syzkaller login: [ 30.143140] BUG: Bad rss-counter state mm:00000000a990d5fe type:MM_FILEPAGES val:33 [ 30.144224] BUG: Bad rss-counter state mm:00000000a990d5fe type:MM_ANONPAGES val:22 [ 30.323770] ================================================================== [ 30.324824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.325910] Read of size 8 at addr ffff88801836a880 by task sshd/221 [ 30.326690] [ 30.326912] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.327798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.328800] Call Trace: [ 30.329121] <TASK> [ 30.329412] dump_stack_lvl+0x91/0xf0 [ 30.329901] print_report+0xcc/0x620 [ 30.330391] ? __virt_addr_valid+0x102/0x340 [ 30.330934] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.331555] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.332180] kasan_report+0xbe/0xf0 [ 30.332655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333284] vma_interval_tree_remove+0xc75/0xec0 [ 30.333894] vma_prepare+0xc54/0x11a0 [ 30.334382] __split_vma+0x5af/0x950 [ 30.334860] ? __pfx___split_vma+0x10/0x10 [ 30.335396] ? find_held_lock+0x2c/0x110 [ 30.335940] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.336519] ? lock_is_held_type+0x9f/0x120 [ 30.337061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.337676] ? mtree_range_walk+0x632/0x900 [ 30.338241] ? mas_walk+0x5c7/0x7c0 [ 30.338730] do_vmi_munmap+0x1f1/0x2b0 [ 30.339227] mmap_region+0x1f9/0x2660 [ 30.339712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.340248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.340980] ? __pfx_lock_acquire+0x10/0x10 [ 30.341524] ? __pfx_mmap_region+0x10/0x10 [ 30.342061] ? security_mmap_addr+0x7d/0xa0 [ 30.342594] ? get_unmapped_area+0x1f5/0x3f0 [ 30.343158] do_mmap+0x854/0xf00 [ 30.343603] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.344120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.344693] ksys_mmap_pgoff+0x3af/0x500 [ 30.345209] do_syscall_64+0x3f/0x90 [ 30.345693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.346347] RIP: 0033:0x7fc3c9367d82 [ 30.346809] 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 [ 30.348954] RSP: 002b:00007fff1d676688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.349876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3c9367d82 [ 30.350727] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3c87a1000 [ 30.351591] RBP: 00007fc3c87a1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.352471] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4763a6d90 [ 30.353328] R13: 00007fff1d6766a0 R14: 00007fff1d6766d0 R15: 00007fff1d676a30 [ 30.354183] </TASK> [ 30.354475] [ 30.354686] Allocated by task 214: [ 30.355111] kasan_save_stack+0x22/0x50 [ 30.355621] kasan_set_track+0x25/0x30 [ 30.356130] __kasan_slab_alloc+0x59/0x70 [ 30.356653] kmem_cache_alloc+0x16b/0x370 [ 30.357172] vm_area_dup+0x20/0x160 [ 30.357628] __split_vma+0x170/0x950 [ 30.358103] split_vma+0xc6/0x110 [ 30.358554] mprotect_fixup+0x8d2/0xb30 [ 30.359058] do_mprotect_pkey+0x87e/0xd40 [ 30.359584] __x64_sys_mprotect+0x78/0xc0 [ 30.360122] do_syscall_64+0x3f/0x90 [ 30.360598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361246] [ 30.361466] Freed by task 13: [ 30.361851] kasan_save_stack+0x22/0x50 [ 30.362363] kasan_set_track+0x25/0x30 [ 30.362862] kasan_save_free_info+0x2b/0x50 [ 30.363402] __kasan_slab_free+0x10a/0x190 [ 30.363944] kmem_cache_free+0x10d/0x4d0 [ 30.364452] rcu_core+0x8c8/0x2860 [ 30.364904] __do_softirq+0x1b7/0x7d4 [ 30.365387] [ 30.365609] Last potentially related work creation: [ 30.366201] kasan_save_stack+0x22/0x50 [ 30.366707] __kasan_record_aux_stack+0x8e/0xa0 [ 30.367283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.367938] remove_vma+0x139/0x170 [ 30.368393] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.368950] do_vmi_munmap+0x1f1/0x2b0 [ 30.369437] __vm_munmap+0x138/0x3a0 [ 30.369910] __x64_sys_munmap+0x59/0x80 [ 30.370417] do_syscall_64+0x3f/0x90 [ 30.370887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371535] [ 30.371752] The buggy address belongs to the object at ffff88801836a828 [ 30.371752] which belongs to the cache vm_area_struct of size 168 [ 30.373242] The buggy address is located 88 bytes inside of [ 30.373242] freed 168-byte region [ffff88801836a828, ffff88801836a8d0) [ 30.374650] [ 30.374870] The buggy address belongs to the physical page: [ 30.375528] page:0000000088e7c810 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1836a [ 30.376644] memcg:ffff8880195e5d01 [ 30.377068] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.377712] page_type: 0xffffffff() [ 30.378170] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.379092] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195e5d01 [ 30.380028] page dumped because: kasan: bad access detected [ 30.380700] [ 30.380919] Memory state around the buggy address: [ 30.381498] ffff88801836a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.382354] ffff88801836a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.383219] >ffff88801836a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.384081] ^ [ 30.384500] ffff88801836a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.385355] ffff88801836a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.386210] ================================================================== [ 30.387332] Disabling lock debugging due to kernel taint [ 32.328180] BUG: Bad rss-counter state mm:00000000c835cc34 type:MM_FILEPAGES val:33 [ 32.329343] BUG: Bad rss-counter state mm:00000000c835cc34 type:MM_ANONPAGES val:22 [ 32.697036] BUG: Bad rss-counter state mm:000000006e063bba type:MM_FILEPAGES val:33 [ 32.698220] BUG: Bad rss-counter state mm:000000006e063bba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28041' (ECDSA) to the list of known hosts. 2023/06/20 15:52:10 fuzzer started 2023/06/20 15:52:10 dialing manager at localhost:36067 2023/06/20 15:52:10 checking machine... 2023/06/20 15:52:10 checking revisions... [ 33.378622] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:52:11 testing simple program... [ 33.428298] cgroup: Unknown subsys name 'net' [ 33.482333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801462f8c8 RCX=0000000000000001 RDX=1ffff110028c5f24 RSI=ffff88801462fef0 RDI=ffffffff8363b743 RBP=ffff88801462f920 RSP=ffff88801462f8b0 R8 =0000000000000001 R9 =ffff88801462f908 R10=0000000000038001 R11=000000000008a95e R12=ffff88801462f990 R13=0000000000000000 R14=ffff88800dc83680 R15=0000000000092c40 RIP=ffffffff811303b2 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 00007f2afc378900 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=00007f2afc9300b0 CR3=0000000009f92000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fa96150d0c0 CR3=000000000c650000 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=5fb39d30042587b9ae4d2ca35e0d0bc7 XMM02=000000000011a438eff9b2d0a8fce9cb XMM03=000000000011a5082c67c8bc2e329bc3 XMM04=d23c5b8f9998503900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131808 XMM06=c291bd5c70af25b90000000000131690 XMM07=e042d86d42eb936e0000000000121bc8 XMM08=8c2dab067c5aca4c000000000011a508 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000