syzkaller login: [ 60.158711] BUG: Bad rss-counter state mm:000000000a8e2c56 type:MM_FILEPAGES val:33 [ 60.160152] BUG: Bad rss-counter state mm:000000000a8e2c56 type:MM_ANONPAGES val:22 [ 60.304102] ================================================================== [ 60.305055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.305999] Read of size 8 at addr ffff88801b010a50 by task sshd/221 [ 60.306772] [ 60.307089] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.307960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.309002] Call Trace: [ 60.309321] [ 60.309612] dump_stack_lvl+0x91/0xf0 [ 60.310103] print_report+0xcc/0x620 [ 60.310588] ? __virt_addr_valid+0x102/0x340 [ 60.311144] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.311773] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.312418] kasan_report+0xbe/0xf0 [ 60.312900] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.313514] vma_interval_tree_remove+0xc75/0xec0 [ 60.314124] vma_prepare+0xc54/0x11a0 [ 60.314609] __split_vma+0x5af/0x950 [ 60.315087] ? __pfx___split_vma+0x10/0x10 [ 60.315626] ? find_held_lock+0x2c/0x110 [ 60.316164] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.316770] ? lock_is_held_type+0x9f/0x120 [ 60.317332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.317961] ? mtree_range_walk+0x632/0x900 [ 60.318533] ? mas_walk+0x5c7/0x7c0 [ 60.319027] do_vmi_munmap+0x1f1/0x2b0 [ 60.319527] mmap_region+0x1f9/0x2660 [ 60.320025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.320587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.321319] ? __pfx_lock_acquire+0x10/0x10 [ 60.321848] ? __pfx_mmap_region+0x10/0x10 [ 60.322376] ? security_mmap_addr+0x7d/0xa0 [ 60.322913] ? get_unmapped_area+0x1f5/0x3f0 [ 60.323467] do_mmap+0x854/0xf00 [ 60.323923] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.324452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.325025] ksys_mmap_pgoff+0x3af/0x500 [ 60.325546] do_syscall_64+0x3f/0x90 [ 60.326035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.326691] RIP: 0033:0x7f9b1e944d82 [ 60.327151] 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 [ 60.329333] RSP: 002b:00007ffe344dcf98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.330256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b1e944d82 [ 60.331110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b1dd7e000 [ 60.332203] RBP: 00007f9b1dd7e000 R08: 0000000000000009 R09: 0000000000001000 [ 60.333061] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d8d0b6ec0 [ 60.333921] R13: 00007ffe344dcfb0 R14: 00007ffe344dcfe0 R15: 00007ffe344dd340 [ 60.334780] [ 60.335076] [ 60.335292] Allocated by task 213: [ 60.335732] kasan_save_stack+0x22/0x50 [ 60.336281] kasan_set_track+0x25/0x30 [ 60.336778] __kasan_slab_alloc+0x59/0x70 [ 60.337312] kmem_cache_alloc+0x16b/0x370 [ 60.337840] vm_area_dup+0x20/0x160 [ 60.338296] __split_vma+0x170/0x950 [ 60.338772] split_vma+0xc6/0x110 [ 60.339224] mprotect_fixup+0x8d2/0xb30 [ 60.339730] do_mprotect_pkey+0x87e/0xd40 [ 60.340334] __x64_sys_mprotect+0x78/0xc0 [ 60.340870] do_syscall_64+0x3f/0x90 [ 60.341351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.342005] [ 60.342219] Freed by task 213: [ 60.342610] kasan_save_stack+0x22/0x50 [ 60.343116] kasan_set_track+0x25/0x30 [ 60.343614] kasan_save_free_info+0x2b/0x50 [ 60.344161] __kasan_slab_free+0x10a/0x190 [ 60.344742] kmem_cache_free+0x10d/0x4d0 [ 60.345253] rcu_core+0x8c8/0x2860 [ 60.345700] __do_softirq+0x1b7/0x7d4 [ 60.346185] [ 60.346401] Last potentially related work creation: [ 60.347004] kasan_save_stack+0x22/0x50 [ 60.347512] __kasan_record_aux_stack+0x8e/0xa0 [ 60.348203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.348873] remove_vma+0x139/0x170 [ 60.349331] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.349889] do_vmi_munmap+0x1f1/0x2b0 [ 60.350385] __vm_munmap+0x138/0x3a0 [ 60.350853] __x64_sys_munmap+0x59/0x80 [ 60.351352] do_syscall_64+0x3f/0x90 [ 60.351841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.352517] [ 60.352739] The buggy address belongs to the object at ffff88801b0109f8 [ 60.352739] which belongs to the cache vm_area_struct of size 168 [ 60.354227] The buggy address is located 88 bytes inside of [ 60.354227] freed 168-byte region [ffff88801b0109f8, ffff88801b010aa0) [ 60.355649] [ 60.355867] The buggy address belongs to the physical page: [ 60.356565] page:000000003fa4e290 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b010 [ 60.357685] memcg:ffff888018030201 [ 60.358111] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.358755] page_type: 0xffffffff() [ 60.359210] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.360133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018030201 [ 60.361098] page dumped because: kasan: bad access detected [ 60.361763] [ 60.361984] Memory state around the buggy address: [ 60.362568] ffff88801b010900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.363436] ffff88801b010980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 60.364334] >ffff88801b010a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.365203] ^ [ 60.365912] ffff88801b010a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 60.366766] ffff88801b010b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.367627] ================================================================== [ 60.368787] Disabling lock debugging due to kernel taint [ 63.388784] BUG: Bad rss-counter state mm:00000000d8f2dee9 type:MM_FILEPAGES val:33 [ 63.389879] BUG: Bad rss-counter state mm:00000000d8f2dee9 type:MM_ANONPAGES val:22 [ 63.912656] BUG: Bad rss-counter state mm:00000000f37dc6dd type:MM_FILEPAGES val:33 [ 63.913839] BUG: Bad rss-counter state mm:00000000f37dc6dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8589' (ECDSA) to the list of known hosts. 2023/06/20 23:10:08 fuzzer started 2023/06/20 23:10:08 dialing manager at localhost:36067 2023/06/20 23:10:08 checking machine... 2023/06/20 23:10:08 checking revisions... [ 64.546929] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:08 testing simple program... [ 64.605398] cgroup: Unknown subsys name 'net' [ 64.648571] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015c47df0 RCX=0000000000000000 RDX=ffff8880147d51c0 RSI=ffffffff81859a8e RDI=0000000000000007 RBP=0000000000088802 RSP=ffff888015c47d80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008802 R13=ffff888015c47ea8 R14=0000000000000006 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007f4553da8900 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=00007f4553203010 CR3=000000000c624000 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=d1f0041de030dc5300000000000ae988 XMM05=d8818865083fd1050000000000132018 XMM06=c291bd5c70af25b900000000001310b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000009d7ae343 RBX=00000000e8ff4276 RCX=00000000e3439d7a RDX=0000000000000007 RSI=0000000000000002 RDI=00000000e1a52191 RBP=ffffffff813782f8 RSP=ffff88806cf09b68 R8 =0000000023c0916b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270553 RFL=00000293 [--S-A-C] 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 00007f4fbde45900 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=00007f4fbe999044 CR3=000000000eaf2000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=61808b882d70d8ad3a4d5e5744e1fd7d XMM05=00000000000000000000000000000000 XMM06=617365632d70733d3a4d5e204473733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000