syzkaller login: [ 32.521563] BUG: Bad rss-counter state mm:00000000462fc605 type:MM_FILEPAGES val:33 [ 32.522345] BUG: Bad rss-counter state mm:00000000462fc605 type:MM_ANONPAGES val:22 [ 32.725353] ================================================================== [ 32.726069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.731288] Read of size 8 at addr ffff88800fcce880 by task sshd/223 [ 32.731842] [ 32.732004] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.732685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.733421] Call Trace: [ 32.733655] [ 32.733873] dump_stack_lvl+0x91/0xf0 [ 32.734281] print_report+0xcc/0x620 [ 32.739139] ? __virt_addr_valid+0x102/0x340 [ 32.739554] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.740009] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.740505] kasan_report+0xbe/0xf0 [ 32.740869] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.741339] vma_interval_tree_remove+0xc75/0xec0 [ 32.741728] vma_prepare+0xc54/0x11a0 [ 32.742038] __split_vma+0x5af/0x950 [ 32.742372] ? __pfx___split_vma+0x10/0x10 [ 32.742751] ? find_held_lock+0x2c/0x110 [ 32.743094] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.743518] ? lock_is_held_type+0x9f/0x120 [ 32.743872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.744261] ? mtree_range_walk+0x632/0x900 [ 32.744624] ? mas_walk+0x5c7/0x7c0 [ 32.744937] do_vmi_munmap+0x1f1/0x2b0 [ 32.745261] mmap_region+0x1f9/0x2660 [ 32.745572] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.745902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.746397] ? __pfx_lock_acquire+0x10/0x10 [ 32.746821] ? __pfx_mmap_region+0x10/0x10 [ 32.747177] ? security_mmap_addr+0x7d/0xa0 [ 32.747525] ? get_unmapped_area+0x1f5/0x3f0 [ 32.747887] do_mmap+0x854/0xf00 [ 32.748164] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.748489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.748819] ksys_mmap_pgoff+0x3af/0x500 [ 32.749117] do_syscall_64+0x3f/0x90 [ 32.749443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.749834] RIP: 0033:0x7f8f37bb4d82 [ 32.750109] 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 [ 32.751553] RSP: 002b:00007ffe9aac0448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.752123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f37bb4d82 [ 32.752697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f36fee000 [ 32.753225] RBP: 00007f8f36fee000 R08: 0000000000000009 R09: 0000000000001000 [ 32.753753] R10: 0000000000000812 R11: 0000000000000206 R12: 000056450dce9ec0 [ 32.754307] R13: 00007ffe9aac0460 R14: 00007ffe9aac0490 R15: 00007ffe9aac07f0 [ 32.754908] [ 32.755151] [ 32.755288] Allocated by task 214: [ 32.755583] kasan_save_stack+0x22/0x50 [ 32.755885] kasan_set_track+0x25/0x30 [ 32.756178] __kasan_slab_alloc+0x59/0x70 [ 32.756492] kmem_cache_alloc+0x16b/0x370 [ 32.756799] vm_area_dup+0x20/0x160 [ 32.757076] __split_vma+0x170/0x950 [ 32.757360] split_vma+0xc6/0x110 [ 32.757615] mprotect_fixup+0x8d2/0xb30 [ 32.757910] do_mprotect_pkey+0x87e/0xd40 [ 32.758221] __x64_sys_mprotect+0x78/0xc0 [ 32.758539] do_syscall_64+0x3f/0x90 [ 32.758899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.759356] [ 32.759511] Freed by task 214: [ 32.759786] kasan_save_stack+0x22/0x50 [ 32.760143] kasan_set_track+0x25/0x30 [ 32.760496] kasan_save_free_info+0x2b/0x50 [ 32.760861] __kasan_slab_free+0x10a/0x190 [ 32.761242] kmem_cache_free+0x10d/0x4d0 [ 32.761646] rcu_core+0x8c8/0x2860 [ 32.761972] __do_softirq+0x1b7/0x7d4 [ 32.762314] [ 32.762466] Last potentially related work creation: [ 32.762897] kasan_save_stack+0x22/0x50 [ 32.763222] __kasan_record_aux_stack+0x8e/0xa0 [ 32.763603] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.764003] remove_vma+0x139/0x170 [ 32.764285] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.764668] do_vmi_munmap+0x1f1/0x2b0 [ 32.764971] __vm_munmap+0x138/0x3a0 [ 32.765265] __x64_sys_munmap+0x59/0x80 [ 32.765577] do_syscall_64+0x3f/0x90 [ 32.765874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.766294] [ 32.766440] The buggy address belongs to the object at ffff88800fcce828 [ 32.766440] which belongs to the cache vm_area_struct of size 168 [ 32.767472] The buggy address is located 88 bytes inside of [ 32.767472] freed 168-byte region [ffff88800fcce828, ffff88800fcce8d0) [ 32.768350] [ 32.768480] The buggy address belongs to the physical page: [ 32.768868] page:0000000022708b03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcce [ 32.769542] memcg:ffff88800d079c01 [ 32.769797] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.770215] page_type: 0xffffffff() [ 32.770486] raw: 0100000000000200 ffff88800879fc80 ffffea000061bd00 dead000000000003 [ 32.771071] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d079c01 [ 32.771654] page dumped because: kasan: bad access detected [ 32.772054] [ 32.772183] Memory state around the buggy address: [ 32.772574] ffff88800fcce780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.773083] ffff88800fcce800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.773599] >ffff88800fcce880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.774128] ^ [ 32.774412] ffff88800fcce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.775045] ffff88800fcce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.775620] ================================================================== [ 32.776279] Disabling lock debugging due to kernel taint [ 35.342122] BUG: Bad rss-counter state mm:000000000e03a468 type:MM_FILEPAGES val:33 [ 35.342876] BUG: Bad rss-counter state mm:000000000e03a468 type:MM_ANONPAGES val:22 [ 36.374696] BUG: Bad rss-counter state mm:0000000085f0bced type:MM_FILEPAGES val:33 [ 36.375392] BUG: Bad rss-counter state mm:0000000085f0bced type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53107' (ECDSA) to the list of known hosts. 2023/06/20 10:21:16 fuzzer started 2023/06/20 10:21:16 dialing manager at localhost:44161 2023/06/20 10:21:16 checking machine... 2023/06/20 10:21:16 checking revisions... [ 37.125676] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:21:16 testing simple program... [ 37.183788] cgroup: Unknown subsys name 'net' [ 37.283749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:21:14 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce091c8 RSP=ffff88806ce09100 R8 =0000000000000001 R9 =ffffed100d9c122c R10=ffff88806ce09167 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000202 [-------] 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 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=00007f1e40098328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff84506c7f RCX=0000000000000001 RDX=1ffff11001f8cecb RSI=ffff88800fc67f10 RDI=ffffffff84506c7f RBP=ffff88800fc67658 RSP=ffff88800fc675d8 R8 =0000000000000001 R9 =ffff88800fc67640 R10=0000000000038001 R11=000000000000713e R12=ffff88800fc676c8 R13=0000000000000000 R14=ffff88800f598000 R15=ffff888013aae4c0 RIP=ffffffff811fc8a1 RFL=00000202 [-------] 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 00007fbe8173a900 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=00007fbe8173a6f8 CR3=0000000016754000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000