syzkaller login: [ 45.447716] BUG: Bad rss-counter state mm:00000000cefcc3ed type:MM_FILEPAGES val:33 [ 45.448892] BUG: Bad rss-counter state mm:00000000cefcc3ed type:MM_ANONPAGES val:22 [ 45.487776] ================================================================== [ 45.488801] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.489840] Read of size 8 at addr ffff8880182a74e0 by task sshd/227 [ 45.490874] [ 45.491120] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.492077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.493160] Call Trace: [ 45.493515] [ 45.493827] dump_stack_lvl+0x91/0xf0 [ 45.494368] print_report+0xcc/0x620 [ 45.494925] ? __virt_addr_valid+0x102/0x340 [ 45.495536] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.496223] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.496903] kasan_report+0xbe/0xf0 [ 45.497432] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.498137] vma_interval_tree_remove+0xc75/0xec0 [ 45.498825] vma_prepare+0xc54/0x11a0 [ 45.499380] __split_vma+0x5af/0x950 [ 45.499923] ? __pfx___split_vma+0x10/0x10 [ 45.500525] ? find_held_lock+0x2c/0x110 [ 45.501121] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.501766] ? lock_is_held_type+0x9f/0x120 [ 45.502379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.503094] ? mtree_range_walk+0x632/0x900 [ 45.503723] ? mas_walk+0x5c7/0x7c0 [ 45.504261] do_vmi_munmap+0x1f1/0x2b0 [ 45.504814] mmap_region+0x1f9/0x2660 [ 45.505368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.505941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.506752] ? __pfx_lock_acquire+0x10/0x10 [ 45.507356] ? __pfx_mmap_region+0x10/0x10 [ 45.507952] ? security_mmap_addr+0x7d/0xa0 [ 45.508545] ? get_unmapped_area+0x1f5/0x3f0 [ 45.509161] do_mmap+0x854/0xf00 [ 45.509651] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.510210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.510860] ksys_mmap_pgoff+0x3af/0x500 [ 45.511438] do_syscall_64+0x3f/0x90 [ 45.511983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.512716] RIP: 0033:0x7f5207b14d82 [ 45.513235] 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 [ 45.515682] RSP: 002b:00007ffd827594c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.516708] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5207b14d82 [ 45.517678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5206f4e000 [ 45.518651] RBP: 00007f5206f4e000 R08: 0000000000000009 R09: 0000000000001000 [ 45.519497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b4f31aec0 [ 45.520352] R13: 00007ffd827594e0 R14: 00007ffd82759510 R15: 00007ffd82759870 [ 45.521207] [ 45.521500] [ 45.521715] Allocated by task 220: [ 45.522146] kasan_save_stack+0x22/0x50 [ 45.522666] kasan_set_track+0x25/0x30 [ 45.523159] __kasan_slab_alloc+0x59/0x70 [ 45.523684] kmem_cache_alloc+0x16b/0x370 [ 45.524208] vm_area_dup+0x20/0x160 [ 45.524660] __split_vma+0x170/0x950 [ 45.525121] split_vma+0xc6/0x110 [ 45.525558] mprotect_fixup+0x8d2/0xb30 [ 45.526058] do_mprotect_pkey+0x87e/0xd40 [ 45.526589] __x64_sys_mprotect+0x78/0xc0 [ 45.527103] do_syscall_64+0x3f/0x90 [ 45.527574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.528217] [ 45.528440] Freed by task 220: [ 45.528831] kasan_save_stack+0x22/0x50 [ 45.529333] kasan_set_track+0x25/0x30 [ 45.529834] kasan_save_free_info+0x2b/0x50 [ 45.530365] __kasan_slab_free+0x10a/0x190 [ 45.530920] kmem_cache_free+0x10d/0x4d0 [ 45.531426] rcu_core+0x8c8/0x2860 [ 45.531868] __do_softirq+0x1b7/0x7d4 [ 45.532345] [ 45.532560] Last potentially related work creation: [ 45.533150] kasan_save_stack+0x22/0x50 [ 45.533653] __kasan_record_aux_stack+0x8e/0xa0 [ 45.534223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.534874] remove_vma+0x139/0x170 [ 45.535329] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.535883] do_vmi_munmap+0x1f1/0x2b0 [ 45.536367] __vm_munmap+0x138/0x3a0 [ 45.536834] __x64_sys_munmap+0x59/0x80 [ 45.537337] do_syscall_64+0x3f/0x90 [ 45.537806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.538458] [ 45.538673] The buggy address belongs to the object at ffff8880182a7488 [ 45.538673] which belongs to the cache vm_area_struct of size 168 [ 45.540134] The buggy address is located 88 bytes inside of [ 45.540134] freed 168-byte region [ffff8880182a7488, ffff8880182a7530) [ 45.541519] [ 45.541735] The buggy address belongs to the physical page: [ 45.542392] page:0000000088d5107c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182a7 [ 45.543497] memcg:ffff88800e4e5901 [ 45.543922] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.544560] page_type: 0xffffffff() [ 45.545011] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.545920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e5901 [ 45.546830] page dumped because: kasan: bad access detected [ 45.547490] [ 45.547706] Memory state around the buggy address: [ 45.548279] ffff8880182a7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.549198] ffff8880182a7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 45.550163] >ffff8880182a7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.551138] ^ [ 45.551990] ffff8880182a7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.552957] ffff8880182a7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.553916] ================================================================== [ 45.555223] Disabling lock debugging due to kernel taint [ 47.646001] BUG: Bad rss-counter state mm:00000000a651b5d8 type:MM_FILEPAGES val:33 [ 47.647080] BUG: Bad rss-counter state mm:00000000a651b5d8 type:MM_ANONPAGES val:22 [ 48.066249] BUG: Bad rss-counter state mm:00000000b89718bb type:MM_FILEPAGES val:33 [ 48.067265] BUG: Bad rss-counter state mm:00000000b89718bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36805' (ECDSA) to the list of known hosts. 2023/06/19 14:30:56 fuzzer started 2023/06/19 14:30:56 dialing manager at localhost:44161 2023/06/19 14:30:56 checking machine... 2023/06/19 14:30:56 checking revisions... [ 48.773061] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:30:56 testing simple program... [ 48.824165] cgroup: Unknown subsys name 'net' [ 48.863620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:49 Registers: info registers vcpu 0 RAX=0000000080010050 RBX=ffff88800c460000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800c460000 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=ffff88806ce09ff8 R12=00000000000101f7 R13=ffff88800c460180 R14=ffff88800c4644c8 R15=ffff88800c460008 RIP=ffffffff821920cf 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 00007f92443de900 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=0000562052960768 CR3=000000000ef8e000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800c460000 RSP=ffff88800f4277d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed100188c001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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=00007ffd12be9f68 CR3=0000000005482000 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=00007f1ebcdfb510000055f0c948d790 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