syzkaller login: [ 30.729194] BUG: Bad rss-counter state mm:0000000042687d79 type:MM_FILEPAGES val:33 [ 30.730178] BUG: Bad rss-counter state mm:0000000042687d79 type:MM_ANONPAGES val:22 [ 30.892614] ================================================================== [ 30.893518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.894447] Read of size 8 at addr ffff88800d95ed08 by task sshd/219 [ 30.895202] [ 30.895418] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.896441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.897405] Call Trace: [ 30.897724] [ 30.898009] dump_stack_lvl+0x91/0xf0 [ 30.898505] print_report+0xcc/0x620 [ 30.898983] ? __virt_addr_valid+0x102/0x340 [ 30.899547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.900175] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.900791] kasan_report+0xbe/0xf0 [ 30.901272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.901886] vma_interval_tree_remove+0xc75/0xec0 [ 30.902480] vma_prepare+0xc54/0x11a0 [ 30.902960] __split_vma+0x5af/0x950 [ 30.903430] ? __pfx___split_vma+0x10/0x10 [ 30.903970] ? find_held_lock+0x2c/0x110 [ 30.904484] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.905036] ? lock_is_held_type+0x9f/0x120 [ 30.905572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.906172] ? mtree_range_walk+0x632/0x900 [ 30.906713] ? mas_walk+0x5c7/0x7c0 [ 30.907185] do_vmi_munmap+0x1f1/0x2b0 [ 30.907690] mmap_region+0x1f9/0x2660 [ 30.908166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.908677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.909380] ? __pfx_lock_acquire+0x10/0x10 [ 30.909912] ? __pfx_mmap_region+0x10/0x10 [ 30.910436] ? security_mmap_addr+0x7d/0xa0 [ 30.910959] ? get_unmapped_area+0x1f5/0x3f0 [ 30.911520] do_mmap+0x854/0xf00 [ 30.911963] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.912452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.913009] ksys_mmap_pgoff+0x3af/0x500 [ 30.913521] do_syscall_64+0x3f/0x90 [ 30.913999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914641] RIP: 0033:0x7fdc391edd82 [ 30.915096] 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 [ 30.917204] RSP: 002b:00007ffe294c59c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.918117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc391edd82 [ 30.918966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc38627000 [ 30.919812] RBP: 00007fdc38627000 R08: 0000000000000009 R09: 0000000000001000 [ 30.920644] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580d87d0ec0 [ 30.921479] R13: 00007ffe294c59e0 R14: 00007ffe294c5a10 R15: 00007ffe294c5d70 [ 30.922329] [ 30.922620] [ 30.922834] Allocated by task 212: [ 30.923259] kasan_save_stack+0x22/0x50 [ 30.923785] kasan_set_track+0x25/0x30 [ 30.924268] __kasan_slab_alloc+0x59/0x70 [ 30.924783] kmem_cache_alloc+0x16b/0x370 [ 30.925293] vm_area_dup+0x20/0x160 [ 30.925749] __split_vma+0x170/0x950 [ 30.926212] split_vma+0xc6/0x110 [ 30.926646] mprotect_fixup+0x8d2/0xb30 [ 30.927146] do_mprotect_pkey+0x87e/0xd40 [ 30.927668] __x64_sys_mprotect+0x78/0xc0 [ 30.928187] do_syscall_64+0x3f/0x90 [ 30.928659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.929293] [ 30.929510] Freed by task 202: [ 30.929907] kasan_save_stack+0x22/0x50 [ 30.930405] kasan_set_track+0x25/0x30 [ 30.930895] kasan_save_free_info+0x2b/0x50 [ 30.931424] __kasan_slab_free+0x10a/0x190 [ 30.931973] kmem_cache_free+0x10d/0x4d0 [ 30.932474] rcu_core+0x8c8/0x2860 [ 30.932910] __do_softirq+0x1b7/0x7d4 [ 30.933383] [ 30.933601] Last potentially related work creation: [ 30.934185] kasan_save_stack+0x22/0x50 [ 30.934689] __kasan_record_aux_stack+0x8e/0xa0 [ 