syzkaller login: [ 31.516859] BUG: Bad rss-counter state mm:000000008cd928d4 type:MM_FILEPAGES val:33 [ 31.517853] BUG: Bad rss-counter state mm:000000008cd928d4 type:MM_ANONPAGES val:22 [ 31.685199] ================================================================== [ 31.686090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.687017] Read of size 8 at addr ffff88800ee336b0 by task sshd/221 [ 31.687784] [ 31.688010] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.688985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.689938] Call Trace: [ 31.690261] [ 31.690545] dump_stack_lvl+0x91/0xf0 [ 31.691047] print_report+0xcc/0x620 [ 31.691530] ? __virt_addr_valid+0x102/0x340 [ 31.692086] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.693343] kasan_report+0xbe/0xf0 [ 31.693860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694518] vma_interval_tree_remove+0xc75/0xec0 [ 31.695160] vma_prepare+0xc54/0x11a0 [ 31.695682] __split_vma+0x5af/0x950 [ 31.696191] ? __pfx___split_vma+0x10/0x10 [ 31.696787] ? find_held_lock+0x2c/0x110 [ 31.697407] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.698080] ? lock_is_held_type+0x9f/0x120 [ 31.698734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.699470] ? mtree_range_walk+0x632/0x900 [ 31.700144] ? mas_walk+0x5c7/0x7c0 [ 31.700738] do_vmi_munmap+0x1f1/0x2b0 [ 31.701335] mmap_region+0x1f9/0x2660 [ 31.701923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.702458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.703134] ? __pfx_lock_acquire+0x10/0x10 [ 31.703633] ? __pfx_mmap_region+0x10/0x10 [ 31.704140] ? security_mmap_addr+0x7d/0xa0 [ 31.704665] ? get_unmapped_area+0x1f5/0x3f0 [ 31.705184] do_mmap+0x854/0xf00 [ 31.705602] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.706068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.706601] ksys_mmap_pgoff+0x3af/0x500 [ 31.707078] do_syscall_64+0x3f/0x90 [ 31.707531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.708139] RIP: 0033:0x7f0503d62d82 [ 31.708574] 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 [ 31.710582] RSP: 002b:00007fff09e47648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.711529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0503d62d82 [ 31.712460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f050319c000 [ 31.713371] RBP: 00007f050319c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.714281] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a90613d90 [ 31.715202] R13: 00007fff09e47660 R14: 00007fff09e47690 R15: 00007fff09e479f0 [ 31.716133] [ 31.716462] [ 31.716697] Allocated by task 214: [ 31.717171] kasan_save_stack+0x22/0x50 [ 31.717714] kasan_set_track+0x25/0x30 [ 31.718247] __kasan_slab_alloc+0x59/0x70 [ 31.718815] kmem_cache_alloc+0x16b/0x370 [ 31.719366] vm_area_dup+0x20/0x160 [ 31.719858] __split_vma+0x170/0x950 [ 31.720372] split_vma+0xc6/0x110 [ 31.720843] mprotect_fixup+0x8d2/0xb30 [ 31.721388] do_mprotect_pkey+0x87e/0xd40 [ 31.721958] __x64_sys_mprotect+0x78/0xc0 [ 31.722532] do_syscall_64+0x3f/0x90 [ 31.723050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723750] [ 31.723992] Freed by task 214: [ 31.724456] kasan_save_stack+0x22/0x50 [ 31.725000] kasan_set_track+0x25/0x30 [ 31.725542] kasan_save_free_info+0x2b/0x50 [ 31.726125] __kasan_slab_free+0x10a/0x190 [ 31.726712] kmem_cache_free+0x10d/0x4d0 [ 31.727267] rcu_core+0x8c8/0x2860 [ 31.727757] __do_softirq+0x1b7/0x7d4 [ 31.728298] [ 31.728538] Last potentially related work creation: [ 31.729185] kasan_save_stack+0x22/0x50 [ 31.729733] __kasan_record_aux_stack+0x8e/0xa0 [ 31.730357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.731066] remove_vma+0x139/0x170 [ 31.731559] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.732177] do_vmi_munmap+0x1f1/0x2b0 [ 31.732737] __vm_munmap+0x138/0x3a0 [ 31.733238] __x64_sys_munmap+0x59/0x80 [ 31.733774] do_syscall_64+0x3f/0x90 [ 31.734269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734977] [ 31.735198] The buggy address belongs to the object at ffff88800ee33658 [ 31.735198] which belongs to the cache vm_area_struct of size 168 [ 31.736790] The buggy address is located 88 bytes inside of [ 31.736790] freed 168-byte region [ffff88800ee33658, ffff88800ee33700) [ 31.738305] [ 31.738539] The buggy address belongs to the physical page: [ 31.739255] page:00000000b810a5f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee33 [ 31.740440] memcg:ffff88800fbaa201 [ 31.740900] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.741566] page_type: 0xffffffff() [ 31.742049] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.743031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbaa201 [ 31.743997] page dumped because: kasan: bad access detected [ 31.744715] [ 31.744947] Memory state around the buggy address: [ 31.745587] ffff88800ee33580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.746522] ffff88800ee33600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.747418] >ffff88800ee33680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.748360] ^ [ 31.748999] ffff88800ee33700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.749917] ffff88800ee33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.750828] ================================================================== [ 31.751992] Disabling lock debugging due to kernel taint [ 33.691661] BUG: Bad rss-counter state mm:000000003c6b2066 type:MM_FILEPAGES val:33 [ 33.693000] BUG: Bad rss-counter state mm:000000003c6b2066 type:MM_ANONPAGES val:22 [ 34.153407] BUG: Bad rss-counter state mm:000000001d97f959 type:MM_FILEPAGES val:33 [ 34.154541] BUG: Bad rss-counter state mm:000000001d97f959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64146' (ECDSA) to the list of known hosts. 2023/06/20 20:08:55 fuzzer started 2023/06/20 20:08:55 dialing manager at localhost:36067 2023/06/20 20:08:55 checking machine... 2023/06/20 20:08:55 checking revisions... [ 34.900372] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:08:55 testing simple program... [ 34.945180] cgroup: Unknown subsys name 'net' [ 34.997768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:08:55 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=00007f3f1e434e20 CR3=0000000019eb8000 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=2034353a38303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016f0a240 RCX=ffff888016f0a240 RDX=00000000802a0024 RSI=ffff888016f0a240 RDI=ffff8880087a03c0 RBP=ffff88801c967778 RSP=ffff88801c9676e0 R8 =00000000802a0023 R9 =0000000000000000 R10=ffffea00005bc280 R11=00000000802a0024 R12=ffffea00005bc280 R13=ffff888016f0a1e0 R14=00000000802a0023 R15=ffff8880087a03c0 RIP=ffffffff81809672 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 00007feca8285900 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=00007ffe4a5bc000 CR3=0000000016a82000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000