syzkaller login: [ 61.315146] BUG: Bad rss-counter state mm:00000000714f02f7 type:MM_FILEPAGES val:33 [ 61.316767] BUG: Bad rss-counter state mm:00000000714f02f7 type:MM_ANONPAGES val:22 [ 61.485629] ================================================================== [ 61.486617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.487644] Read of size 8 at addr ffff88800c4db3f8 by task sshd/220 [ 61.488616] [ 61.488859] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.489790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.490875] Call Trace: [ 61.491217] [ 61.491546] dump_stack_lvl+0x91/0xf0 [ 61.492078] print_report+0xcc/0x620 [ 61.492602] ? __virt_addr_valid+0x102/0x340 [ 61.493201] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.493868] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.494554] kasan_report+0xbe/0xf0 [ 61.495073] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.495755] vma_interval_tree_remove+0xc75/0xec0 [ 61.496410] vma_prepare+0xc54/0x11a0 [ 61.496936] __split_vma+0x5af/0x950 [ 61.497454] ? __pfx___split_vma+0x10/0x10 [ 61.498029] ? find_held_lock+0x2c/0x110 [ 61.498616] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.499247] ? lock_is_held_type+0x9f/0x120 [ 61.499842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.500503] ? mtree_range_walk+0x632/0x900 [ 61.501104] ? mas_walk+0x5c7/0x7c0 [ 61.501628] do_vmi_munmap+0x1f1/0x2b0 [ 61.502174] mmap_region+0x1f9/0x2660 [ 61.502706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.503269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.504080] ? __pfx_lock_acquire+0x10/0x10 [ 61.504681] ? __pfx_mmap_region+0x10/0x10 [ 61.505281] ? security_mmap_addr+0x7d/0xa0 [ 61.505849] ? get_unmapped_area+0x1f5/0x3f0 [ 61.506400] do_mmap+0x854/0xf00 [ 61.506888] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.507446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.508093] ksys_mmap_pgoff+0x3af/0x500 [ 61.508667] do_syscall_64+0x3f/0x90 [ 61.509206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.509886] RIP: 0033:0x7f1a2aa98d82 [ 61.510347] 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 [ 61.512748] RSP: 002b:00007ffe25a35b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.513779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a2aa98d82 [ 61.514751] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a29ed2000 [ 61.515716] RBP: 00007f1a29ed2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.516563] R10: 0000000000000812 R11: 0000000000000206 R12: 000056381d035f70 [ 61.517525] R13: 00007ffe25a35b40 R14: 00007ffe25a35b70 R15: 00007ffe25a35ed0 [ 61.518499] [ 61.518835] [ 61.519082] Allocated by task 213: [ 61.519578] kasan_save_stack+0x22/0x50 [ 61.520085] kasan_set_track+0x25/0x30 [ 61.520592] __kasan_slab_alloc+0x59/0x70 [ 61.521195] kmem_cache_alloc+0x16b/0x370 [ 61.521789] vm_area_dup+0x20/0x160 [ 61.522315] __split_vma+0x170/0x950 [ 61.522812] split_vma+0xc6/0x110 [ 61.523248] mprotect_fixup+0x8d2/0xb30 [ 61.523804] do_mprotect_pkey+0x87e/0xd40 [ 61.524407] __x64_sys_mprotect+0x78/0xc0 [ 61.525011] do_syscall_64+0x3f/0x90 [ 61.525559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.526204] [ 61.526418] Freed by task 213: [ 61.526863] kasan_save_stack+0x22/0x50 [ 61.527452] kasan_set_track+0x25/0x30 [ 61.528041] kasan_save_free_info+0x2b/0x50 [ 61.528661] __kasan_slab_free+0x10a/0x190 [ 61.529330] kmem_cache_free+0x10d/0x4d0 [ 61.529936] rcu_core+0x8c8/0x2860 [ 61.530455] __do_softirq+0x1b7/0x7d4 [ 61.531010] [ 61.531260] Last potentially related work creation: [ 61.531967] kasan_save_stack+0x22/0x50 [ 61.532554] __kasan_record_aux_stack+0x8e/0xa0 [ 61.533223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.533929] remove_vma+0x139/0x170 [ 61.534383] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.535013] do_vmi_munmap+0x1f1/0x2b0 [ 61.535589] __vm_munmap+0x138/0x3a0 [ 