syzkaller login: [ 30.676027] BUG: Bad rss-counter state mm:00000000437f7bc4 type:MM_FILEPAGES val:33 [ 30.677471] BUG: Bad rss-counter state mm:00000000437f7bc4 type:MM_ANONPAGES val:22 [ 30.839273] ================================================================== [ 30.840386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841693] Read of size 8 at addr ffff8880166d6798 by task sshd/219 [ 30.842601] [ 30.842866] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844974] Call Trace: [ 30.845296] [ 30.845578] dump_stack_lvl+0x91/0xf0 [ 30.846075] print_report+0xcc/0x620 [ 30.846571] ? __virt_addr_valid+0x102/0x340 [ 30.847121] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847753] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848377] kasan_report+0xbe/0xf0 [ 30.848852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849470] vma_interval_tree_remove+0xc75/0xec0 [ 30.850073] vma_prepare+0xc54/0x11a0 [ 30.850555] __split_vma+0x5af/0x950 [ 30.851026] ? __pfx___split_vma+0x10/0x10 [ 30.851546] ? find_held_lock+0x2c/0x110 [ 30.852079] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852647] ? lock_is_held_type+0x9f/0x120 [ 30.853184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853797] ? mtree_range_walk+0x632/0x900 [ 30.854351] ? mas_walk+0x5c7/0x7c0 [ 30.854822] do_vmi_munmap+0x1f1/0x2b0 [ 30.855310] mmap_region+0x1f9/0x2660 [ 30.855810] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.856322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.857037] ? __pfx_lock_acquire+0x10/0x10 [ 30.857567] ? __pfx_mmap_region+0x10/0x10 [ 30.858093] ? security_mmap_addr+0x7d/0xa0 [ 30.858620] ? get_unmapped_area+0x1f5/0x3f0 [ 30.859169] do_mmap+0x854/0xf00 [ 30.859609] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.860110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860664] ksys_mmap_pgoff+0x3af/0x500 [ 30.861177] do_syscall_64+0x3f/0x90 [ 30.861649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862292] RIP: 0033:0x7fcec25e7d82 [ 30.862750] 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 [ 30.864869] RSP: 002b:00007ffd0d4da198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.865770] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcec25e7d82 [ 30.866613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcec1a21000 [ 30.867455] RBP: 00007fcec1a21000 R08: 0000000000000009 R09: 0000000000001000 [ 30.868315] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5800a7ec0 [ 30.869157] R13: 00007ffd0d4da1b0 R14: 00007ffd0d4da1e0 R15: 00007ffd0d4da540 [ 30.870015] [ 30.870312] [ 30.870525] Allocated by task 212: [ 30.870954] kasan_save_stack+0x22/0x50 [ 30.871453] kasan_set_track+0x25/0x30 [ 30.871963] __kasan_slab_alloc+0x59/0x70 [ 30.872480] kmem_cache_alloc+0x16b/0x370 [ 30.872993] vm_area_dup+0x20/0x160 [ 30.873441] __split_vma+0x170/0x950 [ 30.873904] split_vma+0xc6/0x110 [ 30.874341] mprotect_fixup+0x8d2/0xb30 [ 30.874838] do_mprotect_pkey+0x87e/0xd40 [ 30.875352] __x64_sys_mprotect+0x78/0xc0 [ 30.875895] do_syscall_64+0x3f/0x90 [ 30.876368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877014] [ 30.877230] Freed by task 209: [ 30.877624] kasan_save_stack+0x22/0x50 [ 30.878130] kasan_set_track+0x25/0x30 [ 30.878630] kasan_save_free_info+0x2b/0x50 [ 30.879175] __kasan_slab_free+0x10a/0x190 [ 30.879720] kmem_cache_free+0x10d/0x4d0 [ 30.880235] rcu_core+0x8c8/0x2860 [ 30.880684] __do_softirq+0x1b7/0x7d4 [ 30.881175] [ 30.881394] Last potentially related work creation: [ 30.881984] kasan_save_stack+0x22/0x50 [ 30.882493] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883707] remove_vma+0x139/0x170 [ 30.884153] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884711] do_vmi_munmap+0x1f1/0x2b0 [ 30.885202] __vm_munmap+0x138/0x3a0 [ 30.885670] __x64_sys_munmap+0x59/0x80 [ 30.886202] do_syscall_64+0x3f/0x90 [ 30.886716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887361] [ 30.887573] The buggy address belongs to the object at ffff8880166d6740 [ 30.887573] which belongs to the cache vm_area_struct of size 168 [ 30.889036] The buggy address is located 88 bytes inside of [ 30.889036] freed 168-byte region [ffff8880166d6740, ffff8880166d67e8) [ 30.890429] [ 30.890641] The buggy address belongs to the physical page: [ 30.891297] page:000000001d83b10f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166d6 [ 30.892395] memcg:ffff88800953d101 [ 30.892817] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893454] page_type: 0xffffffff() [ 30.893898] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.894801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800953d101 [ 30.895718] page dumped because: kasan: bad access detected [ 30.896367] [ 30.896584] Memory state around the buggy address: [ 30.897160] ffff8880166d6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.898006] ffff8880166d6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.898849] >ffff8880166d6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.899706] ^ [ 30.900202] ffff8880166d6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.901055] ffff8880166d6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.901906] ================================================================== [ 30.902852] Disabling lock debugging due to kernel taint [ 33.197886] BUG: Bad rss-counter state mm:000000008aa8f721 type:MM_FILEPAGES val:33 [ 33.199337] BUG: Bad rss-counter state mm:000000008aa8f721 type:MM_ANONPAGES val:22 [ 33.664139] BUG: Bad rss-counter state mm:000000000c7b3568 type:MM_FILEPAGES val:33 [ 33.665148] BUG: Bad rss-counter state mm:000000000c7b3568 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51832' (ECDSA) to the list of known hosts. 2023/06/20 21:35:07 fuzzer started 2023/06/20 21:35:07 dialing manager at localhost:36067 2023/06/20 21:35:07 checking machine... 2023/06/20 21:35:07 checking revisions... [ 34.289964] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:35:08 testing simple program... [ 34.343349] cgroup: Unknown subsys name 'net' [ 34.391830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8140686b RDX=ffff888015d61b40 RSI=0000000000000000 RDI=0000000000000005 RBP=1ffff110033b9fb8 RSP=ffff888019dcfda0 R8 =0000000000000005 R9 =000000000000000d R10=0000000000000000 R11=0000000000000000 R12=000055dac41f8e94 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c04c1 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 00007f002deac700 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=00007fe4e96fc0b0 CR3=0000000014702000 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=2037303a35333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35333a3132203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f8f2eb9e270 CR3=000000000d64c000 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=9d650bb0c9d9f3a8bf4aa7c34313938d XMM02=000000000011d328ec2efd57dc4c00df XMM03=000000000012172021ef77e901124279 XMM04=bf2f0ea091438bca00000000000ae988 XMM05=dfcdbad4f1609c370000000000131818 XMM06=806171799158d96700000000001316a0 XMM07=e042d86d42eb936e00000000001219a0 XMM08=21ef77e901124279000000000011d388 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000