syzkaller login: [ 90.246158] BUG: Bad rss-counter state mm:00000000e8dba960 type:MM_FILEPAGES val:33 [ 90.247316] BUG: Bad rss-counter state mm:00000000e8dba960 type:MM_ANONPAGES val:22 [ 90.395616] ================================================================== [ 90.396677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 90.397661] Read of size 8 at addr ffff88801654e798 by task sshd/221 [ 90.398563] [ 90.398793] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 90.399882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.400939] Call Trace: [ 90.401275] [ 90.401580] dump_stack_lvl+0x91/0xf0 [ 90.402092] print_report+0xcc/0x620 [ 90.402598] ? __virt_addr_valid+0x102/0x340 [ 90.403176] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.403852] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.404499] kasan_report+0xbe/0xf0 [ 90.404995] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.405656] vma_interval_tree_remove+0xc75/0xec0 [ 90.406294] vma_prepare+0xc54/0x11a0 [ 90.406804] __split_vma+0x5af/0x950 [ 90.407310] ? __pfx___split_vma+0x10/0x10 [ 90.407884] ? find_held_lock+0x2c/0x110 [ 90.408444] do_vmi_align_munmap+0x2ba/0x11f0 [ 90.409053] ? lock_is_held_type+0x9f/0x120 [ 90.409642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 90.410282] ? mtree_range_walk+0x632/0x900 [ 90.410873] ? mas_walk+0x5c7/0x7c0 [ 90.411387] do_vmi_munmap+0x1f1/0x2b0 [ 90.411925] mmap_region+0x1f9/0x2660 [ 90.412446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 90.412991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 90.413750] ? __pfx_lock_acquire+0x10/0x10 [ 90.414312] ? __pfx_mmap_region+0x10/0x10 [ 90.414868] ? security_mmap_addr+0x7d/0xa0 [ 90.415426] ? get_unmapped_area+0x1f5/0x3f0 [ 90.416036] do_mmap+0x854/0xf00 [ 90.416504] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.417024] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 90.417617] ksys_mmap_pgoff+0x3af/0x500 [ 90.418149] do_syscall_64+0x3f/0x90 [ 90.418656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.419341] RIP: 0033:0x7f17e617cd82 [ 90.419829] 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 [ 90.422067] RSP: 002b:00007ffcd8c56568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 90.423031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17e617cd82 [ 90.423940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17e55b6000 [ 90.424829] RBP: 00007f17e55b6000 R08: 0000000000000009 R09: 0000000000001000 [ 90.425729] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559817bf5d90 [ 90.426645] R13: 00007ffcd8c56580 R14: 00007ffcd8c565b0 R15: 00007ffcd8c56910 [ 90.427550] [ 90.427884] [ 90.428114] Allocated by task 214: [ 90.428610] kasan_save_stack+0x22/0x50 [ 90.429184] kasan_set_track+0x25/0x30 [ 90.429744] __kasan_slab_alloc+0x59/0x70 [ 90.430341] kmem_cache_alloc+0x16b/0x370 [ 90.430924] vm_area_dup+0x20/0x160 [ 90.431438] __split_vma+0x170/0x950 [ 90.431976] split_vma+0xc6/0x110 [ 90.432470] mprotect_fixup+0x8d2/0xb30 [ 90.433037] do_mprotect_pkey+0x87e/0xd40 [ 90.433630] __x64_sys_mprotect+0x78/0xc0 [ 90.434219] do_syscall_64+0x3f/0x90 [ 90.434751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.435474] [ 90.435718] Freed by task 214: [ 90.436173] kasan_save_stack+0x22/0x50 [ 90.436747] kasan_set_track+0x25/0x30 [ 90.437298] kasan_save_free_info+0x2b/0x50 [ 90.437821] __kasan_slab_free+0x10a/0x190 [ 90.438345] kmem_cache_free+0x10d/0x4d0 [ 90.438868] rcu_core+0x8c8/0x2860 [ 90.439355] __do_softirq+0x1b7/0x7d4 [ 90.439833] [ 90.440045] Last potentially related work creation: [ 90.440621] kasan_save_stack+0x22/0x50 [ 90.441117] __kasan_record_aux_stack+0x8e/0xa0 [ 90.441682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.442321] remove_vma+0x139/0x170 [ 90.442767] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.443356] do_vmi_munmap+0x1f1/0x2b0 [ 90.443852] __vm_munmap+0x138/0x3a0 [ 90.444329] __x64_sys_munmap+0x59/0x80 [ 90.444821] do_syscall_64+0x3f/0x90 [ 90.445287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.445925] [ 90.446141] The buggy address belongs to the object at ffff88801654e740 [ 90.446141] which belongs to the cache vm_area_struct of size 168 [ 90.447607] The buggy address is located 88 bytes inside of [ 90.447607] freed 168-byte region [ffff88801654e740, ffff88801654e7e8) [ 90.449041] [ 90.449257] The buggy address belongs to the physical page: [ 90.449925] page:000000005117e9cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1654e [ 90.451025] memcg:ffff888016b70401 [ 90.451448] flags: 0x100000000000200(slab|node=0|zone=1) [ 90.452101] page_type: 0xffffffff() [ 90.452552] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 90.453462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b70401 [ 90.454376] page dumped because: kasan: bad access detected [ 90.455035] [ 90.455249] Memory state around the buggy address: [ 90.455847] ffff88801654e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 90.456697] ffff88801654e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 90.457577] >ffff88801654e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 90.458420] ^ [ 90.458914] ffff88801654e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 90.459780] ffff88801654e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 90.460641] ================================================================== [ 90.461698] Disabling lock debugging due to kernel taint [ 92.557593] BUG: Bad rss-counter state mm:000000000e5a36b7 type:MM_FILEPAGES val:33 [ 92.558644] BUG: Bad rss-counter state mm:000000000e5a36b7 type:MM_ANONPAGES val:22 [ 93.059320] BUG: Bad rss-counter state mm:00000000f1907117 type:MM_FILEPAGES val:33 [ 93.060418] BUG: Bad rss-counter state mm:00000000f1907117 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19653' (ECDSA) to the list of known hosts. 2023/06/19 14:50:29 fuzzer started 2023/06/19 14:50:29 dialing manager at localhost:44161 2023/06/19 14:50:29 checking machine... 2023/06/19 14:50:29 checking revisions... [ 93.758246] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:50:29 testing simple program... [ 93.807631] cgroup: Unknown subsys name 'net' [ 93.849129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:30 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=ffff888008c58000 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=00007ffc195524a8 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=00007ffba3354510000055c119e67790 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=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff888014707968 RDX=1ffff110028e0f24 RSI=ffffffff813ad6d0 RDI=ffff888014707990 RBP=ffff888014707960 RSP=ffff8880147078c0 R8 =0000000000000001 R9 =ffff888014707908 R10=0000000000038001 R11=0000000000003c0d R12=ffff888014707990 R13=0000000000000000 R14=ffff88800c733680 R15=0000000000092c40 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f27b9f5a900 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=00007f27ba511618 CR3=000000001a2fa000 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=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