syzkaller login: [ 30.500790] BUG: Bad rss-counter state mm:00000000994769aa type:MM_FILEPAGES val:33 [ 30.501812] BUG: Bad rss-counter state mm:00000000994769aa type:MM_ANONPAGES val:22 [ 30.632065] ================================================================== [ 30.632790] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.633497] Read of size 8 at addr ffff88800dbec228 by task sshd/222 [ 30.634030] [ 30.634163] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.634698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.635377] Call Trace: [ 30.635589] [ 30.635789] dump_stack_lvl+0x91/0xf0 [ 30.636462] print_report+0xcc/0x620 [ 30.636864] ? __virt_addr_valid+0x102/0x340 [ 30.637250] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.637669] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638082] kasan_report+0xbe/0xf0 [ 30.638379] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638814] vma_interval_tree_remove+0xc75/0xec0 [ 30.639191] vma_prepare+0xc54/0x11a0 [ 30.639529] __split_vma+0x5af/0x950 [ 30.639835] ? __pfx___split_vma+0x10/0x10 [ 30.640269] ? find_held_lock+0x2c/0x110 [ 30.640641] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.641032] ? lock_is_held_type+0x9f/0x120 [ 30.641396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.641815] ? mtree_range_walk+0x632/0x900 [ 30.642199] ? mas_walk+0x5c7/0x7c0 [ 30.642530] do_vmi_munmap+0x1f1/0x2b0 [ 30.642864] mmap_region+0x1f9/0x2660 [ 30.643194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.643550] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.644099] ? __pfx_lock_acquire+0x10/0x10 [ 30.644472] ? __pfx_mmap_region+0x10/0x10 [ 30.644840] ? security_mmap_addr+0x7d/0xa0 [ 30.645219] ? get_unmapped_area+0x1f5/0x3f0 [ 30.645610] do_mmap+0x854/0xf00 [ 30.645922] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.646264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.646650] ksys_mmap_pgoff+0x3af/0x500 [ 30.647017] do_syscall_64+0x3f/0x90 [ 30.647341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.647766] RIP: 0033:0x7faa15737d82 [ 30.648103] 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 [ 30.649544] RSP: 002b:00007fff369cd3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.650154] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa15737d82 [ 30.650749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa14b71000 [ 30.651340] RBP: 00007faa14b71000 R08: 0000000000000009 R09: 0000000000001000 [ 30.651913] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d118952f70 [ 30.652556] R13: 00007fff369cd3d0 R14: 00007fff369cd400 R15: 00007fff369cd760 [ 30.653124] [ 30.653306] [ 30.653444] Allocated by task 215: [ 30.653718] kasan_save_stack+0x22/0x50 [ 30.654050] kasan_set_track+0x25/0x30 [ 30.654380] __kasan_slab_alloc+0x59/0x70 [ 30.654736] kmem_cache_alloc+0x16b/0x370 [ 30.655079] vm_area_dup+0x20/0x160 [ 30.655378] __split_vma+0x170/0x950 [ 30.655693] split_vma+0xc6/0x110 [ 30.656020] mprotect_fixup+0x8d2/0xb30 [ 30.656360] do_mprotect_pkey+0x87e/0xd40 [ 30.656706] __x64_sys_mprotect+0x78/0xc0 [ 30.657061] do_syscall_64+0x3f/0x90 [ 30.657379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657839] [ 30.657987] Freed by task 215: [ 30.658253] kasan_save_stack+0x22/0x50 [ 30.658599] kasan_set_track+0x25/0x30 [ 30.658940] kasan_save_free_info+0x2b/0x50 [ 30.659307] __kasan_slab_free+0x10a/0x190 [ 30.659662] kmem_cache_free+0x10d/0x4d0 [ 30.660074] rcu_core+0x8c8/0x2860 [ 30.660358] __do_softirq+0x1b7/0x7d4 [ 30.660666] [ 30.660820] Last potentially related work creation: [ 30.661199] kasan_save_stack+0x22/0x50 [ 30.661515] __kasan_record_aux_stack+0x8e/0xa0 [ 30.661879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.662298] remove_vma+0x139/0x170 [ 30.662602] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.662977] do_vmi_munmap+0x1f1/0x2b0 [ 30.663296] __vm_munmap+0x138/0x3a0 [ 30.663590] __x64_sys_munmap+0x59/0x80 [ 30.663905] do_syscall_64+0x3f/0x90 [ 30.664241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664676] [ 30.664823] The buggy address belongs to the object at ffff88800dbec1d0 [ 30.664823] which belongs to the cache vm_area_struct of size 168 [ 30.665819] The buggy address is located 88 bytes inside of [ 30.665819] freed 168-byte region [ffff88800dbec1d0, ffff88800dbec278) [ 30.666753] [ 30.666895] The buggy address belongs to the physical page: [ 30.667321] page:00000000070c888a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbec [ 30.668047] memcg:ffff888019d40601 [ 30.668326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.668764] page_type: 0xffffffff() [ 30.669069] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.669661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d40601 [ 30.670249] page dumped because: kasan: bad access detected [ 30.670698] [ 30.670845] Memory state around the buggy address: [ 30.671252] ffff88800dbec100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.671871] ffff88800dbec180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.672520] >ffff88800dbec200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.673108] ^ [ 30.673486] ffff88800dbec280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.674051] ffff88800dbec300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.674625] ================================================================== [ 30.675285] Disabling lock debugging due to kernel taint [ 32.081772] BUG: Bad rss-counter state mm:00000000f81a288c type:MM_FILEPAGES val:33 [ 32.082450] BUG: Bad rss-counter state mm:00000000f81a288c type:MM_ANONPAGES val:22 [ 32.457785] BUG: Bad rss-counter state mm:000000009a18cbfa type:MM_FILEPAGES val:33 [ 32.458474] BUG: Bad rss-counter state mm:000000009a18cbfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18087' (ECDSA) to the list of known hosts. 2023/06/21 09:20:57 fuzzer started 2023/06/21 09:20:57 dialing manager at localhost:36067 2023/06/21 09:20:57 checking machine... 2023/06/21 09:20:57 checking revisions... [ 33.014590] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:20:57 testing simple program... [ 33.049476] cgroup: Unknown subsys name 'net' [ 33.107469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09f80 R15=ffff88806ce09a98 RIP=ffffffff81130bb0 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 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=00007f76cc4112d8 CR3=000000000cbe8000 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=0cfbcf53267725bd2545b228aaa5a452 XMM02=ec2efd57dc4c00df000000000011ac98 XMM03=5eeef104ef5f1b79000000000011ad68 XMM04=c16faaef346e93fa00000000000ae988 XMM05=59d5b690e0af863b0000000000131f38 XMM06=c8d8e6214c563d120000000000130da0 XMM07=e042d86d42eb936e00000000001223f0 XMM08=5eeef104ef5f1b79000000000011ad68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff888019ca7978 R8 =ffffffff860d8256 R9 =ffff888019ca7a70 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007ff41e56b900 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=00007ffc63fba000 CR3=00000000099c8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000