syzkaller login: [ 39.077040] sshd (211) used greatest stack depth: 23992 bytes left [ 39.078233] BUG: Bad rss-counter state mm:00000000e14b77f3 type:MM_FILEPAGES val:33 [ 39.079609] BUG: Bad rss-counter state mm:00000000e14b77f3 type:MM_ANONPAGES val:22 [ 39.253883] ================================================================== [ 39.255008] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.256076] Read of size 8 at addr ffff88800e235df0 by task sshd/218 [ 39.256861] [ 39.257088] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.257986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.259004] Call Trace: [ 39.259338] [ 39.259637] dump_stack_lvl+0x91/0xf0 [ 39.260166] print_report+0xcc/0x620 [ 39.260653] ? __virt_addr_valid+0x102/0x340 [ 39.261231] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.261894] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.262574] kasan_report+0xbe/0xf0 [ 39.263097] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.263766] vma_interval_tree_remove+0xc75/0xec0 [ 39.264411] vma_prepare+0xc54/0x11a0 [ 39.264897] __split_vma+0x5af/0x950 [ 39.265402] ? __pfx___split_vma+0x10/0x10 [ 39.265970] ? find_held_lock+0x2c/0x110 [ 39.266555] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.267174] ? lock_is_held_type+0x9f/0x120 [ 39.267753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.268398] ? mtree_range_walk+0x632/0x900 [ 39.268959] ? mas_walk+0x5c7/0x7c0 [ 39.269486] do_vmi_munmap+0x1f1/0x2b0 [ 39.270020] mmap_region+0x1f9/0x2660 [ 39.270555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.271115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.271895] ? __pfx_lock_acquire+0x10/0x10 [ 39.272460] ? __pfx_mmap_region+0x10/0x10 [ 39.273003] ? security_mmap_addr+0x7d/0xa0 [ 39.273582] ? get_unmapped_area+0x1f5/0x3f0 [ 39.274216] do_mmap+0x854/0xf00 [ 39.274724] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.275237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.275820] ksys_mmap_pgoff+0x3af/0x500 [ 39.276325] do_syscall_64+0x3f/0x90 [ 39.276780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.277391] RIP: 0033:0x7fc096427d82 [ 39.277825] 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 [ 39.279835] RSP: 002b:00007ffcedc27158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.280685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc096427d82 [ 39.281481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc095861000 [ 39.282279] RBP: 00007fc095861000 R08: 0000000000000009 R09: 0000000000001000 [ 39.283070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a98d0cf70 [ 39.284060] R13: 00007ffcedc27170 R14: 00007ffcedc271a0 R15: 00007ffcedc27500 [ 39.285076] [ 39.285421] [ 39.285673] Allocated by task 211: [ 39.286197] kasan_save_stack+0x22/0x50 [ 39.286788] kasan_set_track+0x25/0x30 [ 39.287367] __kasan_slab_alloc+0x59/0x70 [ 39.287984] kmem_cache_alloc+0x16b/0x370 [ 39.288594] vm_area_dup+0x20/0x160 [ 39.289128] __split_vma+0x170/0x950 [ 39.289673] split_vma+0xc6/0x110 [ 39.290198] mprotect_fixup+0x8d2/0xb30 [ 39.290781] do_mprotect_pkey+0x87e/0xd40 [ 39.291392] __x64_sys_mprotect+0x78/0xc0 [ 39.291999] do_syscall_64+0x3f/0x90 [ 39.292553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.293301] [ 39.293551] Freed by task 211: [ 39.294007] kasan_save_stack+0x22/0x50 [ 39.294618] kasan_set_track+0x25/0x30 [ 39.295206] kasan_save_free_info+0x2b/0x50 [ 39.295832] __kasan_slab_free+0x10a/0x190 [ 39.296462] kmem_cache_free+0x10d/0x4d0 [ 39.297061] rcu_core+0x8c8/0x2860 [ 39.297583] __do_softirq+0x1b7/0x7d4 [ 39.298153] [ 39.298411] Last potentially related work creation: [ 39.299097] kasan_save_stack+0x22/0x50 [ 39.299683] __kasan_record_aux_stack+0x8e/0xa0 [ 39.300360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.301112] remove_vma+0x139/0x170 [ 39.301641] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.302299] do_vmi_munmap+0x1f1/0x2b0 [ 39.302864] __vm_munmap+0x138/0x3a0 [ 39.303416] __x64_sys_munmap+0x59/0x80 [ 39.303999] do_syscall_64+0x3f/0x90 [ 39.304561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.305320] [ 39.305571] The buggy address belongs to the object at ffff88800e235d98 [ 39.305571] which belongs to the cache vm_area_struct of size 168 [ 39.307334] The buggy address is located 88 bytes inside of [ 39.307334] freed 168-byte region [ffff88800e235d98, ffff88800e235e40) [ 39.308992] [ 39.309247] The buggy address belongs to the physical page: [ 39.310023] page:00000000521d15a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe235 [ 39.311175] memcg:ffff88801989fc01 [ 39.311624] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.312356] page_type: 0xffffffff() [ 39.312834] raw: 0100000000000200 ffff8880087a0c80 ffffea000031fb00 dead000000000007 [ 39.313798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801989fc01 [ 39.314765] page dumped because: kasan: bad access detected [ 39.315462] [ 39.315692] Memory state around the buggy address: [ 39.316307] ffff88800e235c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.317208] ffff88800e235d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.318105] >ffff88800e235d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.319002] ^ [ 39.319855] ffff88800e235e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.320807] ffff88800e235e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.321771] ================================================================== [ 39.322787] Disabling lock debugging due to kernel taint [ 41.394430] BUG: Bad rss-counter state mm:00000000bad23f5a type:MM_FILEPAGES val:33 [ 41.395583] BUG: Bad rss-counter state mm:00000000bad23f5a type:MM_ANONPAGES val:22 [ 41.808735] BUG: Bad rss-counter state mm:000000007e5466a6 type:MM_FILEPAGES val:33 [ 41.809755] BUG: Bad rss-counter state mm:000000007e5466a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61651' (ECDSA) to the list of known hosts. 2023/06/20 11:11:24 fuzzer started 2023/06/20 11:11:25 dialing manager at localhost:36067 2023/06/20 11:11:25 checking machine... 2023/06/20 11:11:25 checking revisions... [ 42.472928] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:11:25 testing simple program... [ 42.521426] cgroup: Unknown subsys name 'net' [ 42.562893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:11:24 Registers: info registers vcpu 0 RAX=ffffed100327b6ae RBX=ffffed100327b6af RCX=ffffffff81978981 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff8880193db570 RBP=ffffed100327b6ae RSP=ffff888015b9f8a8 R8 =0000000000000000 R9 =ffffed100327b6ae R10=ffff8880193db577 R11=00000000000b6a61 R12=ffffea00006e2540 R13=0000000000000000 R14=0000000000000a01 R15=dffffc0000000000 RIP=ffffffff8180f0a4 RFL=00000202 [-------] 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 00007fa85ffff700 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=00007f34cf506970 CR3=0000000016ec8000 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=2034323a31313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f3c35449366 RCX=0000000000000100 RDX=ffff8880165e3680 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=00007f3c35449366 RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880165e3680 R15=ffff88800db6cd00 RIP=ffffffff811fc7d5 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 00007f3c34f56900 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=00007ffd9381e000 CR3=000000000ea0e000 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=6720646572637465733a4d41503d706f 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