syzkaller login: [ 31.431018] BUG: Bad rss-counter state mm:00000000cf4609e7 type:MM_FILEPAGES val:33 [ 31.431838] BUG: Bad rss-counter state mm:00000000cf4609e7 type:MM_ANONPAGES val:22 [ 31.465213] ================================================================== [ 31.465911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.466548] Read of size 8 at addr ffff88800c54aed8 by task sshd/220 [ 31.467070] [ 31.467282] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.467868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.468544] Call Trace: [ 31.468783] [ 31.468991] dump_stack_lvl+0x91/0xf0 [ 31.469329] print_report+0xcc/0x620 [ 31.469659] ? __virt_addr_valid+0x102/0x340 [ 31.470033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470469] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470890] kasan_report+0xbe/0xf0 [ 31.471280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471712] vma_interval_tree_remove+0xc75/0xec0 [ 31.472128] vma_prepare+0xc54/0x11a0 [ 31.472462] __split_vma+0x5af/0x950 [ 31.472794] ? __pfx___split_vma+0x10/0x10 [ 31.473164] ? find_held_lock+0x2c/0x110 [ 31.473523] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.473923] ? lock_is_held_type+0x9f/0x120 [ 31.474311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.474733] ? mtree_range_walk+0x632/0x900 [ 31.475157] ? mas_walk+0x5c7/0x7c0 [ 31.475481] do_vmi_munmap+0x1f1/0x2b0 [ 31.475818] mmap_region+0x1f9/0x2660 [ 31.476141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.476479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.476979] ? __pfx_lock_acquire+0x10/0x10 [ 31.477365] ? __pfx_mmap_region+0x10/0x10 [ 31.477740] ? security_mmap_addr+0x7d/0xa0 [ 31.478109] ? get_unmapped_area+0x1f5/0x3f0 [ 31.478490] do_mmap+0x854/0xf00 [ 31.478803] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.479214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.479582] ksys_mmap_pgoff+0x3af/0x500 [ 31.479902] do_syscall_64+0x3f/0x90 [ 31.480220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.480630] RIP: 0033:0x7f4fa3544d82 [ 31.480936] 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 [ 31.482407] RSP: 002b:00007ffc25d6dd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.483022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fa3544d82 [ 31.483623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fa297e000 [ 31.484226] RBP: 00007f4fa297e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.484786] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a689b69ec0 [ 31.485394] R13: 00007ffc25d6dd80 R14: 00007ffc25d6ddb0 R15: 00007ffc25d6e110 [ 31.485989] [ 31.486193] [ 31.486340] Allocated by task 213: [ 31.486640] kasan_save_stack+0x22/0x50 [ 31.486995] kasan_set_track+0x25/0x30 [ 31.487387] __kasan_slab_alloc+0x59/0x70 [ 31.487742] kmem_cache_alloc+0x16b/0x370 [ 31.488102] vm_area_dup+0x20/0x160 [ 31.488406] __split_vma+0x170/0x950 [ 31.488696] split_vma+0xc6/0x110 [ 31.488962] mprotect_fixup+0x8d2/0xb30 [ 31.489288] do_mprotect_pkey+0x87e/0xd40 [ 31.489641] __x64_sys_mprotect+0x78/0xc0 [ 31.489996] do_syscall_64+0x3f/0x90 [ 31.490303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.490738] [ 31.490890] Freed by task 213: [ 31.491204] kasan_save_stack+0x22/0x50 [ 31.491566] kasan_set_track+0x25/0x30 [ 31.491905] kasan_save_free_info+0x2b/0x50 [ 31.492266] __kasan_slab_free+0x10a/0x190 [ 31.492623] kmem_cache_free+0x10d/0x4d0 [ 31.492964] rcu_core+0x8c8/0x2860 [ 31.493277] __do_softirq+0x1b7/0x7d4 [ 31.493618] [ 31.493761] Last potentially related work creation: [ 31.494331] kasan_save_stack+0x22/0x50 [ 31.494718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.495166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.495653] remove_vma+0x139/0x170 [ 31.495967] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.496375] do_vmi_munmap+0x1f1/0x2b0 [ 31.496706] __vm_munmap+0x138/0x3a0 [ 31.497016] __x64_sys_munmap+0x59/0x80 [ 31.497384] do_syscall_64+0x3f/0x90 [ 31.497698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498134] [ 31.498282] The buggy address belongs to the object at ffff88800c54ae80 [ 31.498282] which belongs to the cache vm_area_struct of size 168 [ 31.499321] The buggy address is located 88 bytes inside of [ 31.499321] freed 168-byte region [ffff88800c54ae80, ffff88800c54af28) [ 31.500291] [ 31.500431] The buggy address belongs to the physical page: [ 31.500863] page:00000000fb798880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc54a [ 31.501582] memcg:ffff88800e142f01 [ 31.501859] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.502295] page_type: 0xffffffff() [ 31.502635] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.503346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e142f01 [ 31.503972] page dumped because: kasan: bad access detected [ 31.504451] [ 31.504596] Memory state around the buggy address: [ 31.504994] ffff88800c54ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.505577] ffff88800c54ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.506156] >ffff88800c54ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.506746] ^ [ 31.507302] ffff88800c54af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.507888] ffff88800c54af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.508479] ================================================================== [ 31.509353] Disabling lock debugging due to kernel taint [ 33.312133] BUG: Bad rss-counter state mm:00000000f1d7027e type:MM_FILEPAGES val:33 [ 33.312760] BUG: Bad rss-counter state mm:00000000f1d7027e type:MM_ANONPAGES val:22 [ 33.694329] BUG: Bad rss-counter state mm:00000000fc313548 type:MM_FILEPAGES val:33 [ 33.695173] BUG: Bad rss-counter state mm:00000000fc313548 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53029' (ECDSA) to the list of known hosts. 2023/06/21 08:31:57 fuzzer started 2023/06/21 08:31:57 dialing manager at localhost:36067 2023/06/21 08:31:57 checking machine... 2023/06/21 08:31:57 checking revisions... [ 34.311770] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:31:57 testing simple program... [ 34.346766] cgroup: Unknown subsys name 'net' [ 34.392255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:31:57 Registers: info registers vcpu 0 RAX=0000000000000021 RBX=00007fffe0dcc280 RCX=0000558d970df810 RDX=0000000000000000 RSI=00007fffe0dcc120 RDI=0000000000000021 RBP=00007fffe0dcc3b0 RSP=00007fffe0dcc120 R8 =0000000000000000 R9 =00007fffe0dcc2b0 R10=000000000000002c R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002c R15=0000000000000000 RIP=00007f059e951be4 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f059ddc6900 00000000 00000000 GS =0000 0000000000000000 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=0000558d970debec CR3=0000000010158000 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=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 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=00007fbf080106e0 CR3=0000000015bc8000 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=2036353a31333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a31333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000