syzkaller login: [ 30.680558] BUG: Bad rss-counter state mm:000000009e62ab20 type:MM_FILEPAGES val:33 [ 30.681874] BUG: Bad rss-counter state mm:000000009e62ab20 type:MM_ANONPAGES val:22 [ 30.846595] ================================================================== [ 30.847547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848499] Read of size 8 at addr ffff888018fb0310 by task sshd/221 [ 30.849276] [ 30.849563] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851485] Call Trace: [ 30.851811] [ 30.852092] dump_stack_lvl+0x91/0xf0 [ 30.852610] print_report+0xcc/0x620 [ 30.853109] ? __virt_addr_valid+0x102/0x340 [ 30.853666] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854944] kasan_report+0xbe/0xf0 [ 30.855449] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856096] vma_interval_tree_remove+0xc75/0xec0 [ 30.856709] vma_prepare+0xc54/0x11a0 [ 30.857191] __split_vma+0x5af/0x950 [ 30.857655] ? __pfx___split_vma+0x10/0x10 [ 30.858175] ? find_held_lock+0x2c/0x110 [ 30.858690] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859265] ? lock_is_held_type+0x9f/0x120 [ 30.859804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860438] ? mtree_range_walk+0x632/0x900 [ 30.861005] ? mas_walk+0x5c7/0x7c0 [ 30.861493] do_vmi_munmap+0x1f1/0x2b0 [ 30.862009] mmap_region+0x1f9/0x2660 [ 30.862511] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863739] ? __pfx_lock_acquire+0x10/0x10 [ 30.864295] ? __pfx_mmap_region+0x10/0x10 [ 30.864839] ? security_mmap_addr+0x7d/0xa0 [ 30.865392] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865933] do_mmap+0x854/0xf00 [ 30.866366] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.866872] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867435] ksys_mmap_pgoff+0x3af/0x500 [ 30.867942] do_syscall_64+0x3f/0x90 [ 30.868418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869068] RIP: 0033:0x7ffb43b46d82 [ 30.869520] 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 [ 30.871632] RSP: 002b:00007fffce65bdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.872536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb43b46d82 [ 30.873380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb42f80000 [ 30.874225] RBP: 00007ffb42f80000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875085] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb26db0d90 [ 30.875928] R13: 00007fffce65be10 R14: 00007fffce65be40 R15: 00007fffce65c1a0 [ 30.876786] [ 30.877075] [ 30.877294] Allocated by task 214: [ 30.877720] kasan_save_stack+0x22/0x50 [ 30.878220] kasan_set_track+0x25/0x30 [ 30.878711] __kasan_slab_alloc+0x59/0x70 [ 30.879240] kmem_cache_alloc+0x16b/0x370 [ 30.879758] vm_area_dup+0x20/0x160 [ 30.880208] __split_vma+0x170/0x950 [ 30.880668] split_vma+0xc6/0x110 [ 30.881105] mprotect_fixup+0x8d2/0xb30 [ 30.881613] do_mprotect_pkey+0x87e/0xd40 [ 30.882125] __x64_sys_mprotect+0x78/0xc0 [ 30.882637] do_syscall_64+0x3f/0x90 [ 30.883127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883763] [ 30.883977] Freed by task 214: [ 30.884371] kasan_save_stack+0x22/0x50 [ 30.884877] kasan_set_track+0x25/0x30 [ 30.885367] kasan_save_free_info+0x2b/0x50 [ 30.885898] __kasan_slab_free+0x10a/0x190 [ 30.886426] kmem_cache_free+0x10d/0x4d0 [ 30.886939] rcu_core+0x8c8/0x2860 [ 30.887383] __do_softirq+0x1b7/0x7d4 [ 30.887863] [ 30.888078] Last potentially related work creation: [ 30.888664] kasan_save_stack+0x22/0x50 [ 30.889162] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890360] remove_vma+0x139/0x170 [ 30.890823] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891385] do_vmi_munmap+0x1f1/0x2b0 [ 30.891871] __vm_munmap+0x138/0x3a0 [ 30.892332] __x64_sys_munmap+0x59/0x80 [ 30.892822] do_syscall_64+0x3f/0x90 [ 30.893296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893931] [ 30.894145] The buggy address belongs to the object at ffff888018fb02b8 [ 30.894145] which belongs to the cache vm_area_struct of size 168 [ 30.895606] The buggy address is located 88 bytes inside of [ 30.895606] freed 168-byte region [ffff888018fb02b8, ffff888018fb0360) [ 30.896999] [ 30.897218] The buggy address belongs to the physical page: [ 30.897880] page:00000000d0362d4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fb0 [ 30.898968] memcg:ffff888019fa3e01 [ 30.899390] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900034] page_type: 0xffffffff() [ 30.900478] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.901388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fa3e01 [ 30.902284] page dumped because: kasan: bad access detected [ 30.902954] [ 30.903169] Memory state around the buggy address: [ 30.903746] ffff888018fb0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.904601] ffff888018fb0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.905452] >ffff888018fb0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.906296] ^ [ 30.906760] ffff888018fb0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.907619] ffff888018fb0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.908466] ================================================================== [ 30.909473] Disabling lock debugging due to kernel taint [ 32.895860] BUG: Bad rss-counter state mm:000000003ce3320d type:MM_FILEPAGES val:33 [ 32.897028] BUG: Bad rss-counter state mm:000000003ce3320d type:MM_ANONPAGES val:22 [ 33.331066] BUG: Bad rss-counter state mm:00000000c67b3390 type:MM_FILEPAGES val:33 [ 33.332052] BUG: Bad rss-counter state mm:00000000c67b3390 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49490' (ECDSA) to the list of known hosts. 2023/06/21 02:14:32 fuzzer started 2023/06/21 02:14:32 dialing manager at localhost:36067 2023/06/21 02:14:32 checking machine... 2023/06/21 02:14:32 checking revisions... [ 34.071724] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:14:32 testing simple program... [ 34.123264] cgroup: Unknown subsys name 'net' [ 34.176744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:32 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=0000558d746dcc78 CR3=0000000018fc6000 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=2032333a34313a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34313a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8180713d RBP=ffff88801a257440 RSP=ffff88801a257380 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff81806f57 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 00007f719cc7a900 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=00007f719d231618 CR3=000000000ddce000 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