syzkaller login: [ 30.915703] BUG: Bad rss-counter state mm:000000009ad7bd99 type:MM_FILEPAGES val:33 [ 30.916755] BUG: Bad rss-counter state mm:000000009ad7bd99 type:MM_ANONPAGES val:22 [ 31.053388] ================================================================== [ 31.054048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.054850] Read of size 8 at addr ffff888019a11a50 by task sshd/219 [ 31.055398] [ 31.055620] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.056172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.056904] Call Trace: [ 31.057112] <TASK> [ 31.057296] dump_stack_lvl+0x91/0xf0 [ 31.057646] print_report+0xcc/0x620 [ 31.058231] ? __virt_addr_valid+0x102/0x340 [ 31.058613] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059435] kasan_report+0xbe/0xf0 [ 31.059743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.060143] vma_interval_tree_remove+0xc75/0xec0 [ 31.060531] vma_prepare+0xc54/0x11a0 [ 31.060840] __split_vma+0x5af/0x950 [ 31.061146] ? __pfx___split_vma+0x10/0x10 [ 31.061493] ? find_held_lock+0x2c/0x110 [ 31.061830] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.062196] ? lock_is_held_type+0x9f/0x120 [ 31.062721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.063128] ? mtree_range_walk+0x632/0x900 [ 31.063490] ? mas_walk+0x5c7/0x7c0 [ 31.063851] do_vmi_munmap+0x1f1/0x2b0 [ 31.064165] mmap_region+0x1f9/0x2660 [ 31.064473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.064806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.065254] ? __pfx_lock_acquire+0x10/0x10 [ 31.065590] ? __pfx_mmap_region+0x10/0x10 [ 31.065924] ? security_mmap_addr+0x7d/0xa0 [ 31.066260] ? get_unmapped_area+0x1f5/0x3f0 [ 31.066672] do_mmap+0x854/0xf00 [ 31.066963] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.067301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.068232] ksys_mmap_pgoff+0x3af/0x500 [ 31.068631] do_syscall_64+0x3f/0x90 [ 31.068946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069366] RIP: 0033:0x7f354efb5d82 [ 31.069696] 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 [ 31.071213] RSP: 002b:00007ffe91888588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.071859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f354efb5d82 [ 31.072409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f354e3ef000 [ 31.072954] RBP: 00007f354e3ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.073504] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600a2d80ec0 [ 31.074078] R13: 00007ffe918885a0 R14: 00007ffe918885d0 R15: 00007ffe91888930 [ 31.074676] </TASK> [ 31.074870] [ 31.075020] Allocated by task 212: [ 31.075309] kasan_save_stack+0x22/0x50 [ 31.075651] kasan_set_track+0x25/0x30 [ 31.075981] __kasan_slab_alloc+0x59/0x70 [ 31.076336] kmem_cache_alloc+0x16b/0x370 [ 31.076683] vm_area_dup+0x20/0x160 [ 31.076987] __split_vma+0x170/0x950 [ 31.077302] split_vma+0xc6/0x110 [ 31.077601] mprotect_fixup+0x8d2/0xb30 [ 31.077931] do_mprotect_pkey+0x87e/0xd40 [ 31.078276] __x64_sys_mprotect+0x78/0xc0 [ 31.078635] do_syscall_64+0x3f/0x90 [ 31.078954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.079394] [ 31.079541] Freed by task 212: [ 31.079837] kasan_save_stack+0x22/0x50 [ 31.080186] kasan_set_track+0x25/0x30 [ 31.080505] kasan_save_free_info+0x2b/0x50 [ 31.080849] __kasan_slab_free+0x10a/0x190 [ 31.081195] kmem_cache_free+0x10d/0x4d0 [ 31.081524] rcu_core+0x8c8/0x2860 [ 31.081811] __do_softirq+0x1b7/0x7d4 [ 31.082119] [ 31.082260] Last potentially related work creation: [ 31.082660] kasan_save_stack+0x22/0x50 [ 31.082990] __kasan_record_aux_stack+0x8e/0xa0 [ 31.083365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.083779] remove_vma+0x139/0x170 [ 31.084084] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.084454] do_vmi_munmap+0x1f1/0x2b0 [ 31.084767] __vm_munmap+0x138/0x3a0 [ 31.085073] __x64_sys_munmap+0x59/0x80 [ 31.085410] do_syscall_64+0x3f/0x90 [ 31.085769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086203] [ 31.086352] The buggy address belongs to the object at ffff888019a119f8 [ 31.086352] which belongs to the cache vm_area_struct of size 168 [ 31.087333] The buggy address is located 88 bytes inside of [ 31.087333] freed 168-byte region [ffff888019a119f8, ffff888019a11aa0) [ 31.088231] [ 31.088373] The buggy address belongs to the physical page: [ 31.088804] page:000000006ba9e3a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a11 [ 31.089502] memcg:ffff88800e282401 [ 31.089784] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.090253] page_type: 0xffffffff() [ 31.090597] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319280 0000000000000007 [ 31.091221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e282401 [ 31.091789] page dumped because: kasan: bad access detected [ 31.092204] [ 31.092346] Memory state around the buggy address: [ 31.092721] ffff888019a11900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.093258] ffff888019a11980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.093793] >ffff888019a11a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.094343] ^ [ 31.094821] ffff888019a11a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.095369] ffff888019a11b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.095941] ================================================================== [ 31.096772] Disabling lock debugging due to kernel taint [ 33.133645] BUG: Bad rss-counter state mm:000000007fdc077c type:MM_FILEPAGES val:32 [ 33.134380] BUG: Bad rss-counter state mm:000000007fdc077c type:MM_ANONPAGES val:22 [ 33.669180] BUG: Bad rss-counter state mm:000000000a9d474d type:MM_FILEPAGES val:33 [ 33.669861] BUG: Bad rss-counter state mm:000000000a9d474d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46973' (ECDSA) to the list of known hosts. 2023/06/21 10:37:23 fuzzer started 2023/06/21 10:37:23 dialing manager at localhost:36067 2023/06/21 10:37:23 checking machine... 2023/06/21 10:37:23 checking revisions... 2023/06/21 10:37:24 testing simple program... [ 34.205094] kmemleak: Automatic memory scanning thread ended [ 34.258584] cgroup: Unknown subsys name 'net' [ 34.291586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:37:23 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=ffff88800f3d8000 RCX=0000000000000000 RDX=ffffc90000660000 RSI=ffffffff83018b3f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801cd27df0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f3d9428 R14=ffff88800f3d9040 R15=000000000000000a RIP=ffffffff83018b6c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe18b62f900 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=00005573522d0428 CR3=000000000ec42000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff052359ab0 CR3=000000000c7cc000 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=641681c073bb2790c342e52322e88b30 XMM02=ec2efd57dc4c00df000000000011be98 XMM03=7976ca49d91f7d26000000000011bf68 XMM04=8c860f614f300bf200000000000ae988 XMM05=dfcdbad4f1609c370000000000131d50 XMM06=806171799158d9670000000000131bd8 XMM07=e042d86d42eb936e0000000000122408 XMM08=7976ca49d91f7d26000000000011bf68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000