61.536144] __x64_sys_munmap+0x59/0x80 [ 61.536729] do_syscall_64+0x3f/0x90 [ 61.537287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.538031] [ 61.538286] The buggy address belongs to the object at ffff88800c4db3a0 [ 61.538286] which belongs to the cache vm_area_struct of size 168 [ 61.539866] The buggy address is located 88 bytes inside of [ 61.539866] freed 168-byte region [ffff88800c4db3a0, ffff88800c4db448) [ 61.541510] [ 61.541741] The buggy address belongs to the physical page: [ 61.542396] page:0000000068dbb6d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4db [ 61.543469] memcg:ffff888013f73f01 [ 61.543907] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.544546] page_type: 0xffffffff() [ 61.544999] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.545915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f73f01 [ 61.546825] page dumped because: kasan: bad access detected [ 61.547485] [ 61.547708] Memory state around the buggy address: [ 61.548288] ffff88800c4db280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 61.549142] ffff88800c4db300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 61.550001] >ffff88800c4db380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.550848] ^ [ 61.551713] ffff88800c4db400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.552569] ffff88800c4db480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.553419] ================================================================== [ 61.554359] Disabling lock debugging due to kernel taint [ 63.572004] BUG: Bad rss-counter state mm:000000000edf3c84 type:MM_FILEPAGES val:33 [ 63.573563] BUG: Bad rss-counter state mm:000000000edf3c84 type:MM_ANONPAGES val:22 [ 64.016883] BUG: Bad rss-counter state mm:0000000035c4ab04 type:MM_FILEPAGES val:33 [ 64.018539] BUG: Bad rss-counter state mm:0000000035c4ab04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19638' (ECDSA) to the list of known hosts. 2023/06/19 13:19:18 fuzzer started 2023/06/19 13:19:18 dialing manager at localhost:44161 2023/06/19 13:19:18 checking machine... 2023/06/19 13:19:18 checking revisions... [ 64.715051] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:19:18 testing simple program... [ 64.758111] cgroup: Unknown subsys name 'net' [ 64.814367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:17 Registers: info registers vcpu 0 RAX=ffffffff863b27c9 RBX=0000000000000001 RCX=ffffffff863b27c4 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c764f9 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b27c8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ab54 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130aa4 RFL=00000216 [----AP-] 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 00007f96fcfb7900 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=00007f96fc44af40 CR3=000000000d95a000 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=94140688ea8a27a21846255dec6eebdf XMM02=000000000011cfb8eff9b2d0a8fce9cb XMM03=000000000011d0882c67c8bc2e329bc3 XMM04=d0656627c8f7dd8200000000000ae988 XMM05=c025204f9a16b7480000000000135620 XMM06=19e9129bd510f23500000000001344b8 XMM07=fb795ef6d657705600000000001249a8 XMM08=2c67c8bc2e329bc3000000000011d028 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000001a RBX=0000000000000000 RCX=ffffffff83c23229 RDX=ffffed10033b4d69 RSI=0000000000000004 RDI=ffff888019da6b40 RBP=ffff88800ab09800 RSP=ffff88800f5e79c0 R8 =0000000000000001 R9 =ffffed10033b4d68 R10=ffff888019da6b43 R11=63206e6f69737365 R12=ffff88800ab09d10 R13=ffff888019da6b40 R14=ffff88800f5e7a88 R15=ffff88800fc4b780 RIP=ffffffff83c23234 RFL=00000206 [-----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 00007fe0567c4700 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=00007f6716de1618 CR3=000000000d9c6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038313a3931 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000