syzkaller login: [ 34.289545] BUG: Bad rss-counter state mm:000000005810bbe7 type:MM_FILEPAGES val:33 [ 34.290528] BUG: Bad rss-counter state mm:000000005810bbe7 type:MM_ANONPAGES val:22 [ 34.457375] ================================================================== [ 34.458277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.459212] Read of size 8 at addr ffff88800e39adf0 by task sshd/221 [ 34.460006] [ 34.460230] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.461312] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.462295] Call Trace: [ 34.462611] [ 34.462898] dump_stack_lvl+0x91/0xf0 [ 34.463393] print_report+0xcc/0x620 [ 34.463882] ? __virt_addr_valid+0x102/0x340 [ 34.464449] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.465070] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.465686] kasan_report+0xbe/0xf0 [ 34.466166] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.466794] vma_interval_tree_remove+0xc75/0xec0 [ 34.467395] vma_prepare+0xc54/0x11a0 [ 34.467900] __split_vma+0x5af/0x950 [ 34.468369] ? __pfx___split_vma+0x10/0x10 [ 34.468911] ? find_held_lock+0x2c/0x110 [ 34.469435] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.469994] ? lock_is_held_type+0x9f/0x120 [ 34.470527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.471131] ? mtree_range_walk+0x632/0x900 [ 34.471681] ? mas_walk+0x5c7/0x7c0 [ 34.472186] do_vmi_munmap+0x1f1/0x2b0 [ 34.472679] mmap_region+0x1f9/0x2660 [ 34.473161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.473677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.474395] ? __pfx_lock_acquire+0x10/0x10 [ 34.474931] ? __pfx_mmap_region+0x10/0x10 [ 34.475459] ? security_mmap_addr+0x7d/0xa0 [ 34.476004] ? get_unmapped_area+0x1f5/0x3f0 [ 34.476563] do_mmap+0x854/0xf00 [ 34.476998] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.477500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.478083] ksys_mmap_pgoff+0x3af/0x500 [ 34.478604] do_syscall_64+0x3f/0x90 [ 34.479086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.479752] RIP: 0033:0x7f7945755d82 [ 34.480210] 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 [ 34.482335] RSP: 002b:00007ffc8926c1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.483235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7945755d82 [ 34.484088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7944b8f000 [ 34.484943] RBP: 00007f7944b8f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.485789] R10: 0000000000000812 R11: 0000000000000206 R12: 000055572682fec0 [ 34.486635] R13: 00007ffc8926c210 R14: 00007ffc8926c240 R15: 00007ffc8926c5a0 [ 34.487493] [ 34.487799] [ 34.488015] Allocated by task 214: [ 34.488444] kasan_save_stack+0x22/0x50 [ 34.488955] kasan_set_track+0x25/0x30 [ 34.489444] __kasan_slab_alloc+0x59/0x70 [ 34.489965] kmem_cache_alloc+0x16b/0x370 [ 34.490483] vm_area_dup+0x20/0x160 [ 34.490937] __split_vma+0x170/0x950 [ 34.491398] split_vma+0xc6/0x110 [ 34.491856] mprotect_fixup+0x8d2/0xb30 [ 34.492357] do_mprotect_pkey+0x87e/0xd40 [ 34.492881] __x64_sys_mprotect+0x78/0xc0 [ 34.493404] do_syscall_64+0x3f/0x90 [ 34.493880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.494548] [ 34.494772] Freed by task 214: [ 34.495176] kasan_save_stack+0x22/0x50 [ 34.495697] kasan_set_track+0x25/0x30 [ 34.496235] kasan_save_free_info+0x2b/0x50 [ 34.496794] __kasan_slab_free+0x10a/0x190 [ 34.497325] kmem_cache_free+0x10d/0x4d0 [ 34.497843] rcu_core+0x8c8/0x2860 [ 34.498289] __do_softirq+0x1b7/0x7d4 [ 34.498765] [ 34.498984] Last potentially related work creation: [ 34.499585] kasan_save_stack+0x22/0x50 [ 34.500114] __kasan_record_aux_stack+0x8e/0xa0 [ 34.500715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.501391] remove_vma+0x139/0x170 [ 34.501869] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.502442] do_vmi_munmap+0x1f1/0x2b0 [ 34.502949] __vm_munmap+0x138/0x3a0 [ 34.503414] __x64_sys_munmap+0x59/0x80 [ 34.503933] do_syscall_64+0x3f/0x90 [ 34.504409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.505059] [ 34.505275] Second to last potentially related work creation: [ 34.505977] kasan_save_stack+0x22/0x50 [ 34.506485] __kasan_record_aux_stack+0x8e/0xa0 [ 34.507068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.507730] remove_vma+0x139/0x170 [ 34.508190] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.508757] do_vmi_munmap+0x1f1/0x2b0 [ 34.509243] mmap_region+0x1f9/0x2660 [ 34.509723] do_mmap+0x854/0xf00 [ 34.510159] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.510645] ksys_mmap_pgoff+0x3af/0x500 [ 34.511148] do_syscall_64+0x3f/0x90 [ 34.511626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.512282] [ 34.512496] The buggy address belongs to the object at ffff88800e39ad98 [ 34.512496] which belongs to the cache vm_area_struct of size 168 [ 34.513958] The buggy address is located 88 bytes inside of [ 34.513958] freed 168-byte region [ffff88800e39ad98, ffff88800e39ae40) [ 34.515363] [ 34.515577] The buggy address belongs to the physical page: [ 34.516246] page:00000000da22a8bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe39a [ 34.517324] memcg:ffff888009a22b01 [ 34.517756] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.518399] page_type: 0xffffffff() [ 34.518850] raw: 0100000000000200 ffff88800879fc80 ffffea000036d180 dead000000000002 [ 34.519772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a22b01 [ 34.520681] page dumped because: kasan: bad access detected [ 34.521335] [ 34.521552] Memory state around the buggy address: [ 34.522130] ffff88800e39ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.522983] ffff88800e39ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.523851] >ffff88800e39ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.524694] ^ [ 34.525500] ffff88800e39ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.526357] ffff88800e39ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.527216] ================================================================== [ 34.528193] Disabling lock debugging due to kernel taint [ 36.325702] BUG: Bad rss-counter state mm:00000000ca669ce8 type:MM_FILEPAGES val:33 [ 36.326777] BUG: Bad rss-counter state mm:00000000ca669ce8 type:MM_ANONPAGES val:22 [ 36.836148] BUG: Bad rss-counter state mm:00000000875d2658 type:MM_FILEPAGES val:33 [ 36.837464] BUG: Bad rss-counter state mm:00000000875d2658 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4935' (ECDSA) to the list of known hosts. 2023/06/19 11:00:26 fuzzer started 2023/06/19 11:00:26 dialing manager at localhost:44161 2023/06/19 11:00:26 checking machine... 2023/06/19 11:00:26 checking revisions... [ 37.437268] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:00:27 testing simple program... [ 37.487569] cgroup: Unknown subsys name 'net' [ 37.544272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f6e25177160 CR3=00000000102c0000 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=2036323a30303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b41eab RBX=ffff88800da0f528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800da0f558 RBP=ffff888019248000 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019274500 R14=ffffffff818d9dc6 R15=ffff88800dc91400 RIP=ffffffff8184636c RFL=00000046 [---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 00007f2a90aea900 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=00007f2a90aa3008 CR3=000000000c47a000 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