syzkaller login: [ 32.538523] BUG: Bad rss-counter state mm:000000000a98444c type:MM_FILEPAGES val:33 [ 32.540417] BUG: Bad rss-counter state mm:000000000a98444c type:MM_ANONPAGES val:22 [ 32.725252] ================================================================== [ 32.726148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.727088] Read of size 8 at addr ffff88801a3db968 by task sshd/221 [ 32.727859] [ 32.728081] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.729074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.730057] Call Trace: [ 32.730376] [ 32.730663] dump_stack_lvl+0x91/0xf0 [ 32.731152] print_report+0xcc/0x620 [ 32.731638] ? __virt_addr_valid+0x102/0x340 [ 32.732196] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.732827] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.733449] kasan_report+0xbe/0xf0 [ 32.733922] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.734542] vma_interval_tree_remove+0xc75/0xec0 [ 32.735163] vma_prepare+0xc54/0x11a0 [ 32.735660] __split_vma+0x5af/0x950 [ 32.736142] ? __pfx___split_vma+0x10/0x10 [ 32.736705] ? find_held_lock+0x2c/0x110 [ 32.737228] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.737797] ? lock_is_held_type+0x9f/0x120 [ 32.738340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.738963] ? mtree_range_walk+0x632/0x900 [ 32.739528] ? mas_walk+0x5c7/0x7c0 [ 32.740011] do_vmi_munmap+0x1f1/0x2b0 [ 32.740521] mmap_region+0x1f9/0x2660 [ 32.741006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.741522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.742261] ? __pfx_lock_acquire+0x10/0x10 [ 32.742817] ? __pfx_mmap_region+0x10/0x10 [ 32.743352] ? security_mmap_addr+0x7d/0xa0 [ 32.743899] ? get_unmapped_area+0x1f5/0x3f0 [ 32.744477] do_mmap+0x854/0xf00 [ 32.744944] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.745442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.746018] ksys_mmap_pgoff+0x3af/0x500 [ 32.746536] do_syscall_64+0x3f/0x90 [ 32.747017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.747685] RIP: 0033:0x7f965ec0ed82 [ 32.748156] 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 [ 32.750371] RSP: 002b:00007ffe6680b388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.751293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f965ec0ed82 [ 32.752167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f965e048000 [ 32.753024] RBP: 00007f965e048000 R08: 0000000000000009 R09: 0000000000001000 [ 32.753885] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de6e6b3980 [ 32.754747] R13: 00007ffe6680b3a0 R14: 00007ffe6680b3d0 R15: 00007ffe6680b730 [ 32.755635] [ 32.755942] [ 32.756163] Allocated by task 214: [ 32.756634] kasan_save_stack+0x22/0x50 [ 32.757149] kasan_set_track+0x25/0x30 [ 32.757658] __kasan_slab_alloc+0x59/0x70 [ 32.758202] kmem_cache_alloc+0x16b/0x370 [ 32.758726] vm_area_dup+0x20/0x160 [ 32.759191] __split_vma+0x170/0x950 [ 32.759675] split_vma+0xc6/0x110 [ 32.760123] mprotect_fixup+0x8d2/0xb30 [ 32.760644] do_mprotect_pkey+0x87e/0xd40 [ 32.761165] __x64_sys_mprotect+0x78/0xc0 [ 32.761685] do_syscall_64+0x3f/0x90 [ 32.762164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.762813] [ 32.763034] Freed by task 214: [ 32.763433] kasan_save_stack+0x22/0x50 [ 32.763951] kasan_set_track+0x25/0x30 [ 32.764451] kasan_save_free_info+0x2b/0x50 [ 32.765000] __kasan_slab_free+0x10a/0x190 [ 32.765548] kmem_cache_free+0x10d/0x4d0 [ 32.766063] rcu_core+0x8c8/0x2860 [ 32.766519] __do_softirq+0x1b7/0x7d4 [ 32.767006] [ 32.767223] Last potentially related work creation: [ 32.767831] kasan_save_stack+0x22/0x50 [ 32.768344] __kasan_record_aux_stack+0x8e/0xa0 [ 32.768953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.769612] remove_vma+0x139/0x170 [ 32.770067] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.770645] do_vmi_munmap+0x1f1/0x2b0 [ 32.771145] __vm_munmap+0x138/0x3a0 [ 32.771617] __x64_sys_munmap+0x59/0x80 [ 32.772126] do_syscall_64+0x3f/0x90 [ 32.772612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.773260] [ 32.773477] The buggy address belongs to the object at ffff88801a3db910 [ 32.773477] which belongs to the cache vm_area_struct of size 168 [ 32.774966] The buggy address is located 88 bytes inside of [ 32.774966] freed 168-byte region [ffff88801a3db910, ffff88801a3db9b8) [ 32.776403] [ 32.776639] The buggy address belongs to the physical page: [ 32.777328] page:0000000062ad2840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3db [ 32.778447] memcg:ffff888009511b01 [ 32.778880] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.779542] page_type: 0xffffffff() [ 32.779995] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.780937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009511b01 [ 32.781868] page dumped because: kasan: bad access detected [ 32.782546] [ 32.782763] Memory state around the buggy address: [ 32.783349] ffff88801a3db800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.784221] ffff88801a3db880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.785117] >ffff88801a3db900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.785985] ^ [ 32.786775] ffff88801a3db980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.787640] ffff88801a3dba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.788522] ================================================================== [ 32.789521] Disabling lock debugging due to kernel taint [ 34.987245] BUG: Bad rss-counter state mm:00000000e6a2db76 type:MM_FILEPAGES val:33 [ 34.987937] BUG: Bad rss-counter state mm:00000000e6a2db76 type:MM_ANONPAGES val:22 [ 35.427885] BUG: Bad rss-counter state mm:00000000b1ddf990 type:MM_FILEPAGES val:33 [ 35.428715] BUG: Bad rss-counter state mm:00000000b1ddf990 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56751' (ECDSA) to the list of known hosts. 2023/06/19 16:18:45 fuzzer started 2023/06/19 16:18:45 dialing manager at localhost:44161 2023/06/19 16:18:45 checking machine... 2023/06/19 16:18:45 checking revisions... [ 36.114214] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:18:45 testing simple program... [ 36.160407] cgroup: Unknown subsys name 'net' [ 36.218706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:18:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff96cf06af0 CR3=00000000096c2000 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=2035343a38313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a38313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f6993930af0 RCX=00007f6993930f20 RDX=0000000000000001 RSI=00007f6993f07740 RDI=00007f699333c000 RBP=00007f699333c000 RSP=00007ffc7daefe00 R8 =0000560e8aab30d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=00007f6993930b10 R13=00007f6993930ae8 R14=0000000000000020 R15=0000000000000000 RIP=00007f69937aeb24 RFL=00000202 [-------] 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 00007f699337c900 00000000 00000000 GS =0000 0000000000000000 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=00007f6993341008 CR3=000000000ea6c000 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=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