syzkaller login: [ 30.387116] BUG: Bad rss-counter state mm:00000000f01e74d1 type:MM_FILEPAGES val:33 [ 30.388504] BUG: Bad rss-counter state mm:00000000f01e74d1 type:MM_ANONPAGES val:22 [ 30.560860] ================================================================== [ 30.562042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.563491] Read of size 8 at addr ffff88800e51d798 by task sshd/219 [ 30.564483] [ 30.564757] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.565583] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.566326] Call Trace: [ 30.566564] [ 30.566791] dump_stack_lvl+0x91/0xf0 [ 30.567175] print_report+0xcc/0x620 [ 30.567544] ? __virt_addr_valid+0x102/0x340 [ 30.567947] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.568416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.568879] kasan_report+0xbe/0xf0 [ 30.569228] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569681] vma_interval_tree_remove+0xc75/0xec0 [ 30.570126] vma_prepare+0xc54/0x11a0 [ 30.570489] __split_vma+0x5af/0x950 [ 30.570849] ? __pfx___split_vma+0x10/0x10 [ 30.571237] ? find_held_lock+0x2c/0x110 [ 30.571632] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.572066] ? lock_is_held_type+0x9f/0x120 [ 30.572463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.572932] ? mtree_range_walk+0x632/0x900 [ 30.573351] ? mas_walk+0x5c7/0x7c0 [ 30.573706] do_vmi_munmap+0x1f1/0x2b0 [ 30.574070] mmap_region+0x1f9/0x2660 [ 30.574423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.575376] ? __pfx_lock_acquire+0x10/0x10 [ 30.575774] ? __pfx_mmap_region+0x10/0x10 [ 30.576182] ? security_mmap_addr+0x7d/0xa0 [ 30.576571] ? get_unmapped_area+0x1f5/0x3f0 [ 30.576976] do_mmap+0x854/0xf00 [ 30.577292] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.577667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.578076] ksys_mmap_pgoff+0x3af/0x500 [ 30.578455] do_syscall_64+0x3f/0x90 [ 30.578820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.579273] RIP: 0033:0x7f2e7102bd82 [ 30.579606] 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 [ 30.581263] RSP: 002b:00007fffb32aa238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.581914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e7102bd82 [ 30.582551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e70465000 [ 30.583506] RBP: 00007f2e70465000 R08: 0000000000000009 R09: 0000000000001000 [ 30.584466] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebc19f0ec0 [ 30.585420] R13: 00007fffb32aa250 R14: 00007fffb32aa280 R15: 00007fffb32aa5e0 [ 30.586389] [ 30.586741] [ 30.586983] Allocated by task 212: [ 30.587460] kasan_save_stack+0x22/0x50 [ 30.588053] kasan_set_track+0x25/0x30 [ 30.588620] __kasan_slab_alloc+0x59/0x70 [ 30.589178] kmem_cache_alloc+0x16b/0x370 [ 30.589725] vm_area_dup+0x20/0x160 [ 30.590214] __split_vma+0x170/0x950 [ 30.590720] split_vma+0xc6/0x110 [ 30.591192] mprotect_fixup+0x8d2/0xb30 [ 30.591721] do_mprotect_pkey+0x87e/0xd40 [ 30.592271] __x64_sys_mprotect+0x78/0xc0 [ 30.592822] do_syscall_64+0x3f/0x90 [ 30.593333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594021] [ 30.594255] Freed by task 212: [ 30.594687] kasan_save_stack+0x22/0x50 [ 30.595219] kasan_set_track+0x25/0x30 [ 30.595749] kasan_save_free_info+0x2b/0x50 [ 30.596312] __kasan_slab_free+0x10a/0x190 [ 30.596899] kmem_cache_free+0x10d/0x4d0 [ 30.597463] rcu_core+0x8c8/0x2860 [ 30.597953] __do_softirq+0x1b7/0x7d4 [ 30.598483] [ 30.598919] Last potentially related work creation: [ 30.599659] kasan_save_stack+0x22/0x50 [ 30.600297] __kasan_record_aux_stack+0x8e/0xa0 [ 30.601014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.601826] remove_vma+0x139/0x170 [ 30.602387] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.603125] do_vmi_munmap+0x1f1/0x2b0 [ 30.603739] __vm_munmap+0x138/0x3a0 [ 30.604303] __x64_sys_munmap+0x59/0x80 [ 30.605048] do_syscall_64+0x3f/0x90 [ 30.605640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606442] [ 30.606716] The buggy address belongs to the object at ffff88800e51d740 [ 30.606716] which belongs to the cache vm_area_struct of size 168 [ 30.608546] The buggy address is located 88 bytes inside of [ 30.608546] freed 168-byte region [ffff88800e51d740, ffff88800e51d7e8) [ 30.610309] [ 30.610578] The buggy address belongs to the physical page: [ 30.611421] page:00000000701e3193 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe51d [ 30.612867] memcg:ffff88800ca6c401 [ 30.613400] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.614213] page_type: 0xffffffff() [ 30.614806] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a4840 dead000000000004 [ 30.615862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca6c401 [ 30.616884] page dumped because: kasan: bad access detected [ 30.617610] [ 30.617849] Memory state around the buggy address: [ 30.618489] ffff88800e51d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.619440] ffff88800e51d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.620393] >ffff88800e51d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.621333] ^ [ 30.621879] ffff88800e51d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.622833] ffff88800e51d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.623772] ================================================================== [ 30.624873] Disabling lock debugging due to kernel taint [ 33.304240] BUG: Bad rss-counter state mm:00000000249596b0 type:MM_FILEPAGES val:33 [ 33.305234] BUG: Bad rss-counter state mm:00000000249596b0 type:MM_ANONPAGES val:22 [ 33.702035] BUG: Bad rss-counter state mm:0000000000fec1bf type:MM_FILEPAGES val:33 [ 33.703178] BUG: Bad rss-counter state mm:0000000000fec1bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2001' (ECDSA) to the list of known hosts. 2023/06/21 03:05:17 fuzzer started 2023/06/21 03:05:17 dialing manager at localhost:36067 2023/06/21 03:05:17 checking machine... 2023/06/21 03:05:17 checking revisions... [ 34.426478] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:05:18 testing simple program... [ 34.480257] cgroup: Unknown subsys name 'net' [ 34.529970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:05:17 Registers: info registers vcpu 0 RAX=ffff888015e09b40 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84511f81 RBP=ffff88801caa7f58 RSP=ffff88801caa7f28 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000033 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84511f8b 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 00007f882ba63900 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=00007f882c01a618 CR3=000000001c982000 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=00007f2ab6ab14e0 CR3=000000000c602000 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=d4d5b2fd4ec36da164433a33973fe8f6 XMM02=ec2efd57dc4c00df000000000011c9e0 XMM03=d0bb6bff21bc181a000000000011cab0 XMM04=c25080e39c09aa7900000000000ae988 XMM05=65bea5e8944c87f50000000000131548 XMM06=806171799158d9670000000000130f40 XMM07=e042d86d42eb936e0000000000121470 XMM08=d0bb6bff21bc181a000000000011cab0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000