syzkaller login: [ 28.874705] BUG: Bad rss-counter state mm:00000000c9c35bbe type:MM_FILEPAGES val:33 [ 28.875992] BUG: Bad rss-counter state mm:00000000c9c35bbe type:MM_ANONPAGES val:22 [ 29.006090] ================================================================== [ 29.007036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.007994] Read of size 8 at addr ffff88800e124b38 by task sshd/220 [ 29.008771] [ 29.008997] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.010025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.011208] Call Trace: [ 29.011531] [ 29.011820] dump_stack_lvl+0x91/0xf0 [ 29.012317] print_report+0xcc/0x620 [ 29.012854] ? __virt_addr_valid+0x102/0x340 [ 29.013431] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.014058] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.014703] kasan_report+0xbe/0xf0 [ 29.015191] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.015823] vma_interval_tree_remove+0xc75/0xec0 [ 29.016435] vma_prepare+0xc54/0x11a0 [ 29.016932] __split_vma+0x5af/0x950 [ 29.017418] ? __pfx___split_vma+0x10/0x10 [ 29.017955] ? find_held_lock+0x2c/0x110 [ 29.018480] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.019057] ? lock_is_held_type+0x9f/0x120 [ 29.019601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.020224] ? mtree_range_walk+0x632/0x900 [ 29.020782] ? mas_walk+0x5c7/0x7c0 [ 29.021282] do_vmi_munmap+0x1f1/0x2b0 [ 29.021786] mmap_region+0x1f9/0x2660 [ 29.022287] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.022805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.023514] ? __pfx_lock_acquire+0x10/0x10 [ 29.024048] ? __pfx_mmap_region+0x10/0x10 [ 29.024579] ? security_mmap_addr+0x7d/0xa0 [ 29.025125] ? get_unmapped_area+0x1f5/0x3f0 [ 29.025674] do_mmap+0x854/0xf00 [ 29.026118] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.026619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.027186] ksys_mmap_pgoff+0x3af/0x500 [ 29.027698] do_syscall_64+0x3f/0x90 [ 29.028182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.028833] RIP: 0033:0x7fa62ddb4d82 [ 29.029310] 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 [ 29.031451] RSP: 002b:00007ffe13e29468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.032373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa62ddb4d82 [ 29.033236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa62d1ee000 [ 29.034094] RBP: 00007fa62d1ee000 R08: 0000000000000009 R09: 0000000000001000 [ 29.034944] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585024dd980 [ 29.035804] R13: 00007ffe13e29480 R14: 00007ffe13e294b0 R15: 00007ffe13e29810 [ 29.036665] [ 29.036969] [ 29.037187] Allocated by task 213: [ 29.037616] kasan_save_stack+0x22/0x50 [ 29.038132] kasan_set_track+0x25/0x30 [ 29.038631] __kasan_slab_alloc+0x59/0x70 [ 29.039160] kmem_cache_alloc+0x16b/0x370 [ 29.039701] vm_area_dup+0x20/0x160 [ 29.040163] __split_vma+0x170/0x950 [ 29.040632] split_vma+0xc6/0x110 [ 29.041113] mprotect_fixup+0x8d2/0xb30 [ 29.041631] do_mprotect_pkey+0x87e/0xd40 [ 29.042159] __x64_sys_mprotect+0x78/0xc0 [ 29.042696] do_syscall_64+0x3f/0x90 [ 29.043177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.043822] [ 29.044039] Freed by task 204: [ 29.044437] kasan_save_stack+0x22/0x50 [ 29.044973] kasan_set_track+0x25/0x30 [ 29.045499] kasan_save_free_info+0x2b/0x50 [ 29.046022] __kasan_slab_free+0x10a/0x190 [ 29.046694] kmem_cache_free+0x10d/0x4d0 [ 29.047185] rcu_core+0x8c8/0x2860 [ 29.047611] __do_softirq+0x1b7/0x7d4 [ 29.048063] [ 29.048266] Last potentially related work creation: [ 29.048850] kasan_save_stack+0x22/0x50 [ 29.049393] __kasan_record_aux_stack+0x8e/0xa0 [ 29.049975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.050622] remove_vma+0x139/0x170 [ 29.051085] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.051652] do_vmi_munmap+0x1f1/0x2b0 [ 29.052217] __vm_munmap+0x138/0x3a0 [ 29.052691] __x64_sys_munmap+0x59/0x80 [ 29.053220] do_syscall_64+0x3f/0x90 [ 29.053693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.054347] [ 29.054566] The buggy address belongs to the object at ffff88800e124ae0 [ 29.054566] which belongs to the cache vm_area_struct of size 168 [ 29.056068] The buggy address is located 88 bytes inside of [ 29.056068] freed 168-byte region [ffff88800e124ae0, ffff88800e124b88) [ 29.057541] [ 29.057765] The buggy address belongs to the physical page: [ 29.058432] page:000000005a853a5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe124 [ 29.059514] memcg:ffff8880097dac01 [ 29.059945] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.060648] page_type: 0xffffffff() [ 29.061118] raw: 0100000000000200 ffff88800879fc80 ffffea000038bf40 dead000000000003 [ 29.062042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097dac01 [ 29.062956] page dumped because: kasan: bad access detected [ 29.063615] [ 29.063834] Memory state around the buggy address: [ 29.064414] ffff88800e124a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.065281] ffff88800e124a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.066157] >ffff88800e124b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.067028] ^ [ 29.067641] ffff88800e124b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.068498] ffff88800e124c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.069368] ================================================================== [ 29.070315] Disabling lock debugging due to kernel taint [ 30.950674] BUG: Bad rss-counter state mm:00000000056afa54 type:MM_FILEPAGES val:33 [ 30.951469] BUG: Bad rss-counter state mm:00000000056afa54 type:MM_ANONPAGES val:22 [ 31.418688] BUG: Bad rss-counter state mm:0000000048e42e04 type:MM_FILEPAGES val:33 [ 31.419700] BUG: Bad rss-counter state mm:0000000048e42e04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17089' (ECDSA) to the list of known hosts. 2023/06/20 00:51:44 fuzzer started 2023/06/20 00:51:45 dialing manager at localhost:44161 2023/06/20 00:51:45 checking machine... 2023/06/20 00:51:45 checking revisions... [ 32.139085] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:51:45 testing simple program... [ 32.186299] cgroup: Unknown subsys name 'net' [ 32.232018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801aaaf130 RCX=ffff88801aaaf130 RDX=00000000000d0007 RSI=ffff88801aaaf130 RDI=ffff88800844f780 RBP=ffff888009b37c08 RSP=ffff888009b37b70 R8 =00000000000d0006 R9 =0000000000000000 R10=ffffea00006aabc0 R11=00000000000d0007 R12=ffffea00006aabc0 R13=ffff88801aaaf260 R14=00000000000d0006 R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fa879168900 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=00007fa8797200b0 CR3=000000000e6c6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006097 RSI=000000000000132f RDI=ffffffff864ec880 RBP=ffff888008e579d0 RSP=ffff888008e578b8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 RIP=ffffffff81130837 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 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=00007f6a72c99bd0 CR3=0000000018d62000 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=2034343a31353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000