syzkaller login: [ 39.325923] BUG: Bad rss-counter state mm:00000000366ab2d6 type:MM_FILEPAGES val:33 [ 39.327244] BUG: Bad rss-counter state mm:00000000366ab2d6 type:MM_ANONPAGES val:22 [ 39.495045] ================================================================== [ 39.495956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.496890] Read of size 8 at addr ffff88800d880a50 by task sshd/220 [ 39.497762] [ 39.497978] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.498826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.499807] Call Trace: [ 39.500130] [ 39.500415] dump_stack_lvl+0x91/0xf0 [ 39.500902] print_report+0xcc/0x620 [ 39.501383] ? __virt_addr_valid+0x102/0x340 [ 39.501966] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.502584] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.503207] kasan_report+0xbe/0xf0 [ 39.503694] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.504314] vma_interval_tree_remove+0xc75/0xec0 [ 39.504938] vma_prepare+0xc54/0x11a0 [ 39.505443] __split_vma+0x5af/0x950 [ 39.505946] ? __pfx___split_vma+0x10/0x10 [ 39.506494] ? find_held_lock+0x2c/0x110 [ 39.507026] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.507609] ? lock_is_held_type+0x9f/0x120 [ 39.508178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.508816] ? mtree_range_walk+0x632/0x900 [ 39.509390] ? mas_walk+0x5c7/0x7c0 [ 39.509893] do_vmi_munmap+0x1f1/0x2b0 [ 39.510403] mmap_region+0x1f9/0x2660 [ 39.510901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.511435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.512173] ? __pfx_lock_acquire+0x10/0x10 [ 39.512728] ? __pfx_mmap_region+0x10/0x10 [ 39.513282] ? security_mmap_addr+0x7d/0xa0 [ 39.513850] ? get_unmapped_area+0x1f5/0x3f0 [ 39.514419] do_mmap+0x854/0xf00 [ 39.514873] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.515381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.515969] ksys_mmap_pgoff+0x3af/0x500 [ 39.516495] do_syscall_64+0x3f/0x90 [ 39.516983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.517653] RIP: 0033:0x7f35c5498d82 [ 39.518125] 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 [ 39.520342] RSP: 002b:00007ffea3646728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.521288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35c5498d82 [ 39.522184] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35c48d2000 [ 39.523064] RBP: 00007f35c48d2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.523945] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa1fa9cec0 [ 39.524826] R13: 00007ffea3646740 R14: 00007ffea3646770 R15: 00007ffea3646ad0 [ 39.525733] [ 39.526039] [ 39.526261] Allocated by task 213: [ 39.526702] kasan_save_stack+0x22/0x50 [ 39.527221] kasan_set_track+0x25/0x30 [ 39.527733] __kasan_slab_alloc+0x59/0x70 [ 39.528291] kmem_cache_alloc+0x16b/0x370 [ 39.528822] vm_area_dup+0x20/0x160 [ 39.529294] __split_vma+0x170/0x950 [ 39.529782] split_vma+0xc6/0x110 [ 39.530234] mprotect_fixup+0x8d2/0xb30 [ 39.530747] do_mprotect_pkey+0x87e/0xd40 [ 39.531287] __x64_sys_mprotect+0x78/0xc0 [ 39.531824] do_syscall_64+0x3f/0x90 [ 39.532310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.532975] [ 39.533194] Freed by task 213: [ 39.533612] kasan_save_stack+0x22/0x50 [ 39.534145] kasan_set_track+0x25/0x30 [ 39.534660] kasan_save_free_info+0x2b/0x50 [ 39.535218] __kasan_slab_free+0x10a/0x190 [ 39.535771] kmem_cache_free+0x10d/0x4d0 [ 39.536298] rcu_core+0x8c8/0x2860 [ 39.536757] __do_softirq+0x1b7/0x7d4 [ 39.537256] [ 39.537481] Last potentially related work creation: [ 39.538105] kasan_save_stack+0x22/0x50 [ 39.538639] __kasan_record_aux_stack+0x8e/0xa0 [ 39.539238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.539913] remove_vma+0x139/0x170 [ 39.540378] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.540951] do_vmi_munmap+0x1f1/0x2b0 [ 39.541461] __vm_munmap+0x138/0x3a0 [ 39.541969] __x64_sys_munmap+0x59/0x80 [ 39.542493] do_syscall_64+0x3f/0x90 [ 39.542981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.543641] [ 39.543869] Second to last potentially related work creation: [ 39.544587] kasan_save_stack+0x22/0x50 [ 