syzkaller login: [ 38.685647] BUG: Bad rss-counter state mm:00000000a29e3116 type:MM_FILEPAGES val:33 [ 38.686984] BUG: Bad rss-counter state mm:00000000a29e3116 type:MM_ANONPAGES val:22 [ 38.835814] ================================================================== [ 38.836972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.837864] Read of size 8 at addr ffff888014071ed8 by task sshd/220 [ 38.838630] [ 38.838816] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.839552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.840376] Call Trace: [ 38.840662] [ 38.840905] dump_stack_lvl+0x91/0xf0 [ 38.841314] print_report+0xcc/0x620 [ 38.841728] ? __virt_addr_valid+0x102/0x340 [ 38.842194] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842711] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843230] kasan_report+0xbe/0xf0 [ 38.843630] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.844145] vma_interval_tree_remove+0xc75/0xec0 [ 38.844649] vma_prepare+0xc54/0x11a0 [ 38.845050] __split_vma+0x5af/0x950 [ 38.845454] ? __pfx___split_vma+0x10/0x10 [ 38.845896] ? find_held_lock+0x2c/0x110 [ 38.846335] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.846809] ? lock_is_held_type+0x9f/0x120 [ 38.847264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.847769] ? mtree_range_walk+0x632/0x900 [ 38.848230] ? mas_walk+0x5c7/0x7c0 [ 38.848659] do_vmi_munmap+0x1f1/0x2b0 [ 38.849074] mmap_region+0x1f9/0x2660 [ 38.849484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.849916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.850519] ? __pfx_lock_acquire+0x10/0x10 [ 38.850965] ? __pfx_mmap_region+0x10/0x10 [ 38.851407] ? security_mmap_addr+0x7d/0xa0 [ 38.851850] ? get_unmapped_area+0x1f5/0x3f0 [ 38.852308] do_mmap+0x854/0xf00 [ 38.852678] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.853091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.853558] ksys_mmap_pgoff+0x3af/0x500 [ 38.853981] do_syscall_64+0x3f/0x90 [ 38.854381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854923] RIP: 0033:0x7f136a05ad82 [ 38.855309] 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 [ 38.857099] RSP: 002b:00007ffe098df1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.857861] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f136a05ad82 [ 38.858578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1369494000 [ 38.859280] RBP: 00007f1369494000 R08: 0000000000000009 R09: 0000000000001000 [ 38.859988] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557c3e7fb20 [ 38.860709] R13: 00007ffe098df1f0 R14: 00007ffe098df220 R15: 00007ffe098df580 [ 38.861430] [ 38.861675] [ 38.861856] Allocated by task 213: [ 38.862212] kasan_save_stack+0x22/0x50 [ 38.862631] kasan_set_track+0x25/0x30 [ 38.863040] __kasan_slab_alloc+0x59/0x70 [ 38.863479] kmem_cache_alloc+0x16b/0x370 [ 38.863905] vm_area_dup+0x20/0x160 [ 38.864281] __split_vma+0x170/0x950 [ 38.864688] split_vma+0xc6/0x110 [ 38.865058] mprotect_fixup+0x8d2/0xb30 [ 38.865479] do_mprotect_pkey+0x87e/0xd40 [ 38.865909] __x64_sys_mprotect+0x78/0xc0 [ 38.866346] do_syscall_64+0x3f/0x90 [ 38.866748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867284] [ 38.867468] Freed by task 213: [ 38.867792] kasan_save_stack+0x22/0x50 [ 38.868207] kasan_set_track+0x25/0x30 [ 38.868620] kasan_save_free_info+0x2b/0x50 [ 38.869062] __kasan_slab_free+0x10a/0x190 [ 38.869506] kmem_cache_free+0x10d/0x4d0 [ 38.869929] rcu_core+0x8c8/0x2860 [ 38.870294] __do_softirq+0x1b7/0x7d4 [ 38.870686] [ 38.870861] Last potentially related work creation: [ 38.871348] kasan_save_stack+0x22/0x50 [ 38.871760] __kasan_record_aux_stack+0x8e/0xa0 [ 38.872233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872780] remove_vma+0x139/0x170 [ 38.873150] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873609] do_vmi_munmap+0x1f1/0x2b0 [ 38.874016] __vm_munmap+0x138/0x3a0 [ 38.874398] __x64_sys_munmap+0x59/0x80 [ 38.874803] do_syscall_64+0x3f/0x90 [ 38.875196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875723] [ 38.875899] The buggy address belongs to the object at ffff888014071e80 [ 38.875899] which belongs to the cache vm_area_struct of size 168 [ 38.877121] The buggy address is located 88 bytes inside of [ 38.877121] freed 168-byte region [ffff888014071e80, ffff888014071f28) [ 38.878278] [ 38.878455] The buggy address belongs to the physical page: [ 38.879000] page:0000000024159f14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14071 [ 38.879904] memcg:ffff88800efaef01 [ 38.880254] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.880806] page_type: 0xffffffff() [ 38.881180] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a5940 dead000000000002 [ 38.881948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efaef01 [ 38.882704] page dumped because: kasan: bad access detected [ 38.883252] [ 38.883427] Memory state around the buggy address: [ 38.883907] ffff888014071d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.884625] ffff888014071e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.885339] >ffff888014071e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.886044] ^ [ 38.886652] ffff888014071f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.887367] ffff888014071f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.888076] ================================================================== [ 38.889139] Disabling lock debugging due to kernel taint [ 40.778343] BUG: Bad rss-counter state mm:00000000321fa4bc type:MM_FILEPAGES val:33 [ 40.779514] BUG: Bad rss-counter state mm:00000000321fa4bc type:MM_ANONPAGES val:22 [ 41.151409] BUG: Bad rss-counter state mm:000000006e41c523 type:MM_FILEPAGES val:33 [ 41.152344] BUG: Bad rss-counter state mm:000000006e41c523 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47750' (ECDSA) to the list of known hosts. 2023/06/21 07:04:56 fuzzer started 2023/06/21 07:04:56 dialing manager at localhost:36067 2023/06/21 07:04:56 checking machine... 2023/06/21 07:04:56 checking revisions... [ 41.872761] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:04:56 testing simple program... [ 41.923049] cgroup: Unknown subsys name 'net' [ 41.989282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019b865c0 RCX=ffffffff818e3722 RDX=ffff888019eab680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016b47a80 RSP=ffff888016b47a48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=7962206d65687420 R12=ffff888008c14db0 R13=ffff888008c14da0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c02c5 RFL=00000293 [--S-A-C] 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 00007fb43c7bf900 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=00007fb43cd74650 CR3=000000000c520000 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=00007ffe93b9d998 CR3=000000000db86000 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=2036353a34303a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000