syzkaller login: [ 64.480143] BUG: Bad rss-counter state mm:00000000b90a5bc5 type:MM_FILEPAGES val:33 [ 64.481548] BUG: Bad rss-counter state mm:00000000b90a5bc5 type:MM_ANONPAGES val:22 [ 64.565930] ================================================================== [ 64.566864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.567845] Read of size 8 at addr ffff88800fff2c20 by task sshd/225 [ 64.568627] [ 64.568849] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.569824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.570815] Call Trace: [ 64.571145] <TASK> [ 64.571434] dump_stack_lvl+0x91/0xf0 [ 64.571930] print_report+0xcc/0x620 [ 64.572420] ? __virt_addr_valid+0x102/0x340 [ 64.572978] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.573598] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.574247] kasan_report+0xbe/0xf0 [ 64.574725] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.575367] vma_interval_tree_remove+0xc75/0xec0 [ 64.575981] vma_prepare+0xc54/0x11a0 [ 64.576458] __split_vma+0x5af/0x950 [ 64.576926] ? __pfx___split_vma+0x10/0x10 [ 64.577453] ? find_held_lock+0x2c/0x110 [ 64.577999] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.578573] ? lock_is_held_type+0x9f/0x120 [ 64.579111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.579713] ? mtree_range_walk+0x632/0x900 [ 64.580278] ? mas_walk+0x5c7/0x7c0 [ 64.580761] do_vmi_munmap+0x1f1/0x2b0 [ 64.581257] mmap_region+0x1f9/0x2660 [ 64.581741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.582264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.582975] ? __pfx_lock_acquire+0x10/0x10 [ 64.583508] ? __pfx_mmap_region+0x10/0x10 [ 64.584046] ? security_mmap_addr+0x7d/0xa0 [ 64.584582] ? get_unmapped_area+0x1f5/0x3f0 [ 64.585199] do_mmap+0x854/0xf00 [ 64.585711] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.586312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.586969] ksys_mmap_pgoff+0x3af/0x500 [ 64.587565] do_syscall_64+0x3f/0x90 [ 64.588124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.588866] RIP: 0033:0x7f276df8fd82 [ 64.589400] 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 [ 64.591908] RSP: 002b:00007ffe732d0998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.592950] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f276df8fd82 [ 64.593804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f276d3c9000 [ 64.594662] RBP: 00007f276d3c9000 R08: 0000000000000009 R09: 0000000000001000 [ 64.595507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c105412ec0 [ 64.596358] R13: 00007ffe732d09b0 R14: 00007ffe732d09e0 R15: 00007ffe732d0d40 [ 64.597216] </TASK> [ 64.597510] [ 64.597725] Allocated by task 218: [ 64.598176] kasan_save_stack+0x22/0x50 [ 64.598683] kasan_set_track+0x25/0x30 [ 64.599177] __kasan_slab_alloc+0x59/0x70 [ 64.599701] kmem_cache_alloc+0x16b/0x370 [ 64.600221] vm_area_dup+0x20/0x160 [ 64.600677] __split_vma+0x170/0x950 [ 64.601140] split_vma+0xc6/0x110 [ 64.601584] mprotect_fixup+0x8d2/0xb30 [ 64.602089] do_mprotect_pkey+0x87e/0xd40 [ 64.602611] __x64_sys_mprotect+0x78/0xc0 [ 64.603143] do_syscall_64+0x3f/0x90 [ 64.603617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.604264] [ 64.604482] Freed by task 13: [ 64.604866] kasan_save_stack+0x22/0x50 [ 64.605370] kasan_set_track+0x25/0x30 [ 64.605881] kasan_save_free_info+0x2b/0x50 [ 64.606426] __kasan_slab_free+0x10a/0x190 [ 64.606960] kmem_cache_free+0x10d/0x4d0 [ 64.607473] rcu_core+0x8c8/0x2860 [ 64.607917] __do_softirq+0x1b7/0x7d4 [ 64.608397] [ 64.608615] Last potentially related work creation: [ 64.609208] kasan_save_stack+0x22/0x50 [ 64.609720] __kasan_record_aux_stack+0x8e/0xa0 [ 64.610312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.610962] remove_vma+0x139/0x170 [ 64.611413] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.611969] do_vmi_munmap+0x1f1/0x2b0 [ 64.612458] __vm_munmap+0x138/0x3a0 [ 64.612931] __x64_sys_munmap+0x59/0x80 [ 64.613427] do_syscall_64+0x3f/0x90 [ 64.613910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.614556] [ 64.614774] The buggy address belongs to the object at ffff88800fff2bc8 [ 64.614774] which belongs to the cache vm_area_struct of size 168 [ 64.616253] The buggy address is located 88 bytes inside of [ 64.616253] freed 168-byte region [ffff88800fff2bc8, ffff88800fff2c70) [ 64.617669] [ 64.617900] The buggy address belongs to the physical page: [ 64.618598] page:000000002a14e888 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfff2 [ 64.619707] memcg:ffff88800edb2f01 [ 64.620169] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.620830] page_type: 0xffffffff() [ 64.621287] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.622290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edb2f01 [ 64.623226] page dumped because: kasan: bad access detected [ 64.623888] [ 64.624106] Memory state around the buggy address: [ 64.624682] ffff88800fff2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.625550] ffff88800fff2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 64.626428] >ffff88800fff2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 64.627283] ^ [ 64.627811] ffff88800fff2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 64.628668] ffff88800fff2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 64.629523] ================================================================== [ 64.630505] Disabling lock debugging due to kernel taint [ 66.507063] BUG: Bad rss-counter state mm:0000000093614a15 type:MM_FILEPAGES val:33 [ 66.507968] BUG: Bad rss-counter state mm:0000000093614a15 type:MM_ANONPAGES val:22 [ 67.005104] BUG: Bad rss-counter state mm:000000006e5afd0e type:MM_FILEPAGES val:33 [ 67.006363] BUG: Bad rss-counter state mm:000000006e5afd0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10628' (ECDSA) to the list of known hosts. 2023/06/20 01:27:20 fuzzer started 2023/06/20 01:27:21 dialing manager at localhost:44161 2023/06/20 01:27:21 checking machine... 2023/06/20 01:27:21 checking revisions... [ 67.750592] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:27:21 testing simple program... [ 67.801799] cgroup: Unknown subsys name 'net' [ 67.849248] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:26:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801432b680 RSI=ffffffff811431df RDI=0000000000000006 RBP=000000000ecffc60 RSP=ffff88801bbdfc38 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000080000 R14=ffffffff818c75ae R15=ffff88800c8ec680 RIP=ffffffff814c081b 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 00007f48deae2900 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=00007fff8ae58000 CR3=00000000183f8000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e0 RBX=00000000000000e0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800b9e01a0 RSP=ffff88801a07f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffff88800b9e0050 R14=ffff88800b9e0048 R15=ffff88800b9e0060 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=00007f48dea78000 CR3=000000001423c000 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=2030323a37323a3130203032206e754a XMM01=6964206465766965636552203a5d3433 XMM02=6f63736964203a31313a343330353420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a37323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000