syzkaller login: [ 46.503293] BUG: Bad rss-counter state mm:000000004024b562 type:MM_FILEPAGES val:33 [ 46.504498] BUG: Bad rss-counter state mm:000000004024b562 type:MM_ANONPAGES val:22 [ 46.545248] ================================================================== [ 46.546398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.547604] Read of size 8 at addr ffff888006868140 by task sshd/220 [ 46.548558] [ 46.548802] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.549887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.551095] Call Trace: [ 46.551435] [ 46.551739] dump_stack_lvl+0x91/0xf0 [ 46.552415] print_report+0xcc/0x620 [ 46.552947] ? __virt_addr_valid+0x102/0x340 [ 46.553557] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.554233] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.554932] kasan_report+0xbe/0xf0 [ 46.555457] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.556133] vma_interval_tree_remove+0xc75/0xec0 [ 46.556788] vma_prepare+0xc54/0x11a0 [ 46.557314] __split_vma+0x5af/0x950 [ 46.557835] ? __pfx___split_vma+0x10/0x10 [ 46.558413] ? find_held_lock+0x2c/0x110 [ 46.559000] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.559630] ? lock_is_held_type+0x9f/0x120 [ 46.560206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.560853] ? mtree_range_walk+0x632/0x900 [ 46.561441] ? mas_walk+0x5c7/0x7c0 [ 46.561948] do_vmi_munmap+0x1f1/0x2b0 [ 46.562477] mmap_region+0x1f9/0x2660 [ 46.562994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.563540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.564304] ? __pfx_lock_acquire+0x10/0x10 [ 46.564873] ? __pfx_mmap_region+0x10/0x10 [ 46.565436] ? security_mmap_addr+0x7d/0xa0 [ 46.566003] ? get_unmapped_area+0x1f5/0x3f0 [ 46.566601] do_mmap+0x854/0xf00 [ 46.567070] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.567600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.568198] ksys_mmap_pgoff+0x3af/0x500 [ 46.568736] do_syscall_64+0x3f/0x90 [ 46.569260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.569978] RIP: 0033:0x7f01fcbb9d82 [ 46.570484] 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 [ 46.572831] RSP: 002b:00007ffc2f513268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.573832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01fcbb9d82 [ 46.574772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01fbff3000 [ 46.575703] RBP: 00007f01fbff3000 R08: 0000000000000009 R09: 0000000000001000 [ 46.576641] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f51433f70 [ 46.577578] R13: 00007ffc2f513280 R14: 00007ffc2f5132b0 R15: 00007ffc2f513610 [ 46.578524] [ 46.579016] [ 46.579285] Allocated by task 213: [ 46.579809] kasan_save_stack+0x22/0x50 [ 46.580440] kasan_set_track+0x25/0x30 [ 46.581042] __kasan_slab_alloc+0x59/0x70 [ 46.581684] kmem_cache_alloc+0x16b/0x370 [ 46.582319] vm_area_dup+0x20/0x160 [ 46.582907] __split_vma+0x170/0x950 [ 46.583484] split_vma+0xc6/0x110 [ 46.584026] mprotect_fixup+0x8d2/0xb30 [ 46.584653] do_mprotect_pkey+0x87e/0xd40 [ 46.585289] __x64_sys_mprotect+0x78/0xc0 [ 46.585930] do_syscall_64+0x3f/0x90 [ 46.586505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.587318] [ 46.587582] Freed by task 213: [ 46.588007] kasan_save_stack+0x22/0x50 [ 46.588510] kasan_set_track+0x25/0x30 [ 46.589007] kasan_save_free_info+0x2b/0x50 [ 46.589545] __kasan_slab_free+0x10a/0x190 [ 46.590088] kmem_cache_free+0x10d/0x4d0 [ 46.590710] rcu_core+0x8c8/0x2860 [ 46.591156] __do_softirq+0x1b7/0x7d4 [ 46.591634] [ 46.591859] Last potentially related work creation: [ 46.592451] kasan_save_stack+0x22/0x50 [ 46.592961] __kasan_record_aux_stack+0x8e/0xa0 [ 46.593539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.594195] remove_vma+0x139/0x170 [ 46.594655] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.595230] do_vmi_munmap+0x1f1/0x2b0 [ 46.595727] __vm_munmap+0x138/0x3a0 [ 46.596207] __x64_sys_munmap+0x59/0x80 [ 46.596711] do_syscall_64+0x3f/0x90 [ 46.597191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.597846] [ 