syzkaller login: [ 39.906332] BUG: Bad rss-counter state mm:00000000b9617564 type:MM_FILEPAGES val:33 [ 39.907357] BUG: Bad rss-counter state mm:00000000b9617564 type:MM_ANONPAGES val:22 [ 40.113846] ================================================================== [ 40.114596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.115281] Read of size 8 at addr ffff88800cc6da50 by task sshd/218 [ 40.115847] [ 40.116007] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.116639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.117347] Call Trace: [ 40.117582] [ 40.117802] dump_stack_lvl+0x91/0xf0 [ 40.118164] print_report+0xcc/0x620 [ 40.118519] ? __virt_addr_valid+0x102/0x340 [ 40.118992] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.119444] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.119892] kasan_report+0xbe/0xf0 [ 40.120241] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.120694] vma_interval_tree_remove+0xc75/0xec0 [ 40.121135] vma_prepare+0xc54/0x11a0 [ 40.121491] __split_vma+0x5af/0x950 [ 40.121855] ? __pfx___split_vma+0x10/0x10 [ 40.122233] ? find_held_lock+0x2c/0x110 [ 40.122577] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.122950] ? lock_is_held_type+0x9f/0x120 [ 40.123304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.123704] ? mtree_range_walk+0x632/0x900 [ 40.124072] ? mas_walk+0x5c7/0x7c0 [ 40.124387] do_vmi_munmap+0x1f1/0x2b0 [ 40.124710] mmap_region+0x1f9/0x2660 [ 40.125030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.125371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.125848] ? __pfx_lock_acquire+0x10/0x10 [ 40.126201] ? __pfx_mmap_region+0x10/0x10 [ 40.126551] ? security_mmap_addr+0x7d/0xa0 [ 40.126904] ? get_unmapped_area+0x1f5/0x3f0 [ 40.127267] do_mmap+0x854/0xf00 [ 40.127557] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.127881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.128251] ksys_mmap_pgoff+0x3af/0x500 [ 40.128586] do_syscall_64+0x3f/0x90 [ 40.128901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.129328] RIP: 0033:0x7fca2fd44d82 [ 40.129629] 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 [ 40.131033] RSP: 002b:00007fffb995d4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.131627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca2fd44d82 [ 40.132183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca2f17e000 [ 40.132742] RBP: 00007fca2f17e000 R08: 0000000000000009 R09: 0000000000001000 [ 40.133295] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590bf439ec0 [ 40.133877] R13: 00007fffb995d500 R14: 00007fffb995d530 R15: 00007fffb995d890 [ 40.134439] [ 40.134634] [ 40.134776] Allocated by task 211: [ 40.135058] kasan_save_stack+0x22/0x50 [ 40.135395] kasan_set_track+0x25/0x30 [ 40.135723] __kasan_slab_alloc+0x59/0x70 [ 40.136070] kmem_cache_alloc+0x16b/0x370 [ 40.136410] vm_area_dup+0x20/0x160 [ 40.136709] __split_vma+0x170/0x950 [ 40.137018] split_vma+0xc6/0x110 [ 40.137303] mprotect_fixup+0x8d2/0xb30 [ 40.137634] do_mprotect_pkey+0x87e/0xd40 [ 40.137981] __x64_sys_mprotect+0x78/0xc0 [ 40.138327] do_syscall_64+0x3f/0x90 [ 40.138641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.139064] [ 40.139206] Freed by task 13: [ 40.139464] kasan_save_stack+0x22/0x50 [ 40.139796] kasan_set_track+0x25/0x30 [ 40.140125] kasan_save_free_info+0x2b/0x50 [ 40.140480] __kasan_slab_free+0x10a/0x190 [ 40.140840] kmem_cache_free+0x10d/0x4d0 [ 40.141195] rcu_core+0x8c8/0x2860 [ 40.141498] __do_softirq+0x1b7/0x7d4 [ 40.141843] [ 40.141992] Last potentially related work creation: [ 40.142398] kasan_save_stack+0x22/0x50 [ 40.142746] __kasan_record_aux_stack+0x8e/0xa0 [ 40.143146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.143587] remove_vma+0x139/0x170 [ 40.143901] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.144283] do_vmi_munmap+0x1f1/0x2b0 [ 40.144618] __vm_munmap+0x138/0x3a0 [ 40.144939] __x64_sys_munmap+0x59/0x80 [ 40.145283] do_syscall_64+0x3f/0x90 [ 40.145610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.146056] [ 40.146212] The buggy address belongs to the object at ffff88800cc6d9f8 [ 40.146212] which belongs to the cache vm_area_struct of size 168 [ 40.147227] The buggy address is located 88 bytes inside of [ 40.147227] freed 168-byte region [ffff88800cc6d9f8, ffff88800cc6daa0) [ 40.148208] [ 40.148355] The buggy address belongs to the physical page: [ 40.148812] page:00000000508531db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc6d [ 40.149564] memcg:ffff88800e3fda01 [ 40.149876] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.150361] page_type: 0xffffffff() [ 40.150674] raw: 0100000000000200 ffff88800879fc80 ffffea000035f8c0 dead000000000007 [ 40.151312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3fda01 [ 40.151943] page dumped because: kasan: bad access detected [ 40.152400] [ 40.152548] Memory state around the buggy address: [ 40.152951] ffff88800cc6d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.153546] ffff88800cc6d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.154152] >ffff88800cc6da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.154738] ^ [ 40.155224] ffff88800cc6da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.155821] ffff88800cc6db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.156421] ================================================================== [ 40.157164] Disabling lock debugging due to kernel taint [ 41.857535] BUG: Bad rss-counter state mm:00000000c4c21faa type:MM_FILEPAGES val:33 [ 41.858587] BUG: Bad rss-counter state mm:00000000c4c21faa type:MM_ANONPAGES val:22 [ 42.419354] BUG: Bad rss-counter state mm:00000000cd2c1e95 type:MM_FILEPAGES val:33 [ 42.420372] BUG: Bad rss-counter state mm:00000000cd2c1e95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49784' (ECDSA) to the list of known hosts. 2023/06/20 02:39:42 fuzzer started 2023/06/20 02:39:42 dialing manager at localhost:44161 2023/06/20 02:39:42 checking machine... 2023/06/20 02:39:42 checking revisions... [ 43.044663] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:39:42 testing simple program... [ 43.088602] cgroup: Unknown subsys name 'net' [ 43.144091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801476f408 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000cc700000cc7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b930 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 00007f3b63ca2900 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=00007f3b64259618 CR3=000000000edb6000 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=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=00007f2415f09260 CR3=000000000e17c000 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=2031343a39333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000