syzkaller login: [ 30.286623] BUG: Bad rss-counter state mm:0000000006ea34e4 type:MM_FILEPAGES val:33 [ 30.287853] BUG: Bad rss-counter state mm:0000000006ea34e4 type:MM_ANONPAGES val:22 [ 30.378975] ================================================================== [ 30.379881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.380892] Read of size 8 at addr ffff88800fcd6d08 by task sshd/220 [ 30.381775] [ 30.382005] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.382893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.383889] Call Trace: [ 30.384210] [ 30.384515] dump_stack_lvl+0x91/0xf0 [ 30.385012] print_report+0xcc/0x620 [ 30.385494] ? __virt_addr_valid+0x102/0x340 [ 30.386046] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.386672] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.387289] kasan_report+0xbe/0xf0 [ 30.387765] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388390] vma_interval_tree_remove+0xc75/0xec0 [ 30.389001] vma_prepare+0xc54/0x11a0 [ 30.389485] __split_vma+0x5af/0x950 [ 30.389967] ? __pfx___split_vma+0x10/0x10 [ 30.390502] ? find_held_lock+0x2c/0x110 [ 30.391033] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.391604] ? lock_is_held_type+0x9f/0x120 [ 30.392151] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.392782] ? mtree_range_walk+0x632/0x900 [ 30.393347] ? mas_walk+0x5c7/0x7c0 [ 30.393829] do_vmi_munmap+0x1f1/0x2b0 [ 30.394318] mmap_region+0x1f9/0x2660 [ 30.394809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.395322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.396036] ? __pfx_lock_acquire+0x10/0x10 [ 30.396588] ? __pfx_mmap_region+0x10/0x10 [ 30.397129] ? security_mmap_addr+0x7d/0xa0 [ 30.397663] ? get_unmapped_area+0x1f5/0x3f0 [ 30.398225] do_mmap+0x854/0xf00 [ 30.398663] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.399158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.399718] ksys_mmap_pgoff+0x3af/0x500 [ 30.400228] do_syscall_64+0x3f/0x90 [ 30.400719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.401368] RIP: 0033:0x7f68bedd9d82 [ 30.401824] 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 [ 30.403981] RSP: 002b:00007ffdf89050c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.404904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68bedd9d82 [ 30.405746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68be213000 [ 30.406583] RBP: 00007f68be213000 R08: 0000000000000009 R09: 0000000000001000 [ 30.407416] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636b3e14ec0 [ 30.408250] R13: 00007ffdf89050e0 R14: 00007ffdf8905110 R15: 00007ffdf8905470 [ 30.409118] [ 30.409422] [ 30.409637] Allocated by task 213: [ 30.410062] kasan_save_stack+0x22/0x50 [ 30.410572] kasan_set_track+0x25/0x30 [ 30.411063] __kasan_slab_alloc+0x59/0x70 [ 30.411589] kmem_cache_alloc+0x16b/0x370 [ 30.412112] vm_area_dup+0x20/0x160 [ 30.412586] __split_vma+0x170/0x950 [ 30.413053] split_vma+0xc6/0x110 [ 30.413492] mprotect_fixup+0x8d2/0xb30 [ 30.413989] do_mprotect_pkey+0x87e/0xd40 [ 30.414513] __x64_sys_mprotect+0x78/0xc0 [ 30.415040] do_syscall_64+0x3f/0x90 [ 30.415517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416157] [ 30.416373] Freed by task 213: [ 30.416784] kasan_save_stack+0x22/0x50 [ 30.417286] kasan_set_track+0x25/0x30 [ 30.417783] kasan_save_free_info+0x2b/0x50 [ 30.418321] __kasan_slab_free+0x10a/0x190 [ 30.418853] kmem_cache_free+0x10d/0x4d0 [ 30.419357] rcu_core+0x8c8/0x2860 [ 30.419808] __do_softirq+0x1b7/0x7d4 [ 30.420295] [ 30.420520] Last potentially related work creation: [ 30.421129] kasan_save_stack+0x22/0x50 [ 30.421634] __kasan_record_aux_stack+0x8e/0xa0 [ 30.422215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.422851] remove_vma+0x139/0x170 [ 30.423315] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.423883] do_vmi_munmap+0x1f1/0x2b0 [ 30.424367] __vm_munmap+0x138/0x3a0 [ 30.424855] __x64_sys_munmap+0x59/0x80 [ 30.425365] do_syscall_64+0x3f/0x90 [ 30.425850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.426495] [ 30.426708] The buggy address belongs to the object at ffff88800fcd6cb0 [ 30.426708] which belongs to the cache vm_area_struct of size 168 [ 30.428173] The buggy address is located 88 bytes inside of [ 30.428173] freed 168-byte region [ffff88800fcd6cb0, ffff88800fcd6d58) [ 30.429597] [ 30.429812] The buggy address belongs to the physical page: [ 30.430472] page:000000007677d57d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcd6 [ 30.431561] memcg:ffff88800c9a3f01 [ 30.431981] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.432647] page_type: 0xffffffff() [ 30.433112] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.434024] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9a3f01 [ 30.434935] page dumped because: kasan: bad access detected [ 30.435597] [ 30.435817] Memory state around the buggy address: [ 30.436402] ffff88800fcd6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.437265] ffff88800fcd6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.438142] >ffff88800fcd6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.438996] ^ [ 30.439438] ffff88800fcd6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440283] ffff88800fcd6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.441142] ================================================================== [ 30.442279] Disabling lock debugging due to kernel taint [ 32.056567] BUG: Bad rss-counter state mm:00000000ff70260a type:MM_FILEPAGES val:33 [ 32.057326] BUG: Bad rss-counter state mm:00000000ff70260a type:MM_ANONPAGES val:22 [ 32.435372] BUG: Bad rss-counter state mm:000000006da8547f type:MM_FILEPAGES val:33 [ 32.436781] BUG: Bad rss-counter state mm:000000006da8547f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2731' (ECDSA) to the list of known hosts. 2023/06/21 07:53:31 fuzzer started 2023/06/21 07:53:31 dialing manager at localhost:36067 2023/06/21 07:53:31 checking machine... 2023/06/21 07:53:31 checking revisions... [ 33.037421] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:53:31 testing simple program... [ 33.087336] cgroup: Unknown subsys name 'net' [ 33.147035] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=1ffff11002fd0f27 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888017e87990 RSP=ffff888017e878c8 R8 =ffffffff86138e90 R9 =ffff888017e87978 R10=0000000000038001 R11=0000000000020d8f R12=ffff888017e87998 R13=ffff888017e87980 R14=ffff888017e87c88 R15=ffff888017e87938 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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 00007f24f5e97900 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=00007f24f644e618 CR3=000000000dcc6000 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=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 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=0000000000000001 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=00007f8dd1996000 CR3=000000000c7bc000 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=ead314df53877b9fe441ed500ca231c5 XMM02=000000000011a540eff9b2d0a8fce9cb XMM03=000000000011a6102c67c8bc2e329bc3 XMM04=ddfe87b4ba558f2c00000000000ae988 XMM05=a602f8e361a7211700000000001327d0 XMM06=4fda316b135da52b0000000000131870 XMM07=e042d86d42eb936e0000000000121ad8 XMM08=9a39833f8acba2a8000000000011a610 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000