syzkaller login: [ 36.491144] BUG: Bad rss-counter state mm:00000000abd3cd4e type:MM_FILEPAGES val:33 [ 36.492369] BUG: Bad rss-counter state mm:00000000abd3cd4e type:MM_ANONPAGES val:22 [ 36.677415] ================================================================== [ 36.678547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.679847] Read of size 8 at addr ffff88801035dc20 by task sshd/223 [ 36.680737] [ 36.680958] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.681835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.682840] Call Trace: [ 36.683163] [ 36.683460] dump_stack_lvl+0x91/0xf0 [ 36.683955] print_report+0xcc/0x620 [ 36.684484] ? __virt_addr_valid+0x102/0x340 [ 36.685055] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.685711] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.686385] kasan_report+0xbe/0xf0 [ 36.686888] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.687519] vma_interval_tree_remove+0xc75/0xec0 [ 36.688122] vma_prepare+0xc54/0x11a0 [ 36.688651] __split_vma+0x5af/0x950 [ 36.689149] ? __pfx___split_vma+0x10/0x10 [ 36.689708] ? find_held_lock+0x2c/0x110 [ 36.690242] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.690860] ? lock_is_held_type+0x9f/0x120 [ 36.691419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.692033] ? mtree_range_walk+0x632/0x900 [ 36.692608] ? mas_walk+0x5c7/0x7c0 [ 36.693085] do_vmi_munmap+0x1f1/0x2b0 [ 36.693608] mmap_region+0x1f9/0x2660 [ 36.694089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.694617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.695393] ? __pfx_lock_acquire+0x10/0x10 [ 36.695980] ? __pfx_mmap_region+0x10/0x10 [ 36.696530] ? security_mmap_addr+0x7d/0xa0 [ 36.697062] ? get_unmapped_area+0x1f5/0x3f0 [ 36.697635] do_mmap+0x854/0xf00 [ 36.698073] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.698592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.699186] ksys_mmap_pgoff+0x3af/0x500 [ 36.699711] do_syscall_64+0x3f/0x90 [ 36.700192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.700854] RIP: 0033:0x7fbab52eed82 [ 36.701315] 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 [ 36.703513] RSP: 002b:00007ffdf2f73c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.704438] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbab52eed82 [ 36.705293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbab4728000 [ 36.706155] RBP: 00007fbab4728000 R08: 0000000000000009 R09: 0000000000001000 [ 36.707046] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559700b62980 [ 36.707904] R13: 00007ffdf2f73c70 R14: 00007ffdf2f73ca0 R15: 00007ffdf2f74000 [ 36.708779] [ 36.709076] [ 36.709289] Allocated by task 214: [ 36.709738] kasan_save_stack+0x22/0x50 [ 36.710248] kasan_set_track+0x25/0x30 [ 36.710776] __kasan_slab_alloc+0x59/0x70 [ 36.711304] kmem_cache_alloc+0x16b/0x370 [ 36.711852] vm_area_dup+0x20/0x160 [ 36.712308] __split_vma+0x170/0x950 [ 36.712786] split_vma+0xc6/0x110 [ 36.713225] mprotect_fixup+0x8d2/0xb30 [ 36.713741] do_mprotect_pkey+0x87e/0xd40 [ 36.714273] __x64_sys_mprotect+0x78/0xc0 [ 36.714821] do_syscall_64+0x3f/0x90 [ 36.715307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.715974] [ 36.716191] Freed by task 214: [ 36.716618] kasan_save_stack+0x22/0x50 [ 36.717126] kasan_set_track+0x25/0x30 [ 36.717713] kasan_save_free_info+0x2b/0x50 [ 36.718351] __kasan_slab_free+0x10a/0x190 [ 36.718917] kmem_cache_free+0x10d/0x4d0 [ 36.719442] rcu_core+0x8c8/0x2860 [ 36.719886] __do_softirq+0x1b7/0x7d4 [ 36.720385] [ 36.720605] Last potentially related work creation: [ 36.721241] kasan_save_stack+0x22/0x50 [ 36.721763] __kasan_record_aux_stack+0x8e/0xa0 [ 36.722354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.723016] remove_vma+0x139/0x170 [ 36.723487] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.724056] do_vmi_munmap+0x1f1/0x2b0 [ 36.724580] __vm_munmap+0x138/0x3a0 [ 36.725061] __x64_sys_munmap+0x59/0x80 [ 36.725580] do_syscall_64+0x3f/0x90 [ 36.726050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.726763] [ 36.726990] The buggy address belongs to the object at ffff88801035dbc8 [ 36.726990] which belongs to the cache vm_area_struct of size 168 [ 36.728566] The buggy address is located 88 bytes inside of [ 36.728566] freed 168-byte region [ffff88801035dbc8, ffff88801035dc70) [ 36.730052] [ 36.730283] The buggy address belongs to the physical page: [ 36.730982] page:00000000566f8777 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1035d [ 36.732155] memcg:ffff88800d9beb01 [ 36.732620] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.733272] page_type: 0xffffffff() [ 36.733735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.734669] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9beb01 [ 36.735628] page dumped because: kasan: bad access detected [ 36.736334] [ 36.736569] Memory state around the buggy address: [ 36.737176] ffff88801035db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.738059] ffff88801035db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.738937] >ffff88801035dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.739850] ^ [ 36.740410] ffff88801035dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.741275] ffff88801035dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.742139] ================================================================== [ 36.743087] Disabling lock debugging due to kernel taint [ 38.844276] BUG: Bad rss-counter state mm:00000000731b93fe type:MM_FILEPAGES val:33 [ 38.845316] BUG: Bad rss-counter state mm:00000000731b93fe type:MM_ANONPAGES val:22 [ 39.353758] BUG: Bad rss-counter state mm:0000000054827927 type:MM_FILEPAGES val:33 [ 39.354746] BUG: Bad rss-counter state mm:0000000054827927 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40814' (ECDSA) to the list of known hosts. 2023/06/20 06:35:02 fuzzer started 2023/06/20 06:35:03 dialing manager at localhost:44161 2023/06/20 06:35:03 checking machine... 2023/06/20 06:35:03 checking revisions... [ 40.083504] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:35:03 testing simple program... [ 40.133164] cgroup: Unknown subsys name 'net' [ 40.177832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:34:55 Registers: info registers vcpu 0 RAX=ffffffff864bd3eb RBX=0000000000000001 RCX=ffffffff864bd3e6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd3ea R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf 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 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=00007f6da95f2c20 CR3=0000000016bba000 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=2032303a35333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88807ffd7030 RCX=0000000000000000 RDX=1ffff1100fffae06 RSI=ffffffff8114328a RDI=0000000000000006 RBP=000000001a29ea08 RSP=ffff88800ed56fe8 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6996 R12=ffff88807ffd7000 R13=ffffea000000000f R14=ffff88800ed57e70 R15=ffff88800ed571f8 RIP=ffffffff811432a8 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 00007fc95cbda900 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=00007fc95cb93008 CR3=000000000ddaa000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000