39.545103] __kasan_record_aux_stack+0x8e/0xa0 [ 39.545711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.546380] remove_vma+0x139/0x170 [ 39.546847] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.547422] do_vmi_munmap+0x1f1/0x2b0 [ 39.547927] mmap_region+0x1f9/0x2660 [ 39.548422] do_mmap+0x854/0xf00 [ 39.548870] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.549369] ksys_mmap_pgoff+0x3af/0x500 [ 39.549899] do_syscall_64+0x3f/0x90 [ 39.550394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.551058] [ 39.551276] The buggy address belongs to the object at ffff88800d8809f8 [ 39.551276] which belongs to the cache vm_area_struct of size 168 [ 39.552800] The buggy address is located 88 bytes inside of [ 39.552800] freed 168-byte region [ffff88800d8809f8, ffff88800d880aa0) [ 39.554292] [ 39.554518] The buggy address belongs to the physical page: [ 39.555206] page:00000000482f0fe4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd880 [ 39.556335] memcg:ffff88800d631501 [ 39.556784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.557518] page_type: 0xffffffff() [ 39.557992] raw: 0100000000000200 ffff88800879fc80 ffffea00003a79c0 dead000000000003 [ 39.558944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d631501 [ 39.559901] page dumped because: kasan: bad access detected [ 39.560585] [ 39.560805] Memory state around the buggy address: [ 39.561403] ffff88800d880900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.562303] ffff88800d880980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.563205] >ffff88800d880a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.564091] ^ [ 39.564829] ffff88800d880a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 39.565730] ffff88800d880b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.566608] ================================================================== [ 39.567610] Disabling lock debugging due to kernel taint [ 41.428496] BUG: Bad rss-counter state mm:0000000057ebb706 type:MM_FILEPAGES val:33 [ 41.430083] BUG: Bad rss-counter state mm:0000000057ebb706 type:MM_ANONPAGES val:22 [ 41.898804] BUG: Bad rss-counter state mm:000000000deecd44 type:MM_FILEPAGES val:33 [ 41.899542] BUG: Bad rss-counter state mm:000000000deecd44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51782' (ECDSA) to the list of known hosts. 2023/06/19 19:35:31 fuzzer started 2023/06/19 19:35:31 dialing manager at localhost:44161 2023/06/19 19:35:31 checking machine... 2023/06/19 19:35:31 checking revisions... [ 42.599519] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:35:31 testing simple program... [ 42.646274] cgroup: Unknown subsys name 'net' [ 42.682411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:30 Registers: info registers vcpu 0 RAX=1ffff11001cc5ef7 RBX=ffff88800e62f788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e62f7b8 RBP=ffff88801a20f600 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff88801a211d98 R14=ffffffff813782a8 R15=ffff888016713b00 RIP=ffffffff8184636c RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f98b014c900 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=00007f98b0a89590 CR3=000000000ea40000 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=000055f7bb667d40000055f7bb6689c0 XMM02=0000000000000000000055f7bb6697b0 XMM03=000055f7bb669570000055f7bb6697f0 XMM04=000055f7bb669ef0000055f7bb668d00 XMM05=000055f7bb668ae0000055f7bb667ca0 XMM06=000055f7bb668310000055f7bb668290 XMM07=000055f7bb668960000055f7bb6692f0 XMM08=0000000000000000000055f7bb668ca0 XMM09=00000000ffffffffff00000000ffffff XMM10=00000000000000000000000000202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c26a92 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801650b680 RSI=ffffffff8173f468 RDI=ffff88800e135490 RBP=ffff88800e135488 RSP=ffff88801729fc08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fdca86b4fff R13=0000000000000000 R14=000000000000014c R15=00007fdca86b5000 RIP=ffffffff8173f477 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 00007fdca86c9900 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=00007fdca86a8020 CR3=000000000ca0a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000