syzkaller login: [ 38.940238] BUG: Bad rss-counter state mm:00000000e8b66cd8 type:MM_FILEPAGES val:33 [ 38.941584] BUG: Bad rss-counter state mm:00000000e8b66cd8 type:MM_ANONPAGES val:22 [ 38.949425] ================================================================== [ 38.950456] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951501] Read of size 8 at addr ffff888016415798 by task sshd/219 [ 38.952357] [ 38.952639] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.953581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.954710] Call Trace: [ 38.955030] [ 38.955416] dump_stack_lvl+0x91/0xf0 [ 38.955934] print_report+0xcc/0x620 [ 38.956447] ? __virt_addr_valid+0x102/0x340 [ 38.957122] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957814] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.958505] kasan_report+0xbe/0xf0 [ 38.959112] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.959973] vma_interval_tree_remove+0xc75/0xec0 [ 38.960779] vma_prepare+0xc54/0x11a0 [ 38.961434] __split_vma+0x5af/0x950 [ 38.962081] ? __pfx___split_vma+0x10/0x10 [ 38.962817] ? find_held_lock+0x2c/0x110 [ 38.963559] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.964394] ? lock_is_held_type+0x9f/0x120 [ 38.965126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.965935] ? mtree_range_walk+0x632/0x900 [ 38.966688] ? mas_walk+0x5c7/0x7c0 [ 38.967317] do_vmi_munmap+0x1f1/0x2b0 [ 38.967985] mmap_region+0x1f9/0x2660 [ 38.968614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.969309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.970245] ? __pfx_lock_acquire+0x10/0x10 [ 38.970971] ? __pfx_mmap_region+0x10/0x10 [ 38.971701] ? security_mmap_addr+0x7d/0xa0 [ 38.972423] ? get_unmapped_area+0x1f5/0x3f0 [ 38.973159] do_mmap+0x854/0xf00 [ 38.973719] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.974344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.975091] ksys_mmap_pgoff+0x3af/0x500 [ 38.975801] do_syscall_64+0x3f/0x90 [ 38.976448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977269] RIP: 0033:0x7f694ce45d82 [ 38.977874] 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 [ 38.980753] RSP: 002b:00007ffed5884ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.981935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f694ce45d82 [ 38.983012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f694c27f000 [ 38.984174] RBP: 00007f694c27f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.985242] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1ec17cec0 [ 38.986186] R13: 00007ffed5884ae0 R14: 00007ffed5884b10 R15: 00007ffed5884e70 [ 38.987296] [ 38.987640] [ 38.987879] Allocated by task 212: [ 38.988361] kasan_save_stack+0x22/0x50 [ 38.988937] kasan_set_track+0x25/0x30 [ 38.989620] __kasan_slab_alloc+0x59/0x70 [ 38.990303] kmem_cache_alloc+0x16b/0x370 [ 38.990970] vm_area_dup+0x20/0x160 [ 38.991574] __split_vma+0x170/0x950 [ 38.992180] split_vma+0xc6/0x110 [ 38.992750] mprotect_fixup+0x8d2/0xb30 [ 38.993397] do_mprotect_pkey+0x87e/0xd40 [ 38.994079] __x64_sys_mprotect+0x78/0xc0 [ 38.994778] do_syscall_64+0x3f/0x90 [ 38.995424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.996290] [ 38.996575] Freed by task 212: [ 38.997107] kasan_save_stack+0x22/0x50 [ 38.997778] kasan_set_track+0x25/0x30 [ 38.998434] kasan_save_free_info+0x2b/0x50 [ 38.999151] __kasan_slab_free+0x10a/0x190 [ 38.999894] kmem_cache_free+0x10d/0x4d0 [ 39.000511] rcu_core+0x8c8/0x2860 [ 39.001036] __do_softirq+0x1b7/0x7d4 [ 39.001606] [ 39.001865] Last potentially related work creation: [ 39.002579] kasan_save_stack+0x22/0x50 [ 39.003199] __kasan_record_aux_stack+0x8e/0xa0 [ 39.003884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.004653] remove_vma+0x139/0x170 [ 39.005206] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.005880] do_vmi_munmap+0x1f1/0x2b0 [ 39.006467] __vm_munmap+0x138/0x3a0 [ 39.007018] __x64_sys_munmap+0x59/0x80 [ 39.007619] do_syscall_64+0x3f/0x90 [ 39.008181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.008950] [ 39.009210] The buggy address belongs to the object at ffff888016415740 [ 39.009210] which belongs to the cache vm_area_struct of size 168 [ 39.010979] The buggy address is located 88 bytes inside of [ 39.010979] freed 168-byte region [ffff888016415740, ffff8880164157e8) [ 39.012685] [ 39.012935] The buggy address belongs to the physical page: [ 39.013741] page:0000000041bdc5d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16415 [ 39.015065] memcg:ffff8880191ec301 [ 39.015587] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.016354] page_type: 0xffffffff() [ 39.016889] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d700 dead000000000002 [ 39.017996] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191ec301 [ 39.019093] page dumped because: kasan: bad access detected [ 39.019899] [ 39.020155] Memory state around the buggy address: [ 39.020860] ffff888016415680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.021879] ffff888016415700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.022908] >ffff888016415780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.023911] ^ [ 39.024503] ffff888016415800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.025531] ffff888016415880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.026485] ================================================================== [ 39.027623] Disabling lock debugging due to kernel taint [ 41.469236] BUG: Bad rss-counter state mm:0000000060b3fa70 type:MM_FILEPAGES val:33 [ 41.470400] BUG: Bad rss-counter state mm:0000000060b3fa70 type:MM_ANONPAGES val:22 [ 41.988263] BUG: Bad rss-counter state mm:00000000589ed0e6 type:MM_FILEPAGES val:33 [ 41.989303] BUG: Bad rss-counter state mm:00000000589ed0e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12355' (ECDSA) to the list of known hosts. 2023/06/21 07:53:24 fuzzer started 2023/06/21 07:53:24 dialing manager at localhost:36067 2023/06/21 07:53:24 checking machine... 2023/06/21 07:53:24 checking revisions... [ 42.780201] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:53:24 testing simple program... [ 42.835463] cgroup: Unknown subsys name 'net' [ 42.904058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=0000000000001255 RSI=00007ffc6fd8d46c RDI=ffff888009481bc8 RBP=ffff888009481bc8 RSP=ffff88800fd07e68 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ffc6fd8d46c R14=ffff888009481bd8 R15=0000000000000040 RIP=ffffffff81717d92 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7d725d4900 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=00007ffc6fd8d46c CR3=00000000190d0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=3221ad5e8520e62c0512cc47c90c11ad XMM05=000000000000000000000000000000ff XMM06=32214e5e5220e62c05127f1fc90c1100 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d628ab RBX=ffff88800eb14528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800eb14558 RBP=ffff88800e3f4c38 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800e402280 R14=ffffffff8186b835 R15=ffff88800d328900 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007f5743f90210 CR3=000000000dc2c000 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=33353a3730203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363931 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000