syzkaller login: [ 31.281312] BUG: Bad rss-counter state mm:000000002d942a50 type:MM_FILEPAGES val:33 [ 31.282503] BUG: Bad rss-counter state mm:000000002d942a50 type:MM_ANONPAGES val:22 [ 31.462090] ================================================================== [ 31.463074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.464023] Read of size 8 at addr ffff88801bc09d08 by task sshd/220 [ 31.464888] [ 31.465114] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.466023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.467088] Call Trace: [ 31.467424] [ 31.467734] dump_stack_lvl+0x91/0xf0 [ 31.468235] print_report+0xcc/0x620 [ 31.468733] ? __virt_addr_valid+0x102/0x340 [ 31.469292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.469954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470586] kasan_report+0xbe/0xf0 [ 31.471090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471732] vma_interval_tree_remove+0xc75/0xec0 [ 31.472331] vma_prepare+0xc54/0x11a0 [ 31.472826] __split_vma+0x5af/0x950 [ 31.473297] ? __pfx___split_vma+0x10/0x10 [ 31.473862] ? find_held_lock+0x2c/0x110 [ 31.474384] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.474985] ? lock_is_held_type+0x9f/0x120 [ 31.475527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.476149] ? mtree_range_walk+0x632/0x900 [ 31.476717] ? mas_walk+0x5c7/0x7c0 [ 31.477196] do_vmi_munmap+0x1f1/0x2b0 [ 31.477718] mmap_region+0x1f9/0x2660 [ 31.478211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.478759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.479474] ? __pfx_lock_acquire+0x10/0x10 [ 31.480034] ? __pfx_mmap_region+0x10/0x10 [ 31.480578] ? security_mmap_addr+0x7d/0xa0 [ 31.481124] ? get_unmapped_area+0x1f5/0x3f0 [ 31.481682] do_mmap+0x854/0xf00 [ 31.482149] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.482652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.483239] ksys_mmap_pgoff+0x3af/0x500 [ 31.483763] do_syscall_64+0x3f/0x90 [ 31.484242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.484903] RIP: 0033:0x7fa18896ad82 [ 31.485360] 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 [ 31.487528] RSP: 002b:00007ffc8261e728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.488452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa18896ad82 [ 31.489469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa187da4000 [ 31.490611] RBP: 00007fa187da4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.491703] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566dd3f3f60 [ 31.492802] R13: 00007ffc8261e740 R14: 00007ffc8261e770 R15: 00007ffc8261ead0 [ 31.493771] [ 31.494102] [ 31.494321] Allocated by task 213: [ 31.494770] kasan_save_stack+0x22/0x50 [ 31.495309] kasan_set_track+0x25/0x30 [ 31.495824] __kasan_slab_alloc+0x59/0x70 [ 31.496358] kmem_cache_alloc+0x16b/0x370 [ 31.496886] vm_area_dup+0x20/0x160 [ 31.497339] __split_vma+0x170/0x950 [ 31.497854] split_vma+0xc6/0x110 [ 31.498301] mprotect_fixup+0x8d2/0xb30 [ 31.498820] do_mprotect_pkey+0x87e/0xd40 [ 31.499343] __x64_sys_mprotect+0x78/0xc0 [ 31.499872] do_syscall_64+0x3f/0x90 [ 31.500353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501014] [ 31.501231] Freed by task 203: [ 31.501631] kasan_save_stack+0x22/0x50 [ 31.502174] kasan_set_track+0x25/0x30 [ 31.502689] kasan_save_free_info+0x2b/0x50 [ 31.503219] __kasan_slab_free+0x10a/0x190 [ 31.503768] kmem_cache_free+0x10d/0x4d0 [ 31.504284] rcu_core+0x8c8/0x2860 [ 31.504747] __do_softirq+0x1b7/0x7d4 [ 31.505224] [ 31.505443] Last potentially related work creation: [ 31.506061] kasan_save_stack+0x22/0x50 [ 31.506565] __kasan_record_aux_stack+0x8e/0xa0 [ 31.507164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.507822] remove_vma+0x139/0x170 [ 31.508284] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.508855] do_vmi_munmap+0x1f1/0x2b0 [ 31.509342] __vm_munmap+0x138/0x3a0 [ 31.509840] __x64_sys_munmap+0x59/0x80 [ 31.510346] do_syscall_64+0x3f/0x90 [ 31.510835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.511480] [ 31.511723] The buggy address belongs to the object at ffff88801bc09cb0 [ 31.511723] which belongs to the cache vm_area_struct of size 168 [ 31.513257] The buggy address is located 88 bytes inside of [ 31.513257] freed 168-byte region [ffff88801bc09cb0, ffff88801bc09d58) [ 31.514784] [ 31.515001] The buggy address belongs to the physical page: [ 31.515666] page:000000003eaa22f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc09 [ 31.516759] memcg:ffff888018c91701 [ 31.517181] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.517853] page_type: 0xffffffff() [ 31.518304] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.519223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c91701 [ 31.520130] page dumped because: kasan: bad access detected [ 31.520790] [ 31.521005] Memory state around the buggy address: [ 31.521587] ffff88801bc09c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.522455] ffff88801bc09c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.523321] >ffff88801bc09d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.524172] ^ [ 31.524613] ffff88801bc09d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.525476] ffff88801bc09e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.526345] ================================================================== [ 31.527334] Disabling lock debugging due to kernel taint [ 34.037729] BUG: Bad rss-counter state mm:0000000006085314 type:MM_FILEPAGES val:33 [ 34.038733] BUG: Bad rss-counter state mm:0000000006085314 type:MM_ANONPAGES val:22 [ 34.604527] BUG: Bad rss-counter state mm:000000005c25bcb0 type:MM_FILEPAGES val:33 [ 34.605724] BUG: Bad rss-counter state mm:000000005c25bcb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12576' (ECDSA) to the list of known hosts. 2023/06/19 14:22:27 fuzzer started 2023/06/19 14:22:27 dialing manager at localhost:44161 2023/06/19 14:22:27 checking machine... 2023/06/19 14:22:27 checking revisions... [ 35.231285] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:22:27 testing simple program... [ 35.280931] cgroup: Unknown subsys name 'net' [ 35.330754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81130bb0 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 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=00007effd851b3e0 CR3=000000000ffee000 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=2036323a32323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81745a69 RCX=0000000000000001 RDX=1ffff11002031db6 RSI=ffff88801018fef8 RDI=ffffffff81745a69 RBP=ffffffff81745a69 RSP=ffff88801018ed00 R8 =0000000000000001 R9 =ffff88801018ed98 R10=0000000000038001 R11=000000000001e468 R12=ffff88801018ee20 R13=0000000000000000 R14=ffff88801964b680 R15=ffff88801018f278 RIP=ffffffff811fc6f7 RFL=00000296 [--S-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 00007fae5d916900 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=00007fae5d8f5020 CR3=000000000eaea000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000