syzkaller login: [ 27.182919] BUG: Bad rss-counter state mm:0000000080dda554 type:MM_FILEPAGES val:33 [ 27.183906] BUG: Bad rss-counter state mm:0000000080dda554 type:MM_ANONPAGES val:22 [ 27.356676] ================================================================== [ 27.357583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.358548] Read of size 8 at addr ffff88801840d5c8 by task sshd/220 [ 27.359323] [ 27.359544] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.360580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.361555] Call Trace: [ 27.361902] [ 27.362198] dump_stack_lvl+0x91/0xf0 [ 27.362701] print_report+0xcc/0x620 [ 27.363184] ? __virt_addr_valid+0x102/0x340 [ 27.363740] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.364365] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.364981] kasan_report+0xbe/0xf0 [ 27.365454] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.366087] vma_interval_tree_remove+0xc75/0xec0 [ 27.366685] vma_prepare+0xc54/0x11a0 [ 27.367160] __split_vma+0x5af/0x950 [ 27.367622] ? __pfx___split_vma+0x10/0x10 [ 27.368140] ? find_held_lock+0x2c/0x110 [ 27.368653] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.369208] ? lock_is_held_type+0x9f/0x120 [ 27.369762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.370362] ? mtree_range_walk+0x632/0x900 [ 27.370904] ? mas_walk+0x5c7/0x7c0 [ 27.371370] do_vmi_munmap+0x1f1/0x2b0 [ 27.371856] mmap_region+0x1f9/0x2660 [ 27.372331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.372834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.373537] ? __pfx_lock_acquire+0x10/0x10 [ 27.374075] ? __pfx_mmap_region+0x10/0x10 [ 27.374597] ? security_mmap_addr+0x7d/0xa0 [ 27.375123] ? get_unmapped_area+0x1f5/0x3f0 [ 27.375667] do_mmap+0x854/0xf00 [ 27.376107] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.376600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.377163] ksys_mmap_pgoff+0x3af/0x500 [ 27.377665] do_syscall_64+0x3f/0x90 [ 27.378160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.378797] RIP: 0033:0x7f9413184d82 [ 27.379248] 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 [ 27.381359] RSP: 002b:00007ffd99ca8018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.382253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9413184d82 [ 27.383096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94125be000 [ 27.383934] RBP: 00007f94125be000 R08: 0000000000000009 R09: 0000000000001000 [ 27.384771] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616526fdec0 [ 27.385618] R13: 00007ffd99ca8030 R14: 00007ffd99ca8060 R15: 00007ffd99ca83c0 [ 27.386488] [ 27.386776] [ 27.386988] Allocated by task 213: [ 27.387414] kasan_save_stack+0x22/0x50 [ 27.387923] kasan_set_track+0x25/0x30 [ 27.388408] __kasan_slab_alloc+0x59/0x70 [ 27.388923] kmem_cache_alloc+0x16b/0x370 [ 27.389432] vm_area_dup+0x20/0x160 [ 27.389907] __split_vma+0x170/0x950 [ 27.390374] split_vma+0xc6/0x110 [ 27.390809] mprotect_fixup+0x8d2/0xb30 [ 27.391305] do_mprotect_pkey+0x87e/0xd40 [ 27.391819] __x64_sys_mprotect+0x78/0xc0 [ 27.392340] do_syscall_64+0x3f/0x90 [ 27.392808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.393447] [ 27.393659] Freed by task 200: [ 27.394057] kasan_save_stack+0x22/0x50 [ 27.394558] kasan_set_track+0x25/0x30 [ 27.395052] kasan_save_free_info+0x2b/0x50 [ 27.395577] __kasan_slab_free+0x10a/0x190 [ 27.396102] kmem_cache_free+0x10d/0x4d0 [ 27.396602] rcu_core+0x8c8/0x2860 [ 27.397039] __do_softirq+0x1b7/0x7d4 [ 27.397516] [ 27.397745] Last potentially related work creation: [ 27.398327] kasan_save_stack+0x22/0x50 [ 27.398824] __kasan_record_aux_stack+0x8e/0xa0 [ 27.399392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.400026] remove_vma+0x139/0x170 [ 27.400474] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.401029] do_vmi_munmap+0x1f1/0x2b0 [ 27.401556] __vm_munmap+0x138/0x3a0 [ 27.402025] __x64_sys_munmap+0x59/0x80 [ 27.402513] do_syscall_64+0x3f/0x90 [ 27.402979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.403621] [ 27.403833] The buggy address belongs to the object at ffff88801840d570 [ 27.403833] which belongs to the cache vm_area_struct of size 168 [ 27.405278] The buggy address is located 88 bytes inside of [ 27.405278] freed 168-byte region [ffff88801840d570, ffff88801840d618) [ 27.406685] [ 27.406899] The buggy address belongs to the physical page: [ 27.407551] page:000000000791efb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1840d [ 27.408634] memcg:ffff88801400ca01 [ 27.409064] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.409709] page_type: 0xffffffff() [ 27.410157] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.411119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801400ca01 [ 27.412059] page dumped because: kasan: bad access detected [ 27.412726] [ 27.412944] Memory state around the buggy address: [ 27.413527] ffff88801840d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.414429] ffff88801840d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 27.415313] >ffff88801840d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.416179] ^ [ 27.416862] ffff88801840d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 27.417735] ffff88801840d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.418603] ================================================================== [ 27.419596] Disabling lock debugging due to kernel taint [ 29.622955] BUG: Bad rss-counter state mm:0000000058fea4bd type:MM_FILEPAGES val:33 [ 29.623936] BUG: Bad rss-counter state mm:0000000058fea4bd type:MM_ANONPAGES val:22 [ 30.089300] BUG: Bad rss-counter state mm:00000000fa6f9c66 type:MM_FILEPAGES val:33 [ 30.090320] BUG: Bad rss-counter state mm:00000000fa6f9c66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4393' (ECDSA) to the list of known hosts. 2023/06/19 12:07:51 fuzzer started 2023/06/19 12:07:51 dialing manager at localhost:44161 2023/06/19 12:07:51 checking machine... 2023/06/19 12:07:51 checking revisions... [ 30.861873] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:07:51 testing simple program... [ 30.920650] cgroup: Unknown subsys name 'net' [ 30.981340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:07:47 Registers: info registers vcpu 0 RAX=ffff888018eeb3c0 RBX=1ffff11002822fa2 RCX=0000000000000000 RDX=ffff888017423680 RSI=ffffffff83635959 RDI=ffff88800d7d7330 RBP=ffff888018eeb3c0 RSP=ffff888014117cf0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800d7d7180 R11=0000000000000000 R12=00007ffd08d317bc R13=0000000000000042 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000286 [--S--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 00007f83fe25c900 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=00007ffd08d32000 CR3=000000000fb52000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffffffff813782a8 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000002400f R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88806cf09a78 RIP=ffffffff8113062c 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=00007f6300426000 CR3=000000000c4de000 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=30664ecb0d29d59acf44fd685ab317c9 XMM02=000000000011d720ec2efd57dc4c00df XMM03=0000000000124b40935759f6039a7501 XMM04=5c32f311c9ac63a000000000000ae988 XMM05=bfb0f6d8bd4215120000000000135478 XMM06=4fda316b135da52b0000000000134530 XMM07=e042d86d42eb936e0000000000124e18 XMM08=935759f6039a7501000000000011d780 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000