syzkaller login: [ 32.538286] BUG: Bad rss-counter state mm:0000000003eeb6cb type:MM_FILEPAGES val:33 [ 32.539275] BUG: Bad rss-counter state mm:0000000003eeb6cb type:MM_ANONPAGES val:22 [ 32.666024] ================================================================== [ 32.666700] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.667363] Read of size 8 at addr ffff888018b29058 by task sshd/220 [ 32.667923] [ 32.668071] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.668663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.669315] Call Trace: [ 32.669528] [ 32.669711] dump_stack_lvl+0x91/0xf0 [ 32.670287] print_report+0xcc/0x620 [ 32.670597] ? __virt_addr_valid+0x102/0x340 [ 32.670950] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.671371] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.671810] kasan_report+0xbe/0xf0 [ 32.672202] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.672642] vma_interval_tree_remove+0xc75/0xec0 [ 32.673086] vma_prepare+0xc54/0x11a0 [ 32.673441] __split_vma+0x5af/0x950 [ 32.673772] ? __pfx___split_vma+0x10/0x10 [ 32.674148] ? find_held_lock+0x2c/0x110 [ 32.674514] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.674902] ? lock_is_held_type+0x9f/0x120 [ 32.675254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.675653] ? mtree_range_walk+0x632/0x900 [ 32.676055] ? mas_walk+0x5c7/0x7c0 [ 32.676375] do_vmi_munmap+0x1f1/0x2b0 [ 32.676718] mmap_region+0x1f9/0x2660 [ 32.677046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.677401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.677899] ? __pfx_lock_acquire+0x10/0x10 [ 32.678285] ? __pfx_mmap_region+0x10/0x10 [ 32.678629] ? security_mmap_addr+0x7d/0xa0 [ 32.678986] ? get_unmapped_area+0x1f5/0x3f0 [ 32.679360] do_mmap+0x854/0xf00 [ 32.679671] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.680055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.680437] ksys_mmap_pgoff+0x3af/0x500 [ 32.680782] do_syscall_64+0x3f/0x90 [ 32.681102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.681544] RIP: 0033:0x7f944a6c4d82 [ 32.681853] 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 [ 32.683278] RSP: 002b:00007fffec82a258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.683959] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f944a6c4d82 [ 32.684519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9449afe000 [ 32.685057] RBP: 00007f9449afe000 R08: 0000000000000009 R09: 0000000000001000 [ 32.685609] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c634607b20 [ 32.686156] R13: 00007fffec82a270 R14: 00007fffec82a2a0 R15: 00007fffec82a600 [ 32.686736] [ 32.686929] [ 32.687076] Allocated by task 213: [ 32.687362] kasan_save_stack+0x22/0x50 [ 32.687702] kasan_set_track+0x25/0x30 [ 32.688066] __kasan_slab_alloc+0x59/0x70 [ 32.688412] kmem_cache_alloc+0x16b/0x370 [ 32.688763] vm_area_dup+0x20/0x160 [ 32.689077] __split_vma+0x170/0x950 [ 32.689396] split_vma+0xc6/0x110 [ 32.689689] mprotect_fixup+0x8d2/0xb30 [ 32.690017] do_mprotect_pkey+0x87e/0xd40 [ 32.690391] __x64_sys_mprotect+0x78/0xc0 [ 32.690737] do_syscall_64+0x3f/0x90 [ 32.691052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.691510] [ 32.691661] Freed by task 213: [ 32.691954] kasan_save_stack+0x22/0x50 [ 32.692287] kasan_set_track+0x25/0x30 [ 32.692632] kasan_save_free_info+0x2b/0x50 [ 32.692989] __kasan_slab_free+0x10a/0x190 [ 32.693336] kmem_cache_free+0x10d/0x4d0 [ 32.693664] rcu_core+0x8c8/0x2860 [ 32.693961] __do_softirq+0x1b7/0x7d4 [ 32.694289] [ 32.694466] Last potentially related work creation: [ 32.694863] kasan_save_stack+0x22/0x50 [ 32.695205] __kasan_record_aux_stack+0x8e/0xa0 [ 32.695641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.696132] remove_vma+0x139/0x170 [ 32.696433] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.696804] do_vmi_munmap+0x1f1/0x2b0 [ 32.697125] __vm_munmap+0x138/0x3a0 [ 32.697429] __x64_sys_munmap+0x59/0x80 [ 32.697762] do_syscall_64+0x3f/0x90 [ 32.698074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698521] [ 32.698665] The buggy address belongs to the object at ffff888018b29000 [ 32.698665] which belongs to the cache vm_area_struct of size 168 [ 32.699658] The buggy address is located 88 bytes inside of [ 32.699658] freed 168-byte region [ffff888018b29000, ffff888018b290a8) [ 32.700605] [ 32.700747] The buggy address belongs to the physical page: [ 32.701185] page:00000000ecec33de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b29 [ 32.701897] memcg:ffff88800ee4ea01 [ 32.702173] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.702616] page_type: 0xffffffff() [ 32.702905] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.703528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee4ea01 [ 32.704173] page dumped because: kasan: bad access detected [ 32.704597] [ 32.704734] Memory state around the buggy address: [ 32.705125] ffff888018b28f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.705679] ffff888018b28f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.706232] >ffff888018b29000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.706809] ^ [ 32.707267] ffff888018b29080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.707997] ffff888018b29100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.708582] ================================================================== [ 32.709349] Disabling lock debugging due to kernel taint [ 34.500351] BUG: Bad rss-counter state mm:0000000096419ecc type:MM_FILEPAGES val:33 [ 34.501045] BUG: Bad rss-counter state mm:0000000096419ecc type:MM_ANONPAGES val:22 [ 34.872115] BUG: Bad rss-counter state mm:00000000b1f1282a type:MM_FILEPAGES val:33 [ 34.872774] BUG: Bad rss-counter state mm:00000000b1f1282a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38674' (ECDSA) to the list of known hosts. 2023/06/20 09:01:53 fuzzer started 2023/06/20 09:01:53 dialing manager at localhost:44161 2023/06/20 09:01:53 checking machine... 2023/06/20 09:01:53 checking revisions... [ 35.448880] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:01:53 testing simple program... [ 35.486250] cgroup: Unknown subsys name 'net' [ 35.532920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:01:51 Registers: info registers vcpu 0 RAX=1ffffffff0c26e00 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86137006 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137008 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff811311c7 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 00007ffa0650e900 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=00007ffa06ac5618 CR3=000000000cbd0000 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=2033353a31303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31303a3930203032 XMM08=3d656e696c646d632022656369767265 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=00007f11e5ff8820 CR3=000000000cb28000 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=44d1475372540baf5d42e44a14adb269 XMM02=000000000011cb98ec2efd57dc4c00df XMM03=0000000000124110505828ef79d97abb XMM04=69346e1ba2df815400000000000ae988 XMM05=19e9129bd510f2350000000000133d18 XMM06=4fda316b135da52b0000000000133ba0 XMM07=e042d86d42eb936e0000000000124390 XMM08=505828ef79d97abb000000000011cbf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000