syzkaller login: [ 33.016165] BUG: Bad rss-counter state mm:00000000343697ab type:MM_FILEPAGES val:33 [ 33.017430] BUG: Bad rss-counter state mm:00000000343697ab type:MM_ANONPAGES val:22 [ 33.172258] ================================================================== [ 33.173333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.174434] Read of size 8 at addr ffff88800e664b38 by task sshd/221 [ 33.175481] [ 33.175753] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.176763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.177921] Call Trace: [ 33.178282] [ 33.178564] dump_stack_lvl+0x91/0xf0 [ 33.179056] print_report+0xcc/0x620 [ 33.179542] ? __virt_addr_valid+0x102/0x340 [ 33.180105] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.180726] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.181341] kasan_report+0xbe/0xf0 [ 33.181814] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.182434] vma_interval_tree_remove+0xc75/0xec0 [ 33.183053] vma_prepare+0xc54/0x11a0 [ 33.183539] __split_vma+0x5af/0x950 [ 33.184010] ? __pfx___split_vma+0x10/0x10 [ 33.184541] ? find_held_lock+0x2c/0x110 [ 33.185065] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.185625] ? lock_is_held_type+0x9f/0x120 [ 33.186165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.186770] ? mtree_range_walk+0x632/0x900 [ 33.187329] ? mas_walk+0x5c7/0x7c0 [ 33.187826] do_vmi_munmap+0x1f1/0x2b0 [ 33.188327] mmap_region+0x1f9/0x2660 [ 33.188813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.189325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.190042] ? __pfx_lock_acquire+0x10/0x10 [ 33.190571] ? __pfx_mmap_region+0x10/0x10 [ 33.191104] ? security_mmap_addr+0x7d/0xa0 [ 33.191641] ? get_unmapped_area+0x1f5/0x3f0 [ 33.192195] do_mmap+0x854/0xf00 [ 33.192636] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.193129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.193704] ksys_mmap_pgoff+0x3af/0x500 [ 33.194209] do_syscall_64+0x3f/0x90 [ 33.194688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.195327] RIP: 0033:0x7ff194baad82 [ 33.195806] 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 [ 33.197924] RSP: 002b:00007ffd9e81c678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.198826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff194baad82 [ 33.199682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff193fe4000 [ 33.200524] RBP: 00007ff193fe4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.201374] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9aaab7ec0 [ 33.202219] R13: 00007ffd9e81c690 R14: 00007ffd9e81c6c0 R15: 00007ffd9e81ca20 [ 33.203072] [ 33.203366] [ 33.203589] Allocated by task 213: [ 33.204023] kasan_save_stack+0x22/0x50 [ 33.204529] kasan_set_track+0x25/0x30 [ 33.205030] __kasan_slab_alloc+0x59/0x70 [ 33.205557] kmem_cache_alloc+0x16b/0x370 [ 33.206073] vm_area_dup+0x20/0x160 [ 33.206531] __split_vma+0x170/0x950 [ 33.207002] split_vma+0xc6/0x110 [ 33.207442] mprotect_fixup+0x8d2/0xb30 [ 33.207970] do_mprotect_pkey+0x87e/0xd40 [ 33.208497] __x64_sys_mprotect+0x78/0xc0 [ 33.209030] do_syscall_64+0x3f/0x90 [ 33.209502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.210152] [ 33.210365] Freed by task 213: [ 33.210775] kasan_save_stack+0x22/0x50 [ 33.211273] kasan_set_track+0x25/0x30 [ 33.211786] kasan_save_free_info+0x2b/0x50 [ 33.212336] __kasan_slab_free+0x10a/0x190 [ 33.212889] kmem_cache_free+0x10d/0x4d0 [ 33.213403] rcu_core+0x8c8/0x2860 [ 33.213844] __do_softirq+0x1b7/0x7d4 [ 33.214322] [ 33.214538] Last potentially related work creation: [ 33.215128] kasan_save_stack+0x22/0x50 [ 33.215655] __kasan_record_aux_stack+0x8e/0xa0 [ 33.216313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.216958] remove_vma+0x139/0x170 [ 33.217411] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.217968] do_vmi_munmap+0x1f1/0x2b0 [ 33.218460] __vm_munmap+0x138/0x3a0 [ 33.218931] __x64_sys_munmap+0x59/0x80 [ 33.219429] do_syscall_64+0x3f/0x90 [ 33.219917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.220556] [ 33.220775] The buggy address belongs to the object at ffff88800e664ae0 [ 33.220775] which belongs to the cache vm_area_struct of size 168 [ 33.222244] The buggy address is located 88 bytes inside of [ 33.222244] freed 168-byte region [ffff88800e664ae0, ffff88800e664b88) [ 33.223665] [ 33.223882] The buggy address belongs to the physical page: [ 33.224539] page:0000000097cc7629 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe664 [ 33.225617] memcg:ffff88800ec3ca01 [ 33.226047] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.226760] page_type: 0xffffffff() [ 33.227218] raw: 0100000000000200 ffff88800879fc80 ffffea000063c140 dead000000000007 [ 33.228156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec3ca01 [ 33.229067] page dumped because: kasan: bad access detected [ 33.229731] [ 33.229953] Memory state around the buggy address: [ 33.230534] ffff88800e664a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.231388] ffff88800e664a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.232266] >ffff88800e664b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.233110] ^ [ 33.233716] ffff88800e664b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.234566] ffff88800e664c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.235408] ================================================================== [ 33.236341] Disabling lock debugging due to kernel taint [ 36.141255] BUG: Bad rss-counter state mm:000000009c44833e type:MM_FILEPAGES val:33 [ 36.142678] BUG: Bad rss-counter state mm:000000009c44833e type:MM_ANONPAGES val:22 [ 36.543193] BUG: Bad rss-counter state mm:00000000255ab447 type:MM_FILEPAGES val:33 [ 36.544897] BUG: Bad rss-counter state mm:00000000255ab447 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65053' (ECDSA) to the list of known hosts. 2023/06/20 03:47:34 fuzzer started 2023/06/20 03:47:34 dialing manager at localhost:44161 2023/06/20 03:47:34 checking machine... 2023/06/20 03:47:34 checking revisions... [ 37.252758] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:47:34 testing simple program... [ 37.312278] cgroup: Unknown subsys name 'net' [ 37.369899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:47:29 Registers: info registers vcpu 0 RAX=1ffff110018ab917 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001cddcf2 RSI=ffff88800cf92658 RDI=ffff88800e6ee8c8 RBP=ffff88800e6ee8b8 RSP=ffff888014607548 R8 =0000000000000001 R9 =ffffed10028c0ea1 R10=0000000000000003 R11=00000000002a0000 R12=ffff88800c55c8b8 R13=fffffbfff0f70df0 R14=ffff88800cf92658 R15=ffffffff87b86f80 RIP=ffffffff844cc569 RFL=00000046 [---Z-P-] 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 00007f41f0b22900 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=00007f41eff1cf50 CR3=000000000c75c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ef10c7b99ac59cc000000000000ae988 XMM05=e22d03c36ab75faa0000000000133b08 XMM06=e4cb8bb95a7664b60000000000132c50 XMM07=fb795ef6d657705600000000001229b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020cb4 RBX=0000000000000002 RCX=ffffffff8180995c RDX=0000000000020cb9 RSI=0000000000008099 RDI=ffffffff86137022 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86137004 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130868 RFL=00000283 [--S---C] 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 00007fe40ef33900 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=00007ffe866fe000 CR3=000000000e966000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000