syzkaller login: [ 30.676407] BUG: Bad rss-counter state mm:00000000f94b27d7 type:MM_FILEPAGES val:33 [ 30.677445] BUG: Bad rss-counter state mm:00000000f94b27d7 type:MM_ANONPAGES val:22 [ 30.839655] ================================================================== [ 30.840732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841848] Read of size 8 at addr ffff8880186316b0 by task sshd/221 [ 30.842903] [ 30.843157] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.844167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.845355] Call Trace: [ 30.845740] [ 30.846032] dump_stack_lvl+0x91/0xf0 [ 30.846516] print_report+0xcc/0x620 [ 30.847002] ? __virt_addr_valid+0x102/0x340 [ 30.847554] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848803] kasan_report+0xbe/0xf0 [ 30.849284] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849908] vma_interval_tree_remove+0xc75/0xec0 [ 30.850505] vma_prepare+0xc54/0x11a0 [ 30.850984] __split_vma+0x5af/0x950 [ 30.851458] ? __pfx___split_vma+0x10/0x10 [ 30.851989] ? find_held_lock+0x2c/0x110 [ 30.852508] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.853081] ? lock_is_held_type+0x9f/0x120 [ 30.853613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.854221] ? mtree_range_walk+0x632/0x900 [ 30.854769] ? mas_walk+0x5c7/0x7c0 [ 30.855254] do_vmi_munmap+0x1f1/0x2b0 [ 30.855740] mmap_region+0x1f9/0x2660 [ 30.856214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.856727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.857467] ? __pfx_lock_acquire+0x10/0x10 [ 30.858007] ? __pfx_mmap_region+0x10/0x10 [ 30.858538] ? security_mmap_addr+0x7d/0xa0 [ 30.859064] ? get_unmapped_area+0x1f5/0x3f0 [ 30.859614] do_mmap+0x854/0xf00 [ 30.860053] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.860541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.861111] ksys_mmap_pgoff+0x3af/0x500 [ 30.861617] do_syscall_64+0x3f/0x90 [ 30.862098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862742] RIP: 0033:0x7f63ac467d82 [ 30.863195] 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 [ 30.865319] RSP: 002b:00007ffdf3e8dfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.866216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63ac467d82 [ 30.867060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63ab8a1000 [ 30.867908] RBP: 00007f63ab8a1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.868747] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c67630dec0 [ 30.869603] R13: 00007ffdf3e8dfe0 R14: 00007ffdf3e8e010 R15: 00007ffdf3e8e370 [ 30.870454] [ 30.870746] [ 30.870966] Allocated by task 214: [ 30.871394] kasan_save_stack+0x22/0x50 [ 30.871901] kasan_set_track+0x25/0x30 [ 30.872394] __kasan_slab_alloc+0x59/0x70 [ 30.872911] kmem_cache_alloc+0x16b/0x370 [ 30.873438] vm_area_dup+0x20/0x160 [ 30.873893] __split_vma+0x170/0x950 [ 30.874359] split_vma+0xc6/0x110 [ 30.874793] mprotect_fixup+0x8d2/0xb30 [ 30.875290] do_mprotect_pkey+0x87e/0xd40 [ 30.875810] __x64_sys_mprotect+0x78/0xc0 [ 30.876327] do_syscall_64+0x3f/0x90 [ 30.876811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877462] [ 30.877675] Freed by task 214: [ 30.878068] kasan_save_stack+0x22/0x50 [ 30.878565] kasan_set_track+0x25/0x30 [ 30.879061] kasan_save_free_info+0x2b/0x50 [ 30.879595] __kasan_slab_free+0x10a/0x190 [ 30.880131] kmem_cache_free+0x10d/0x4d0 [ 30.880640] rcu_core+0x8c8/0x2860 [ 30.881098] __do_softirq+0x1b7/0x7d4 [ 30.881576] [ 30.881794] Last potentially related work creation: [ 30.882375] kasan_save_stack+0x22/0x50 [ 30.882887] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.884174] remove_vma+0x139/0x170 [ 30.884629] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885206] do_vmi_munmap+0x1f1/0x2b0 [ 30.885685] __vm_munmap+0x138/0x3a0 [ 30.886147] __x64_sys_munmap+0x59/0x80 [ 30.886642] do_syscall_64+0x3f/0x90 [ 30.887112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887746] [ 30.887963] The buggy address belongs to the object at ffff888018631658 [ 30.887963] which belongs to the cache vm_area_struct of size 168 [ 30.889447] The buggy address is located 88 bytes inside of [ 30.889447] freed 168-byte region [ffff888018631658, ffff888018631700) [ 30.890836] [ 30.891050] The buggy address belongs to the physical page: [ 30.891708] page:00000000dd91d771 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18631 [ 30.892796] memcg:ffff888016ecf701 [ 30.893248] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893884] page_type: 0xffffffff() [ 30.894331] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.895249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ecf701 [ 30.896156] page dumped because: kasan: bad access detected [ 30.896819] [ 30.897042] Memory state around the buggy address: [ 30.897621] ffff888018631580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.898468] ffff888018631600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.899323] >ffff888018631680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900178] ^ [ 30.900759] ffff888018631700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.901627] ffff888018631780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.902462] ================================================================== [ 30.903359] Disabling lock debugging due to kernel taint [ 33.656775] BUG: Bad rss-counter state mm:000000001b08a777 type:MM_FILEPAGES val:33 [ 33.658447] BUG: Bad rss-counter state mm:000000001b08a777 type:MM_ANONPAGES val:22 [ 34.112750] BUG: Bad rss-counter state mm:000000005992f045 type:MM_FILEPAGES val:33 [ 34.113840] BUG: Bad rss-counter state mm:000000005992f045 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42938' (ECDSA) to the list of known hosts. 2023/06/20 22:30:29 fuzzer started 2023/06/20 22:30:30 dialing manager at localhost:36067 2023/06/20 22:30:30 checking machine... 2023/06/20 22:30:30 checking revisions... [ 34.892979] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:30:30 testing simple program... [ 34.937980] cgroup: Unknown subsys name 'net' [ 34.980427] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009a77258 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801b837500 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000095000000950 R12=0000000000000000 R13=000000000000004b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1908 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 00007f2626734900 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=00007ffd6257f000 CR3=000000000fb82000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=ffffffff864bce01 RDX=1ffff1100d9e1359 RSI=0000000000000000 RDI=ffffffff8451349f RBP=ffff88806cf09ac8 RSP=ffff88806cf09a58 R8 =ffffffff864bce30 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800da35d80 RIP=ffffffff811303b2 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 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=00007fa3ac65dc50 CR3=000000000e108000 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=2039323a30333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000