syzkaller login: [ 38.220154] BUG: Bad rss-counter state mm:000000000680353d type:MM_FILEPAGES val:33 [ 38.221787] BUG: Bad rss-counter state mm:000000000680353d type:MM_ANONPAGES val:22 [ 38.388585] ================================================================== [ 38.389744] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.391047] Read of size 8 at addr ffff8880165c0d08 by task sshd/221 [ 38.391947] [ 38.392183] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.393092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.394111] Call Trace: [ 38.394441] [ 38.394743] dump_stack_lvl+0x91/0xf0 [ 38.395258] print_report+0xcc/0x620 [ 38.395765] ? __virt_addr_valid+0x102/0x340 [ 38.396349] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.397013] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.397665] kasan_report+0xbe/0xf0 [ 38.398173] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.398826] vma_interval_tree_remove+0xc75/0xec0 [ 38.399462] vma_prepare+0xc54/0x11a0 [ 38.399965] __split_vma+0x5af/0x950 [ 38.400458] ? __pfx___split_vma+0x10/0x10 [ 38.401031] ? find_held_lock+0x2c/0x110 [ 38.401575] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.402168] ? lock_is_held_type+0x9f/0x120 [ 38.402730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.403374] ? mtree_range_walk+0x632/0x900 [ 38.403955] ? mas_walk+0x5c7/0x7c0 [ 38.404454] do_vmi_munmap+0x1f1/0x2b0 [ 38.404987] mmap_region+0x1f9/0x2660 [ 38.405493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.406034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.406790] ? __pfx_lock_acquire+0x10/0x10 [ 38.407350] ? __pfx_mmap_region+0x10/0x10 [ 38.407905] ? security_mmap_addr+0x7d/0xa0 [ 38.408471] ? get_unmapped_area+0x1f5/0x3f0 [ 38.409073] do_mmap+0x854/0xf00 [ 38.409542] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.410073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.410717] ksys_mmap_pgoff+0x3af/0x500 [ 38.411268] do_syscall_64+0x3f/0x90 [ 38.411783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.412492] RIP: 0033:0x7f4b9d330d82 [ 38.412990] 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 [ 38.415257] RSP: 002b:00007ffd86b760b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.416223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b9d330d82 [ 38.417145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b9c76a000 [ 38.418044] RBP: 00007f4b9c76a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.418950] R10: 0000000000000812 R11: 0000000000000206 R12: 000056523cb7cec0 [ 38.419869] R13: 00007ffd86b760d0 R14: 00007ffd86b76100 R15: 00007ffd86b76460 [ 38.420803] [ 38.421131] [ 38.421364] Allocated by task 214: [ 38.421827] kasan_save_stack+0x22/0x50 [ 38.422365] kasan_set_track+0x25/0x30 [ 38.422893] __kasan_slab_alloc+0x59/0x70 [ 38.423448] kmem_cache_alloc+0x16b/0x370 [ 38.423980] vm_area_dup+0x20/0x160 [ 38.424479] __split_vma+0x170/0x950 [ 38.425000] split_vma+0xc6/0x110 [ 38.425460] mprotect_fixup+0x8d2/0xb30 [ 38.426010] do_mprotect_pkey+0x87e/0xd40 [ 38.426567] __x64_sys_mprotect+0x78/0xc0 [ 38.427132] do_syscall_64+0x3f/0x90 [ 38.427638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.428309] [ 38.428534] Freed by task 214: [ 38.428989] kasan_save_stack+0x22/0x50 [ 38.429541] kasan_set_track+0x25/0x30 [ 38.430069] kasan_save_free_info+0x2b/0x50 [ 38.430648] __kasan_slab_free+0x10a/0x190 [ 38.431218] kmem_cache_free+0x10d/0x4d0 [ 38.431754] rcu_core+0x8c8/0x2860 [ 38.432225] __do_softirq+0x1b7/0x7d4 [ 38.432739] [ 38.432966] Last potentially related work creation: [ 38.433593] kasan_save_stack+0x22/0x50 [ 38.434130] __kasan_record_aux_stack+0x8e/0xa0 [ 38.434739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.435422] remove_vma+0x139/0x170 [ 38.435904] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.436490] do_vmi_munmap+0x1f1/0x2b0 [ 38.437026] __vm_munmap+0x138/0x3a0 [ 38.437521] __x64_sys_munmap+0x59/0x80 [ 38.438050] do_syscall_64+0x3f/0x90 [ 38.438555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.439234] [ 38.439467] The buggy address belongs to the object at ffff8880165c0cb0 [ 38.439467] which belongs to the cache vm_area_struct of size 168 [ 38.441034] The buggy address is located 88 bytes inside of [ 38.441034] freed 168-byte region [ffff8880165c0cb0, ffff8880165c0d58) [ 38.442527] [ 38.442755] The buggy address belongs to the physical page: [ 38.443459] page:00000000ebf19e51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165c0 [ 38.444624] memcg:ffff888015a5d101 [ 38.445133] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.445820] page_type: 0xffffffff() [ 38.446299] raw: 0100000000000200 ffff88800879fc80 ffffea00003b17c0 dead000000000002 [ 38.447282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a5d101 [ 38.448250] page dumped because: kasan: bad access detected [ 38.448959] [ 38.449196] Memory state around the buggy address: [ 38.449816] ffff8880165c0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.450726] ffff8880165c0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.451638] >ffff8880165c0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.452567] ^ [ 38.453039] ffff8880165c0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.453982] ffff8880165c0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.454886] ================================================================== [ 38.455935] Disabling lock debugging due to kernel taint [ 40.316355] BUG: Bad rss-counter state mm:0000000011c3acdc type:MM_FILEPAGES val:33 [ 40.317357] BUG: Bad rss-counter state mm:0000000011c3acdc type:MM_ANONPAGES val:22 [ 40.810284] BUG: Bad rss-counter state mm:0000000033d651a0 type:MM_FILEPAGES val:33 [ 40.811513] BUG: Bad rss-counter state mm:0000000033d651a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6594' (ECDSA) to the list of known hosts. 2023/06/19 16:54:37 fuzzer started 2023/06/19 16:54:38 dialing manager at localhost:44161 2023/06/19 16:54:38 checking machine... 2023/06/19 16:54:38 checking revisions... [ 41.546360] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:54:38 testing simple program... [ 41.601662] cgroup: Unknown subsys name 'net' [ 41.638768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:54:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f1f0b4b4c00 CR3=0000000013a96000 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=3529f73b47287ebe5d4ab946963b36e5 XMM02=2c67c8bc2e329bc3000000000011d268 XMM03=fb795ef6d65770560000000000124728 XMM04=bd1af7e2da055a0100000000000ae988 XMM05=e4cb8bb95a7664b600000000001342a8 XMM06=37f7138236185b3e0000000000133110 XMM07=e042d86d42eb936e00000000001249a8 XMM08=a5990c371aa49880000000000011d2c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff83874f32 RDX=0000000000000001 RSI=ffffffff863dcb36 RDI=ffffffff85fc0370 RBP=ffff88801666f400 RSP=ffff88801666f300 R8 =ffffffff863dcb36 R9 =ffff88801666f3e8 R10=0000000000038001 R11=0000000000091be7 R12=ffffffff85fc0370 R13=ffff88801666f3f0 R14=ffff88801666f3e9 R15=ffff88801666f3a8 RIP=ffffffff8112fc21 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 00007ff67c64e900 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=00007fff63666000 CR3=000000000ef22000 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=6720646572637465733a4d41503d706f 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