syzkaller login: [ 37.290878] BUG: Bad rss-counter state mm:00000000c7e774fc type:MM_FILEPAGES val:33 [ 37.292093] BUG: Bad rss-counter state mm:00000000c7e774fc type:MM_ANONPAGES val:22 [ 37.446997] ================================================================== [ 37.447918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.448864] Read of size 8 at addr ffff888018281310 by task sshd/220 [ 37.449648] [ 37.449867] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 37.450870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.451873] Call Trace: [ 37.452195] [ 37.452505] dump_stack_lvl+0x91/0xf0 [ 37.452993] print_report+0xcc/0x620 [ 37.453487] ? __virt_addr_valid+0x102/0x340 [ 37.454048] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.454675] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.455308] kasan_report+0xbe/0xf0 [ 37.455782] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.456408] vma_interval_tree_remove+0xc75/0xec0 [ 37.457010] vma_prepare+0xc54/0x11a0 [ 37.457504] __split_vma+0x5af/0x950 [ 37.457989] ? __pfx___split_vma+0x10/0x10 [ 37.458537] ? find_held_lock+0x2c/0x110 [ 37.459068] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.459645] ? lock_is_held_type+0x9f/0x120 [ 37.460185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.460791] ? mtree_range_walk+0x632/0x900 [ 37.461348] ? mas_walk+0x5c7/0x7c0 [ 37.461836] do_vmi_munmap+0x1f1/0x2b0 [ 37.462337] mmap_region+0x1f9/0x2660 [ 37.462822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.463365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.464096] ? __pfx_lock_acquire+0x10/0x10 [ 37.464634] ? __pfx_mmap_region+0x10/0x10 [ 37.465175] ? security_mmap_addr+0x7d/0xa0 [ 37.465703] ? get_unmapped_area+0x1f5/0x3f0 [ 37.466256] do_mmap+0x854/0xf00 [ 37.466706] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.467214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.467779] ksys_mmap_pgoff+0x3af/0x500 [ 37.468286] do_syscall_64+0x3f/0x90 [ 37.468778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.469432] RIP: 0033:0x7fc2e42a6d82 [ 37.469900] 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 [ 37.472072] RSP: 002b:00007fff38199488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.472988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2e42a6d82 [ 37.473855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2e36e0000 [ 37.474714] RBP: 00007fc2e36e0000 R08: 0000000000000009 R09: 0000000000001000 [ 37.475582] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f988490ec0 [ 37.476447] R13: 00007fff381994a0 R14: 00007fff381994d0 R15: 00007fff38199830 [ 37.477308] [ 37.477605] [ 37.477820] Allocated by task 213: [ 37.478257] kasan_save_stack+0x22/0x50 [ 37.478759] kasan_set_track+0x25/0x30 [ 37.479272] __kasan_slab_alloc+0x59/0x70 [ 37.479801] kmem_cache_alloc+0x16b/0x370 [ 37.480314] vm_area_dup+0x20/0x160 [ 37.480768] __split_vma+0x170/0x950 [ 37.481236] split_vma+0xc6/0x110 [ 37.481678] mprotect_fixup+0x8d2/0xb30 [ 37.482179] do_mprotect_pkey+0x87e/0xd40 [ 37.482712] __x64_sys_mprotect+0x78/0xc0 [ 37.483257] do_syscall_64+0x3f/0x90 [ 37.483738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.484390] [ 37.484614] Freed by task 19: [ 37.485001] kasan_save_stack+0x22/0x50 [ 37.485516] kasan_set_track+0x25/0x30 [ 37.486013] kasan_save_free_info+0x2b/0x50 [ 37.486553] __kasan_slab_free+0x10a/0x190 [ 37.487103] kmem_cache_free+0x10d/0x4d0 [ 37.487615] rcu_core+0x8c8/0x2860 [ 37.488064] __do_softirq+0x1b7/0x7d4 [ 37.488546] [ 37.488765] Last potentially related work creation: [ 37.489358] kasan_save_stack+0x22/0x50 [ 37.489866] __kasan_record_aux_stack+0x8e/0xa0 [ 37.490453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.491121] remove_vma+0x139/0x170 [ 37.491577] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.492134] do_vmi_munmap+0x1f1/0x2b0 [ 37.492629] __vm_munmap+0x138/0x3a0 [ 37.493095] __x64_sys_munmap+0x59/0x80 [ 37.493606] do_syscall_64+0x3f/0x90 [ 37.494085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.494732] [ 37.494955] The buggy address belongs to the object at ffff8880182812b8 [ 37.494955] which belongs to the cache vm_area_struct of size 168 [ 37.496458] The buggy address is located 88 bytes inside of [ 37.496458] freed 168-byte region [ffff8880182812b8, ffff888018281360) [ 37.497878] [ 37.498097] The buggy address belongs to the physical page: [ 37.498754] page:00000000ede73759 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18281 [ 37.499864] memcg:ffff88800cabf101 [ 37.500295] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.500946] page_type: 0xffffffff() [ 37.501398] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 37.502318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cabf101 [ 37.503268] page dumped because: kasan: bad access detected [ 37.503936] [ 37.504152] Memory state around the buggy address: [ 37.504730] ffff888018281200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.505590] ffff888018281280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.506456] >ffff888018281300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.507324] ^ [ 37.507789] ffff888018281380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.508655] ffff888018281400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.509518] ================================================================== [ 37.510643] Disabling lock debugging due to kernel taint [ 39.528433] BUG: Bad rss-counter state mm:00000000d75f523a type:MM_FILEPAGES val:33 [ 39.529615] BUG: Bad rss-counter state mm:00000000d75f523a type:MM_ANONPAGES val:22 [ 40.110479] BUG: Bad rss-counter state mm:00000000b8d10614 type:MM_FILEPAGES val:33 [ 40.111881] BUG: Bad rss-counter state mm:00000000b8d10614 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29586' (ECDSA) to the list of known hosts. 2023/06/21 00:14:18 fuzzer started 2023/06/21 00:14:19 dialing manager at localhost:36067 2023/06/21 00:14:19 checking machine... 2023/06/21 00:14:19 checking revisions... [ 41.007231] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:14:19 testing simple program... [ 41.077326] cgroup: Unknown subsys name 'net' [ 41.140530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:18 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880158078c0 RCX=0000000000000008 RDX=0000000000001000 RSI=0000000000000503 RDI=ffff888008948000 RBP=ffff888008948000 RSP=ffff8880158075e0 R8 =0000000000000006 R9 =0000000000000321 R10=0000000000080000 R11=00000000000b6d53 R12=ffff88801002c000 R13=0000000000000503 R14=0000000000001000 R15=0000000000000008 RIP=ffffffff814c086b RFL=00000246 [---Z-P-] 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 00007f0541696900 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=00007f0540a93a70 CR3=000000000cb0c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=de465fc67740b15d00000000000ae988 XMM05=ac042bcf3c21ff1f0000000000133740 XMM06=ebb6e978ca9f579700000000001324e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e1387 RSI=ffffffff8366b8df RDI=ffff88806cf09b6c RBP=ffff88806cf09c38 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cc3 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880159e51c0 R15=ffff888019a931b0 RIP=ffffffff813ad549 RFL=00000246 [---Z-P-] 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 00007fcf83ee6700 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=00007f22783de650 CR3=000000000c9c0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32383539342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000