46.598062] Second to last potentially related work creation: [ 46.598779] kasan_save_stack+0x22/0x50 [ 46.599300] __kasan_record_aux_stack+0x8e/0xa0 [ 46.599878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.600519] remove_vma+0x139/0x170 [ 46.600973] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.601551] do_vmi_munmap+0x1f1/0x2b0 [ 46.602053] mmap_region+0x1f9/0x2660 [ 46.602537] do_mmap+0x854/0xf00 [ 46.602983] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.603477] ksys_mmap_pgoff+0x3af/0x500 [ 46.603981] do_syscall_64+0x3f/0x90 [ 46.604458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.605117] [ 46.605335] The buggy address belongs to the object at ffff8880068680e8 [ 46.605335] which belongs to the cache vm_area_struct of size 168 [ 46.606840] The buggy address is located 88 bytes inside of [ 46.606840] freed 168-byte region [ffff8880068680e8, ffff888006868190) [ 46.608254] [ 46.608474] The buggy address belongs to the physical page: [ 46.609135] page:0000000006e0eb32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6868 [ 46.610223] memcg:ffff88800d33b801 [ 46.610659] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.611371] page_type: 0xffffffff() [ 46.611826] raw: 0100000000000200 ffff88800879fc80 ffffea00003e1fc0 dead000000000005 [ 46.612751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d33b801 [ 46.613655] page dumped because: kasan: bad access detected [ 46.614318] [ 46.614535] Memory state around the buggy address: [ 46.615137] ffff888006868000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.616005] ffff888006868080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 46.616864] >ffff888006868100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.617717] ^ [ 46.618369] ffff888006868180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 46.619251] ffff888006868200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 46.620106] ================================================================== [ 46.621116] Disabling lock debugging due to kernel taint [ 49.174078] BUG: Bad rss-counter state mm:00000000e2f7bb92 type:MM_FILEPAGES val:33 [ 49.174840] BUG: Bad rss-counter state mm:00000000e2f7bb92 type:MM_ANONPAGES val:22 [ 49.658696] BUG: Bad rss-counter state mm:00000000b83807c9 type:MM_FILEPAGES val:33 [ 49.659717] BUG: Bad rss-counter state mm:00000000b83807c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47865' (ECDSA) to the list of known hosts. 2023/06/20 04:11:25 fuzzer started 2023/06/20 04:11:26 dialing manager at localhost:44161 2023/06/20 04:11:26 checking machine... 2023/06/20 04:11:26 checking revisions... [ 50.396941] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:26 testing simple program... [ 50.456025] cgroup: Unknown subsys name 'net' [ 50.489794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000002 RDX=0000000080000000 RSI=00000000000000b5 RDI=ffff88800ff6c000 RBP=0000000000000000 RSP=ffff888016eb7e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800ff6bef8 R13=ffff88800ff6b680 R14=0000000000000001 R15=ffff88800ff6ca80 RIP=ffffffff84519b7b RFL=00000286 [--S--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 00007f472703e700 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=00007f47b3056520 CR3=000000000f0a0000 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=2035323a31313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a31313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffff8880182ba000 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff88806cf09ba8 RBP=0000000000000000 RSP=ffff88806cf09ba0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=0000000000000000 R13=ffffea00005bd140 R14=ffffffff813782a8 R15=ffff888016f45508 RIP=ffffffff813ad640 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 00007f8942276900 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=00007fff67f10000 CR3=00000000199b2000 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=6720646572637465733a4d41503d706f 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