1f9/0x2660 [ 31.170991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.171576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.172391] ? __pfx_lock_acquire+0x10/0x10 [ 31.173006] ? __pfx_mmap_region+0x10/0x10 [ 31.173612] ? security_mmap_addr+0x7d/0xa0 [ 31.174220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.174862] do_mmap+0x854/0xf00 [ 31.175363] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.175930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.176564] ksys_mmap_pgoff+0x3af/0x500 [ 31.177145] do_syscall_64+0x3f/0x90 [ 31.177683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178416] RIP: 0033:0x7f2451956d82 [ 31.178944] 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 [ 31.181377] RSP: 002b:00007ffffdb8e258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.182406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2451956d82 [ 31.183380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2450d90000 [ 31.184348] RBP: 00007f2450d90000 R08: 0000000000000009 R09: 0000000000001000 [ 31.185303] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612b897fec0 [ 31.186275] R13: 00007ffffdb8e270 R14: 00007ffffdb8e2a0 R15: 00007ffffdb8e600 [ 31.187273] [ 31.187602] [ 31.187845] Allocated by task 214: [ 31.188330] kasan_save_stack+0x22/0x50 [ 31.188897] kasan_set_track+0x25/0x30 [ 31.189449] __kasan_slab_alloc+0x59/0x70 [ 31.190035] kmem_cache_alloc+0x16b/0x370 [ 31.190621] vm_area_dup+0x20/0x160 [ 31.191143] __split_vma+0x170/0x950 [ 31.191669] split_vma+0xc6/0x110 [ 31.192165] mprotect_fixup+0x8d2/0xb30 [ 31.192735] do_mprotect_pkey+0x87e/0xd40 [ 31.193330] __x64_sys_mprotect+0x78/0xc0 [ 31.193912] do_syscall_64+0x3f/0x90 [ 31.194448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195201] [ 31.195442] Freed by task 214: [ 31.195890] kasan_save_stack+0x22/0x50 [ 31.196457] kasan_set_track+0x25/0x30 [ 31.197016] kasan_save_free_info+0x2b/0x50 [ 31.197616] __kasan_slab_free+0x10a/0x190 [ 31.198214] kmem_cache_free+0x10d/0x4d0 [ 31.198783] rcu_core+0x8c8/0x2860 [ 31.199303] __do_softirq+0x1b7/0x7d4 [ 31.199845] [ 31.200086] Last potentially related work creation: [ 31.200754] kasan_save_stack+0x22/0x50 [ 31.201326] __kasan_record_aux_stack+0x8e/0xa0 [ 31.201966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.202686] remove_vma+0x139/0x170 [ 31.203198] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.203826] do_vmi_munmap+0x1f1/0x2b0 [ 31.204364] __vm_munmap+0x138/0x3a0 [ 31.204887] __x64_sys_munmap+0x59/0x80 [ 31.205441] do_syscall_64+0x3f/0x90 [ 31.205968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206688] [ 31.206944] The buggy address belongs to the object at ffff888019cd50e8 [ 31.206944] which belongs to the cache vm_area_struct of size 168 [ 31.208598] The buggy address is located 88 bytes inside of [ 31.208598] freed 168-byte region [ffff888019cd50e8, ffff888019cd5190) [ 31.210177] [ 31.210417] The buggy address belongs to the physical page: [ 31.211165] page:000000001b7154fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd5 [ 31.212395] memcg:ffff888015c2a201 [ 31.212871] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.213593] page_type: 0xffffffff() [ 31.214095] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.215137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c2a201 [ 31.216159] page dumped because: kasan: bad access detected [ 31.216889] [ 31.217127] Memory state around the buggy address: [ 31.217765] ffff888019cd5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.218713] ffff888019cd5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.219671] >ffff888019cd5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.220614] ^ [ 31.221317] ffff888019cd5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.222268] ffff888019cd5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.223220] ================================================================== [ 31.224720] Disabling lock debugging due to kernel taint [ 33.002173] BUG: Bad rss-counter state mm:00000000337b8112 type:MM_FILEPAGES val:33 [ 33.003611] BUG: Bad rss-counter state mm:00000000337b8112 type:MM_ANONPAGES val:22 [ 33.494006] BUG: Bad rss-counter state mm:000000002a00c181 type:MM_FILEPAGES val:33 [ 33.494709] BUG: Bad rss-counter state mm:000000002a00c181 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28699' (ECDSA) to the list of known hosts. 2023/06/20 15:51:07 fuzzer started 2023/06/20 15:51:07 dialing manager at localhost:36067 2023/06/20 15:51:07 checking machine... 2023/06/20 15:51:07 checking revisions... [ 34.303405] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:51:07 testing simple program... [ 34.341345] cgroup: Unknown subsys name 'net' [ 34.379518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:07 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00005558974f0a34 RCX=0000000000000007 RDX=00005558974f0a39 RSI=fffffffffffffffc RDI=0000000000000004 RBP=00005558974f0a39 RSP=00007ffeb6a51118 R8 =0000000000000003 R9 =00007ffeb6be2080 R10=0000000000000000 R11=00007ffeb6a511e0 R12=0000000000000003 R13=00007ffeb6a511f0 R14=00007ffeb6a511e8 R15=0000000000000004 RIP=00007f5b99ee90f0 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5b99694900 00000000 00000000 GS =0000 0000000000000000 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=00007f5b98b1f570 CR3=000000000cb94000 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=00000000000000000000000000000000 XMM02=ffffffff0f0e0d0c0b0a090807060504 XMM03=8357f94371895e45000000000011bb70 XMM04=dcfd95bb8a688c2400000000000ae988 XMM05=b9795f99aa9a76ae0000000000133ab8 XMM06=c291bd5c70af25b900000000001328a8 XMM07=fb795ef6d65770560000000000122be8 XMM08=31353a3531203032206e754a3e36383c XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b3be3 RBX=0000000000000001 RCX=ffffffff863b3bde RDX=0000000000000000 RSI=1ffffffff0c7677c RDI=ffffffff85fa53a8 RBP=ffff888015fff7a0 RSP=ffff888015fff6d8 R8 =ffffffff863b3bde R9 =ffff888015fff788 R10=0000000000038001 R11=000000000008aa79 R12=ffff888015fff7a8 R13=ffff888015fff790 R14=ffff888015fff789 R15=ffff888015fff748 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f7362fae900 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=00007ffdf9050000 CR3=000000000e9b2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000