syzkaller login: [ 30.955541] BUG: Bad rss-counter state mm:00000000c9aa567f type:MM_FILEPAGES val:33 [ 30.957239] BUG: Bad rss-counter state mm:00000000c9aa567f type:MM_ANONPAGES val:22 [ 31.125040] ================================================================== [ 31.126217] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.127370] Read of size 8 at addr ffff88800e849228 by task sshd/221 [ 31.128402] [ 31.128667] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.129732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.130947] Call Trace: [ 31.131340] [ 31.131687] dump_stack_lvl+0x91/0xf0 [ 31.132287] print_report+0xcc/0x620 [ 31.132877] ? __virt_addr_valid+0x102/0x340 [ 31.133573] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.134317] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.135068] kasan_report+0xbe/0xf0 [ 31.135647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.136391] vma_interval_tree_remove+0xc75/0xec0 [ 31.137138] vma_prepare+0xc54/0x11a0 [ 31.137716] __split_vma+0x5af/0x950 [ 31.138297] ? __pfx___split_vma+0x10/0x10 [ 31.138940] ? find_held_lock+0x2c/0x110 [ 31.139562] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.140248] ? lock_is_held_type+0x9f/0x120 [ 31.140906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.141653] ? mtree_range_walk+0x632/0x900 [ 31.142325] ? mas_walk+0x5c7/0x7c0 [ 31.142905] do_vmi_munmap+0x1f1/0x2b0 [ 31.143491] mmap_region+0x1f9/0x2660 [ 31.144065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.144674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.145562] ? __pfx_lock_acquire+0x10/0x10 [ 31.146211] ? __pfx_mmap_region+0x10/0x10 [ 31.146851] ? security_mmap_addr+0x7d/0xa0 [ 31.147489] ? get_unmapped_area+0x1f5/0x3f0 [ 31.148156] do_mmap+0x854/0xf00 [ 31.148691] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.149292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.149980] ksys_mmap_pgoff+0x3af/0x500 [ 31.150600] do_syscall_64+0x3f/0x90 [ 31.151186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151857] RIP: 0033:0x7f344e14ed82 [ 31.152289] 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 [ 31.154274] RSP: 002b:00007ffc165d1388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.155116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f344e14ed82 [ 31.155915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f344d588000 [ 31.156701] RBP: 00007f344d588000 R08: 0000000000000009 R09: 0000000000001000 [ 31.157505] R10: 0000000000000812 R11: 0000000000000206 R12: 000055640b1acec0 [ 31.158296] R13: 00007ffc165d13a0 R14: 00007ffc165d13d0 R15: 00007ffc165d1730 [ 31.159104] [ 31.159383] [ 31.159587] Allocated by task 213: [ 31.159994] kasan_save_stack+0x22/0x50 [ 31.160467] kasan_set_track+0x25/0x30 [ 31.160940] __kasan_slab_alloc+0x59/0x70 [ 31.161439] kmem_cache_alloc+0x16b/0x370 [ 31.161942] vm_area_dup+0x20/0x160 [ 31.162392] __split_vma+0x170/0x950 [ 31.162851] split_vma+0xc6/0x110 [ 31.163279] mprotect_fixup+0x8d2/0xb30 [ 31.163774] do_mprotect_pkey+0x87e/0xd40 [ 31.164293] __x64_sys_mprotect+0x78/0xc0 [ 31.164808] do_syscall_64+0x3f/0x90 [ 31.165282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165903] [ 31.166117] Freed by task 203: [ 31.166490] kasan_save_stack+0x22/0x50 [ 31.166988] kasan_set_track+0x25/0x30 [ 31.167476] kasan_save_free_info+0x2b/0x50 [ 31.167989] __kasan_slab_free+0x10a/0x190 [ 31.168506] kmem_cache_free+0x10d/0x4d0 [ 31.169020] rcu_core+0x8c8/0x2860 [ 31.169453] __do_softirq+0x1b7/0x7d4 [ 31.169919] [ 31.170125] Last potentially related work creation: [ 31.170687] kasan_save_stack+0x22/0x50 [ 31.171187] __kasan_record_aux_stack+0x8e/0xa0 [ 31.171744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.172381] remove_vma+0x139/0x170 [ 31.172828] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.173381] do_vmi_munmap+0x1f1/0x2b0 [ 31.173856] __vm_munmap+0x138/0x3a0 [ 31.174318] __x64_sys_munmap+0x59/0x80 [ 31.174800] do_syscall_64+0x3f/0x90 [ 31.175260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175893] [ 31.176111] The buggy address belongs to the object at ffff88800e8491d0 [ 31.176111] which belongs to the cache vm_area_struct of size 168 [ 31.177569] The buggy address is located 88 bytes inside of [ 31.177569] freed 168-byte region [ffff88800e8491d0, ffff88800e849278) [ 31.178962] [ 31.179168] The buggy address belongs to the physical page: [ 31.179813] page:000000003a5f1f46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe849 [ 31.180867] memcg:ffff8880068f9b01 [ 31.181286] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.181913] page_type: 0xffffffff() [ 31.182349] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.183238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880068f9b01 [ 31.184134] page dumped because: kasan: bad access detected [ 31.184774] [ 31.184981] Memory state around the buggy address: [ 31.185563] ffff88800e849100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.186404] ffff88800e849180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.187244] >ffff88800e849200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.188077] ^ [ 31.188630] ffff88800e849280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.189489] ffff88800e849300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.190322] ================================================================== [ 31.191275] Disabling lock debugging due to kernel taint [ 33.063626] BUG: Bad rss-counter state mm:000000008830ec62 type:MM_FILEPAGES val:33 [ 33.064527] BUG: Bad rss-counter state mm:000000008830ec62 type:MM_ANONPAGES val:22 [ 33.528865] BUG: Bad rss-counter state mm:0000000019d79f9c type:MM_FILEPAGES val:33 [ 33.529875] BUG: Bad rss-counter state mm:0000000019d79f9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10166' (ECDSA) to the list of known hosts. 2023/06/20 20:05:22 fuzzer started 2023/06/20 20:05:22 dialing manager at localhost:36067 2023/06/20 20:05:22 checking machine... 2023/06/20 20:05:22 checking revisions... [ 34.271300] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:05:22 testing simple program... [ 34.321524] cgroup: Unknown subsys name 'net' [ 34.371445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:21 Registers: info registers vcpu 0 RAX=00000000000000e6 RBX=ffff888009b9f400 RCX=0000000000000000 RDX=ffff88800beb77f4 RSI=ffffffff83c5673c RDI=ffff88800beb77f4 RBP=0000000000000002 RSP=ffff8880194774a8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800beb7780 R13=0000000000000014 R14=ffff888019477728 R15=0000000064920681 RIP=ffffffff83c56801 RFL=00000246 [---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 00007f8e870a0900 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=00007f8e87657618 CR3=000000000ee88000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f2dfbc4b570 CR3=000000000dc12000 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=2031323a35303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a35303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000