syzkaller login: [ 36.162822] BUG: Bad rss-counter state mm:00000000482461d1 type:MM_FILEPAGES val:33 [ 36.164230] BUG: Bad rss-counter state mm:00000000482461d1 type:MM_ANONPAGES val:22 [ 36.266081] ================================================================== [ 36.266804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.267530] Read of size 8 at addr ffff88801672e880 by task sshd/226 [ 36.268116] [ 36.268286] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.268962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.269838] Call Trace: [ 36.270089] [ 36.270308] dump_stack_lvl+0x91/0xf0 [ 36.270694] print_report+0xcc/0x620 [ 36.271068] ? __virt_addr_valid+0x102/0x340 [ 36.271513] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.271989] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.272483] kasan_report+0xbe/0xf0 [ 36.272854] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.273345] vma_interval_tree_remove+0xc75/0xec0 [ 36.273717] vma_prepare+0xc54/0x11a0 [ 36.273980] __split_vma+0x5af/0x950 [ 36.274238] ? __pfx___split_vma+0x10/0x10 [ 36.274527] ? find_held_lock+0x2c/0x110 [ 36.274819] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.275126] ? lock_is_held_type+0x9f/0x120 [ 36.275443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.275798] ? mtree_range_walk+0x632/0x900 [ 36.276124] ? mas_walk+0x5c7/0x7c0 [ 36.276406] do_vmi_munmap+0x1f1/0x2b0 [ 36.276702] mmap_region+0x1f9/0x2660 [ 36.276984] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.277286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.277715] ? __pfx_lock_acquire+0x10/0x10 [ 36.278029] ? __pfx_mmap_region+0x10/0x10 [ 36.278338] ? security_mmap_addr+0x7d/0xa0 [ 36.278657] ? get_unmapped_area+0x1f5/0x3f0 [ 36.278984] do_mmap+0x854/0xf00 [ 36.279248] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.279541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.279877] ksys_mmap_pgoff+0x3af/0x500 [ 36.280173] do_syscall_64+0x3f/0x90 [ 36.280460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.280852] RIP: 0033:0x7f481e952d82 [ 36.281128] 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 [ 36.282395] RSP: 002b:00007ffdb578bc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.282938] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f481e952d82 [ 36.283446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f481dd8c000 [ 36.283951] RBP: 00007f481dd8c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.284463] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579d02a7ec0 [ 36.284971] R13: 00007ffdb578bc80 R14: 00007ffdb578bcb0 R15: 00007ffdb578c010 [ 36.285474] [ 36.285646] [ 36.285769] Allocated by task 219: [ 36.286026] kasan_save_stack+0x22/0x50 [ 36.286321] kasan_set_track+0x25/0x30 [ 36.286610] __kasan_slab_alloc+0x59/0x70 [ 36.286912] kmem_cache_alloc+0x16b/0x370 [ 36.287219] vm_area_dup+0x20/0x160 [ 36.287488] __split_vma+0x170/0x950 [ 36.287763] split_vma+0xc6/0x110 [ 36.288023] mprotect_fixup+0x8d2/0xb30 [ 36.288324] do_mprotect_pkey+0x87e/0xd40 [ 36.288638] __x64_sys_mprotect+0x78/0xc0 [ 36.288944] do_syscall_64+0x3f/0x90 [ 36.289221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.289595] [ 36.289724] Freed by task 13: [ 36.289948] kasan_save_stack+0x22/0x50 [ 36.290245] kasan_set_track+0x25/0x30 [ 36.290539] kasan_save_free_info+0x2b/0x50 [ 36.290858] __kasan_slab_free+0x10a/0x190 [ 36.291166] kmem_cache_free+0x10d/0x4d0 [ 36.291467] rcu_core+0x8c8/0x2860 [ 36.291729] __do_softirq+0x1b7/0x7d4 [ 36.292015] [ 36.292140] Last potentially related work creation: [ 36.292494] kasan_save_stack+0x22/0x50 [ 36.292795] __kasan_record_aux_stack+0x8e/0xa0 [ 36.293134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.293512] remove_vma+0x139/0x170 [ 36.293783] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.294108] do_vmi_munmap+0x1f1/0x2b0 [ 36.294387] __vm_munmap+0x138/0x3a0 [ 36.294663] __x64_sys_munmap+0x59/0x80 [ 36.294945] do_syscall_64+0x3f/0x90 [ 36.295223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.295608] [ 36.295733] The buggy address belongs to the object at ffff88801672e828 [ 36.295733] which belongs to the cache vm_area_struct of size 168 [ 36.296606] The buggy address is located 88 bytes inside of [ 36.296606] freed 168-byte region [ffff88801672e828, ffff88801672e8d0) [ 36.297444] [ 36.297571] The buggy address belongs to the physical page: [ 36.297975] page:00000000746d1667 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1672e [ 36.298632] memcg:ffff888016d64e01 [ 36.298881] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.299269] page_type: 0xffffffff() [ 36.299538] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.300087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d64e01 [ 36.300630] page dumped because: kasan: bad access detected [ 36.301025] [ 36.301151] Memory state around the buggy address: [ 36.301502] ffff88801672e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.302002] ffff88801672e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.302508] >ffff88801672e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.303009] ^ [ 36.303248] ffff88801672e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.303761] ffff88801672e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.304262] ================================================================== [ 36.305063] Disabling lock debugging due to kernel taint [ 38.473488] BUG: Bad rss-counter state mm:00000000b3a3e36a type:MM_FILEPAGES val:33 [ 38.474466] BUG: Bad rss-counter state mm:00000000b3a3e36a type:MM_ANONPAGES val:22 [ 38.951768] BUG: Bad rss-counter state mm:0000000060fad8d3 type:MM_FILEPAGES val:33 [ 38.952881] BUG: Bad rss-counter state mm:0000000060fad8d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20552' (ECDSA) to the list of known hosts. 2023/06/21 02:06:46 fuzzer started 2023/06/21 02:06:46 dialing manager at localhost:36067 2023/06/21 02:06:46 checking machine... 2023/06/21 02:06:46 checking revisions... [ 39.678915] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:06:46 testing simple program... [ 39.728859] cgroup: Unknown subsys name 'net' [ 39.781359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:06:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffef324798 CR3=000000000cbf8000 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=36303a3230203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3533325b646873732036343a3630 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323236 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=ffff888009b22038 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800ff0f4f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000bc300000bc3 R12=0000000000000000 R13=0000000000000007 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff84511dc0 RFL=00000282 [--S----] 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 00007f0492cda900 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=00007f0493291618 CR3=000000001a138000 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=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