syzkaller login: [ 29.947778] BUG: Bad rss-counter state mm:00000000da79b7d5 type:MM_FILEPAGES val:33 [ 29.948612] BUG: Bad rss-counter state mm:00000000da79b7d5 type:MM_ANONPAGES val:22 [ 30.076970] ================================================================== [ 30.078592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.079235] Read of size 8 at addr ffff88801a2fe140 by task sshd/221 [ 30.079729] [ 30.079869] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.080421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.081041] Call Trace: [ 30.081298] [ 30.081696] dump_stack_lvl+0x91/0xf0 [ 30.082125] print_report+0xcc/0x620 [ 30.082446] ? __virt_addr_valid+0x102/0x340 [ 30.082808] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.083207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.083617] kasan_report+0xbe/0xf0 [ 30.083923] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.084344] vma_interval_tree_remove+0xc75/0xec0 [ 30.084739] vma_prepare+0xc54/0x11a0 [ 30.085045] __split_vma+0x5af/0x950 [ 30.085381] ? __pfx___split_vma+0x10/0x10 [ 30.085729] ? find_held_lock+0x2c/0x110 [ 30.086063] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.086425] ? lock_is_held_type+0x9f/0x120 [ 30.086777] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.087165] ? mtree_range_walk+0x632/0x900 [ 30.087520] ? mas_walk+0x5c7/0x7c0 [ 30.087823] do_vmi_munmap+0x1f1/0x2b0 [ 30.088130] mmap_region+0x1f9/0x2660 [ 30.088441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.088781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.089314] ? __pfx_lock_acquire+0x10/0x10 [ 30.089663] ? __pfx_mmap_region+0x10/0x10 [ 30.090006] ? security_mmap_addr+0x7d/0xa0 [ 30.090350] ? get_unmapped_area+0x1f5/0x3f0 [ 30.090692] do_mmap+0x854/0xf00 [ 30.090999] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.091353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.091747] ksys_mmap_pgoff+0x3af/0x500 [ 30.092101] do_syscall_64+0x3f/0x90 [ 30.092414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.092851] RIP: 0033:0x7f333d559d82 [ 30.093170] 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 [ 30.094613] RSP: 002b:00007fff19cc9208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.095264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f333d559d82 [ 30.095896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f333c993000 [ 30.096483] RBP: 00007f333c993000 R08: 0000000000000009 R09: 0000000000001000 [ 30.097028] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dcdd28ec0 [ 30.097596] R13: 00007fff19cc9220 R14: 00007fff19cc9250 R15: 00007fff19cc95b0 [ 30.098199] [ 30.098418] [ 30.098580] Allocated by task 213: [ 30.098889] kasan_save_stack+0x22/0x50 [ 30.099245] kasan_set_track+0x25/0x30 [ 30.099578] __kasan_slab_alloc+0x59/0x70 [ 30.099936] kmem_cache_alloc+0x16b/0x370 [ 30.100342] vm_area_dup+0x20/0x160 [ 30.100733] __split_vma+0x170/0x950 [ 30.101132] split_vma+0xc6/0x110 [ 30.101483] mprotect_fixup+0x8d2/0xb30 [ 30.101837] do_mprotect_pkey+0x87e/0xd40 [ 30.102163] __x64_sys_mprotect+0x78/0xc0 [ 30.102491] do_syscall_64+0x3f/0x90 [ 30.102813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103245] [ 30.103424] Freed by task 203: [ 30.103676] kasan_save_stack+0x22/0x50 [ 30.104012] kasan_set_track+0x25/0x30 [ 30.104323] kasan_save_free_info+0x2b/0x50 [ 30.104682] __kasan_slab_free+0x10a/0x190 [ 30.105015] kmem_cache_free+0x10d/0x4d0 [ 30.105369] rcu_core+0x8c8/0x2860 [ 30.105674] __do_softirq+0x1b7/0x7d4 [ 30.106033] [ 30.106180] Last potentially related work creation: [ 30.106576] kasan_save_stack+0x22/0x50 [ 30.106930] __kasan_record_aux_stack+0x8e/0xa0 [ 30.107315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.107752] remove_vma+0x139/0x170 [ 30.108059] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.108437] do_vmi_munmap+0x1f1/0x2b0 [ 30.108749] __vm_munmap+0x138/0x3a0 [ 30.109054] __x64_sys_munmap+0x59/0x80 [ 30.109452] do_syscall_64+0x3f/0x90 [ 30.109809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.110255] [ 30.110399] The buggy address belongs to the object at ffff88801a2fe0e8 [ 30.110399] which belongs to the cache vm_area_struct of size 168 [ 30.111447] The buggy address is located 88 bytes inside of [ 30.111447] freed 168-byte region [ffff88801a2fe0e8, ffff88801a2fe190) [ 30.112448] [ 30.112592] The buggy address belongs to the physical page: [ 30.113044] page:000000005d48e403 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2fe [ 30.113806] memcg:ffff88801403db01 [ 30.114084] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.114497] page_type: 0xffffffff() [ 30.114790] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.115380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801403db01 [ 30.115993] page dumped because: kasan: bad access detected [ 30.116441] [ 30.116586] Memory state around the buggy address: [ 30.116986] ffff88801a2fe000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.117592] ffff88801a2fe080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.118226] >ffff88801a2fe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.118811] ^ [ 30.119238] ffff88801a2fe180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.119815] ffff88801a2fe200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.120383] ================================================================== [ 30.121029] Disabling lock debugging due to kernel taint [ 32.067861] BUG: Bad rss-counter state mm:000000003a97501b type:MM_FILEPAGES val:33 [ 32.068559] BUG: Bad rss-counter state mm:000000003a97501b type:MM_ANONPAGES val:22 [ 32.446548] BUG: Bad rss-counter state mm:000000002f2cb3af type:MM_FILEPAGES val:33 [ 32.447289] BUG: Bad rss-counter state mm:000000002f2cb3af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63269' (ECDSA) to the list of known hosts. 2023/06/21 09:45:24 fuzzer started 2023/06/21 09:45:24 dialing manager at localhost:36067 2023/06/21 09:45:24 checking machine... 2023/06/21 09:45:24 checking revisions... [ 33.038310] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:45:24 testing simple program... [ 33.074582] cgroup: Unknown subsys name 'net' [ 33.114354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:24 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=0000000000000001 RCX=ffffffff861c71a0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801415f540 RSP=ffff88801415f478 R8 =ffffffff861c71a4 R9 =ffff88801415f528 R10=0000000000038001 R11=00000000000388b7 R12=ffff88801415f548 R13=ffff88801415f530 R14=ffff88801415f529 R15=ffff88801415f4e8 RIP=ffffffff81130ace RFL=00000293 [--S-A-C] 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 00007f95d8674700 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=00005586b9a48c70 CR3=000000000eac4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034323a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019ac2900 RCX=0000000000000000 RDX=ffff8880160d1b40 RSI=ffff88800deb3b80 RDI=ffff888019ac2900 RBP=ffff88800deb3b80 RSP=ffff888018427dd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800deb3d18 R13=ffff88800deb3bd0 R14=ffffffff836320f0 R15=ffff888019ac2900 RIP=ffffffff836320f4 RFL=00000293 [--S-A-C] 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 00007f3bbf4a4900 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=00007f3bbfa5b618 CR3=000000000ba16000 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=563412feff00545000000000000080fe 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