syzkaller login: [ 93.652666] BUG: Bad rss-counter state mm:000000001b909de6 type:MM_FILEPAGES val:33 [ 93.653707] BUG: Bad rss-counter state mm:000000001b909de6 type:MM_ANONPAGES val:22 [ 93.819647] ================================================================== [ 93.820532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.821477] Read of size 8 at addr ffff88800c505df0 by task sshd/219 [ 93.822310] [ 93.822584] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.823599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.824572] Call Trace: [ 93.824889] [ 93.825170] dump_stack_lvl+0x91/0xf0 [ 93.825686] print_report+0xcc/0x620 [ 93.826165] ? __virt_addr_valid+0x102/0x340 [ 93.826722] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.827334] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.827953] kasan_report+0xbe/0xf0 [ 93.828428] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.829048] vma_interval_tree_remove+0xc75/0xec0 [ 93.829654] vma_prepare+0xc54/0x11a0 [ 93.830130] __split_vma+0x5af/0x950 [ 93.830603] ? __pfx___split_vma+0x10/0x10 [ 93.831129] ? find_held_lock+0x2c/0x110 [ 93.831649] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.832214] ? lock_is_held_type+0x9f/0x120 [ 93.832746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.833360] ? mtree_range_walk+0x632/0x900 [ 93.833907] ? mas_walk+0x5c7/0x7c0 [ 93.834377] do_vmi_munmap+0x1f1/0x2b0 [ 93.834869] mmap_region+0x1f9/0x2660 [ 93.835348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.835867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.836579] ? __pfx_lock_acquire+0x10/0x10 [ 93.837108] ? __pfx_mmap_region+0x10/0x10 [ 93.837659] ? security_mmap_addr+0x7d/0xa0 [ 93.838192] ? get_unmapped_area+0x1f5/0x3f0 [ 93.838740] do_mmap+0x854/0xf00 [ 93.839179] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.839675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.840244] ksys_mmap_pgoff+0x3af/0x500 [ 93.840749] do_syscall_64+0x3f/0x90 [ 93.841224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.841882] RIP: 0033:0x7f084d78fd82 [ 93.842334] 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 [ 93.844466] RSP: 002b:00007ffd54145fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.845383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f084d78fd82 [ 93.846242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f084cbc9000 [ 93.847097] RBP: 00007f084cbc9000 R08: 0000000000000009 R09: 0000000000001000 [ 93.847941] R10: 0000000000000812 R11: 0000000000000206 R12: 000055881c997ec0 [ 93.848791] R13: 00007ffd54145fc0 R14: 00007ffd54145ff0 R15: 00007ffd54146350 [ 93.849662] [ 93.849954] [ 93.850173] Allocated by task 212: [ 93.850597] kasan_save_stack+0x22/0x50 [ 93.851100] kasan_set_track+0x25/0x30 [ 93.851596] __kasan_slab_alloc+0x59/0x70 [ 93.852113] kmem_cache_alloc+0x16b/0x370 [ 93.852627] vm_area_dup+0x20/0x160 [ 93.853076] __split_vma+0x170/0x950 [ 93.853545] split_vma+0xc6/0x110 [ 93.853980] mprotect_fixup+0x8d2/0xb30 [ 93.854477] do_mprotect_pkey+0x87e/0xd40 [ 93.855007] __x64_sys_mprotect+0x78/0xc0 [ 93.855524] do_syscall_64+0x3f/0x90 [ 93.855992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.856630] [ 93.856848] Freed by task 212: [ 93.857243] kasan_save_stack+0x22/0x50 [ 93.857770] kasan_set_track+0x25/0x30 [ 93.858264] kasan_save_free_info+0x2b/0x50 [ 93.858795] __kasan_slab_free+0x10a/0x190 [ 93.859330] kmem_cache_free+0x10d/0x4d0 [ 93.859832] rcu_core+0x8c8/0x2860 [ 93.860279] __do_softirq+0x1b7/0x7d4 [ 93.860753] [ 93.860974] Last potentially related work creation: [ 93.861565] kasan_save_stack+0x22/0x50 [ 93.862064] __kasan_record_aux_stack+0x8e/0xa0 [ 93.862635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.863280] remove_vma+0x139/0x170 [ 93.863731] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.864291] do_vmi_munmap+0x1f1/0x2b0 [ 93.864773] __vm_munmap+0x138/0x3a0 [ 93.865246] __x64_sys_munmap+0x59/0x80 [ 93.865752] do_syscall_64+0x3f/0x90 [ 93.866219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.866854] [ 93.867076] The buggy address belongs to the object at ffff88800c505d98 [ 93.867076] which belongs to the cache vm_area_struct of size 168 [ 93.868530] The buggy address is located 88 bytes inside of [ 93.868530] freed 168-byte region [ffff88800c505d98, ffff88800c505e40) [ 93.869944] [ 93.870158] The buggy address belongs to the physical page: [ 93.870814] page:000000009d395f94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc505 [ 93.871895] memcg:ffff88800de4c901 [ 93.872325] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 93.873031] page_type: 0xffffffff() [ 93.873490] raw: 0100000000000200 ffff88800879fc80 ffffea0000393500 dead000000000003 [ 93.874412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de4c901 [ 93.875313] page dumped because: kasan: bad access detected [ 93.875971] [ 93.876186] Memory state around the buggy address: [ 93.876766] ffff88800c505c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 93.877634] ffff88800c505d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 93.878494] >ffff88800c505d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 93.879339] ^ [ 93.880145] ffff88800c505e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 93.881009] ffff88800c505e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 93.881866] ================================================================== [ 93.883022] Disabling lock debugging due to kernel taint [ 95.795377] BUG: Bad rss-counter state mm:000000008506cbb6 type:MM_FILEPAGES val:33 [ 95.796644] BUG: Bad rss-counter state mm:000000008506cbb6 type:MM_ANONPAGES val:22 [ 96.186025] BUG: Bad rss-counter state mm:000000003c96ab12 type:MM_FILEPAGES val:33 [ 96.187293] BUG: Bad rss-counter state mm:000000003c96ab12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29909' (ECDSA) to the list of known hosts. 2023/06/19 13:00:47 fuzzer started 2023/06/19 13:00:47 dialing manager at localhost:44161 2023/06/19 13:00:47 checking machine... 2023/06/19 13:00:47 checking revisions... [ 96.818321] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:00:47 testing simple program... [ 96.879168] cgroup: Unknown subsys name 'net' [ 96.916150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe00e54518 CR3=0000000005482000 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=00007fd5465825100000556704796790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880094f32a8 RCX=ffffffff812e00e5 RDX=1ffff1100129e67c RSI=ffffffff87b86f80 RDI=ffff8880094f33e0 RBP=ffff8880094f34c0 RSP=ffff888008e57ce8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=0000000000000283 R13=ffff8880094f33d8 R14=ffffffff813782a8 R15=ffff88800d8a2e00 RIP=ffffffff8451365a RFL=00000046 [---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 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=00007f8442583618 CR3=000000000dbc4000 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=563412feff00545000000000000080fe 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