syzkaller login: [ 36.429347] BUG: Bad rss-counter state mm:00000000ae0bc220 type:MM_FILEPAGES val:33 [ 36.430823] BUG: Bad rss-counter state mm:00000000ae0bc220 type:MM_ANONPAGES val:22 [ 36.577900] ================================================================== [ 36.579004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.580118] Read of size 8 at addr ffff88801031a310 by task sshd/219 [ 36.581236] [ 36.581497] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.582538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.583614] Call Trace: [ 36.583933] <TASK> [ 36.584217] dump_stack_lvl+0x91/0xf0 [ 36.584703] print_report+0xcc/0x620 [ 36.585179] ? __virt_addr_valid+0x102/0x340 [ 36.585732] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.586350] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.586972] kasan_report+0xbe/0xf0 [ 36.587451] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.588067] vma_interval_tree_remove+0xc75/0xec0 [ 36.588660] vma_prepare+0xc54/0x11a0 [ 36.589134] __split_vma+0x5af/0x950 [ 36.589598] ? __pfx___split_vma+0x10/0x10 [ 36.590138] ? find_held_lock+0x2c/0x110 [ 36.590663] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.591225] ? lock_is_held_type+0x9f/0x120 [ 36.591753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.592359] ? mtree_range_walk+0x632/0x900 [ 36.592906] ? mas_walk+0x5c7/0x7c0 [ 36.593385] do_vmi_munmap+0x1f1/0x2b0 [ 36.593878] mmap_region+0x1f9/0x2660 [ 36.594359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.594884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.595606] ? __pfx_lock_acquire+0x10/0x10 [ 36.596144] ? __pfx_mmap_region+0x10/0x10 [ 36.596674] ? security_mmap_addr+0x7d/0xa0 [ 36.597224] ? get_unmapped_area+0x1f5/0x3f0 [ 36.597772] do_mmap+0x854/0xf00 [ 36.598212] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.598710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.599277] ksys_mmap_pgoff+0x3af/0x500 [ 36.599782] do_syscall_64+0x3f/0x90 [ 36.600255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.600895] RIP: 0033:0x7f30aea77d82 [ 36.601355] 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 [ 36.603472] RSP: 002b:00007ffda9cb13d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.604376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30aea77d82 [ 36.605217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30adeb1000 [ 36.606055] RBP: 00007f30adeb1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.606913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e5ae0cec0 [ 36.607752] R13: 00007ffda9cb13f0 R14: 00007ffda9cb1420 R15: 00007ffda9cb1780 [ 36.608604] </TASK> [ 36.608899] [ 36.609114] Allocated by task 212: [ 36.609536] kasan_save_stack+0x22/0x50 [ 36.610035] kasan_set_track+0x25/0x30 [ 36.610534] __kasan_slab_alloc+0x59/0x70 [ 36.611052] kmem_cache_alloc+0x16b/0x370 [ 36.611564] vm_area_dup+0x20/0x160 [ 36.612013] __split_vma+0x170/0x950 [ 36.612481] split_vma+0xc6/0x110 [ 36.612916] mprotect_fixup+0x8d2/0xb30 [ 36.613420] do_mprotect_pkey+0x87e/0xd40 [ 36.613935] __x64_sys_mprotect+0x78/0xc0 [ 36.614460] do_syscall_64+0x3f/0x90 [ 36.614935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.615577] [ 36.615793] Freed by task 212: [ 36.616183] kasan_save_stack+0x22/0x50 [ 36.616687] kasan_set_track+0x25/0x30 [ 36.617176] kasan_save_free_info+0x2b/0x50 [ 36.617704] __kasan_slab_free+0x10a/0x190 [ 36.618235] kmem_cache_free+0x10d/0x4d0 [ 36.618759] rcu_core+0x8c8/0x2860 [ 36.619204] __do_softirq+0x1b7/0x7d4 [ 36.619678] [ 36.619893] Last potentially related work creation: [ 36.620474] kasan_save_stack+0x22/0x50 [ 36.620982] __kasan_record_aux_stack+0x8e/0xa0 [ 36.621567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.622293] remove_vma+0x139/0x170 [ 36.622750] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.623308] do_vmi_munmap+0x1f1/0x2b0 [ 36.623790] __vm_munmap+0x138/0x3a0 [ 36.624262] __x64_sys_munmap+0x59/0x80 [ 36.624755] do_syscall_64+0x3f/0x90 [ 36.625233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.625880] [ 36.626097] The buggy address belongs to the object at ffff88801031a2b8 [ 36.626097] which belongs to the cache vm_area_struct of size 168 [ 36.627578] The buggy address is located 88 bytes inside of [ 36.627578] freed 168-byte region [ffff88801031a2b8, ffff88801031a360) [ 36.628976] [ 36.629192] The buggy address belongs to the physical page: [ 36.629850] page:00000000592d853d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1031a [ 36.630946] memcg:ffff888014628101 [ 36.631366] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.632013] page_type: 0xffffffff() [ 36.632460] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.633369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014628101 [ 36.634267] page dumped because: kasan: bad access detected [ 36.634934] [ 36.635149] Memory state around the buggy address: [ 36.635726] ffff88801031a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.636576] ffff88801031a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.637431] >ffff88801031a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.638276] ^ [ 36.638762] ffff88801031a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.639620] ffff88801031a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.640463] ================================================================== [ 36.641377] Disabling lock debugging due to kernel taint [ 38.682676] BUG: Bad rss-counter state mm:00000000c2f5ed05 type:MM_FILEPAGES val:33 [ 38.683633] BUG: Bad rss-counter state mm:00000000c2f5ed05 type:MM_ANONPAGES val:22 [ 39.226705] BUG: Bad rss-counter state mm:00000000e4fa68ea type:MM_FILEPAGES val:33 [ 39.227866] BUG: Bad rss-counter state mm:00000000e4fa68ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5741' (ECDSA) to the list of known hosts. 2023/06/20 00:00:31 fuzzer started 2023/06/20 00:00:32 dialing manager at localhost:44161 2023/06/20 00:00:32 checking machine... 2023/06/20 00:00:32 checking revisions... [ 39.845663] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:00:32 testing simple program... [ 39.891587] cgroup: Unknown subsys name 'net' [ 39.937754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:00:26 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=ffff888008c58000 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=00007f458b1c8650 CR3=0000000010090000 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=2031333a30303a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88809633d800 RCX=ffffffff811430ee RDX=ffff88800faeb680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801633d800 RSP=ffff88800fe47b68 R8 =0000000000000006 R9 =ffff88801633d800 R10=ffff88809633d800 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=ffff88801650da00 RIP=ffffffff814c01e1 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 00007f458ac13900 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=00007f458b1ca618 CR3=00000000165ee000 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