syzkaller login: [ 30.156519] BUG: Bad rss-counter state mm:00000000ab81bc61 type:MM_FILEPAGES val:33 [ 30.158182] BUG: Bad rss-counter state mm:00000000ab81bc61 type:MM_ANONPAGES val:22 [ 30.310415] ================================================================== [ 30.311328] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.312259] Read of size 8 at addr ffff888016a6a5c8 by task sshd/221 [ 30.313032] [ 30.313248] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.314317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.315313] Call Trace: [ 30.315636] [ 30.315926] dump_stack_lvl+0x91/0xf0 [ 30.316423] print_report+0xcc/0x620 [ 30.316917] ? __virt_addr_valid+0x102/0x340 [ 30.317506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.318137] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.318747] kasan_report+0xbe/0xf0 [ 30.319224] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.319843] vma_interval_tree_remove+0xc75/0xec0 [ 30.320446] vma_prepare+0xc54/0x11a0 [ 30.320930] __split_vma+0x5af/0x950 [ 30.321407] ? __pfx___split_vma+0x10/0x10 [ 30.321973] ? find_held_lock+0x2c/0x110 [ 30.322495] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.323059] ? lock_is_held_type+0x9f/0x120 [ 30.323595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.324199] ? mtree_range_walk+0x632/0x900 [ 30.324754] ? mas_walk+0x5c7/0x7c0 [ 30.325228] do_vmi_munmap+0x1f1/0x2b0 [ 30.325736] mmap_region+0x1f9/0x2660 [ 30.326221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.326727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.327446] ? __pfx_lock_acquire+0x10/0x10 [ 30.327981] ? __pfx_mmap_region+0x10/0x10 [ 30.328513] ? security_mmap_addr+0x7d/0xa0 [ 30.329041] ? get_unmapped_area+0x1f5/0x3f0 [ 30.329607] do_mmap+0x854/0xf00 [ 30.330046] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.330536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.331091] ksys_mmap_pgoff+0x3af/0x500 [ 30.331593] do_syscall_64+0x3f/0x90 [ 30.332076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.332721] RIP: 0033:0x7f39c05d8d82 [ 30.333173] 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 [ 30.335310] RSP: 002b:00007fffcbc0aa68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.336216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39c05d8d82 [ 30.337073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39bfa12000 [ 30.337937] RBP: 00007f39bfa12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.338782] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f55a64ec0 [ 30.339626] R13: 00007fffcbc0aa80 R14: 00007fffcbc0aab0 R15: 00007fffcbc0ae10 [ 30.340477] [ 30.340766] [ 30.340980] Allocated by task 214: [ 30.341415] kasan_save_stack+0x22/0x50 [ 30.341932] kasan_set_track+0x25/0x30 [ 30.342422] __kasan_slab_alloc+0x59/0x70 [ 30.342943] kmem_cache_alloc+0x16b/0x370 [ 30.343463] vm_area_dup+0x20/0x160 [ 30.343911] __split_vma+0x170/0x950 [ 30.344374] split_vma+0xc6/0x110 [ 30.344809] mprotect_fixup+0x8d2/0xb30 [ 30.345309] do_mprotect_pkey+0x87e/0xd40 [ 30.345840] __x64_sys_mprotect+0x78/0xc0 [ 30.346366] do_syscall_64+0x3f/0x90 [ 30.346836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347477] [ 30.347690] Freed by task 214: [ 30.348082] kasan_save_stack+0x22/0x50 [ 30.348588] kasan_set_track+0x25/0x30 [ 30.349073] kasan_save_free_info+0x2b/0x50 [ 30.349626] __kasan_slab_free+0x10a/0x190 [ 30.350159] kmem_cache_free+0x10d/0x4d0 [ 30.350663] rcu_core+0x8c8/0x2860 [ 30.351106] __do_softirq+0x1b7/0x7d4 [ 30.351587] [ 30.351804] Last potentially related work creation: [ 30.352395] kasan_save_stack+0x22/0x50 [ 30.352896] __kasan_record_aux_stack+0x8e/0xa0 [ 30.353466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.354113] remove_vma+0x139/0x170 [ 30.354636] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.355189] do_vmi_munmap+0x1f1/0x2b0 [ 30.355670] __vm_munmap+0x138/0x3a0 [ 30.356133] __x64_sys_munmap+0x59/0x80 [ 30.356628] do_syscall_64+0x3f/0x90 [ 30.357101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.357767] [ 30.357981] The buggy address belongs to the object at ffff888016a6a570 [ 30.357981] which belongs to the cache vm_area_struct of size 168 [ 30.359445] The buggy address is located 88 bytes inside of [ 30.359445] freed 168-byte region [ffff888016a6a570, ffff888016a6a618) [ 30.360841] [ 30.361056] The buggy address belongs to the physical page: [ 30.361720] page:00000000c0d97bb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a6a [ 30.362811] memcg:ffff888019c63d01 [ 30.363234] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.363888] page_type: 0xffffffff() [ 30.364341] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.365271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c63d01 [ 30.366180] page dumped because: kasan: bad access detected [ 30.366836] [ 30.367053] Memory state around the buggy address: [ 30.367641] ffff888016a6a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.368493] ffff888016a6a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.369351] >ffff888016a6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.370216] ^ [ 30.370884] ffff888016a6a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.371733] ffff888016a6a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.372580] ================================================================== [ 30.373533] Disabling lock debugging due to kernel taint [ 32.571383] BUG: Bad rss-counter state mm:00000000a8dc8ce0 type:MM_FILEPAGES val:33 [ 32.572385] BUG: Bad rss-counter state mm:00000000a8dc8ce0 type:MM_ANONPAGES val:22 [ 33.109408] BUG: Bad rss-counter state mm:0000000006f0d626 type:MM_FILEPAGES val:33 [ 33.110645] BUG: Bad rss-counter state mm:0000000006f0d626 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14266' (ECDSA) to the list of known hosts. 2023/06/20 20:11:12 fuzzer started 2023/06/20 20:11:12 dialing manager at localhost:36067 2023/06/20 20:11:12 checking machine... 2023/06/20 20:11:12 checking revisions... [ 33.712341] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:11:12 testing simple program... [ 33.762737] cgroup: Unknown subsys name 'net' [ 33.816722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:11:12 Registers: info registers vcpu 0 RAX=ffffed1003672e00 RBX=ffffed1003673000 RCX=ffffffff82157d07 RDX=0000000000000200 RSI=0000000000001000 RDI=ffff88801b397000 RBP=ffffed1003672e00 RSP=ffff888018277978 R8 =0000000000000000 R9 =ffffed1003672fff R10=ffff88801b397fff R11=0000000000000200 R12=ffff88801b397000 R13=0000560b2d753e90 R14=0000000000000000 R15=ffff888018277db0 RIP=ffffffff8180f0c6 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 00007f7862aa5900 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=00007f786305a650 CR3=0000000018192000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=000055895294d000 CR3=0000000015f7e000 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=2032313a31313a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31313a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000