syzkaller login: [ 38.709228] BUG: Bad rss-counter state mm:0000000050baa6d1 type:MM_FILEPAGES val:33 [ 38.710988] BUG: Bad rss-counter state mm:0000000050baa6d1 type:MM_ANONPAGES val:22 [ 38.880814] ================================================================== [ 38.882106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883469] Read of size 8 at addr ffff88800e614058 by task sshd/220 [ 38.884432] [ 38.884697] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886992] Call Trace: [ 38.887366] [ 38.887706] dump_stack_lvl+0x91/0xf0 [ 38.888264] print_report+0xcc/0x620 [ 38.888804] ? __virt_addr_valid+0x102/0x340 [ 38.889417] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890114] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890841] kasan_report+0xbe/0xf0 [ 38.891400] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892154] vma_interval_tree_remove+0xc75/0xec0 [ 38.892859] vma_prepare+0xc54/0x11a0 [ 38.893422] __split_vma+0x5af/0x950 [ 38.893973] ? __pfx___split_vma+0x10/0x10 [ 38.894592] ? find_held_lock+0x2c/0x110 [ 38.895204] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.895873] ? lock_is_held_type+0x9f/0x120 [ 38.896500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.897212] ? mtree_range_walk+0x632/0x900 [ 38.897867] ? mas_walk+0x5c7/0x7c0 [ 38.898425] do_vmi_munmap+0x1f1/0x2b0 [ 38.898999] mmap_region+0x1f9/0x2660 [ 38.899566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.900165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900995] ? __pfx_lock_acquire+0x10/0x10 [ 38.901623] ? __pfx_mmap_region+0x10/0x10 [ 38.902245] ? security_mmap_addr+0x7d/0xa0 [ 38.902861] ? get_unmapped_area+0x1f5/0x3f0 [ 38.903503] do_mmap+0x854/0xf00 [ 38.904039] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905291] ksys_mmap_pgoff+0x3af/0x500 [ 38.905881] do_syscall_64+0x3f/0x90 [ 38.906446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907208] RIP: 0033:0x7effdece3d82 [ 38.907750] 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 [ 38.910242] RSP: 002b:00007ffd487be788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.911310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effdece3d82 [ 38.912312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effde11d000 [ 38.913305] RBP: 00007effde11d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.914300] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557fd7e55b20 [ 38.915283] R13: 00007ffd487be7a0 R14: 00007ffd487be7d0 R15: 00007ffd487beb30 [ 38.916314] [ 38.916656] [ 38.916905] Allocated by task 213: [ 38.917401] kasan_save_stack+0x22/0x50 [ 38.917998] kasan_set_track+0x25/0x30 [ 38.918585] __kasan_slab_alloc+0x59/0x70 [ 38.919208] kmem_cache_alloc+0x16b/0x370 [ 38.919824] vm_area_dup+0x20/0x160 [ 38.920355] __split_vma+0x170/0x950 [ 38.920903] split_vma+0xc6/0x110 [ 38.921408] mprotect_fixup+0x8d2/0xb30 [ 38.921994] do_mprotect_pkey+0x87e/0xd40 [ 38.922607] __x64_sys_mprotect+0x78/0xc0 [ 38.923224] do_syscall_64+0x3f/0x90 [ 38.923805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924556] [ 38.924804] Freed by task 213: [ 38.925264] kasan_save_stack+0x22/0x50 [ 38.925852] kasan_set_track+0x25/0x30 [ 38.926426] kasan_save_free_info+0x2b/0x50 [ 38.927048] __kasan_slab_free+0x10a/0x190 [ 38.927681] kmem_cache_free+0x10d/0x4d0 [ 38.928280] rcu_core+0x8c8/0x2860 [ 38.928802] __do_softirq+0x1b7/0x7d4 [ 38.929363] [ 38.929616] Last potentially related work creation: [ 38.930300] kasan_save_stack+0x22/0x50 [ 38.930888] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.932328] remove_vma+0x139/0x170 [ 38.932863] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.933520] do_vmi_munmap+0x1f1/0x2b0 [ 38.934099] __vm_munmap+0x138/0x3a0 [ 38.934653] __x64_sys_munmap+0x59/0x80 [ 38.935235] do_syscall_64+0x3f/0x90 [ 38.935810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936566] [ 38.936815] The buggy address belongs to the object at ffff88800e614000 [ 38.936815] which belongs to the cache vm_area_struct of size 168 [ 38.938532] The buggy address is located 88 bytes inside of [ 38.938532] freed 168-byte region [ffff88800e614000, ffff88800e6140a8) [ 38.940172] [ 38.940423] The buggy address belongs to the physical page: [ 38.941163] page:0000000041198c83 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e6149f8 pfn:0xe614 [ 38.942527] memcg:ffff888013fa4e01 [ 38.943000] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.943790] page_type: 0xffffffff() [ 38.944291] raw: 0100000000000200 ffff8880087a0c80 ffffea000067ddc0 dead00000000000d [ 38.945312] raw: ffff88800e6149f8 000000008011000f 00000001ffffffff ffff888013fa4e01 [ 38.946319] page dumped because: kasan: bad access detected [ 38.947050] [ 38.947290] Memory state around the buggy address: [ 38.947947] ffff88800e613f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.948940] ffff88800e613f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.949935] >ffff88800e614000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.950919] ^ [ 38.951791] ffff88800e614080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.952794] ffff88800e614100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953793] ================================================================== [ 38.954926] Disabling lock debugging due to kernel taint [ 40.895493] BUG: Bad rss-counter state mm:0000000040310d81 type:MM_FILEPAGES val:33 [ 40.896692] BUG: Bad rss-counter state mm:0000000040310d81 type:MM_ANONPAGES val:22 [ 41.278804] BUG: Bad rss-counter state mm:000000001026e58c type:MM_FILEPAGES val:33 [ 41.279861] BUG: Bad rss-counter state mm:000000001026e58c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53518' (ECDSA) to the list of known hosts. 2023/06/20 11:05:46 fuzzer started 2023/06/20 11:05:46 dialing manager at localhost:36067 2023/06/20 11:05:46 checking machine... 2023/06/20 11:05:46 checking revisions... [ 41.917992] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:05:46 testing simple program... [ 41.966085] cgroup: Unknown subsys name 'net' [ 42.016113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652d08 RCX=0000000000000100 RDX=ffff88801463b680 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800dd23500 RIP=ffffffff814c8562 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 00007f61bcd81900 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=00007f61bc1d2b60 CR3=000000000c528000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8d9618121df6eafa00000000000ae988 XMM05=27a3e33ebcac456e0000000000132aa0 XMM06=b7690a339bbbbb1100000000001314d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=00000000000018dd RSI=00000000000018dd RDI=ffffffff864efd64 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a 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 00007ff8753df900 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=00007fff6c0fc000 CR3=000000000d612000 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=6720646572637465733a4d41503d706f 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