syzkaller login: [ 30.364598] BUG: Bad rss-counter state mm:0000000001a96c86 type:MM_FILEPAGES val:33 [ 30.365668] BUG: Bad rss-counter state mm:0000000001a96c86 type:MM_ANONPAGES val:22 [ 30.531137] ================================================================== [ 30.532210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.533340] Read of size 8 at addr ffff888018f1ded8 by task sshd/221 [ 30.534387] [ 30.534606] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.535466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.536462] Call Trace: [ 30.536792] [ 30.537079] dump_stack_lvl+0x91/0xf0 [ 30.537577] print_report+0xcc/0x620 [ 30.538055] ? __virt_addr_valid+0x102/0x340 [ 30.538599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539817] kasan_report+0xbe/0xf0 [ 30.540291] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540914] vma_interval_tree_remove+0xc75/0xec0 [ 30.541513] vma_prepare+0xc54/0x11a0 [ 30.541991] __split_vma+0x5af/0x950 [ 30.542457] ? __pfx___split_vma+0x10/0x10 [ 30.542986] ? find_held_lock+0x2c/0x110 [ 30.543515] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.544080] ? lock_is_held_type+0x9f/0x120 [ 30.544643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.545242] ? mtree_range_walk+0x632/0x900 [ 30.545789] ? mas_walk+0x5c7/0x7c0 [ 30.546262] do_vmi_munmap+0x1f1/0x2b0 [ 30.546749] mmap_region+0x1f9/0x2660 [ 30.547225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.547744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.548473] ? __pfx_lock_acquire+0x10/0x10 [ 30.549003] ? __pfx_mmap_region+0x10/0x10 [ 30.549527] ? security_mmap_addr+0x7d/0xa0 [ 30.550051] ? get_unmapped_area+0x1f5/0x3f0 [ 30.550599] do_mmap+0x854/0xf00 [ 30.551037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.551530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.552089] ksys_mmap_pgoff+0x3af/0x500 [ 30.552601] do_syscall_64+0x3f/0x90 [ 30.553081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.553724] RIP: 0033:0x7fdd180f2d82 [ 30.554176] 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 [ 30.556279] RSP: 002b:00007fff9e47ebf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.557196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd180f2d82 [ 30.558045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd1752c000 [ 30.558894] RBP: 00007fdd1752c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.559735] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c37e983ec0 [ 30.560588] R13: 00007fff9e47ec10 R14: 00007fff9e47ec40 R15: 00007fff9e47efa0 [ 30.561436] [ 30.561820] [ 30.562032] Allocated by task 214: [ 30.562456] kasan_save_stack+0x22/0x50 [ 30.562953] kasan_set_track+0x25/0x30 [ 30.563438] __kasan_slab_alloc+0x59/0x70 [ 30.563951] kmem_cache_alloc+0x16b/0x370 [ 30.564476] vm_area_dup+0x20/0x160 [ 30.564916] __split_vma+0x170/0x950 [ 30.565366] split_vma+0xc6/0x110 [ 30.565792] mprotect_fixup+0x8d2/0xb30 [ 30.566276] do_mprotect_pkey+0x87e/0xd40 [ 30.566785] __x64_sys_mprotect+0x78/0xc0 [ 30.567300] do_syscall_64+0x3f/0x90 [ 30.567782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568453] [ 30.568674] Freed by task 19: [ 30.569065] kasan_save_stack+0x22/0x50 [ 30.569571] kasan_set_track+0x25/0x30 [ 30.570068] kasan_save_free_info+0x2b/0x50 [ 30.570584] __kasan_slab_free+0x10a/0x190 [ 30.571110] kmem_cache_free+0x10d/0x4d0 [ 30.571602] rcu_core+0x8c8/0x2860 [ 30.572042] __do_softirq+0x1b7/0x7d4 [ 30.572513] [ 30.572725] Last potentially related work creation: [ 30.573315] kasan_save_stack+0x22/0x50 [ 30.573830] __kasan_record_aux_stack+0x8e/0xa0 [ 30.574404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575055] remove_vma+0x139/0x170 [ 30.575608] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576179] do_vmi_munmap+0x1f1/0x2b0 [ 30.576681] __vm_munmap+0x138/0x3a0 [ 30.577147] __x64_sys_munmap+0x59/0x80 [ 30.577656] do_syscall_64+0x3f/0x90 [ 30.578135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578772] [ 30.578985] The buggy address belongs to the object at ffff888018f1de80 [ 30.578985] which belongs to the cache vm_area_struct of size 168 [ 30.580418] The buggy address is located 88 bytes inside of [ 30.580418] freed 168-byte region [ffff888018f1de80, ffff888018f1df28) [ 30.581778] [ 30.581989] The buggy address belongs to the physical page: [ 30.582623] page:0000000086f2c4c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f1d [ 30.583679] memcg:ffff88800d7a7401 [ 30.584094] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.584726] page_type: 0xffffffff() [ 30.585163] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.586050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a7401 [ 30.586929] page dumped because: kasan: bad access detected [ 30.587565] [ 30.587776] Memory state around the buggy address: [ 30.588353] ffff888018f1dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.589181] ffff888018f1de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.590030] >ffff888018f1de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.590897] ^ [ 30.591626] ffff888018f1df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.592515] ffff888018f1df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.593345] ================================================================== [ 30.594276] Disabling lock debugging due to kernel taint [ 32.715427] BUG: Bad rss-counter state mm:00000000c0bc9b1a type:MM_FILEPAGES val:33 [ 32.716466] BUG: Bad rss-counter state mm:00000000c0bc9b1a type:MM_ANONPAGES val:22 [ 33.162308] BUG: Bad rss-counter state mm:00000000b138ac89 type:MM_FILEPAGES val:33 [ 33.163938] BUG: Bad rss-counter state mm:00000000b138ac89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2445' (ECDSA) to the list of known hosts. 2023/06/20 13:22:40 fuzzer started 2023/06/20 13:22:40 dialing manager at localhost:36067 2023/06/20 13:22:40 checking machine... 2023/06/20 13:22:40 checking revisions... [ 33.862441] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:22:40 testing simple program... [ 33.915426] cgroup: Unknown subsys name 'net' [ 33.974408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100395bfb8 RSP=ffff88801cadfdb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff8171b018 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f83f2580900 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=00007f83f2b37618 CR3=000000000c5bc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f0c9ad39570 CR3=000000000f558000 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=4a7e8277506e2cb08f4961b49b3a731d XMM02=000000000011da70ec2efd57dc4c00df XMM03=0000000000121f0879ba24a1979b1d00 XMM04=d398549f6d63b90f00000000000ae988 XMM05=f0d0b16d0419be320000000000132e00 XMM06=c291bd5c70af25b90000000000131ea0 XMM07=e042d86d42eb936e0000000000122188 XMM08=79ba24a1979b1d00000000000011dad0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000