syzkaller login: [ 122.933876] BUG: Bad rss-counter state mm:0000000051681d27 type:MM_FILEPAGES val:33 [ 122.934980] BUG: Bad rss-counter state mm:0000000051681d27 type:MM_ANONPAGES val:22 [ 123.106223] ================================================================== [ 123.107111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 123.108035] Read of size 8 at addr ffff888006828798 by task sshd/218 [ 123.108790] [ 123.109006] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 123.110142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 123.111101] Call Trace: [ 123.111414] [ 123.111694] dump_stack_lvl+0x91/0xf0 [ 123.112188] print_report+0xcc/0x620 [ 123.112661] ? __virt_addr_valid+0x102/0x340 [ 123.113206] ? vma_interval_tree_remove+0xc75/0xec0 [ 123.113843] ? vma_interval_tree_remove+0xc75/0xec0 [ 123.114455] kasan_report+0xbe/0xf0 [ 123.114933] ? vma_interval_tree_remove+0xc75/0xec0 [ 123.115557] vma_interval_tree_remove+0xc75/0xec0 [ 123.116159] vma_prepare+0xc54/0x11a0 [ 123.116637] __split_vma+0x5af/0x950 [ 123.117107] ? __pfx___split_vma+0x10/0x10 [ 123.117642] ? find_held_lock+0x2c/0x110 [ 123.118165] do_vmi_align_munmap+0x2ba/0x11f0 [ 123.118724] ? lock_is_held_type+0x9f/0x120 [ 123.119260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 123.119870] ? mtree_range_walk+0x632/0x900 [ 123.120421] ? mas_walk+0x5c7/0x7c0 [ 123.120898] do_vmi_munmap+0x1f1/0x2b0 [ 123.121384] mmap_region+0x1f9/0x2660 [ 123.121878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 123.122388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 123.123103] ? __pfx_lock_acquire+0x10/0x10 [ 123.123635] ? __pfx_mmap_region+0x10/0x10 [ 123.124157] ? security_mmap_addr+0x7d/0xa0 [ 123.124685] ? get_unmapped_area+0x1f5/0x3f0 [ 123.125229] do_mmap+0x854/0xf00 [ 123.125687] vm_mmap_pgoff+0x1a6/0x3a0 [ 123.126183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 123.126738] ksys_mmap_pgoff+0x3af/0x500 [ 123.127241] do_syscall_64+0x3f/0x90 [ 123.127717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 123.128365] RIP: 0033:0x7f1e32910d82 [ 123.128815] 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 [ 123.130921] RSP: 002b:00007ffe28fb28a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 123.131814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e32910d82 [ 123.132651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e31d4a000 [ 123.133493] RBP: 00007f1e31d4a000 R08: 0000000000000009 R09: 0000000000001000 [ 123.134367] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b711cff70 [ 123.135209] R13: 00007ffe28fb28c0 R14: 00007ffe28fb28f0 R15: 00007ffe28fb2c50 [ 123.136061] [ 123.136351] [ 123.136564] Allocated by task 211: [ 123.136990] kasan_save_stack+0x22/0x50 [ 123.137494] kasan_set_track+0x25/0x30 [ 123.137989] __kasan_slab_alloc+0x59/0x70 [ 123.138508] kmem_cache_alloc+0x16b/0x370 [ 123.139022] vm_area_dup+0x20/0x160 [ 123.139479] __split_vma+0x170/0x950 [ 123.139940] split_vma+0xc6/0x110 [ 123.140377] mprotect_fixup+0x8d2/0xb30 [ 123.140875] do_mprotect_pkey+0x87e/0xd40 [ 123.141388] __x64_sys_mprotect+0x78/0xc0 [ 123.141909] do_syscall_64+0x3f/0x90 [ 123.142380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 123.143012] [ 123.143225] Freed by task 19: [ 123.143603] kasan_save_stack+0x22/0x50 [ 123.144099] kasan_set_track+0x25/0x30 [ 123.144588] kasan_save_free_info+0x2b/0x50 [ 123.145112] __kasan_slab_free+0x10a/0x190 [ 123.145663] kmem_cache_free+0x10d/0x4d0 [ 123.146161] rcu_core+0x8c8/0x2860 [ 123.146603] __do_softirq+0x1b7/0x7d4 [ 123.147077] [ 123.147289] Last potentially related work creation: [ 123.147871] kasan_save_stack+0x22/0x50 [ 123.148367] __kasan_record_aux_stack+0x8e/0xa0 [ 123.148937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 123.149570] remove_vma+0x139/0x170 [ 123.150023] do_vmi_align_munmap+0xd4a/0x11f0 [ 123.150579] do_vmi_munmap+0x1f1/0x2b0 [ 123.151067] __vm_munmap+0x138/0x3a0 [ 123.151535] __x64_sys_munmap+0x59/0x80 [ 123.152028] do_syscall_64+0x3f/0x90 [ 123.152504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 123.153136] [ 123.153349] The buggy address belongs to the object at ffff888006828740 [ 123.153349] which belongs to the cache vm_area_struct of size 168 [ 123.154815] The buggy address is located 88 bytes inside of [ 123.154815] freed 168-byte region [ffff888006828740, ffff8880068287e8) [ 123.156213] [ 123.156431] The buggy address belongs to the physical page: [ 123.157085] page:000000002c8afb63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6828 [ 123.158167] memcg:ffff88800f7f9301 [ 123.158591] flags: 0x100000000000200(slab|node=0|zone=1) [ 123.159221] page_type: 0xffffffff() [ 123.159666] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 123.160572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7f9301 [ 123.161458] page dumped because: kasan: bad access detected [ 123.162116] [ 123.162329] Memory state around the buggy address: [ 123.162901] ffff888006828680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 123.163749] ffff888006828700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 123.164598] >ffff888006828780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 123.165432] ^ [ 123.165949] ffff888006828800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 123.166793] ffff888006828880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 123.167636] ================================================================== [ 123.168606] Disabling lock debugging due to kernel taint [ 125.032251] BUG: Bad rss-counter state mm:00000000ab083c91 type:MM_FILEPAGES val:33 [ 125.033278] BUG: Bad rss-counter state mm:00000000ab083c91 type:MM_ANONPAGES val:22 [ 125.563344] BUG: Bad rss-counter state mm:0000000067d418ac type:MM_FILEPAGES val:33 [ 125.564524] BUG: Bad rss-counter state mm:0000000067d418ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22891' (ECDSA) to the list of known hosts. 2023/06/19 20:57:44 fuzzer started 2023/06/19 20:57:44 dialing manager at localhost:44161 2023/06/19 20:57:44 checking machine... 2023/06/19 20:57:44 checking revisions... [ 126.202175] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:44 testing simple program... [ 126.242223] cgroup: Unknown subsys name 'net' [ 126.294843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff11002cecfcf RDX=1ffff11002b74296 RSI=ffffffff811fc5b3 RDI=ffff888015ba14b0 RBP=ffff888015ba0000 RSP=ffff888016767f08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888016767f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8209ab94 RFL=00000286 [--S--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 00007fb109155900 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=00007fb10970a650 CR3=0000000018f2a000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007ffdfdf499b8 CR3=000000000ed46000 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=37353a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363131 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000