syzkaller login: [ 30.676464] BUG: Bad rss-counter state mm:000000001d344b68 type:MM_FILEPAGES val:33 [ 30.677770] BUG: Bad rss-counter state mm:000000001d344b68 type:MM_ANONPAGES val:22 [ 30.854388] ================================================================== [ 30.855467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856602] Read of size 8 at addr ffff888015b3ba50 by task sshd/220 [ 30.857686] [ 30.857948] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860202] Call Trace: [ 30.860579] [ 30.860877] dump_stack_lvl+0x91/0xf0 [ 30.861393] print_report+0xcc/0x620 [ 30.861913] ? __virt_addr_valid+0x102/0x340 [ 30.862499] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863819] kasan_report+0xbe/0xf0 [ 30.864342] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865017] vma_interval_tree_remove+0xc75/0xec0 [ 30.865660] vma_prepare+0xc54/0x11a0 [ 30.866182] __split_vma+0x5af/0x950 [ 30.866694] ? __pfx___split_vma+0x10/0x10 [ 30.867269] ? find_held_lock+0x2c/0x110 [ 30.867830] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.868460] ? lock_is_held_type+0x9f/0x120 [ 30.869047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.869694] ? mtree_range_walk+0x632/0x900 [ 30.870295] ? mas_walk+0x5c7/0x7c0 [ 30.870808] do_vmi_munmap+0x1f1/0x2b0 [ 30.871345] mmap_region+0x1f9/0x2660 [ 30.871864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.872423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.873192] ? __pfx_lock_acquire+0x10/0x10 [ 30.873764] ? __pfx_mmap_region+0x10/0x10 [ 30.874327] ? security_mmap_addr+0x7d/0xa0 [ 30.874898] ? get_unmapped_area+0x1f5/0x3f0 [ 30.875490] do_mmap+0x854/0xf00 [ 30.875962] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.876515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877120] ksys_mmap_pgoff+0x3af/0x500 [ 30.877702] do_syscall_64+0x3f/0x90 [ 30.878220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878920] RIP: 0033:0x7ff546e31d82 [ 30.879413] 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 [ 30.881717] RSP: 002b:00007ffcf2270778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.882701] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff546e31d82 [ 30.883615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff54626b000 [ 30.884538] RBP: 00007ff54626b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.885453] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd42994ec0 [ 30.886369] R13: 00007ffcf2270790 R14: 00007ffcf22707c0 R15: 00007ffcf2270b20 [ 30.887298] [ 30.887614] [ 30.887850] Allocated by task 213: [ 30.888330] kasan_save_stack+0x22/0x50 [ 30.888869] kasan_set_track+0x25/0x30 [ 30.889401] __kasan_slab_alloc+0x59/0x70 [ 30.889962] kmem_cache_alloc+0x16b/0x370 [ 30.890511] vm_area_dup+0x20/0x160 [ 30.891004] __split_vma+0x170/0x950 [ 30.891501] split_vma+0xc6/0x110 [ 30.891968] mprotect_fixup+0x8d2/0xb30 [ 30.892525] do_mprotect_pkey+0x87e/0xd40 [ 30.893093] __x64_sys_mprotect+0x78/0xc0 [ 30.893652] do_syscall_64+0x3f/0x90 [ 30.894168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894861] [ 30.895093] Freed by task 13: [ 30.895506] kasan_save_stack+0x22/0x50 [ 30.896067] kasan_set_track+0x25/0x30 [ 30.896606] kasan_save_free_info+0x2b/0x50 [ 30.897183] __kasan_slab_free+0x10a/0x190 [ 30.897759] kmem_cache_free+0x10d/0x4d0 [ 30.898355] rcu_core+0x8c8/0x2860 [ 30.898843] __do_softirq+0x1b7/0x7d4 [ 30.899361] [ 30.899592] Last potentially related work creation: [ 30.900239] kasan_save_stack+0x22/0x50 [ 30.900788] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.902111] remove_vma+0x139/0x170 [ 30.902597] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.903201] do_vmi_munmap+0x1f1/0x2b0 [ 30.903727] __vm_munmap+0x138/0x3a0 [ 30.904240] __x64_sys_munmap+0x59/0x80 [ 30.904788] do_syscall_64+0x3f/0x90 [ 30.905306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906003] [ 30.906236] The buggy address belongs to the object at ffff888015b3b9f8 [ 30.906236] which belongs to the cache vm_area_struct of size 168 [ 30.907835] The buggy address is located 88 bytes inside of [ 30.907835] freed 168-byte region [ffff888015b3b9f8, ffff888015b3baa0) [ 30.909382] [ 30.909612] The buggy address belongs to the physical page: [ 30.910329] page:000000006c61bd7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b3b [ 30.911508] memcg:ffff88800eafe401 [ 30.911969] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.912675] page_type: 0xffffffff() [ 30.913163] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.914145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eafe401 [ 30.915114] page dumped because: kasan: bad access detected [ 30.915814] [ 30.916049] Memory state around the buggy address: [ 30.916678] ffff888015b3b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.917593] ffff888015b3b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.918506] >ffff888015b3ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.919414] ^ [ 30.920181] ffff888015b3ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.921088] ffff888015b3bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.921999] ================================================================== [ 30.922995] Disabling lock debugging due to kernel taint [ 33.820623] BUG: Bad rss-counter state mm:00000000ec992c2b type:MM_FILEPAGES val:33 [ 33.821678] BUG: Bad rss-counter state mm:00000000ec992c2b type:MM_ANONPAGES val:22 [ 34.302574] BUG: Bad rss-counter state mm:00000000db7728cf type:MM_FILEPAGES val:33 [ 34.303760] BUG: Bad rss-counter state mm:00000000db7728cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52977' (ECDSA) to the list of known hosts. 2023/06/21 10:15:42 fuzzer started 2023/06/21 10:15:42 dialing manager at localhost:36067 2023/06/21 10:15:42 checking machine... 2023/06/21 10:15:42 checking revisions... [ 34.992309] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:15:43 testing simple program... [ 35.035812] cgroup: Unknown subsys name 'net' [ 35.099132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:15:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055a498c84300 RCX=00007ffd1024f148 RDX=0000000000000001 RSI=00007ffd1024f133 RDI=00007ffd1024f132 RBP=00007ffd1024f0b0 RSP=00007ffd1024ef70 R8 =000055a498c64ce0 R9 =00000000ffffffff R10=000055a498c5eeb0 R11=0000000000000000 R12=0000000000000000 R13=00007ffd1024f6a0 R14=000055a498c843f0 R15=00007ffd1024f750 RIP=00007f537eb93f62 RFL=00010246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f537e686900 00000000 00000000 GS =0000 0000000000000000 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=00007f537ec3d618 CR3=000000001ca2c000 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=0000000008bc227c RBX=00007ffe807c88b0 RCX=00000000ac2442f1 RDX=000000007b76f8d5 RSI=0000000000000001 RDI=00007ffe807c88c8 RBP=0000564214332290 RSP=00007ffe807c8520 R8 =00007ffe807c8530 R9 =00007ffe807c8534 R10=00000000e90de57c R11=000000000052545f R12=0000000000000019 R13=292475202af52d73 R14=00007ffe807c86e8 R15=00007ffe807c8570 RIP=00007f7fbf6ea80f RFL=00000282 [--S----] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7fbeb59900 00000000 00000000 GS =0000 0000000000000000 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=00007f7fbe077000 CR3=000000000f424000 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=ffffffffffffffffffffffffffffffff XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7da080daab62d32000000000000ae988 XMM05=9a78cdb461401ce80000000000132e08 XMM06=080188f5fc7caa000000000000131ba8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000