30.935259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.935924] remove_vma+0x139/0x170 [ 30.936371] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.936927] do_vmi_munmap+0x1f1/0x2b0 [ 30.937412] __vm_munmap+0x138/0x3a0 [ 30.937879] __x64_sys_munmap+0x59/0x80 [ 30.938458] do_syscall_64+0x3f/0x90 [ 30.938928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.939570] [ 30.939787] The buggy address belongs to the object at ffff88800d95ecb0 [ 30.939787] which belongs to the cache vm_area_struct of size 168 [ 30.941239] The buggy address is located 88 bytes inside of [ 30.941239] freed 168-byte region [ffff88800d95ecb0, ffff88800d95ed58) [ 30.942636] [ 30.942849] The buggy address belongs to the physical page: [ 30.943529] page:00000000f0e4daf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd95e [ 30.944598] memcg:ffff88800daa0a01 [ 30.945029] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.945717] page_type: 0xffffffff() [ 30.946162] raw: 0100000000000200 ffff88800879fc80 ffffea0000378940 dead000000000003 [ 30.947076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daa0a01 [ 30.947985] page dumped because: kasan: bad access detected [ 30.948640] [ 30.948855] Memory state around the buggy address: [ 30.949424] ffff88800d95ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.950264] ffff88800d95ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.951114] >ffff88800d95ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.951962] ^ [ 30.952395] ffff88800d95ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.953239] ffff88800d95ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.954084] ================================================================== [ 30.955113] Disabling lock debugging due to kernel taint [ 32.889714] BUG: Bad rss-counter state mm:00000000e0c3ef8b type:MM_FILEPAGES val:33 [ 32.890744] BUG: Bad rss-counter state mm:00000000e0c3ef8b type:MM_ANONPAGES val:22 [ 33.417026] BUG: Bad rss-counter state mm:000000000ae2e04e type:MM_FILEPAGES val:33 [ 33.418188] BUG: Bad rss-counter state mm:000000000ae2e04e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2199' (ECDSA) to the list of known hosts. 2023/06/20 02:25:23 fuzzer started 2023/06/20 02:25:23 dialing manager at localhost:44161 2023/06/20 02:25:23 checking machine... 2023/06/20 02:25:23 checking revisions... [ 34.049957] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:25:23 testing simple program... [ 34.106237] cgroup: Unknown subsys name 'net' [ 34.160279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:22 Registers: info registers vcpu 0 RAX=00007ffd7a46e920 RBX=00005642a1025d84 RCX=00007ffd7a46e900 RDX=00007f0bd3f37258 RSI=ffffffffffffffff RDI=00007ffd7a46ea30 RBP=00007ffd7a46ea30 RSP=00007ffd7a46e8f0 R8 =0000000000000000 R9 =0000000000000002 R10=00007f0bd3f37258 R11=00007f0bd3f183c0 R12=00005642a103a3d0 R13=00007ffd7a46eb70 R14=00005642a103d460 R15=00007ffd7a46eb70 RIP=00007f0bd3e1d032 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0bd39b2900 00000000 00000000 GS =0000 0000000000000000 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=00007f0bd3f69618 CR3=000000000fef8000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f420d662780 CR3=000000000c7dc000 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=62d2329539e59291c74b0059dcee8d44 XMM02=ec2efd57dc4c00df000000000011c628 XMM03=33e090ee6df57b0e000000000011c6f8 XMM04=2c54f10a8abe8c5300000000000ae988 XMM05=9e36857bfef68ecd0000000000134548 XMM06=806171799158d96700000000001335e8 XMM07=e042d86d42eb936e0000000000123e90 XMM08=33e090ee6df57b0e000000000011c6f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000