syzkaller login: [ 31.268302] BUG: Bad rss-counter state mm:00000000bbed52a6 type:MM_FILEPAGES val:33 [ 31.268969] BUG: Bad rss-counter state mm:00000000bbed52a6 type:MM_ANONPAGES val:22 [ 31.455887] ================================================================== [ 31.456516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.457142] Read of size 8 at addr ffff88800e1d9df0 by task sshd/223 [ 31.457635] [ 31.457813] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.458361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.459009] Call Trace: [ 31.459216] [ 31.459396] dump_stack_lvl+0x91/0xf0 [ 31.459750] print_report+0xcc/0x620 [ 31.460077] ? __virt_addr_valid+0x102/0x340 [ 31.461553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.461994] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.462439] kasan_report+0xbe/0xf0 [ 31.462776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463223] vma_interval_tree_remove+0xc75/0xec0 [ 31.463611] vma_prepare+0xc54/0x11a0 [ 31.463964] __split_vma+0x5af/0x950 [ 31.464345] ? __pfx___split_vma+0x10/0x10 [ 31.464710] ? find_held_lock+0x2c/0x110 [ 31.465047] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.465463] ? lock_is_held_type+0x9f/0x120 [ 31.465860] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.466303] ? mtree_range_walk+0x632/0x900 [ 31.466695] ? mas_walk+0x5c7/0x7c0 [ 31.467005] do_vmi_munmap+0x1f1/0x2b0 [ 31.467374] mmap_region+0x1f9/0x2660 [ 31.467705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.468065] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.468606] ? __pfx_lock_acquire+0x10/0x10 [ 31.468968] ? __pfx_mmap_region+0x10/0x10 [ 31.469363] ? security_mmap_addr+0x7d/0xa0 [ 31.469730] ? get_unmapped_area+0x1f5/0x3f0 [ 31.470106] do_mmap+0x854/0xf00 [ 31.470444] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.470795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.471206] ksys_mmap_pgoff+0x3af/0x500 [ 31.471535] do_syscall_64+0x3f/0x90 [ 31.471887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472383] RIP: 0033:0x7f317848ad82 [ 31.472713] 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 [ 31.474187] RSP: 002b:00007ffe787d7a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.474798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f317848ad82 [ 31.475388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31778c4000 [ 31.475968] RBP: 00007f31778c4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.476595] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2bce28ec0 [ 31.477206] R13: 00007ffe787d7a90 R14: 00007ffe787d7ac0 R15: 00007ffe787d7e20 [ 31.477784] [ 31.477991] [ 31.478183] Allocated by task 214: [ 31.478467] kasan_save_stack+0x22/0x50 [ 31.478825] kasan_set_track+0x25/0x30 [ 31.479194] __kasan_slab_alloc+0x59/0x70 [ 31.479534] kmem_cache_alloc+0x16b/0x370 [ 31.479913] vm_area_dup+0x20/0x160 [ 31.480281] __split_vma+0x170/0x950 [ 31.480588] split_vma+0xc6/0x110 [ 31.480895] mprotect_fixup+0x8d2/0xb30 [ 31.481267] do_mprotect_pkey+0x87e/0xd40 [ 31.481602] __x64_sys_mprotect+0x78/0xc0 [ 31.481983] do_syscall_64+0x3f/0x90 [ 31.482339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.482761] [ 31.482903] Freed by task 19: [ 31.483201] kasan_save_stack+0x22/0x50 [ 31.483527] kasan_set_track+0x25/0x30 [ 31.483855] kasan_save_free_info+0x2b/0x50 [ 31.484271] __kasan_slab_free+0x10a/0x190 [ 31.484618] kmem_cache_free+0x10d/0x4d0 [ 31.484946] rcu_core+0x8c8/0x2860 [ 31.485281] __do_softirq+0x1b7/0x7d4 [ 31.485586] [ 31.485732] Last potentially related work creation: [ 31.486099] kasan_save_stack+0x22/0x50 [ 31.486482] __kasan_record_aux_stack+0x8e/0xa0 [ 31.486853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.487313] remove_vma+0x139/0x170 [ 31.487605] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.487973] do_vmi_munmap+0x1f1/0x2b0 [ 31.488366] __vm_munmap+0x138/0x3a0 [ 31.488666] __x64_sys_munmap+0x59/0x80 [ 31.488985] do_syscall_64+0x3f/0x90 [ 31.489343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489760] [ 31.489900] The buggy address belongs to the object at ffff88800e1d9d98 [ 31.489900] which belongs to the cache vm_area_struct of size 168 [ 31.490878] The buggy address is located 88 bytes inside of [ 31.490878] freed 168-byte region [ffff88800e1d9d98, ffff88800e1d9e40) [ 31.491819] [ 31.491961] The buggy address belongs to the physical page: [ 31.492481] page:000000009de92bfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1d9 [ 31.493310] memcg:ffff88800e448301 [ 31.493601] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.494113] page_type: 0xffffffff() [ 31.494497] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.495224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e448301 [ 31.495905] page dumped because: kasan: bad access detected [ 31.496425] [ 31.496566] Memory state around the buggy address: [ 31.496961] ffff88800e1d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.497549] ffff88800e1d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.498102] >ffff88800e1d9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.498695] ^ [ 31.499253] ffff88800e1d9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.499789] ffff88800e1d9e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.500405] ================================================================== [ 31.512263] Disabling lock debugging due to kernel taint [ 35.932766] BUG: Bad rss-counter state mm:00000000f05fc5cf type:MM_FILEPAGES val:33 [ 35.933768] BUG: Bad rss-counter state mm:00000000f05fc5cf type:MM_ANONPAGES val:22 [ 36.584664] BUG: Bad rss-counter state mm:00000000d9326573 type:MM_FILEPAGES val:33 [ 36.586069] BUG: Bad rss-counter state mm:00000000d9326573 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31939' (ECDSA) to the list of known hosts. 2023/06/21 10:11:11 fuzzer started 2023/06/21 10:11:12 dialing manager at localhost:36067 2023/06/21 10:11:12 checking machine... 2023/06/21 10:11:12 checking revisions... [ 37.535360] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:11:12 testing simple program... [ 37.601792] cgroup: Unknown subsys name 'net' [ 37.656597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:11 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001f06f0f RSI=ffffffff8450cc7f RDI=ffff88800f8378e8 RBP=ffff88800f8378b8 RSP=ffff88800f837818 R8 =0000000000000001 R9 =ffff88800f837860 R10=0000000000038001 R11=000000000000774d R12=ffff88800f8378e8 R13=0000000000000000 R14=ffff88801a2a3680 R15=ffff88800e69a680 RIP=ffffffff813ad474 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 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=00007ffb554a2328 CR3=0000000016170000 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=2031313a31313a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000010001 RBX=0000000000010000 RCX=ffffffff813bcfd0 RDX=ffff88800f33b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09dd0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=ffff88806cf09ff8 R12=fffffffffffffe23 R13=ffff88806cf2c240 R14=ffff88800fdbf478 R15=dffffc0000000000 RIP=ffffffff814c0860 RFL=00000006 [-----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 00007fa26cafd900 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=00007fe9af533570 CR3=000000000dd8a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000