syzkaller login: [ 31.123914] BUG: Bad rss-counter state mm:00000000f00c30b7 type:MM_FILEPAGES val:33 [ 31.125111] BUG: Bad rss-counter state mm:00000000f00c30b7 type:MM_ANONPAGES val:22 [ 31.283614] ================================================================== [ 31.284689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.286002] Read of size 8 at addr ffff88800e3114e0 by task sshd/220 [ 31.286915] [ 31.287171] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.288204] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.289184] Call Trace: [ 31.289496] [ 31.289774] dump_stack_lvl+0x91/0xf0 [ 31.290254] print_report+0xcc/0x620 [ 31.290727] ? __virt_addr_valid+0x102/0x340 [ 31.291259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291853] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292448] kasan_report+0xbe/0xf0 [ 31.292917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293535] vma_interval_tree_remove+0xc75/0xec0 [ 31.294130] vma_prepare+0xc54/0x11a0 [ 31.294600] __split_vma+0x5af/0x950 [ 31.295065] ? __pfx___split_vma+0x10/0x10 [ 31.295583] ? find_held_lock+0x2c/0x110 [ 31.296088] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296630] ? lock_is_held_type+0x9f/0x120 [ 31.297163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.297755] ? mtree_range_walk+0x632/0x900 [ 31.298288] ? mas_walk+0x5c7/0x7c0 [ 31.298757] do_vmi_munmap+0x1f1/0x2b0 [ 31.299238] mmap_region+0x1f9/0x2660 [ 31.299706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.300206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.300904] ? __pfx_lock_acquire+0x10/0x10 [ 31.301446] ? __pfx_mmap_region+0x10/0x10 [ 31.301959] ? security_mmap_addr+0x7d/0xa0 [ 31.302478] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303015] do_mmap+0x854/0xf00 [ 31.303446] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303925] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304474] ksys_mmap_pgoff+0x3af/0x500 [ 31.304966] do_syscall_64+0x3f/0x90 [ 31.305440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306082] RIP: 0033:0x7fe01c7c9d82 [ 31.306532] 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 [ 31.308628] RSP: 002b:00007fffbbc2c238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.309525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe01c7c9d82 [ 31.310350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe01bc03000 [ 31.311178] RBP: 00007fe01bc03000 R08: 0000000000000009 R09: 0000000000001000 [ 31.312006] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4fe84bb20 [ 31.312841] R13: 00007fffbbc2c250 R14: 00007fffbbc2c280 R15: 00007fffbbc2c5e0 [ 31.313699] [ 31.313981] [ 31.314190] Allocated by task 213: [ 31.314607] kasan_save_stack+0x22/0x50 [ 31.315097] kasan_set_track+0x25/0x30 [ 31.315572] __kasan_slab_alloc+0x59/0x70 [ 31.316079] kmem_cache_alloc+0x16b/0x370 [ 31.316577] vm_area_dup+0x20/0x160 [ 31.317041] __split_vma+0x170/0x950 [ 31.317499] split_vma+0xc6/0x110 [ 31.317929] mprotect_fixup+0x8d2/0xb30 [ 31.318417] do_mprotect_pkey+0x87e/0xd40 [ 31.318932] __x64_sys_mprotect+0x78/0xc0 [ 31.319446] do_syscall_64+0x3f/0x90 [ 31.319915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320560] [ 31.320771] Freed by task 213: [ 31.321164] kasan_save_stack+0x22/0x50 [ 31.321650] kasan_set_track+0x25/0x30 [ 31.322132] kasan_save_free_info+0x2b/0x50 [ 31.322658] __kasan_slab_free+0x10a/0x190 [ 31.323173] kmem_cache_free+0x10d/0x4d0 [ 31.323668] rcu_core+0x8c8/0x2860 [ 31.324099] __do_softirq+0x1b7/0x7d4 [ 31.324569] [ 31.324777] Last potentially related work creation: [ 31.325350] kasan_save_stack+0x22/0x50 [ 31.325837] __kasan_record_aux_stack+0x8e/0xa0 [ 31.326394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.327039] remove_vma+0x139/0x170 [ 31.327567] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.328109] do_vmi_munmap+0x1f1/0x2b0 [ 31.328582] __vm_munmap+0x138/0x3a0 [ 31.329039] __x64_sys_munmap+0x59/0x80 [ 31.329528] do_syscall_64+0x3f/0x90 [ 31.329989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330615] [ 31.330823] The buggy address belongs to the object at ffff88800e311488 [ 31.330823] which belongs to the cache vm_area_struct of size 168 [ 31.332241] The buggy address is located 88 bytes inside of [ 31.332241] freed 168-byte region [ffff88800e311488, ffff88800e311530) [ 31.333666] [ 31.333875] The buggy address belongs to the physical page: [ 31.334516] page:000000008522f357 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe311 [ 31.335561] memcg:ffff88800e716001 [ 31.335975] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.336601] page_type: 0xffffffff() [ 31.337058] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8e00 dead000000000002 [ 31.337956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e716001 [ 31.338842] page dumped because: kasan: bad access detected [ 31.339490] [ 31.339698] Memory state around the buggy address: [ 31.340258] ffff88800e311380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.341104] ffff88800e311400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.341937] >ffff88800e311480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.342762] ^ [ 31.343492] ffff88800e311500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.344324] ffff88800e311580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.345152] ================================================================== [ 31.346138] Disabling lock debugging due to kernel taint [ 33.687390] BUG: Bad rss-counter state mm:0000000075425eb9 type:MM_FILEPAGES val:33 [ 33.688355] BUG: Bad rss-counter state mm:0000000075425eb9 type:MM_ANONPAGES val:22 [ 34.191891] BUG: Bad rss-counter state mm:000000006afc72ec type:MM_FILEPAGES val:33 [ 34.193093] BUG: Bad rss-counter state mm:000000006afc72ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4686' (ECDSA) to the list of known hosts. 2023/06/21 02:31:49 fuzzer started 2023/06/21 02:31:50 dialing manager at localhost:36067 2023/06/21 02:31:50 checking machine... 2023/06/21 02:31:50 checking revisions... [ 34.894598] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:31:50 testing simple program... [ 34.950455] cgroup: Unknown subsys name 'net' [ 35.010543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:31:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801428b680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff88801428ba74 RBP=ffff88801428b680 RSP=ffff8880103c75c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f4162669c64 R13=0000000000000000 R14=ffff88801428b680 R15=0000000000092cc0 RIP=ffffffff8135bdea 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 00007f4161db0900 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=00007f41611df260 CR3=000000000c75e000 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=dbf4b48e944fd20f00000000000ae988 XMM05=df76b0fcf4be0ac90000000000132c20 XMM06=df8ea9f5179b2e9b00000000001319c0 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=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e1399 RSP=ffff88806cf09ca8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffffffff8560b640 R13=ffffffff81828d41 R14=ffff88800e3aab10 R15=0000000000000001 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f0ed3317900 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=00007ffcf5f2dc8c CR3=000000000e942000 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=00ff00000000000000000000000000ff XMM05=00ff00000000000000000000000000ff XMM06=56002669410f2e7420322e322e301a00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000