syzkaller login: [ 61.296797] BUG: Bad rss-counter state mm:00000000422e8f90 type:MM_FILEPAGES val:33 [ 61.298570] BUG: Bad rss-counter state mm:00000000422e8f90 type:MM_ANONPAGES val:22 [ 61.470284] ================================================================== [ 61.471285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.472285] Read of size 8 at addr ffff88800e0aa798 by task sshd/220 [ 61.473253] [ 61.473484] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.474403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.475514] Call Trace: [ 61.475855] [ 61.476154] dump_stack_lvl+0x91/0xf0 [ 61.476678] print_report+0xcc/0x620 [ 61.477199] ? __virt_addr_valid+0x102/0x340 [ 61.477824] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.478483] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.479149] kasan_report+0xbe/0xf0 [ 61.479657] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.480329] vma_interval_tree_remove+0xc75/0xec0 [ 61.480984] vma_prepare+0xc54/0x11a0 [ 61.481500] __split_vma+0x5af/0x950 [ 61.482015] ? __pfx___split_vma+0x10/0x10 [ 61.482593] ? find_held_lock+0x2c/0x110 [ 61.483143] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.483768] ? lock_is_held_type+0x9f/0x120 [ 61.484336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.484983] ? mtree_range_walk+0x632/0x900 [ 61.485576] ? mas_walk+0x5c7/0x7c0 [ 61.486078] do_vmi_munmap+0x1f1/0x2b0 [ 61.486606] mmap_region+0x1f9/0x2660 [ 61.487115] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.487669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.488437] ? __pfx_lock_acquire+0x10/0x10 [ 61.489024] ? __pfx_mmap_region+0x10/0x10 [ 61.489594] ? security_mmap_addr+0x7d/0xa0 [ 61.490166] ? get_unmapped_area+0x1f5/0x3f0 [ 61.490759] do_mmap+0x854/0xf00 [ 61.491235] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.491759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.492343] ksys_mmap_pgoff+0x3af/0x500 [ 61.492905] do_syscall_64+0x3f/0x90 [ 61.493410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.494094] RIP: 0033:0x7fa3837f1d82 [ 61.494595] 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 [ 61.496908] RSP: 002b:00007ffc2933b798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.497856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3837f1d82 [ 61.498763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa382c2b000 [ 61.499703] RBP: 00007fa382c2b000 R08: 0000000000000009 R09: 0000000000001000 [ 61.500624] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a611b04ec0 [ 61.501552] R13: 00007ffc2933b7b0 R14: 00007ffc2933b7e0 R15: 00007ffc2933bb40 [ 61.502471] [ 61.502783] [ 61.503005] Allocated by task 213: [ 61.503455] kasan_save_stack+0x22/0x50 [ 61.503974] kasan_set_track+0x25/0x30 [ 61.504501] __kasan_slab_alloc+0x59/0x70 [ 61.505075] kmem_cache_alloc+0x16b/0x370 [ 61.505610] vm_area_dup+0x20/0x160 [ 61.506077] __split_vma+0x170/0x950 [ 61.506559] split_vma+0xc6/0x110 [ 61.507014] mprotect_fixup+0x8d2/0xb30 [ 61.507576] do_mprotect_pkey+0x87e/0xd40 [ 61.508135] __x64_sys_mprotect+0x78/0xc0 [ 61.508695] do_syscall_64+0x3f/0x90 [ 61.509205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.509886] [ 61.510113] Freed by task 213: [ 61.510523] kasan_save_stack+0x22/0x50 [ 61.511062] kasan_set_track+0x25/0x30 [ 61.511598] kasan_save_free_info+0x2b/0x50 [ 61.512150] __kasan_slab_free+0x10a/0x190 [ 61.512701] kmem_cache_free+0x10d/0x4d0 [ 61.513227] rcu_core+0x8c8/0x2860 [ 61.513679] __do_softirq+0x1b7/0x7d4 [ 61.514224] [ 61.514445] Last potentially related work creation: [ 61.515041] kasan_save_stack+0x22/0x50 [ 61.515580] __kasan_record_aux_stack+0x8e/0xa0 [ 61.516186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.516869] remove_vma+0x139/0x170 [ 61.517358] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.517957] do_vmi_munmap+0x1f1/0x2b0 [ 61.518477] __vm_munmap+0x138/0x3a0 [ 61.518978] __x64_sys_munmap+0x59/0x80 [ 61.519522] do_syscall_64+0x3f/0x90 [ 61.520022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.520702] [ 61.520924] The buggy address belongs to the object at ffff88800e0aa740 [ 61.520924] which belongs to the cache vm_area_struct of size 168 [ 61.522469] The buggy address is located 88 bytes inside of [ 61.522469] freed 168-byte region [ffff88800e0aa740, ffff88800e0aa7e8) [ 61.523931] [ 61.524156] The buggy address belongs to the physical page: [ 61.524858] page:0000000022f03e7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0aa [ 61.526016] memcg:ffff888013f33c01 [ 61.526464] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.527140] page_type: 0xffffffff() [ 61.527613] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.528593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f33c01 [ 61.529565] page dumped because: kasan: bad access detected [ 61.530262] [ 61.530488] Memory state around the buggy address: [ 61.531081] ffff88800e0aa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.531994] ffff88800e0aa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.532862] >ffff88800e0aa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.533729] ^ [ 61.534231] ffff88800e0aa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.535096] ffff88800e0aa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.535961] ================================================================== [ 61.536941] Disabling lock debugging due to kernel taint [ 63.993868] BUG: Bad rss-counter state mm:00000000864751a1 type:MM_FILEPAGES val:33 [ 63.995204] BUG: Bad rss-counter state mm:00000000864751a1 type:MM_ANONPAGES val:22 [ 64.493498] BUG: Bad rss-counter state mm:00000000bb84db1a type:MM_FILEPAGES val:33 [ 64.494877] BUG: Bad rss-counter state mm:00000000bb84db1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47834' (ECDSA) to the list of known hosts. 2023/06/21 10:30:30 fuzzer started 2023/06/21 10:30:30 dialing manager at localhost:36067 2023/06/21 10:30:30 checking machine... 2023/06/21 10:30:30 checking revisions... [ 65.238686] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:30:30 testing simple program... [ 65.291199] cgroup: Unknown subsys name 'net' [ 65.357218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:30:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff8880102eb680 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff888009d7a658 RSP=ffff8880146c7e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007f0817eef920 R14=ffff888009d7a668 R15=0000000000000000 RIP=ffffffff814c03a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0818ac5900 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=00007f0817eef920 CR3=000000000d68a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ff746cc099ed127700000000000ae988 XMM05=d05e39b9cd188e3a0000000000132a88 XMM06=4fda316b135da52b0000000000131878 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb1bfbcc0b0 CR3=000000000eec8000 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=2039323a30333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000