syzkaller login: [ 32.170567] BUG: Bad rss-counter state mm:000000004e3039b0 type:MM_FILEPAGES val:33 [ 32.172000] BUG: Bad rss-counter state mm:000000004e3039b0 type:MM_ANONPAGES val:22 [ 32.327009] ================================================================== [ 32.327926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.328883] Read of size 8 at addr ffff88800dbf1df0 by task sshd/221 [ 32.329674] [ 32.329899] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.330848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.331838] Call Trace: [ 32.332164] [ 32.332616] dump_stack_lvl+0x91/0xf0 [ 32.333206] print_report+0xcc/0x620 [ 32.333813] ? __virt_addr_valid+0x102/0x340 [ 32.334485] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.335224] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.335966] kasan_report+0xbe/0xf0 [ 32.336544] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.337272] vma_interval_tree_remove+0xc75/0xec0 [ 32.337989] vma_prepare+0xc54/0x11a0 [ 32.338546] __split_vma+0x5af/0x950 [ 32.339103] ? __pfx___split_vma+0x10/0x10 [ 32.339725] ? find_held_lock+0x2c/0x110 [ 32.340363] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.341028] ? lock_is_held_type+0x9f/0x120 [ 32.341632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.342224] ? mtree_range_walk+0x632/0x900 [ 32.342770] ? mas_walk+0x5c7/0x7c0 [ 32.343247] do_vmi_munmap+0x1f1/0x2b0 [ 32.343745] mmap_region+0x1f9/0x2660 [ 32.344219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.344740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.345443] ? __pfx_lock_acquire+0x10/0x10 [ 32.345970] ? __pfx_mmap_region+0x10/0x10 [ 32.346494] ? security_mmap_addr+0x7d/0xa0 [ 32.347018] ? get_unmapped_area+0x1f5/0x3f0 [ 32.347560] do_mmap+0x854/0xf00 [ 32.347993] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.348500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.349064] ksys_mmap_pgoff+0x3af/0x500 [ 32.349576] do_syscall_64+0x3f/0x90 [ 32.350045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.350687] RIP: 0033:0x7f78f6692d82 [ 32.351142] 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 [ 32.353295] RSP: 002b:00007ffc9786a498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.354207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78f6692d82 [ 32.355058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78f5acc000 [ 32.355902] RBP: 00007f78f5acc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.356754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c459a07ec0 [ 32.357599] R13: 00007ffc9786a4b0 R14: 00007ffc9786a4e0 R15: 00007ffc9786a840 [ 32.358455] [ 32.358750] [ 32.358967] Allocated by task 214: [ 32.359388] kasan_save_stack+0x22/0x50 [ 32.359891] kasan_set_track+0x25/0x30 [ 32.360396] __kasan_slab_alloc+0x59/0x70 [ 32.360941] kmem_cache_alloc+0x16b/0x370 [ 32.361478] vm_area_dup+0x20/0x160 [ 32.361952] __split_vma+0x170/0x950 [ 32.362439] split_vma+0xc6/0x110 [ 32.362902] mprotect_fixup+0x8d2/0xb30 [ 32.363429] do_mprotect_pkey+0x87e/0xd40 [ 32.363984] __x64_sys_mprotect+0x78/0xc0 [ 32.364539] do_syscall_64+0x3f/0x90 [ 32.365035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.365710] [ 32.365933] Freed by task 214: [ 32.366345] kasan_save_stack+0x22/0x50 [ 32.366871] kasan_set_track+0x25/0x30 [ 32.367380] kasan_save_free_info+0x2b/0x50 [ 32.367952] __kasan_slab_free+0x10a/0x190 [ 32.368516] kmem_cache_free+0x10d/0x4d0 [ 32.369059] rcu_core+0x8c8/0x2860 [ 32.369528] __do_softirq+0x1b7/0x7d4 [ 32.370035] [ 32.370261] Last potentially related work creation: [ 32.370874] kasan_save_stack+0x22/0x50 [ 32.371406] __kasan_record_aux_stack+0x8e/0xa0 [ 32.372030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.372725] remove_vma+0x139/0x170 [ 32.373193] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.373774] do_vmi_munmap+0x1f1/0x2b0 [ 32.374280] __vm_munmap+0x138/0x3a0 [ 32.374771] __x64_sys_munmap+0x59/0x80 [ 32.375288] do_syscall_64+0x3f/0x90 [ 32.375785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.376464] [ 32.376687] Second to last potentially related work creation: [ 32.377403] kasan_save_stack+0x22/0x50 [ 32.377916] __kasan_record_aux_stack+0x8e/0xa0 [ 32.378518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.379184] remove_vma+0x139/0x170 [ 32.379656] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.380231] do_vmi_munmap+0x1f1/0x2b0 [ 32.380751] mmap_region+0x1f9/0x2660 [ 32.381252] do_mmap+0x854/0xf00 [ 32.381702] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.382207] ksys_mmap_pgoff+0x3af/0x500 [ 32.382732] do_syscall_64+0x3f/0x90 [ 32.383217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383882] [ 32.384099] The buggy address belongs to the object at ffff88800dbf1d98 [ 32.384099] which belongs to the cache vm_area_struct of size 168 [ 32.385641] The buggy address is located 88 bytes inside of [ 32.385641] freed 168-byte region [ffff88800dbf1d98, ffff88800dbf1e40) [ 32.387085] [ 32.387308] The buggy address belongs to the physical page: [ 32.388007] page:00000000f6f428e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbf1 [ 32.389158] memcg:ffff88800e204501 [ 32.389619] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.390305] page_type: 0xffffffff() [ 32.390772] raw: 0100000000000200 ffff88800879fc80 ffffea00003894c0 dead000000000006 [ 32.391725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e204501 [ 32.392691] page dumped because: kasan: bad access detected [ 32.393373] [ 32.393610] Memory state around the buggy address: [ 32.394212] ffff88800dbf1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.395083] ffff88800dbf1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.395980] >ffff88800dbf1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.396872] ^ [ 32.397724] ffff88800dbf1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.398619] ffff88800dbf1e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.399530] ================================================================== [ 32.400717] Disabling lock debugging due to kernel taint [ 34.269028] BUG: Bad rss-counter state mm:00000000f108ff19 type:MM_FILEPAGES val:33 [ 34.270211] BUG: Bad rss-counter state mm:00000000f108ff19 type:MM_ANONPAGES val:22 [ 34.667493] BUG: Bad rss-counter state mm:00000000a48e1f24 type:MM_FILEPAGES val:33 [ 34.668442] BUG: Bad rss-counter state mm:00000000a48e1f24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63710' (ECDSA) to the list of known hosts. 2023/06/19 20:53:13 fuzzer started 2023/06/19 20:53:13 dialing manager at localhost:44161 2023/06/19 20:53:13 checking machine... 2023/06/19 20:53:13 checking revisions... [ 35.387873] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:53:13 testing simple program... [ 35.443151] cgroup: Unknown subsys name 'net' [ 35.500853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:12 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=00007fff34546ff8 CR3=000000001951e000 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=2032313a33353a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84531da6 RDX=000000000003531d RSI=000000000003531d RDI=ffffffff865bc834 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a 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 00007fa34a985900 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=00007fa34af3a650 CR3=000000001c97a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000