syzkaller login: [ 32.150425] BUG: Bad rss-counter state mm:00000000bf039e65 type:MM_FILEPAGES val:33 [ 32.151646] BUG: Bad rss-counter state mm:00000000bf039e65 type:MM_ANONPAGES val:22 [ 32.311986] ================================================================== [ 32.313118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.314374] Read of size 8 at addr ffff88800ec2d3f8 by task sshd/219 [ 32.315156] [ 32.315377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.316289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.317298] Call Trace: [ 32.317641] [ 32.317938] dump_stack_lvl+0x91/0xf0 [ 32.318445] print_report+0xcc/0x620 [ 32.318967] ? __virt_addr_valid+0x102/0x340 [ 32.319536] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.320170] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.320817] kasan_report+0xbe/0xf0 [ 32.321310] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.321978] vma_interval_tree_remove+0xc75/0xec0 [ 32.322594] vma_prepare+0xc54/0x11a0 [ 32.323065] __split_vma+0x5af/0x950 [ 32.323535] ? __pfx___split_vma+0x10/0x10 [ 32.324065] ? find_held_lock+0x2c/0x110 [ 32.324578] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.325134] ? lock_is_held_type+0x9f/0x120 [ 32.325686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.326281] ? mtree_range_walk+0x632/0x900 [ 32.326829] ? mas_walk+0x5c7/0x7c0 [ 32.327314] do_vmi_munmap+0x1f1/0x2b0 [ 32.327805] mmap_region+0x1f9/0x2660 [ 32.328278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.328784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.329499] ? __pfx_lock_acquire+0x10/0x10 [ 32.330031] ? __pfx_mmap_region+0x10/0x10 [ 32.330563] ? security_mmap_addr+0x7d/0xa0 [ 32.331090] ? get_unmapped_area+0x1f5/0x3f0 [ 32.331631] do_mmap+0x854/0xf00 [ 32.332068] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.332557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.333116] ksys_mmap_pgoff+0x3af/0x500 [ 32.333640] do_syscall_64+0x3f/0x90 [ 32.334114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.334755] RIP: 0033:0x7fc1fc43bd82 [ 32.335205] 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 [ 32.337314] RSP: 002b:00007ffd837193f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.338225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1fc43bd82 [ 32.339065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1fb875000 [ 32.339906] RBP: 00007fc1fb875000 R08: 0000000000000009 R09: 0000000000001000 [ 32.340751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556acee37f70 [ 32.341601] R13: 00007ffd83719410 R14: 00007ffd83719440 R15: 00007ffd837197a0 [ 32.342471] [ 32.342768] [ 32.342983] Allocated by task 212: [ 32.343423] kasan_save_stack+0x22/0x50 [ 32.343926] kasan_set_track+0x25/0x30 [ 32.344425] __kasan_slab_alloc+0x59/0x70 [ 32.344964] kmem_cache_alloc+0x16b/0x370 [ 32.345508] vm_area_dup+0x20/0x160 [ 32.345961] __split_vma+0x170/0x950 [ 32.346437] split_vma+0xc6/0x110 [ 32.346880] mprotect_fixup+0x8d2/0xb30 [ 32.347388] do_mprotect_pkey+0x87e/0xd40 [ 32.347906] __x64_sys_mprotect+0x78/0xc0 [ 32.348424] do_syscall_64+0x3f/0x90 [ 32.348888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.349544] [ 32.349756] Freed by task 209: [ 32.350151] kasan_save_stack+0x22/0x50 [ 32.350680] kasan_set_track+0x25/0x30 [ 32.351170] kasan_save_free_info+0x2b/0x50 [ 32.351693] __kasan_slab_free+0x10a/0x190 [ 32.352214] kmem_cache_free+0x10d/0x4d0 [ 32.352713] rcu_core+0x8c8/0x2860 [ 32.353151] __do_softirq+0x1b7/0x7d4 [ 32.353638] [ 32.353850] Last potentially related work creation: [ 32.354447] kasan_save_stack+0x22/0x50 [ 32.355023] __kasan_record_aux_stack+0x8e/0xa0 [ 32.355617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.356276] remove_vma+0x139/0x170 [ 32.356738] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.357306] do_vmi_munmap+0x1f1/0x2b0 [ 32.357820] __vm_munmap+0x138/0x3a0 [ 32.358289] __x64_sys_munmap+0x59/0x80 [ 32.358800] do_syscall_64+0x3f/0x90 [ 32.359282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.359950] [ 32.360167] The buggy address belongs to the object at ffff88800ec2d3a0 [ 32.360167] which belongs to the cache vm_area_struct of size 168 [ 32.361657] The buggy address is located 88 bytes inside of [ 32.361657] freed 168-byte region [ffff88800ec2d3a0, ffff88800ec2d448) [ 32.363041] [ 32.363257] The buggy address belongs to the physical page: [ 32.363917] page:00000000e9cf3e5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec2d [ 32.365020] memcg:ffff88800feafb01 [ 32.365472] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.366131] page_type: 0xffffffff() [ 32.366590] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.367511] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800feafb01 [ 32.368436] page dumped because: kasan: bad access detected [ 32.369082] [ 32.369292] Memory state around the buggy address: [ 32.369881] ffff88800ec2d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.370718] ffff88800ec2d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.371555] >ffff88800ec2d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.372393] ^ [ 32.373220] ffff88800ec2d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.374103] ffff88800ec2d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.374972] ================================================================== [ 32.375926] Disabling lock debugging due to kernel taint [ 34.781486] BUG: Bad rss-counter state mm:00000000cbf47a56 type:MM_FILEPAGES val:33 [ 34.782508] BUG: Bad rss-counter state mm:00000000cbf47a56 type:MM_ANONPAGES val:22 [ 35.254408] BUG: Bad rss-counter state mm:00000000460099ee type:MM_FILEPAGES val:33 [ 35.255611] BUG: Bad rss-counter state mm:00000000460099ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23949' (ECDSA) to the list of known hosts. 2023/06/19 15:29:42 fuzzer started 2023/06/19 15:29:42 dialing manager at localhost:44161 2023/06/19 15:29:42 checking machine... 2023/06/19 15:29:42 checking revisions... [ 35.935420] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:29:42 testing simple program... [ 35.980604] cgroup: Unknown subsys name 'net' [ 36.029159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f70c0e6d660 CR3=000000000e9c2000 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=00000000000000000000000000000000 XMM01=7c57fe0598fe4ba66b405c43b369654f XMM02=ec2efd57dc4c00df0000000000120158 XMM03=2e88d9cf21abe2150000000000120228 XMM04=00d313d4f7ec253400000000000ae988 XMM05=dfcdbad4f1609c370000000000134518 XMM06=d51456066d754bbd0000000000133380 XMM07=e042d86d42eb936e0000000000124be8 XMM08=2e88d9cf21abe2150000000000120228 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000380 RCX=0000000000000000 RDX=1ffff11002cefa93 RSI=ffffffff838634fb RDI=ffff88801677d498 RBP=ffff88801677d3c0 RSP=ffff8880158c7ae8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000cc0 R13=000000000000012c R14=0000000000000258 R15=ffff88801677d3c0 RIP=ffffffff83863531 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 00007fa94775b900 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=00007fa947d12618 CR3=000000000e83c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000