syzkaller login: [ 31.223207] BUG: Bad rss-counter state mm:0000000053b8b33a type:MM_FILEPAGES val:33 [ 31.224826] BUG: Bad rss-counter state mm:0000000053b8b33a type:MM_ANONPAGES val:22 [ 31.416766] ================================================================== [ 31.417760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.418781] Read of size 8 at addr ffff888016287c20 by task sshd/219 [ 31.419709] [ 31.419949] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.420878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.421961] Call Trace: [ 31.422303] [ 31.422640] dump_stack_lvl+0x91/0xf0 [ 31.423178] print_report+0xcc/0x620 [ 31.423701] ? __virt_addr_valid+0x102/0x340 [ 31.424302] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.424977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.425643] kasan_report+0xbe/0xf0 [ 31.426164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.426842] vma_interval_tree_remove+0xc75/0xec0 [ 31.427494] vma_prepare+0xc54/0x11a0 [ 31.428016] __split_vma+0x5af/0x950 [ 31.428558] ? __pfx___split_vma+0x10/0x10 [ 31.429168] ? find_held_lock+0x2c/0x110 [ 31.429780] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.430431] ? lock_is_held_type+0x9f/0x120 [ 31.431094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.431808] ? mtree_range_walk+0x632/0x900 [ 31.432436] ? mas_walk+0x5c7/0x7c0 [ 31.432991] do_vmi_munmap+0x1f1/0x2b0 [ 31.433554] mmap_region+0x1f9/0x2660 [ 31.434104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.434711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.435532] ? __pfx_lock_acquire+0x10/0x10 [ 31.436157] ? __pfx_mmap_region+0x10/0x10 [ 31.436765] ? security_mmap_addr+0x7d/0xa0 [ 31.437389] ? get_unmapped_area+0x1f5/0x3f0 [ 31.438027] do_mmap+0x854/0xf00 [ 31.438543] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.439118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.439777] ksys_mmap_pgoff+0x3af/0x500 [ 31.440347] do_syscall_64+0x3f/0x90 [ 31.440896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441645] RIP: 0033:0x7f428878dd82 [ 31.442165] 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 [ 31.444635] RSP: 002b:00007ffd98ffbd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.445655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f428878dd82 [ 31.446639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4287bc7000 [ 31.447615] RBP: 00007f4287bc7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.448590] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed70253ec0 [ 31.449563] R13: 00007ffd98ffbda0 R14: 00007ffd98ffbdd0 R15: 00007ffd98ffc130 [ 31.450580] [ 31.450919] [ 31.451172] Allocated by task 212: [ 31.451675] kasan_save_stack+0x22/0x50 [ 31.452261] kasan_set_track+0x25/0x30 [ 31.452828] __kasan_slab_alloc+0x59/0x70 [ 31.453434] kmem_cache_alloc+0x16b/0x370 [ 31.454015] vm_area_dup+0x20/0x160 [ 31.454552] __split_vma+0x170/0x950 [ 31.455067] split_vma+0xc6/0x110 [ 31.455572] mprotect_fixup+0x8d2/0xb30 [ 31.456131] do_mprotect_pkey+0x87e/0xd40 [ 31.456731] __x64_sys_mprotect+0x78/0xc0 [ 31.457319] do_syscall_64+0x3f/0x90 [ 31.457857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.458600] [ 31.458847] Freed by task 202: [ 31.459296] kasan_save_stack+0x22/0x50 [ 31.459875] kasan_set_track+0x25/0x30 [ 31.460439] kasan_save_free_info+0x2b/0x50 [ 31.461050] __kasan_slab_free+0x10a/0x190 [ 31.461655] kmem_cache_free+0x10d/0x4d0 [ 31.462236] rcu_core+0x8c8/0x2860 [ 31.462764] __do_softirq+0x1b7/0x7d4 [ 31.463306] [ 31.463552] Last potentially related work creation: [ 31.464229] kasan_save_stack+0x22/0x50 [ 31.464794] __kasan_record_aux_stack+0x8e/0xa0 [ 31.465449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.466192] remove_vma+0x139/0x170 [ 31.466729] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.467346] do_vmi_munmap+0x1f1/0x2b0 [ 31.467888] __vm_munmap+0x138/0x3a0 [ 31.468409] __x64_sys_munmap+0x59/0x80 [ 31.468974] do_syscall_64+0x3f/0x90 [ 31.469513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.470255] [ 31.470513] The buggy address belongs to the object at ffff888016287bc8 [ 31.470513] which belongs to the cache vm_area_struct of size 168 [ 31.472169] The buggy address is located 88 bytes inside of [ 31.472169] freed 168-byte region [ffff888016287bc8, ffff888016287c70) [ 31.473771] [ 31.474014] The buggy address belongs to the physical page: [ 31.474789] page:00000000df6623a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16287 [ 31.476015] memcg:ffff888009707a01 [ 31.476504] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.477235] page_type: 0xffffffff() [ 31.477744] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.478800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009707a01 [ 31.479803] page dumped because: kasan: bad access detected [ 31.480551] [ 31.480798] Memory state around the buggy address: [ 31.481460] ffff888016287b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.482429] ffff888016287b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.483412] >ffff888016287c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.484392] ^ [ 31.484998] ffff888016287c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.485967] ffff888016287d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.486943] ================================================================== [ 31.488149] Disabling lock debugging due to kernel taint [ 33.486383] BUG: Bad rss-counter state mm:000000003dce355e type:MM_FILEPAGES val:33 [ 33.487603] BUG: Bad rss-counter state mm:000000003dce355e type:MM_ANONPAGES val:22 [ 33.918622] BUG: Bad rss-counter state mm:00000000a4acb15a type:MM_FILEPAGES val:33 [ 33.919774] BUG: Bad rss-counter state mm:00000000a4acb15a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44767' (ECDSA) to the list of known hosts. 2023/06/20 03:59:44 fuzzer started 2023/06/20 03:59:44 dialing manager at localhost:44161 2023/06/20 03:59:44 checking machine... 2023/06/20 03:59:44 checking revisions... [ 34.624370] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:59:44 testing simple program... [ 34.668855] cgroup: Unknown subsys name 'net' [ 34.722597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=000000000000004c RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83664ebe RDI=ffff88800d761484 RBP=ffff88800d7613c0 RSP=ffff88800fc5f318 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000014 R13=ffff888016370038 R14=0000000000000000 R15=0000000000000e88 RIP=ffffffff83664f0c RFL=00000217 [----APC] 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 00007f583d016900 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=00007f583d5cd618 CR3=000000000eed0000 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=2033343a39353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fab5db0dc10 CR3=00000000145c8000 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=267d513e881ed795324511fc29ca319a XMM02=ec2efd57dc4c00df000000000011cd58 XMM03=c6627659a367e6f8000000000011ce28 XMM04=6ec7e120524ae00a00000000000ae988 XMM05=dfcdbad4f1609c370000000000134298 XMM06=33caaff793841a240000000000133100 XMM07=e042d86d42eb936e0000000000124990 XMM08=c6627659a367e6f8000000000011ce28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000