syzkaller login: [ 29.969424] BUG: Bad rss-counter state mm:000000004f1f8c66 type:MM_FILEPAGES val:33 [ 29.971902] BUG: Bad rss-counter state mm:000000004f1f8c66 type:MM_ANONPAGES val:22 [ 30.135111] ================================================================== [ 30.136060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.137022] Read of size 8 at addr ffff888016439a50 by task sshd/220 [ 30.137900] [ 30.138279] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.139303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.140373] Call Trace: [ 30.140702] [ 30.140986] dump_stack_lvl+0x91/0xf0 [ 30.141511] print_report+0xcc/0x620 [ 30.142003] ? __virt_addr_valid+0x102/0x340 [ 30.142576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.143190] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.143839] kasan_report+0xbe/0xf0 [ 30.144340] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.144964] vma_interval_tree_remove+0xc75/0xec0 [ 30.145614] vma_prepare+0xc54/0x11a0 [ 30.146106] __split_vma+0x5af/0x950 [ 30.146603] ? __pfx___split_vma+0x10/0x10 [ 30.147135] ? find_held_lock+0x2c/0x110 [ 30.147698] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.148267] ? lock_is_held_type+0x9f/0x120 [ 30.148819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.149463] ? mtree_range_walk+0x632/0x900 [ 30.150021] ? mas_walk+0x5c7/0x7c0 [ 30.150525] do_vmi_munmap+0x1f1/0x2b0 [ 30.151023] mmap_region+0x1f9/0x2660 [ 30.151543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.152058] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.152797] ? __pfx_lock_acquire+0x10/0x10 [ 30.153358] ? __pfx_mmap_region+0x10/0x10 [ 30.153905] ? security_mmap_addr+0x7d/0xa0 [ 30.154452] ? get_unmapped_area+0x1f5/0x3f0 [ 30.155003] do_mmap+0x854/0xf00 [ 30.155474] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.155982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.156568] ksys_mmap_pgoff+0x3af/0x500 [ 30.157080] do_syscall_64+0x3f/0x90 [ 30.157605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.158256] RIP: 0033:0x7f06a4211d82 [ 30.158739] 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 [ 30.160961] RSP: 002b:00007ffdbccf3c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.161906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06a4211d82 [ 30.162792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06a364b000 [ 30.163688] RBP: 00007f06a364b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.164570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acf2ddcec0 [ 30.165458] R13: 00007ffdbccf3c80 R14: 00007ffdbccf3cb0 R15: 00007ffdbccf4010 [ 30.166337] [ 30.166643] [ 30.166859] Allocated by task 213: [ 30.167295] kasan_save_stack+0x22/0x50 [ 30.167828] kasan_set_track+0x25/0x30 [ 30.168332] __kasan_slab_alloc+0x59/0x70 [ 30.168872] kmem_cache_alloc+0x16b/0x370 [ 30.169426] vm_area_dup+0x20/0x160 [ 30.169897] __split_vma+0x170/0x950 [ 30.170388] split_vma+0xc6/0x110 [ 30.170834] mprotect_fixup+0x8d2/0xb30 [ 30.171364] do_mprotect_pkey+0x87e/0xd40 [ 30.171916] __x64_sys_mprotect+0x78/0xc0 [ 30.172457] do_syscall_64+0x3f/0x90 [ 30.172945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.173625] [ 30.173845] Freed by task 213: [ 30.174233] kasan_save_stack+0x22/0x50 [ 30.174752] kasan_set_track+0x25/0x30 [ 30.175260] kasan_save_free_info+0x2b/0x50 [ 30.175835] __kasan_slab_free+0x10a/0x190 [ 30.176388] kmem_cache_free+0x10d/0x4d0 [ 30.176901] rcu_core+0x8c8/0x2860 [ 30.177387] __do_softirq+0x1b7/0x7d4 [ 30.177891] [ 30.178109] Last potentially related work creation: [ 30.178709] kasan_save_stack+0x22/0x50 [ 30.179225] __kasan_record_aux_stack+0x8e/0xa0 [ 30.179988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.180657] remove_vma+0x139/0x170 [ 30.181119] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.181718] do_vmi_munmap+0x1f1/0x2b0 [ 30.182212] __vm_munmap+0x138/0x3a0 [ 30.182710] __x64_sys_munmap+0x59/0x80 [ 30.183215] do_syscall_64+0x3f/0x90 [ 30.183744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.184423] [ 30.184644] The buggy address belongs to the object at ffff8880164399f8 [ 30.184644] which belongs to the cache vm_area_struct of size 168 [ 30.186178] The buggy address is located 88 bytes inside of [ 30.186178] freed 168-byte region [ffff8880164399f8, ffff888016439aa0) [ 30.187630] [ 30.187850] The buggy address belongs to the physical page: [ 30.188526] page:000000006d938a2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16439 [ 30.189662] memcg:ffff888015d39901 [ 30.190092] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.190758] page_type: 0xffffffff() [ 30.191215] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.192182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d39901 [ 30.193110] page dumped because: kasan: bad access detected [ 30.193808] [ 30.194031] Memory state around the buggy address: [ 30.194639] ffff888016439900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.195530] ffff888016439980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.196404] >ffff888016439a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.197277] ^ [ 30.198015] ffff888016439a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.198891] ffff888016439b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.199787] ================================================================== [ 30.200765] Disabling lock debugging due to kernel taint [ 32.170766] BUG: Bad rss-counter state mm:00000000223e4686 type:MM_FILEPAGES val:33 [ 32.171892] BUG: Bad rss-counter state mm:00000000223e4686 type:MM_ANONPAGES val:22 [ 32.577362] BUG: Bad rss-counter state mm:00000000a6a81271 type:MM_FILEPAGES val:33 [ 32.578619] BUG: Bad rss-counter state mm:00000000a6a81271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49352' (ECDSA) to the list of known hosts. 2023/06/20 15:04:30 fuzzer started 2023/06/20 15:04:30 dialing manager at localhost:36067 2023/06/20 15:04:30 checking machine... 2023/06/20 15:04:30 checking revisions... [ 33.325356] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:04:30 testing simple program... [ 33.376981] cgroup: Unknown subsys name 'net' [ 33.421646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:04:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016a175a8 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888016a17600 RSP=ffff888016a17588 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888016a17670 R13=0000000000000000 R14=ffff888016c00000 R15=00000000000000e8 RIP=ffffffff811fc897 RFL=00000207 [-----PC] 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 00007ff6f0bff900 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=00007ff6f11b6618 CR3=0000000016d3a000 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=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 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=00007f1159825fc0 CR3=000000000cb90000 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=f8ef6eff11a60fad3f4443869c10e9c8 XMM02=ec2efd57dc4c00df000000000011d908 XMM03=2bc3ad246bbdaee0000000000011d9d8 XMM04=97a7f1918d409f3300000000000ae988 XMM05=19e9129bd510f2350000000000131eb8 XMM06=fe5d15e3e0d14f5e0000000000130d20 XMM07=e042d86d42eb936e00000000001222c0 XMM08=2bc3ad246bbdaee0000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000