syzkaller login: [ 31.218636] BUG: Bad rss-counter state mm:000000001b1f7a82 type:MM_FILEPAGES val:33 [ 31.219993] BUG: Bad rss-counter state mm:000000001b1f7a82 type:MM_ANONPAGES val:22 [ 31.386428] ================================================================== [ 31.387357] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.388319] Read of size 8 at addr ffff88801681f310 by task sshd/221 [ 31.389095] [ 31.389315] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.390311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.391285] Call Trace: [ 31.391617] [ 31.391911] dump_stack_lvl+0x91/0xf0 [ 31.392414] print_report+0xcc/0x620 [ 31.392893] ? __virt_addr_valid+0x102/0x340 [ 31.393438] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.394056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.394677] kasan_report+0xbe/0xf0 [ 31.395156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395785] vma_interval_tree_remove+0xc75/0xec0 [ 31.396410] vma_prepare+0xc54/0x11a0 [ 31.396883] __split_vma+0x5af/0x950 [ 31.397354] ? __pfx___split_vma+0x10/0x10 [ 31.397882] ? find_held_lock+0x2c/0x110 [ 31.398397] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.398961] ? lock_is_held_type+0x9f/0x120 [ 31.399495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.400127] ? mtree_range_walk+0x632/0x900 [ 31.400689] ? mas_walk+0x5c7/0x7c0 [ 31.401166] do_vmi_munmap+0x1f1/0x2b0 [ 31.401663] mmap_region+0x1f9/0x2660 [ 31.402152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.402659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.403366] ? __pfx_lock_acquire+0x10/0x10 [ 31.403917] ? __pfx_mmap_region+0x10/0x10 [ 31.404449] ? security_mmap_addr+0x7d/0xa0 [ 31.404976] ? get_unmapped_area+0x1f5/0x3f0 [ 31.405522] do_mmap+0x854/0xf00 [ 31.405964] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.406458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.407022] ksys_mmap_pgoff+0x3af/0x500 [ 31.407524] do_syscall_64+0x3f/0x90 [ 31.408027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408674] RIP: 0033:0x7f021de10d82 [ 31.409133] 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 [ 31.411242] RSP: 002b:00007ffc33dd69d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.412161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f021de10d82 [ 31.413012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f021d24a000 [ 31.413854] RBP: 00007f021d24a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.414697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055678742fec0 [ 31.415540] R13: 00007ffc33dd69f0 R14: 00007ffc33dd6a20 R15: 00007ffc33dd6d80 [ 31.416403] [ 31.416697] [ 31.416914] Allocated by task 214: [ 31.417335] kasan_save_stack+0x22/0x50 [ 31.417833] kasan_set_track+0x25/0x30 [ 31.418326] __kasan_slab_alloc+0x59/0x70 [ 31.418849] kmem_cache_alloc+0x16b/0x370 [ 31.419365] vm_area_dup+0x20/0x160 [ 31.419828] __split_vma+0x170/0x950 [ 31.420316] split_vma+0xc6/0x110 [ 31.420757] mprotect_fixup+0x8d2/0xb30 [ 31.421263] do_mprotect_pkey+0x87e/0xd40 [ 31.421791] __x64_sys_mprotect+0x78/0xc0 [ 31.422314] do_syscall_64+0x3f/0x90 [ 31.422786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423434] [ 31.423653] Freed by task 214: [ 31.424061] kasan_save_stack+0x22/0x50 [ 31.424564] kasan_set_track+0x25/0x30 [ 31.425062] kasan_save_free_info+0x2b/0x50 [ 31.425598] __kasan_slab_free+0x10a/0x190 [ 31.426131] kmem_cache_free+0x10d/0x4d0 [ 31.426646] rcu_core+0x8c8/0x2860 [ 31.427098] __do_softirq+0x1b7/0x7d4 [ 31.427568] [ 31.427785] Last potentially related work creation: [ 31.428373] kasan_save_stack+0x22/0x50 [ 31.428881] __kasan_record_aux_stack+0x8e/0xa0 [ 31.429458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.430100] remove_vma+0x139/0x170 [ 31.430553] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.431200] do_vmi_munmap+0x1f1/0x2b0 [ 31.431684] __vm_munmap+0x138/0x3a0 [ 31.432169] __x64_sys_munmap+0x59/0x80 [ 31.432668] do_syscall_64+0x3f/0x90 [ 31.433144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433788] [ 31.434005] The buggy address belongs to the object at ffff88801681f2b8 [ 31.434005] which belongs to the cache vm_area_struct of size 168 [ 31.435498] The buggy address is located 88 bytes inside of [ 31.435498] freed 168-byte region [ffff88801681f2b8, ffff88801681f360) [ 31.436898] [ 31.437111] The buggy address belongs to the physical page: [ 31.437767] page:000000007959dd5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1681f [ 31.438859] memcg:ffff888014720801 [ 31.439284] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.439935] page_type: 0xffffffff() [ 31.440392] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.441305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014720801 [ 31.442206] page dumped because: kasan: bad access detected [ 31.442870] [ 31.443085] Memory state around the buggy address: [ 31.443663] ffff88801681f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.444523] ffff88801681f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.445383] >ffff88801681f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.446232] ^ [ 31.446696] ffff88801681f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.447555] ffff88801681f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.448424] ================================================================== [ 31.449505] Disabling lock debugging due to kernel taint [ 33.790800] BUG: Bad rss-counter state mm:000000002ddcc8b1 type:MM_FILEPAGES val:33 [ 33.792328] BUG: Bad rss-counter state mm:000000002ddcc8b1 type:MM_ANONPAGES val:22 [ 34.344459] BUG: Bad rss-counter state mm:0000000007b8c358 type:MM_FILEPAGES val:33 [ 34.345702] BUG: Bad rss-counter state mm:0000000007b8c358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52363' (ECDSA) to the list of known hosts. 2023/06/20 16:24:57 fuzzer started 2023/06/20 16:24:57 dialing manager at localhost:36067 2023/06/20 16:24:57 checking machine... 2023/06/20 16:24:57 checking revisions... [ 34.977747] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:24:57 testing simple program... [ 35.017188] cgroup: Unknown subsys name 'net' [ 35.061170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:24:57 Registers: info registers vcpu 0 RAX=1ffff11002788543 RBX=ffff888013c429e8 RCX=1ffff110026f556a RDX=dffffc0000000000 RSI=ffff88801b804728 RDI=ffff888013c42a18 RBP=ffff8880137aab20 RSP=ffff8880146e7668 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801b804640 R13=0000000000000000 R14=ffff88800ef2b178 R15=ffff88800ef2b130 RIP=ffffffff8184767e RFL=00000046 [---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 00007fd0060d0900 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=00007f103371f650 CR3=0000000009618000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=4fea5815d6ef3daa00000000000ae988 XMM05=72ab0a72e93b78e60000000000132cf0 XMM06=c291bd5c70af25b90000000000131ae0 XMM07=fb795ef6d65770560000000000121d90 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe6836a508 CR3=000000000e6aa000 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=2036353a34323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000