syzkaller login: [ 105.424290] BUG: Bad rss-counter state mm:000000006cb05b6b type:MM_FILEPAGES val:33 [ 105.425310] BUG: Bad rss-counter state mm:000000006cb05b6b type:MM_ANONPAGES val:22 [ 105.461737] ================================================================== [ 105.462761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.463833] Read of size 8 at addr ffff88800d7deed8 by task sshd/220 [ 105.464752] [ 105.465007] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.466110] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.467459] Call Trace: [ 105.467883] [ 105.468283] dump_stack_lvl+0x91/0xf0 [ 105.468979] print_report+0xcc/0x620 [ 105.469648] ? __virt_addr_valid+0x102/0x340 [ 105.470387] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.471218] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.472043] kasan_report+0xbe/0xf0 [ 105.472640] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.473399] vma_interval_tree_remove+0xc75/0xec0 [ 105.474168] vma_prepare+0xc54/0x11a0 [ 105.474770] __split_vma+0x5af/0x950 [ 105.475343] ? __pfx___split_vma+0x10/0x10 [ 105.475985] ? find_held_lock+0x2c/0x110 [ 105.476630] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.477315] ? lock_is_held_type+0x9f/0x120 [ 105.477970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.478715] ? mtree_range_walk+0x632/0x900 [ 105.479383] ? mas_walk+0x5c7/0x7c0 [ 105.479955] do_vmi_munmap+0x1f1/0x2b0 [ 105.480574] mmap_region+0x1f9/0x2660 [ 105.481112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.481613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.482320] ? __pfx_lock_acquire+0x10/0x10 [ 105.482844] ? __pfx_mmap_region+0x10/0x10 [ 105.483376] ? security_mmap_addr+0x7d/0xa0 [ 105.483899] ? get_unmapped_area+0x1f5/0x3f0 [ 105.484450] do_mmap+0x854/0xf00 [ 105.484882] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.485370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.485926] ksys_mmap_pgoff+0x3af/0x500 [ 105.486429] do_syscall_64+0x3f/0x90 [ 105.486897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.487539] RIP: 0033:0x7f39a4a80d82 [ 105.487992] 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 [ 105.490100] RSP: 002b:00007ffc61cdc978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.490993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39a4a80d82 [ 105.491836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39a3eba000 [ 105.492684] RBP: 00007f39a3eba000 R08: 0000000000000009 R09: 0000000000001000 [ 105.493514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f114f87b20 [ 105.494340] R13: 00007ffc61cdc990 R14: 00007ffc61cdc9c0 R15: 00007ffc61cdcd20 [ 105.495185] [ 105.495477] [ 105.495691] Allocated by task 213: [ 105.496112] kasan_save_stack+0x22/0x50 [ 105.496628] kasan_set_track+0x25/0x30 [ 105.497120] __kasan_slab_alloc+0x59/0x70 [ 105.497640] kmem_cache_alloc+0x16b/0x370 [ 105.498147] vm_area_dup+0x20/0x160 [ 105.498598] __split_vma+0x170/0x950 [ 105.499063] split_vma+0xc6/0x110 [ 105.499502] mprotect_fixup+0x8d2/0xb30 [ 105.500001] do_mprotect_pkey+0x87e/0xd40 [ 105.500530] __x64_sys_mprotect+0x78/0xc0 [ 105.501059] do_syscall_64+0x3f/0x90 [ 105.501531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.502165] [ 105.502379] Freed by task 213: [ 105.502769] kasan_save_stack+0x22/0x50 [ 105.503279] kasan_set_track+0x25/0x30 [ 105.503766] kasan_save_free_info+0x2b/0x50 [ 105.504295] __kasan_slab_free+0x10a/0x190 [ 105.504836] kmem_cache_free+0x10d/0x4d0 [ 105.505384] rcu_core+0x8c8/0x2860 [ 105.505833] __do_softirq+0x1b7/0x7d4 [ 105.506304] [ 105.506517] Last potentially related work creation: [ 105.507098] kasan_save_stack+0x22/0x50 [ 105.507595] __kasan_record_aux_stack+0x8e/0xa0 [ 105.508166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.508951] remove_vma+0x139/0x170 [ 105.509512] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.510186] do_vmi_munmap+0x1f1/0x2b0 [ 105.510773] __vm_munmap+0x138/0x3a0 [ 105.511342] __x64_sys_munmap+0x59/0x80 [ 105.511945] do_syscall_64+0x3f/0x90 [ 105.512550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.513249] [ 105.513463] The buggy address belongs to the object at ffff88800d7dee80 [ 105.513463] which belongs to the cache vm_area_struct of size 168 [ 105.514922] The buggy address is located 88 bytes inside of [ 105.514922] freed 168-byte region [ffff88800d7dee80, ffff88800d7def28) [ 105.516309] [ 105.516549] The buggy address belongs to the physical page: [ 105.517206] page:0000000083f716c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7de [ 105.518271] memcg:ffff888015843001 [ 105.518691] flags: 0x100000000000200(slab|node=0|zone=1) [ 105.519324] page_type: 0xffffffff() [ 105.519768] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 105.520684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015843001 [ 105.521586] page dumped because: kasan: bad access detected [ 105.522247] [ 105.522460] Memory state around the buggy address: [ 105.523031] ffff88800d7ded80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 105.523878] ffff88800d7dee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 105.524751] >ffff88800d7dee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 105.525589] ^ [ 105.526303] ffff88800d7def00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 105.527145] ffff88800d7def80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 105.527978] ================================================================== [ 105.528887] Disabling lock debugging due to kernel taint [ 107.474511] BUG: Bad rss-counter state mm:000000009cc1a918 type:MM_FILEPAGES val:33 [ 107.475320] BUG: Bad rss-counter state mm:000000009cc1a918 type:MM_ANONPAGES val:22 [ 107.878936] BUG: Bad rss-counter state mm:00000000bcbcbf79 type:MM_FILEPAGES val:33 [ 107.879730] BUG: Bad rss-counter state mm:00000000bcbcbf79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34945' (ECDSA) to the list of known hosts. 2023/06/19 13:38:07 fuzzer started 2023/06/19 13:38:08 dialing manager at localhost:44161 2023/06/19 13:38:08 checking machine... 2023/06/19 13:38:08 checking revisions... [ 108.565790] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:38:08 testing simple program... [ 108.626713] cgroup: Unknown subsys name 'net' [ 108.683431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:37:23 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=ffff88800e204280 RCX=0000000000000000 RDX=ffff88800f9c8000 RSI=ffffffff81862a7f RDI=0000000000000000 RBP=ffff88800e204280 RSP=ffff8880163a7ea8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=4920230a2e445342 R12=1ffff11002c74fd5 R13=00005598aa8384b0 R14=ffff88800e204370 R15=0000000000001000 RIP=ffffffff81865054 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 00007fa47a073900 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=00007ffcac778000 CR3=000000000e370000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 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=ffff888008c58400 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=00007f27c929f670 CR3=000000000ca4a000 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=74b8c245cc7ed6887f44b539fcb5c68d XMM02=ec2efd57dc4c00df0000000000126898 XMM03=9ff24695b58441f50000000000126968 XMM04=41346ffffe66b25600000000000ae988 XMM05=19e9129bd510f235000000000013cc18 XMM06=0050bd3491d561f2000000000013ba80 XMM07=e042d86d42eb936e000000000012d458 XMM08=9ff24695b58441f50000000000126968 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000