syzkaller login: [ 31.074975] BUG: Bad rss-counter state mm:00000000e069d7c3 type:MM_FILEPAGES val:33 [ 31.076151] BUG: Bad rss-counter state mm:00000000e069d7c3 type:MM_ANONPAGES val:22 [ 31.114993] ================================================================== [ 31.115979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116938] Read of size 8 at addr ffff88801469b058 by task sshd/220 [ 31.117797] [ 31.118063] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119934] Call Trace: [ 31.120273] [ 31.120561] dump_stack_lvl+0x91/0xf0 [ 31.121052] print_report+0xcc/0x620 [ 31.121539] ? __virt_addr_valid+0x102/0x340 [ 31.122098] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123334] kasan_report+0xbe/0xf0 [ 31.123810] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124436] vma_interval_tree_remove+0xc75/0xec0 [ 31.125040] vma_prepare+0xc54/0x11a0 [ 31.125518] __split_vma+0x5af/0x950 [ 31.125992] ? __pfx___split_vma+0x10/0x10 [ 31.126537] ? find_held_lock+0x2c/0x110 [ 31.127060] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127623] ? lock_is_held_type+0x9f/0x120 [ 31.128159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.128763] ? mtree_range_walk+0x632/0x900 [ 31.129315] ? mas_walk+0x5c7/0x7c0 [ 31.129796] do_vmi_munmap+0x1f1/0x2b0 [ 31.130304] mmap_region+0x1f9/0x2660 [ 31.130796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132026] ? __pfx_lock_acquire+0x10/0x10 [ 31.132559] ? __pfx_mmap_region+0x10/0x10 [ 31.133089] ? security_mmap_addr+0x7d/0xa0 [ 31.133621] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134177] do_mmap+0x854/0xf00 [ 31.134629] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.135690] ksys_mmap_pgoff+0x3af/0x500 [ 31.136200] do_syscall_64+0x3f/0x90 [ 31.136682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137341] RIP: 0033:0x7ff6f2c73d82 [ 31.137799] 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 [ 31.139945] RSP: 002b:00007ffe6d58a9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.140848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6f2c73d82 [ 31.141699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6f20ad000 [ 31.142563] RBP: 00007ff6f20ad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ecc5e8f70 [ 31.144262] R13: 00007ffe6d58aa10 R14: 00007ffe6d58aa40 R15: 00007ffe6d58ada0 [ 31.145124] [ 31.145420] [ 31.145638] Allocated by task 213: [ 31.146068] kasan_save_stack+0x22/0x50 [ 31.146597] kasan_set_track+0x25/0x30 [ 31.147099] __kasan_slab_alloc+0x59/0x70 [ 31.147620] kmem_cache_alloc+0x16b/0x370 [ 31.148131] vm_area_dup+0x20/0x160 [ 31.148586] __split_vma+0x170/0x950 [ 31.149057] split_vma+0xc6/0x110 [ 31.149494] mprotect_fixup+0x8d2/0xb30 [ 31.149997] do_mprotect_pkey+0x87e/0xd40 [ 31.150530] __x64_sys_mprotect+0x78/0xc0 [ 31.151051] do_syscall_64+0x3f/0x90 [ 31.151531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152176] [ 31.152394] Freed by task 213: [ 31.152790] kasan_save_stack+0x22/0x50 [ 31.153294] kasan_set_track+0x25/0x30 [ 31.153789] kasan_save_free_info+0x2b/0x50 [ 31.154329] __kasan_slab_free+0x10a/0x190 [ 31.154860] kmem_cache_free+0x10d/0x4d0 [ 31.155369] rcu_core+0x8c8/0x2860 [ 31.155827] __do_softirq+0x1b7/0x7d4 [ 31.156312] [ 31.156530] Last potentially related work creation: [ 31.157117] kasan_save_stack+0x22/0x50 [ 31.157631] __kasan_record_aux_stack+0x8e/0xa0 [ 31.158312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.159123] remove_vma+0x139/0x170 [ 31.159668] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.160424] do_vmi_munmap+0x1f1/0x2b0 [ 31.161018] __vm_munmap+0x138/0x3a0 [ 31.161579] __x64_sys_munmap+0x59/0x80 [ 31.162197] do_syscall_64+0x3f/0x90 [ 31.162778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163560] [ 31.163822] The buggy address belongs to the object at ffff88801469b000 [ 31.163822] which belongs to the cache vm_area_struct of size 168 [ 31.165632] The buggy address is located 88 bytes inside of [ 31.165632] freed 168-byte region [ffff88801469b000, ffff88801469b0a8) [ 31.167292] [ 31.167512] The buggy address belongs to the physical page: [ 31.168167] page:00000000832e8c8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1469b [ 31.169246] memcg:ffff888013fe8a01 [ 31.169675] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.170327] page_type: 0xffffffff() [ 31.170778] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.171689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fe8a01 [ 31.172580] page dumped because: kasan: bad access detected [ 31.173231] [ 31.173452] Memory state around the buggy address: [ 31.174028] ffff88801469af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.174881] ffff88801469af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.175768] >ffff88801469b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.176646] ^ [ 31.177376] ffff88801469b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.178274] ffff88801469b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.179126] ================================================================== [ 31.180170] Disabling lock debugging due to kernel taint [ 33.334058] BUG: Bad rss-counter state mm:00000000d7d9b992 type:MM_FILEPAGES val:33 [ 33.334935] BUG: Bad rss-counter state mm:00000000d7d9b992 type:MM_ANONPAGES val:22 [ 33.823499] BUG: Bad rss-counter state mm:000000003d8bc1df type:MM_FILEPAGES val:33 [ 33.824485] BUG: Bad rss-counter state mm:000000003d8bc1df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62518' (ECDSA) to the list of known hosts. 2023/06/20 13:18:19 fuzzer started 2023/06/20 13:18:20 dialing manager at localhost:36067 2023/06/20 13:18:20 checking machine... 2023/06/20 13:18:20 checking revisions... [ 34.537380] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:18:20 testing simple program... [ 34.591730] cgroup: Unknown subsys name 'net' [ 34.636716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8184cebc RDX=ffff888019fdd1c0 RSI=0000000000000002 RDI=0000000000000005 RBP=ffffffff84900ca0 RSP=ffff888015f7faa0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000005 R14=0000000000000003 R15=00007fff18fb8794 RIP=ffffffff814c04a0 RFL=00000202 [-------] 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 00007f66122e3900 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=00007f661289a618 CR3=000000000edf8000 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=00007fb4d202c000 CR3=000000000c4a0000 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=0660de7377b5db9f604605ca8908bac7 XMM02=000000000011d428ec2efd57dc4c00df XMM03=0000000000121b9040b84c99092ab44d XMM04=c63685ded93e5e7100000000000ae988 XMM05=19e9129bd510f2350000000000131a38 XMM06=4fda316b135da52b00000000001318c0 XMM07=e042d86d42eb936e0000000000121e10 XMM08=40b84c99092ab44d000000000011d488 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000