syzkaller login: [ 30.674088] BUG: Bad rss-counter state mm:00000000db2f1b5d type:MM_FILEPAGES val:33 [ 30.675218] BUG: Bad rss-counter state mm:00000000db2f1b5d type:MM_ANONPAGES val:22 [ 30.839602] ================================================================== [ 30.840713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.841953] Read of size 8 at addr ffff88800f128058 by task sshd/221 [ 30.842807] [ 30.843027] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844893] Call Trace: [ 30.845217] [ 30.845501] dump_stack_lvl+0x91/0xf0 [ 30.846008] print_report+0xcc/0x620 [ 30.846504] ? __virt_addr_valid+0x102/0x340 [ 30.847058] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847685] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848301] kasan_report+0xbe/0xf0 [ 30.848786] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849423] vma_interval_tree_remove+0xc75/0xec0 [ 30.850041] vma_prepare+0xc54/0x11a0 [ 30.850528] __split_vma+0x5af/0x950 [ 30.851005] ? __pfx___split_vma+0x10/0x10 [ 30.851537] ? find_held_lock+0x2c/0x110 [ 30.852068] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.852642] ? lock_is_held_type+0x9f/0x120 [ 30.853186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.853802] ? mtree_range_walk+0x632/0x900 [ 30.854363] ? mas_walk+0x5c7/0x7c0 [ 30.854844] do_vmi_munmap+0x1f1/0x2b0 [ 30.855343] mmap_region+0x1f9/0x2660 [ 30.855835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.856350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.857066] ? __pfx_lock_acquire+0x10/0x10 [ 30.857605] ? __pfx_mmap_region+0x10/0x10 [ 30.858160] ? security_mmap_addr+0x7d/0xa0 [ 30.858697] ? get_unmapped_area+0x1f5/0x3f0 [ 30.859259] do_mmap+0x854/0xf00 [ 30.859702] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.860204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.860771] ksys_mmap_pgoff+0x3af/0x500 [ 30.861285] do_syscall_64+0x3f/0x90 [ 30.861770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862435] RIP: 0033:0x7f04c43dad82 [ 30.862901] 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 [ 30.865096] RSP: 002b:00007ffc3207b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.866026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04c43dad82 [ 30.866883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04c3814000 [ 30.867741] RBP: 00007f04c3814000 R08: 0000000000000009 R09: 0000000000001000 [ 30.868619] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562453c3cf70 [ 30.869479] R13: 00007ffc3207b860 R14: 00007ffc3207b890 R15: 00007ffc3207bbf0 [ 30.870348] [ 30.870641] [ 30.870860] Allocated by task 214: [ 30.871298] kasan_save_stack+0x22/0x50 [ 30.871804] kasan_set_track+0x25/0x30 [ 30.872324] __kasan_slab_alloc+0x59/0x70 [ 30.872860] kmem_cache_alloc+0x16b/0x370 [ 30.873376] vm_area_dup+0x20/0x160 [ 30.873854] __split_vma+0x170/0x950 [ 30.874351] split_vma+0xc6/0x110 [ 30.874800] mprotect_fixup+0x8d2/0xb30 [ 30.875301] do_mprotect_pkey+0x87e/0xd40 [ 30.875828] __x64_sys_mprotect+0x78/0xc0 [ 30.876364] do_syscall_64+0x3f/0x90 [ 30.876847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877505] [ 30.877731] Freed by task 13: [ 30.878117] kasan_save_stack+0x22/0x50 [ 30.878637] kasan_set_track+0x25/0x30 [ 30.879136] kasan_save_free_info+0x2b/0x50 [ 30.879666] __kasan_slab_free+0x10a/0x190 [ 30.880208] kmem_cache_free+0x10d/0x4d0 [ 30.880734] rcu_core+0x8c8/0x2860 [ 30.881190] __do_softirq+0x1b7/0x7d4 [ 30.881676] [ 30.881918] Last potentially related work creation: [ 30.882504] kasan_save_stack+0x22/0x50 [ 30.883004] __kasan_record_aux_stack+0x8e/0xa0 [ 30.883576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.884222] remove_vma+0x139/0x170 [ 30.884673] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885230] do_vmi_munmap+0x1f1/0x2b0 [ 30.885724] __vm_munmap+0x138/0x3a0 [ 30.886203] __x64_sys_munmap+0x59/0x80 [ 30.886701] do_syscall_64+0x3f/0x90 [ 30.887174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887814] [ 30.888033] The buggy address belongs to the object at ffff88800f128000 [ 30.888033] which belongs to the cache vm_area_struct of size 168 [ 30.889492] The buggy address is located 88 bytes inside of [ 30.889492] freed 168-byte region [ffff88800f128000, ffff88800f1280a8) [ 30.890921] [ 30.891135] The buggy address belongs to the physical page: [ 30.891805] page:000000003188250d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf128 [ 30.892889] memcg:ffff88800e75b701 [ 30.893324] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893975] page_type: 0xffffffff() [ 30.894426] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.895362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e75b701 [ 30.896280] page dumped because: kasan: bad access detected [ 30.896938] [ 30.897154] Memory state around the buggy address: [ 30.897732] ffff88800f127f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.898610] ffff88800f127f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.899470] >ffff88800f128000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900328] ^ [ 30.901050] ffff88800f128080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.901923] ffff88800f128100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902774] ================================================================== [ 30.903755] Disabling lock debugging due to kernel taint [ 32.893463] BUG: Bad rss-counter state mm:0000000058940315 type:MM_FILEPAGES val:33 [ 32.894484] BUG: Bad rss-counter state mm:0000000058940315 type:MM_ANONPAGES val:22 [ 33.447423] BUG: Bad rss-counter state mm:00000000c6af6f2b type:MM_FILEPAGES val:33 [ 33.448588] BUG: Bad rss-counter state mm:00000000c6af6f2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20217' (ECDSA) to the list of known hosts. 2023/06/20 11:45:01 fuzzer started 2023/06/20 11:45:02 dialing manager at localhost:36067 2023/06/20 11:45:02 checking machine... 2023/06/20 11:45:02 checking revisions... [ 34.062488] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:45:02 testing simple program... [ 34.106276] cgroup: Unknown subsys name 'net' [ 34.146601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:01 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=0000000000000001 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=00007ffc2d467d08 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f7928f7c510000055e0338cc790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180effe RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11001eedf19 RSI=0000000000000000 RDI=ffffffff8180effe RBP=ffff88800f76f908 RSP=ffff88800f76f870 R8 =ffffffff86138e90 R9 =ffff88800f76f8b0 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800f76f938 R13=0000000000000000 R14=ffff888018381b40 R15=ffff888019254698 RIP=ffffffff810bd06d 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 00007f746345a900 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=00007f7463a11618 CR3=0000000018314000 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=563412feff00545000000000000080fe 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