syzkaller login: [ 31.210665] BUG: Bad rss-counter state mm:000000000da26ba1 type:MM_FILEPAGES val:33 [ 31.211917] BUG: Bad rss-counter state mm:000000000da26ba1 type:MM_ANONPAGES val:22 [ 31.375739] ================================================================== [ 31.377018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.378027] Read of size 8 at addr ffff88800ea02310 by task sshd/220 [ 31.378800] [ 31.379018] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.379887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.380863] Call Trace: [ 31.381187] [ 31.381473] dump_stack_lvl+0x91/0xf0 [ 31.381966] print_report+0xcc/0x620 [ 31.382457] ? __virt_addr_valid+0x102/0x340 [ 31.383013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383631] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.384256] kasan_report+0xbe/0xf0 [ 31.384729] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385376] vma_interval_tree_remove+0xc75/0xec0 [ 31.385985] vma_prepare+0xc54/0x11a0 [ 31.386468] __split_vma+0x5af/0x950 [ 31.386943] ? __pfx___split_vma+0x10/0x10 [ 31.387479] ? find_held_lock+0x2c/0x110 [ 31.388006] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.388576] ? lock_is_held_type+0x9f/0x120 [ 31.389134] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.389744] ? mtree_range_walk+0x632/0x900 [ 31.390298] ? mas_walk+0x5c7/0x7c0 [ 31.390778] do_vmi_munmap+0x1f1/0x2b0 [ 31.391278] mmap_region+0x1f9/0x2660 [ 31.391763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.392278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.393004] ? __pfx_lock_acquire+0x10/0x10 [ 31.393546] ? __pfx_mmap_region+0x10/0x10 [ 31.394084] ? security_mmap_addr+0x7d/0xa0 [ 31.394621] ? get_unmapped_area+0x1f5/0x3f0 [ 31.395168] do_mmap+0x854/0xf00 [ 31.395609] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.396114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.396685] ksys_mmap_pgoff+0x3af/0x500 [ 31.397210] do_syscall_64+0x3f/0x90 [ 31.397691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398347] RIP: 0033:0x7f8994348d82 [ 31.398805] 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 [ 31.400984] RSP: 002b:00007ffc75ea6088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.401907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8994348d82 [ 31.402759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8993782000 [ 31.403628] RBP: 00007f8993782000 R08: 0000000000000009 R09: 0000000000001000 [ 31.404484] R10: 0000000000000812 R11: 0000000000000206 R12: 000055598f797d90 [ 31.405360] R13: 00007ffc75ea60a0 R14: 00007ffc75ea60d0 R15: 00007ffc75ea6430 [ 31.406238] [ 31.406531] [ 31.406746] Allocated by task 213: [ 31.407177] kasan_save_stack+0x22/0x50 [ 31.407681] kasan_set_track+0x25/0x30 [ 31.408180] __kasan_slab_alloc+0x59/0x70 [ 31.408723] kmem_cache_alloc+0x16b/0x370 [ 31.409273] vm_area_dup+0x20/0x160 [ 31.409730] __split_vma+0x170/0x950 [ 31.410195] split_vma+0xc6/0x110 [ 31.410637] mprotect_fixup+0x8d2/0xb30 [ 31.411147] do_mprotect_pkey+0x87e/0xd40 [ 31.411672] __x64_sys_mprotect+0x78/0xc0 [ 31.412205] do_syscall_64+0x3f/0x90 [ 31.412687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.413356] [ 31.413575] Freed by task 213: [ 31.413977] kasan_save_stack+0x22/0x50 [ 31.414502] kasan_set_track+0x25/0x30 [ 31.414996] kasan_save_free_info+0x2b/0x50 [ 31.415529] __kasan_slab_free+0x10a/0x190 [ 31.416067] kmem_cache_free+0x10d/0x4d0 [ 31.416576] rcu_core+0x8c8/0x2860 [ 31.417035] __do_softirq+0x1b7/0x7d4 [ 31.417520] [ 31.417733] Last potentially related work creation: [ 31.418316] kasan_save_stack+0x22/0x50 [ 31.418818] __kasan_record_aux_stack+0x8e/0xa0 [ 31.419399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.420046] remove_vma+0x139/0x170 [ 31.420497] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.421074] do_vmi_munmap+0x1f1/0x2b0 [ 31.421559] __vm_munmap+0x138/0x3a0 [ 31.422030] __x64_sys_munmap+0x59/0x80 [ 31.422549] do_syscall_64+0x3f/0x90 [ 31.423023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423675] [ 31.423898] The buggy address belongs to the object at ffff88800ea022b8 [ 31.423898] which belongs to the cache vm_area_struct of size 168 [ 31.425387] The buggy address is located 88 bytes inside of [ 31.425387] freed 168-byte region [ffff88800ea022b8, ffff88800ea02360) [ 31.426784] [ 31.426998] The buggy address belongs to the physical page: [ 31.427667] page:000000004a6ce2b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea02 [ 31.428755] memcg:ffff88801445c801 [ 31.429187] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.429838] page_type: 0xffffffff() [ 31.430293] raw: 0100000000000200 ffff8880087a0c80 ffffea0000324200 dead000000000008 [ 31.431214] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801445c801 [ 31.432129] page dumped because: kasan: bad access detected [ 31.432819] [ 31.433049] Memory state around the buggy address: [ 31.433632] ffff88800ea02200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.434523] ffff88800ea02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.435401] >ffff88800ea02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.436256] ^ [ 31.436731] ffff88800ea02380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.437593] ffff88800ea02400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.438443] ================================================================== [ 31.439585] Disabling lock debugging due to kernel taint [ 33.738457] BUG: Bad rss-counter state mm:00000000dcdf87c4 type:MM_FILEPAGES val:33 [ 33.739759] BUG: Bad rss-counter state mm:00000000dcdf87c4 type:MM_ANONPAGES val:22 [ 34.314300] BUG: Bad rss-counter state mm:00000000c0ca3226 type:MM_FILEPAGES val:33 [ 34.315492] BUG: Bad rss-counter state mm:00000000c0ca3226 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5921' (ECDSA) to the list of known hosts. 2023/06/20 13:58:41 fuzzer started 2023/06/20 13:58:41 dialing manager at localhost:36067 2023/06/20 13:58:41 checking machine... 2023/06/20 13:58:41 checking revisions... [ 34.983978] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:58:41 testing simple program... [ 35.041446] cgroup: Unknown subsys name 'net' [ 35.082661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8186b7e1 RDX=ffff888008d90000 RSI=0000000000000100 RDI=0000000000000001 RBP=ffff88800ed27b80 RSP=ffff888008d9fd28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff88800e5d8700 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800ed27b80 RIP=ffffffff8186b7e1 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=00007f4c3b7a0e90 CR3=000000000c786000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e2da6d995853b54c00000000000ae988 XMM05=9ff4ba47fec7dd190000000000132f98 XMM06=4fda316b135da52b0000000000131d88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000056f3833d RCX=ffff88806c5c19e8 RDX=000000000000000b RSI=ffffffff8180effe RDI=00000000f4dbe5c7 RBP=ffff88801002da20 RSP=ffff88800f5efa90 R8 =0000000012056645 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f5efaf8 R15=000000000000000b RIP=ffffffff822704fc RFL=00000206 [-----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 00007f0aaa02c900 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=00007ffc7e24f000 CR3=000000000db9a000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000