syzkaller login: [ 60.085809] BUG: Bad rss-counter state mm:0000000055279a8f type:MM_FILEPAGES val:33 [ 60.087076] BUG: Bad rss-counter state mm:0000000055279a8f type:MM_ANONPAGES val:22 [ 60.125962] ================================================================== [ 60.127084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.128243] Read of size 8 at addr ffff88800950ab38 by task sshd/226 [ 60.129149] [ 60.129482] CPU: 1 PID: 226 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.130616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.131810] Call Trace: [ 60.132126] <TASK> [ 60.132409] dump_stack_lvl+0x91/0xf0 [ 60.132900] print_report+0xcc/0x620 [ 60.133389] ? __virt_addr_valid+0x102/0x340 [ 60.133941] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.134688] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.135349] kasan_report+0xbe/0xf0 [ 60.135841] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.136591] vma_interval_tree_remove+0xc75/0xec0 [ 60.137325] vma_prepare+0xc54/0x11a0 [ 60.137814] __split_vma+0x5af/0x950 [ 60.138383] ? __pfx___split_vma+0x10/0x10 [ 60.139001] ? find_held_lock+0x2c/0x110 [ 60.139646] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.140345] ? lock_is_held_type+0x9f/0x120 [ 60.140885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.141497] ? mtree_range_walk+0x632/0x900 [ 60.142044] ? mas_walk+0x5c7/0x7c0 [ 60.142529] do_vmi_munmap+0x1f1/0x2b0 [ 60.143021] mmap_region+0x1f9/0x2660 [ 60.143518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.144027] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.144755] ? __pfx_lock_acquire+0x10/0x10 [ 60.145288] ? __pfx_mmap_region+0x10/0x10 [ 60.145832] ? security_mmap_addr+0x7d/0xa0 [ 60.146369] ? get_unmapped_area+0x1f5/0x3f0 [ 60.146916] do_mmap+0x854/0xf00 [ 60.147367] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.147868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.148427] ksys_mmap_pgoff+0x3af/0x500 [ 60.148940] do_syscall_64+0x3f/0x90 [ 60.149424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.150068] RIP: 0033:0x7f06025d3d82 [ 60.150521] 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 [ 60.152685] RSP: 002b:00007ffc98d063d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.153593] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06025d3d82 [ 60.154436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0601a0d000 [ 60.155288] RBP: 00007f0601a0d000 R08: 0000000000000009 R09: 0000000000001000 [ 60.156140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9e57b9f60 [ 60.156996] R13: 00007ffc98d063f0 R14: 00007ffc98d06420 R15: 00007ffc98d06780 [ 60.157863] </TASK> [ 60.158162] [ 60.158380] Allocated by task 219: [ 60.158816] kasan_save_stack+0x22/0x50 [ 60.159332] kasan_set_track+0x25/0x30 [ 60.159834] __kasan_slab_alloc+0x59/0x70 [ 60.160352] kmem_cache_alloc+0x16b/0x370 [ 60.160867] vm_area_dup+0x20/0x160 [ 60.161326] __split_vma+0x170/0x950 [ 60.161790] split_vma+0xc6/0x110 [ 60.162230] mprotect_fixup+0x8d2/0xb30 [ 60.162735] do_mprotect_pkey+0x87e/0xd40 [ 60.163269] __x64_sys_mprotect+0x78/0xc0 [ 60.163793] do_syscall_64+0x3f/0x90 [ 60.164273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.164912] [ 60.165131] Freed by task 219: [ 60.165518] kasan_save_stack+0x22/0x50 [ 60.166023] kasan_set_track+0x25/0x30 [ 60.166517] kasan_save_free_info+0x2b/0x50 [ 60.167140] __kasan_slab_free+0x10a/0x190 [ 60.167690] kmem_cache_free+0x10d/0x4d0 [ 60.168191] rcu_core+0x8c8/0x2860 [ 60.168634] __do_softirq+0x1b7/0x7d4 [ 60.169111] [ 60.169326] Last potentially related work creation: [ 60.169907] kasan_save_stack+0x22/0x50 [ 60.170410] __kasan_record_aux_stack+0x8e/0xa0 [ 60.170982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.171628] remove_vma+0x139/0x170 [ 60.172077] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.172637] do_vmi_munmap+0x1f1/0x2b0 [ 60.173117] __vm_munmap+0x138/0x3a0 [ 60.173585] __x64_sys_munmap+0x59/0x80 [ 60.174086] do_syscall_64+0x3f/0x90 [ 60.174564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.175207] [ 60.175428] The buggy address belongs to the object at ffff88800950aae0 [ 60.175428] which belongs to the cache vm_area_struct of size 168 [ 60.176890] The buggy address is located 88 bytes inside of [ 60.176890] freed 168-byte region [ffff88800950aae0, ffff88800950ab88) [ 60.178283] [ 60.178501] The buggy address belongs to the physical page: [ 60.179159] page:00000000b20b1274 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x950a [ 60.180261] memcg:ffff88800f5a7001 [ 60.180685] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.181343] page_type: 0xffffffff() [ 60.181802] raw: 0100000000000200 ffff88800879fc80 ffffea00003bb180 dead000000000002 [ 60.182734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5a7001 [ 60.183661] page dumped because: kasan: bad access detected [ 60.184326] [ 60.184540] Memory state around the buggy address: [ 60.185118] ffff88800950aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.185974] ffff88800950aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 60.186828] >ffff88800950ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.187690] ^ [ 60.188301] ffff88800950ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.189152] ffff88800950ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.189999] ================================================================== [ 60.191061] Disabling lock debugging due to kernel taint [ 62.970558] BUG: Bad rss-counter state mm:00000000cad69bb1 type:MM_FILEPAGES val:33 [ 62.971336] BUG: Bad rss-counter state mm:00000000cad69bb1 type:MM_ANONPAGES val:22 [ 63.482048] BUG: Bad rss-counter state mm:00000000e6d99e35 type:MM_FILEPAGES val:33 [ 63.483202] BUG: Bad rss-counter state mm:00000000e6d99e35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15510' (ECDSA) to the list of known hosts. 2023/06/19 13:27:49 fuzzer started 2023/06/19 13:27:49 dialing manager at localhost:44161 2023/06/19 13:27:49 checking machine... 2023/06/19 13:27:49 checking revisions... [ 64.100240] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:27:50 testing simple program... [ 64.152080] cgroup: Unknown subsys name 'net' [ 64.192019] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888017c051c0 RSI=ffffffff83ab4224 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f03f4f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000015b9000015b9 R12=0000000000000000 R13=0000000000000038 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff81374468 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 00007ff7d493b900 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=00007ff7d4ef2618 CR3=000000000c582000 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=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=00007f376cc03e80 CR3=0000000013ad6000 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=24393a955c6c67bee24b16fd6ce43e4d XMM02=ec2efd57dc4c00df00000000001215d8 XMM03=afd270c4e4b5321d00000000001216a8 XMM04=fa618260f59e371700000000000ae988 XMM05=1a58cb52dc18f6d70000000000138e20 XMM06=94aac670ef06ff650000000000138ca8 XMM07=e042d86d42eb936e0000000000128e60 XMM08=afd270c4e4b5321d00000000001216a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000