syzkaller login: [ 39.989956] BUG: Bad rss-counter state mm:00000000927e245b type:MM_FILEPAGES val:33 [ 39.991131] BUG: Bad rss-counter state mm:00000000927e245b type:MM_ANONPAGES val:22 [ 40.125680] ================================================================== [ 40.126748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.127868] Read of size 8 at addr ffff88801acb4d08 by task sshd/220 [ 40.128986] [ 40.129264] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.130141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.131152] Call Trace: [ 40.131513] [ 40.131871] dump_stack_lvl+0x91/0xf0 [ 40.132526] print_report+0xcc/0x620 [ 40.133116] ? __virt_addr_valid+0x102/0x340 [ 40.133768] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.134520] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.135261] kasan_report+0xbe/0xf0 [ 40.135850] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.136599] vma_interval_tree_remove+0xc75/0xec0 [ 40.137338] vma_prepare+0xc54/0x11a0 [ 40.137926] __split_vma+0x5af/0x950 [ 40.138490] ? __pfx___split_vma+0x10/0x10 [ 40.139137] ? find_held_lock+0x2c/0x110 [ 40.139761] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.140473] ? lock_is_held_type+0x9f/0x120 [ 40.141126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.141769] ? mtree_range_walk+0x632/0x900 [ 40.142346] ? mas_walk+0x5c7/0x7c0 [ 40.142844] do_vmi_munmap+0x1f1/0x2b0 [ 40.143337] mmap_region+0x1f9/0x2660 [ 40.143839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.144353] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.145096] ? __pfx_lock_acquire+0x10/0x10 [ 40.145633] ? __pfx_mmap_region+0x10/0x10 [ 40.146175] ? security_mmap_addr+0x7d/0xa0 [ 40.146709] ? get_unmapped_area+0x1f5/0x3f0 [ 40.147276] do_mmap+0x854/0xf00 [ 40.147713] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.148250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.148849] ksys_mmap_pgoff+0x3af/0x500 [ 40.149368] do_syscall_64+0x3f/0x90 [ 40.149860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.150506] RIP: 0033:0x7f96f1287d82 [ 40.150974] 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 [ 40.153145] RSP: 002b:00007fffc44fc4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.154067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96f1287d82 [ 40.154929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96f06c1000 [ 40.155778] RBP: 00007f96f06c1000 R08: 0000000000000009 R09: 0000000000001000 [ 40.156653] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efc7733ec0 [ 40.157520] R13: 00007fffc44fc4e0 R14: 00007fffc44fc510 R15: 00007fffc44fc870 [ 40.158396] [ 40.158689] [ 40.158916] Allocated by task 213: [ 40.159346] kasan_save_stack+0x22/0x50 [ 40.159868] kasan_set_track+0x25/0x30 [ 40.160388] __kasan_slab_alloc+0x59/0x70 [ 40.160938] kmem_cache_alloc+0x16b/0x370 [ 40.161460] vm_area_dup+0x20/0x160 [ 40.161930] __split_vma+0x170/0x950 [ 40.162409] split_vma+0xc6/0x110 [ 40.162860] mprotect_fixup+0x8d2/0xb30 [ 40.163370] do_mprotect_pkey+0x87e/0xd40 [ 40.163911] __x64_sys_mprotect+0x78/0xc0 [ 40.164454] do_syscall_64+0x3f/0x90 [ 40.164944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.165596] [ 40.165823] Freed by task 19: [ 40.166207] kasan_save_stack+0x22/0x50 [ 40.166710] kasan_set_track+0x25/0x30 [ 40.167215] kasan_save_free_info+0x2b/0x50 [ 40.167750] __kasan_slab_free+0x10a/0x190 [ 40.168301] kmem_cache_free+0x10d/0x4d0 [ 40.168862] rcu_core+0x8c8/0x2860 [ 40.169314] __do_softirq+0x1b7/0x7d4 [ 40.169805] [ 40.170100] Last potentially related work creation: [ 40.170793] kasan_save_stack+0x22/0x50 [ 40.171313] __kasan_record_aux_stack+0x8e/0xa0 [ 40.171920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.172590] remove_vma+0x139/0x170 [ 40.173057] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.173612] do_vmi_munmap+0x1f1/0x2b0 [ 40.174120] __vm_munmap+0x138/0x3a0 [ 40.174588] __x64_sys_munmap+0x59/0x80 [ 40.175107] do_syscall_64+0x3f/0x90 [ 40.175580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.176241] [ 40.176467] The buggy address belongs to the object at ffff88801acb4cb0 [ 40.176467] which belongs to the cache vm_area_struct of size 168 [ 40.177947] The buggy address is located 88 bytes inside of [ 40.177947] freed 168-byte region [ffff88801acb4cb0, ffff88801acb4d58) [ 40.179361] [ 40.179582] The buggy address belongs to the physical page: [ 40.180251] page:000000005ff2958a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1acb4 [ 40.181397] memcg:ffff88800f185e01 [ 40.181837] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.182490] page_type: 0xffffffff() [ 40.182959] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.183891] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f185e01 [ 40.184815] page dumped because: kasan: bad access detected [ 40.185477] [ 40.185693] Memory state around the buggy address: [ 40.186287] ffff88801acb4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 40.187153] ffff88801acb4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.188028] >ffff88801acb4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.188927] ^ [ 40.189367] ffff88801acb4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.190234] ffff88801acb4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.191096] ================================================================== [ 40.192026] Disabling lock debugging due to kernel taint [ 42.189640] BUG: Bad rss-counter state mm:00000000d4fd3ae2 type:MM_FILEPAGES val:33 [ 42.190631] BUG: Bad rss-counter state mm:00000000d4fd3ae2 type:MM_ANONPAGES val:22 [ 42.668823] BUG: Bad rss-counter state mm:00000000b90161b4 type:MM_FILEPAGES val:33 [ 42.669799] BUG: Bad rss-counter state mm:00000000b90161b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37227' (ECDSA) to the list of known hosts. 2023/06/20 05:33:42 fuzzer started 2023/06/20 05:33:42 dialing manager at localhost:44161 2023/06/20 05:33:42 checking machine... 2023/06/20 05:33:42 checking revisions... [ 43.419315] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:33:42 testing simple program... [ 43.463260] cgroup: Unknown subsys name 'net' [ 43.514366] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:40 Registers: info registers vcpu 0 RAX=0000000000000018 RBX=0000000000000018 RCX=ffffffff8449f02b RDX=ffff8880158c51c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801bf00008 RSP=ffff888015ab7ce0 R8 =0000000000000006 R9 =00007ffcb636595c R10=00007f318b41dfff R11=0000000000000000 R12=0000000000000002 R13=0000000000000008 R14=00007ffcb636595c R15=00007f318b41dfff RIP=ffffffff814c07e0 RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f318ae5e900 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=00007ffcb636595c CR3=00000000144ca000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=601a7884cf4991995fd034452184d119 XMM04=9241632e88462a7cb504bbf7431890bc XMM05=00000000000000000000000000000000 XMM06=601a632e88462a7c5f04344521189019 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f266cf0f440 CR3=000000000ca8c000 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=be18c0628e23a791494a921c2eba408d XMM02=2c67c8bc2e329bc3000000000011d740 XMM03=fb795ef6d65770560000000000124100 XMM04=73a1bc1c2334187100000000000ae988 XMM05=19e9129bd510f23500000000001339b8 XMM06=fc6326b16e04615b0000000000132b90 XMM07=e042d86d42eb936e0000000000124380 XMM08=e84a5ebbfc49060a000000000011d7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000