syzkaller login: [ 36.401029] BUG: Bad rss-counter state mm:0000000023629116 type:MM_FILEPAGES val:33 [ 36.402890] BUG: Bad rss-counter state mm:0000000023629116 type:MM_ANONPAGES val:22 [ 36.566221] ================================================================== [ 36.567391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.568559] Read of size 8 at addr ffff88800ff75ed8 by task sshd/219 [ 36.569333] [ 36.569551] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.570435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.571473] Call Trace: [ 36.571802] [ 36.572088] dump_stack_lvl+0x91/0xf0 [ 36.572592] print_report+0xcc/0x620 [ 36.573094] ? __virt_addr_valid+0x102/0x340 [ 36.573655] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.574289] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.574949] kasan_report+0xbe/0xf0 [ 36.575433] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.576064] vma_interval_tree_remove+0xc75/0xec0 [ 36.576674] vma_prepare+0xc54/0x11a0 [ 36.577163] __split_vma+0x5af/0x950 [ 36.577638] ? __pfx___split_vma+0x10/0x10 [ 36.578178] ? find_held_lock+0x2c/0x110 [ 36.578740] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.579318] ? lock_is_held_type+0x9f/0x120 [ 36.579864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.580480] ? mtree_range_walk+0x632/0x900 [ 36.581032] ? mas_walk+0x5c7/0x7c0 [ 36.581523] do_vmi_munmap+0x1f1/0x2b0 [ 36.582025] mmap_region+0x1f9/0x2660 [ 36.582507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.583049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.583776] ? __pfx_lock_acquire+0x10/0x10 [ 36.584322] ? __pfx_mmap_region+0x10/0x10 [ 36.584866] ? security_mmap_addr+0x7d/0xa0 [ 36.585397] ? get_unmapped_area+0x1f5/0x3f0 [ 36.585952] do_mmap+0x854/0xf00 [ 36.586400] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.586947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.587513] ksys_mmap_pgoff+0x3af/0x500 [ 36.588027] do_syscall_64+0x3f/0x90 [ 36.588511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.589176] RIP: 0033:0x7f559c067d82 [ 36.589641] 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 [ 36.591827] RSP: 002b:00007ffd3aa40638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.592847] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f559c067d82 [ 36.593715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f559b4a1000 [ 36.594601] RBP: 00007f559b4a1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.595473] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b95e4c3b20 [ 36.596312] R13: 00007ffd3aa40650 R14: 00007ffd3aa40680 R15: 00007ffd3aa409e0 [ 36.597182] [ 36.597477] [ 36.597695] Allocated by task 212: [ 36.598144] kasan_save_stack+0x22/0x50 [ 36.598710] kasan_set_track+0x25/0x30 [ 36.599215] __kasan_slab_alloc+0x59/0x70 [ 36.599750] kmem_cache_alloc+0x16b/0x370 [ 36.600270] vm_area_dup+0x20/0x160 [ 36.600726] __split_vma+0x170/0x950 [ 36.601193] split_vma+0xc6/0x110 [ 36.601644] mprotect_fixup+0x8d2/0xb30 [ 36.602149] do_mprotect_pkey+0x87e/0xd40 [ 36.602701] __x64_sys_mprotect+0x78/0xc0 [ 36.603231] do_syscall_64+0x3f/0x90 [ 36.603702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.604348] [ 36.604566] Freed by task 212: [ 36.604965] kasan_save_stack+0x22/0x50 [ 36.605474] kasan_set_track+0x25/0x30 [ 36.605973] kasan_save_free_info+0x2b/0x50 [ 36.606516] __kasan_slab_free+0x10a/0x190 [ 36.607084] kmem_cache_free+0x10d/0x4d0 [ 36.607596] rcu_core+0x8c8/0x2860 [ 36.608049] __do_softirq+0x1b7/0x7d4 [ 36.608529] [ 36.608746] Last potentially related work creation: [ 36.609328] kasan_save_stack+0x22/0x50 [ 36.609842] __kasan_record_aux_stack+0x8e/0xa0 [ 36.610419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.611110] remove_vma+0x139/0x170 [ 36.611564] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.612134] do_vmi_munmap+0x1f1/0x2b0 [ 36.612634] __vm_munmap+0x138/0x3a0 [ 36.613113] __x64_sys_munmap+0x59/0x80 [ 36.613618] do_syscall_64+0x3f/0x90 [ 36.614095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.614765] [ 36.614982] Second to last potentially related work creation: [ 36.615676] kasan_save_stack+0x22/0x50 [ 36.616180] __kasan_record_aux_stack+0x8e/0xa0 [ 36.616763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.617412] remove_vma+0x139/0x170 [ 36.617866] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.618430] do_vmi_munmap+0x1f1/0x2b0 [ 36.618962] mmap_region+0x1f9/0x2660 [ 36.619457] do_mmap+0x854/0xf00 [ 36.619889] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.620388] ksys_mmap_pgoff+0x3af/0x500 [ 36.620897] do_syscall_64+0x3f/0x90 [ 36.621375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.622021] [ 36.622237] The buggy address belongs to the object at ffff88800ff75e80 [ 36.622237] which belongs to the cache vm_area_struct of size 168 [ 36.623779] The buggy address is located 88 bytes inside of [ 36.623779] freed 168-byte region [ffff88800ff75e80, ffff88800ff75f28) [ 36.625217] [ 36.625435] The buggy address belongs to the physical page: [ 36.626097] page:00000000adc7bce5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff75 [ 36.627222] memcg:ffff8880094b6901 [ 36.627648] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.628309] page_type: 0xffffffff() [ 36.628772] raw: 0100000000000200 ffff88800879fc80 ffffea000051f7c0 0000000000000006 [ 36.629703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b6901 [ 36.630668] page dumped because: kasan: bad access detected [ 36.631343] [ 36.631565] Memory state around the buggy address: [ 36.632159] ffff88800ff75d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.633031] ffff88800ff75e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.633905] >ffff88800ff75e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.634796] ^ [ 36.635532] ffff88800ff75f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.636395] ffff88800ff75f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.637275] ================================================================== [ 36.638306] Disabling lock debugging due to kernel taint [ 38.636930] BUG: Bad rss-counter state mm:00000000043dbfd2 type:MM_FILEPAGES val:33 [ 38.638092] BUG: Bad rss-counter state mm:00000000043dbfd2 type:MM_ANONPAGES val:22 [ 39.113996] BUG: Bad rss-counter state mm:00000000c94a9960 type:MM_FILEPAGES val:33 [ 39.115152] BUG: Bad rss-counter state mm:00000000c94a9960 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13502' (ECDSA) to the list of known hosts. 2023/06/20 03:32:37 fuzzer started 2023/06/20 03:32:38 dialing manager at localhost:44161 2023/06/20 03:32:38 checking machine... 2023/06/20 03:32:38 checking revisions... [ 39.739772] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:32:38 testing simple program... [ 39.785244] cgroup: Unknown subsys name 'net' [ 39.890794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:31 Registers: info registers vcpu 0 RAX=ffffffff864b9d5b RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b9d5a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ab5 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdbf09b900 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=00007efdbf6530b0 CR3=000000000e26c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffd3e3a3ef8 CR3=0000000009864000 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=2037333a32333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000