syzkaller login: [ 31.004158] BUG: Bad rss-counter state mm:000000005cfb5b03 type:MM_FILEPAGES val:33 [ 31.005275] BUG: Bad rss-counter state mm:000000005cfb5b03 type:MM_ANONPAGES val:22 [ 31.179592] ================================================================== [ 31.180816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.182397] Read of size 8 at addr ffff88800e030880 by task sshd/220 [ 31.183241] [ 31.183468] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.184324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.185437] Call Trace: [ 31.185803] <TASK> [ 31.186133] dump_stack_lvl+0x91/0xf0 [ 31.186718] print_report+0xcc/0x620 [ 31.187277] ? __virt_addr_valid+0x102/0x340 [ 31.187904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189295] kasan_report+0xbe/0xf0 [ 31.189845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190564] vma_interval_tree_remove+0xc75/0xec0 [ 31.191256] vma_prepare+0xc54/0x11a0 [ 31.191809] __split_vma+0x5af/0x950 [ 31.192340] ? __pfx___split_vma+0x10/0x10 [ 31.192955] ? find_held_lock+0x2c/0x110 [ 31.193562] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.194194] ? lock_is_held_type+0x9f/0x120 [ 31.194818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.195544] ? mtree_range_walk+0x632/0x900 [ 31.196168] ? mas_walk+0x5c7/0x7c0 [ 31.196724] do_vmi_munmap+0x1f1/0x2b0 [ 31.197275] mmap_region+0x1f9/0x2660 [ 31.197828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.198412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.199232] ? __pfx_lock_acquire+0x10/0x10 [ 31.199840] ? __pfx_mmap_region+0x10/0x10 [ 31.200448] ? security_mmap_addr+0x7d/0xa0 [ 31.201048] ? get_unmapped_area+0x1f5/0x3f0 [ 31.201681] do_mmap+0x854/0xf00 [ 31.202172] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.202748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.203401] ksys_mmap_pgoff+0x3af/0x500 [ 31.203980] do_syscall_64+0x3f/0x90 [ 31.204533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.205271] RIP: 0033:0x7f77794f1d82 [ 31.205794] 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 [ 31.208207] RSP: 002b:00007fffda56b098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77794f1d82 [ 31.210183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f777892b000 [ 31.211149] RBP: 00007f777892b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.212102] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c4bf25b20 [ 31.213060] R13: 00007fffda56b0b0 R14: 00007fffda56b0e0 R15: 00007fffda56b440 [ 31.214015] </TASK> [ 31.214340] [ 31.214596] Allocated by task 213: [ 31.215099] kasan_save_stack+0x22/0x50 [ 31.215683] kasan_set_track+0x25/0x30 [ 31.216242] __kasan_slab_alloc+0x59/0x70 [ 31.216835] kmem_cache_alloc+0x16b/0x370 [ 31.217408] vm_area_dup+0x20/0x160 [ 31.217918] __split_vma+0x170/0x950 [ 31.218444] split_vma+0xc6/0x110 [ 31.218937] mprotect_fixup+0x8d2/0xb30 [ 31.219511] do_mprotect_pkey+0x87e/0xd40 [ 31.220083] __x64_sys_mprotect+0x78/0xc0 [ 31.220664] do_syscall_64+0x3f/0x90 [ 31.221189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221910] [ 31.222147] Freed by task 202: [ 31.222646] kasan_save_stack+0x22/0x50 [ 31.223351] kasan_set_track+0x25/0x30 [ 31.223907] kasan_save_free_info+0x2b/0x50 [ 31.224511] __kasan_slab_free+0x10a/0x190 [ 31.225097] kmem_cache_free+0x10d/0x4d0 [ 31.225669] rcu_core+0x8c8/0x2860 [ 31.226162] __do_softirq+0x1b7/0x7d4 [ 31.226700] [ 31.226941] Last potentially related work creation: [ 31.227617] kasan_save_stack+0x22/0x50 [ 31.228174] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229530] remove_vma+0x139/0x170 [ 31.230025] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230644] do_vmi_munmap+0x1f1/0x2b0 [ 31.231202] __vm_munmap+0x138/0x3a0 [ 31.231735] __x64_sys_munmap+0x59/0x80 [ 31.232286] do_syscall_64+0x3f/0x90 [ 31.232824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233534] [ 31.233767] The buggy address belongs to the object at ffff88800e030828 [ 31.233767] which belongs to the cache vm_area_struct of size 168 [ 31.235396] The buggy address is located 88 bytes inside of [ 31.235396] freed 168-byte region [ffff88800e030828, ffff88800e0308d0) [ 31.236950] [ 31.237187] The buggy address belongs to the physical page: [ 31.237908] page:0000000046400295 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe030 [ 31.239135] memcg:ffff88800e230101 [ 31.239651] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240376] page_type: 0xffffffff() [ 31.240886] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4740 dead000000000004 [ 31.241934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e230101 [ 31.242956] page dumped because: kasan: bad access detected [ 31.243713] [ 31.243952] Memory state around the buggy address: [ 31.244596] ffff88800e030780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.245544] ffff88800e030800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.246483] >ffff88800e030880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.247423] ^ [ 31.247874] ffff88800e030900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248834] ffff88800e030980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.249754] ================================================================== [ 31.250808] Disabling lock debugging due to kernel taint [ 33.291731] BUG: Bad rss-counter state mm:000000003e530f7e type:MM_FILEPAGES val:33 [ 33.292977] BUG: Bad rss-counter state mm:000000003e530f7e type:MM_ANONPAGES val:22 [ 33.664743] BUG: Bad rss-counter state mm:00000000e667f5d8 type:MM_FILEPAGES val:33 [ 33.666053] BUG: Bad rss-counter state mm:00000000e667f5d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54578' (ECDSA) to the list of known hosts. 2023/06/21 04:15:21 fuzzer started 2023/06/21 04:15:21 dialing manager at localhost:36067 2023/06/21 04:15:21 checking machine... 2023/06/21 04:15:21 checking revisions... [ 34.399194] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:15:21 testing simple program... [ 34.441828] cgroup: Unknown subsys name 'net' [ 34.478047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff818088f6 RDX=0000000000000010 RSI=ffffffff8613873c RDI=ffffffff85dfdb3c RBP=ffffffff85dfdb3c RSP=ffff8880182b7978 R8 =ffffffff8613873c R9 =ffff8880182b7a70 R10=0000000000038001 R11=0000000000020c5e R12=ffffffff85dfdb4c R13=ffffffff85dfdb3c R14=ffffffff85dfdb3c R15=dffffc0000000000 RIP=ffffffff8112fc64 RFL=00000256 [---ZAP-] 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 00007f67348b0900 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=00007ffd312e6000 CR3=000000000e988000 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=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 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=0000000000000001 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=00007fe2e9972f80 CR3=0000000015cae000 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=2031323a35313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a35313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000