syzkaller login: [ 30.033569] BUG: Bad rss-counter state mm:000000007de0923f type:MM_FILEPAGES val:33 [ 30.035040] BUG: Bad rss-counter state mm:000000007de0923f type:MM_ANONPAGES val:22 [ 30.195282] ================================================================== [ 30.196247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.197269] Read of size 8 at addr ffff88800dc95310 by task sshd/220 [ 30.198211] [ 30.198472] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.199400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.200473] Call Trace: [ 30.200824] <TASK> [ 30.201136] dump_stack_lvl+0x91/0xf0 [ 30.201658] print_report+0xcc/0x620 [ 30.202172] ? __virt_addr_valid+0x102/0x340 [ 30.202773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.203433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.204088] kasan_report+0xbe/0xf0 [ 30.204592] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.205273] vma_interval_tree_remove+0xc75/0xec0 [ 30.205924] vma_prepare+0xc54/0x11a0 [ 30.206428] __split_vma+0x5af/0x950 [ 30.206929] ? __pfx___split_vma+0x10/0x10 [ 30.207491] ? find_held_lock+0x2c/0x110 [ 30.208047] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.208648] ? lock_is_held_type+0x9f/0x120 [ 30.209242] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.209893] ? mtree_range_walk+0x632/0x900 [ 30.210481] ? mas_walk+0x5c7/0x7c0 [ 30.210992] do_vmi_munmap+0x1f1/0x2b0 [ 30.211521] mmap_region+0x1f9/0x2660 [ 30.212037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.212582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.213356] ? __pfx_lock_acquire+0x10/0x10 [ 30.213933] ? __pfx_mmap_region+0x10/0x10 [ 30.214492] ? security_mmap_addr+0x7d/0xa0 [ 30.215066] ? get_unmapped_area+0x1f5/0x3f0 [ 30.215663] do_mmap+0x854/0xf00 [ 30.216136] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.216672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.217276] ksys_mmap_pgoff+0x3af/0x500 [ 30.217820] do_syscall_64+0x3f/0x90 [ 30.218335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.219025] RIP: 0033:0x7f7439ab3d82 [ 30.219507] 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 [ 30.221809] RSP: 002b:00007ffd0eeb00a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.222763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7439ab3d82 [ 30.223659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7438eed000 [ 30.224560] RBP: 00007f7438eed000 R08: 0000000000000009 R09: 0000000000001000 [ 30.225474] R10: 0000000000000812 R11: 0000000000000206 R12: 000055766ad8fec0 [ 30.226370] R13: 00007ffd0eeb00c0 R14: 00007ffd0eeb00f0 R15: 00007ffd0eeb0450 [ 30.227292] </TASK> [ 30.227611] [ 30.227840] Allocated by task 213: [ 30.228292] kasan_save_stack+0x22/0x50 [ 30.228831] kasan_set_track+0x25/0x30 [ 30.229366] __kasan_slab_alloc+0x59/0x70 [ 30.229925] kmem_cache_alloc+0x16b/0x370 [ 30.230478] vm_area_dup+0x20/0x160 [ 30.230966] __split_vma+0x170/0x950 [ 30.231462] split_vma+0xc6/0x110 [ 30.231930] mprotect_fixup+0x8d2/0xb30 [ 30.232468] do_mprotect_pkey+0x87e/0xd40 [ 30.233042] __x64_sys_mprotect+0x78/0xc0 [ 30.233603] do_syscall_64+0x3f/0x90 [ 30.234109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.234796] [ 30.235028] Freed by task 213: [ 30.235445] kasan_save_stack+0x22/0x50 [ 30.235982] kasan_set_track+0x25/0x30 [ 30.236511] kasan_save_free_info+0x2b/0x50 [ 30.237093] __kasan_slab_free+0x10a/0x190 [ 30.237673] kmem_cache_free+0x10d/0x4d0 [ 30.238218] rcu_core+0x8c8/0x2860 [ 30.238698] __do_softirq+0x1b7/0x7d4 [ 30.239325] [ 30.239557] Last potentially related work creation: [ 30.240181] kasan_save_stack+0x22/0x50 [ 30.240718] __kasan_record_aux_stack+0x8e/0xa0 [ 30.241338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.242025] remove_vma+0x139/0x170 [ 30.242510] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.243114] do_vmi_munmap+0x1f1/0x2b0 [ 30.243630] __vm_munmap+0x138/0x3a0 [ 30.244125] __x64_sys_munmap+0x59/0x80 [ 30.244658] do_syscall_64+0x3f/0x90 [ 30.245183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.245868] [ 30.246096] The buggy address belongs to the object at ffff88800dc952b8 [ 30.246096] which belongs to the cache vm_area_struct of size 168 [ 30.247666] The buggy address is located 88 bytes inside of [ 30.247666] freed 168-byte region [ffff88800dc952b8, ffff88800dc95360) [ 30.249184] [ 30.249413] The buggy address belongs to the physical page: [ 30.250119] page:000000005fb69fa4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc95 [ 30.251278] memcg:ffff88800f605301 [ 30.251737] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.252427] page_type: 0xffffffff() [ 30.252912] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.253905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f605301 [ 30.254870] page dumped because: kasan: bad access detected [ 30.255572] [ 30.255803] Memory state around the buggy address: [ 30.256430] ffff88800dc95200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.257349] ffff88800dc95280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.258264] >ffff88800dc95300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.259172] ^ [ 30.259672] ffff88800dc95380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.260587] ffff88800dc95400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.261497] ================================================================== [ 30.262484] Disabling lock debugging due to kernel taint [ 32.426768] BUG: Bad rss-counter state mm:00000000a645843e type:MM_FILEPAGES val:33 [ 32.427771] BUG: Bad rss-counter state mm:00000000a645843e type:MM_ANONPAGES val:22 [ 33.002229] BUG: Bad rss-counter state mm:0000000031126e15 type:MM_FILEPAGES val:33 [ 33.003436] BUG: Bad rss-counter state mm:0000000031126e15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30934' (ECDSA) to the list of known hosts. 2023/06/20 17:19:21 fuzzer started 2023/06/20 17:19:21 dialing manager at localhost:36067 2023/06/20 17:19:21 checking machine... 2023/06/20 17:19:21 checking revisions... [ 33.654516] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:19:21 testing simple program... [ 33.704992] cgroup: Unknown subsys name 'net' [ 33.762198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:19:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e2c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016fbf9b8 RSP=ffff888016fbf8f0 R8 =ffffffff86138e30 R9 =ffff888016fbf9a0 R10=0000000000038001 R11=0000000000020d7b R12=ffff888016fbf9c0 R13=ffff888016fbf9a8 R14=0000000000000005 R15=ffff888016fbf960 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 00007ff0002d2900 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=00007ff00088a0b0 CR3=00000000101fc000 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=1ffffffff0c0aa69 RBX=ffffffff86055348 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff86055348 RSP=ffff88806cf099c0 R8 =ffffffff864bbb4e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f65b84eb900 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=00007f65b7a0a028 CR3=000000000f6a6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9858968dc85e8eb500000000000ae988 XMM05=c67524749ab4d2020000000000133db0 XMM06=19e9129bd510f2350000000000132c48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000