syzkaller login: [ 60.927781] BUG: Bad rss-counter state mm:00000000ca3f93d7 type:MM_FILEPAGES val:33 [ 60.929130] BUG: Bad rss-counter state mm:00000000ca3f93d7 type:MM_ANONPAGES val:22 [ 61.081195] ================================================================== [ 61.082159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.083124] Read of size 8 at addr ffff8880167e66b0 by task sshd/220 [ 61.083895] [ 61.084175] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.085086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.086104] Call Trace: [ 61.086424] [ 61.086723] dump_stack_lvl+0x91/0xf0 [ 61.087235] print_report+0xcc/0x620 [ 61.087683] ? __virt_addr_valid+0x102/0x340 [ 61.088250] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.088884] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.089519] kasan_report+0xbe/0xf0 [ 61.090007] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.090645] vma_interval_tree_remove+0xc75/0xec0 [ 61.091255] vma_prepare+0xc54/0x11a0 [ 61.091745] __split_vma+0x5af/0x950 [ 61.092223] ? __pfx___split_vma+0x10/0x10 [ 61.092772] ? find_held_lock+0x2c/0x110 [ 61.093306] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.093888] ? lock_is_held_type+0x9f/0x120 [ 61.094493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.095116] ? mtree_range_walk+0x632/0x900 [ 61.095687] ? mas_walk+0x5c7/0x7c0 [ 61.096182] do_vmi_munmap+0x1f1/0x2b0 [ 61.096698] mmap_region+0x1f9/0x2660 [ 61.097191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.097720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.098459] ? __pfx_lock_acquire+0x10/0x10 [ 61.099008] ? __pfx_mmap_region+0x10/0x10 [ 61.099565] ? security_mmap_addr+0x7d/0xa0 [ 61.100096] ? get_unmapped_area+0x1f5/0x3f0 [ 61.100646] do_mmap+0x854/0xf00 [ 61.101089] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.101584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.102158] ksys_mmap_pgoff+0x3af/0x500 [ 61.102667] do_syscall_64+0x3f/0x90 [ 61.103145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.103790] RIP: 0033:0x7fbdc38c5d82 [ 61.104246] 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 [ 61.106403] RSP: 002b:00007fff52533e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.107314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbdc38c5d82 [ 61.108168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbdc2cff000 [ 61.109016] RBP: 00007fbdc2cff000 R08: 0000000000000009 R09: 0000000000001000 [ 61.109869] R10: 0000000000000812 R11: 0000000000000206 R12: 000056292a001ec0 [ 61.110728] R13: 00007fff52533e30 R14: 00007fff52533e60 R15: 00007fff525341c0 [ 61.111595] [ 61.111890] [ 61.112106] Allocated by task 213: [ 61.112536] kasan_save_stack+0x22/0x50 [ 61.113046] kasan_set_track+0x25/0x30 [ 61.113540] __kasan_slab_alloc+0x59/0x70 [ 61.114093] kmem_cache_alloc+0x16b/0x370 [ 61.114617] vm_area_dup+0x20/0x160 [ 61.115074] __split_vma+0x170/0x950 [ 61.115542] split_vma+0xc6/0x110 [ 61.115986] mprotect_fixup+0x8d2/0xb30 [ 61.116500] do_mprotect_pkey+0x87e/0xd40 [ 61.117027] __x64_sys_mprotect+0x78/0xc0 [ 61.117553] do_syscall_64+0x3f/0x90 [ 61.118032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.118691] [ 61.118906] Freed by task 213: [ 61.119298] kasan_save_stack+0x22/0x50 [ 61.119810] kasan_set_track+0x25/0x30 [ 61.120313] kasan_save_free_info+0x2b/0x50 [ 61.120844] __kasan_slab_free+0x10a/0x190 [ 61.121378] kmem_cache_free+0x10d/0x4d0 [ 61.121891] rcu_core+0x8c8/0x2860 [ 61.122347] __do_softirq+0x1b7/0x7d4 [ 61.122828] [ 61.123045] Last potentially related work creation: [ 61.123627] kasan_save_stack+0x22/0x50 [ 61.124139] __kasan_record_aux_stack+0x8e/0xa0 [ 61.124713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.125366] remove_vma+0x139/0x170 [ 61.125826] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.126409] do_vmi_munmap+0x1f1/0x2b0 [ 61.126902] __vm_munmap+0x138/0x3a0 [ 61.127375] __x64_sys_munmap+0x59/0x80 [ 61.127869] do_syscall_64+0x3f/0x90 [ 61.128349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.128994] [ 61.129213] The buggy address belongs to the object at ffff8880167e6658 [ 61.129213] which belongs to the cache vm_area_struct of size 168 [ 61.130703] The buggy address is located 88 bytes inside of [ 61.130703] freed 168-byte region [ffff8880167e6658, ffff8880167e6700) [ 61.132131] [ 61.132348] The buggy address belongs to the physical page: [ 61.133022] page:00000000a82f4681 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167e6 [ 61.134148] memcg:ffff88800fdb8c01 [ 61.134579] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.135266] page_type: 0xffffffff() [ 61.135714] raw: 0100000000000200 ffff8880087a0c80 ffffea0000591340 0000000000000009 [ 61.136642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb8c01 [ 61.137563] page dumped because: kasan: bad access detected [ 61.138240] [ 61.138458] Memory state around the buggy address: [ 61.139049] ffff8880167e6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.139928] ffff8880167e6600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.140791] >ffff8880167e6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.141657] ^ [ 61.142264] ffff8880167e6700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 61.143140] ffff8880167e6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.144012] ================================================================== [ 61.144993] Disabling lock debugging due to kernel taint [ 63.266800] BUG: Bad rss-counter state mm:00000000c73df1b1 type:MM_FILEPAGES val:33 [ 63.268190] BUG: Bad rss-counter state mm:00000000c73df1b1 type:MM_ANONPAGES val:22 [ 63.644906] BUG: Bad rss-counter state mm:00000000821d0d8a type:MM_FILEPAGES val:33 [ 63.645880] BUG: Bad rss-counter state mm:00000000821d0d8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33587' (ECDSA) to the list of known hosts. 2023/06/20 18:58:23 fuzzer started 2023/06/20 18:58:23 dialing manager at localhost:36067 2023/06/20 18:58:23 checking machine... 2023/06/20 18:58:23 checking revisions... [ 64.359423] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:58:23 testing simple program... [ 64.410816] cgroup: Unknown subsys name 'net' [ 64.463114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009ad5740 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018f774f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000015a8000015a8 R12=0000000000000000 R13=00000000000000e8 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff84511dd4 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 00007fcfda51d900 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=00007fcfdaad4618 CR3=0000000019d98000 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=0000000000000001 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=00007f7d0d462f50 CR3=0000000009804000 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=fca51f93d097fd96e5445fc8d746c861 XMM02=000000000011bbf8eff9b2d0a8fce9cb XMM03=000000000011bcc82c67c8bc2e329bc3 XMM04=ed7671c280d2af5c00000000000ae988 XMM05=824034fa1e726ef60000000000133630 XMM06=4fda316b135da52b00000000001326d0 XMM07=e042d86d42eb936e0000000000122c90 XMM08=cbc8b45ba8ada3ac000000000011bcc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000