syzkaller login: [ 38.706229] BUG: Bad rss-counter state mm:000000003ed3e81f type:MM_FILEPAGES val:33 [ 38.707257] BUG: Bad rss-counter state mm:000000003ed3e81f type:MM_ANONPAGES val:22 [ 38.875981] ================================================================== [ 38.877109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.878248] Read of size 8 at addr ffff88800e443228 by task sshd/218 [ 38.879279] [ 38.879498] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.880396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.881398] Call Trace: [ 38.881719] [ 38.882003] dump_stack_lvl+0x91/0xf0 [ 38.882508] print_report+0xcc/0x620 [ 38.883011] ? __virt_addr_valid+0x102/0x340 [ 38.883571] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884196] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884818] kasan_report+0xbe/0xf0 [ 38.885294] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885924] vma_interval_tree_remove+0xc75/0xec0 [ 38.886533] vma_prepare+0xc54/0x11a0 [ 38.887028] __split_vma+0x5af/0x950 [ 38.887505] ? __pfx___split_vma+0x10/0x10 [ 38.888043] ? find_held_lock+0x2c/0x110 [ 38.888572] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.889140] ? lock_is_held_type+0x9f/0x120 [ 38.889686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.890299] ? mtree_range_walk+0x632/0x900 [ 38.890883] ? mas_walk+0x5c7/0x7c0 [ 38.891399] do_vmi_munmap+0x1f1/0x2b0 [ 38.891911] mmap_region+0x1f9/0x2660 [ 38.892463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.892973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.893683] ? __pfx_lock_acquire+0x10/0x10 [ 38.894257] ? __pfx_mmap_region+0x10/0x10 [ 38.894800] ? security_mmap_addr+0x7d/0xa0 [ 38.895412] ? get_unmapped_area+0x1f5/0x3f0 [ 38.895965] do_mmap+0x854/0xf00 [ 38.896401] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.896904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.897503] ksys_mmap_pgoff+0x3af/0x500 [ 38.898047] do_syscall_64+0x3f/0x90 [ 38.898568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899270] RIP: 0033:0x7ff04dd5ad82 [ 38.899734] 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 [ 38.901950] RSP: 002b:00007ffd8e5bdd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.902954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff04dd5ad82 [ 38.903810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff04d194000 [ 38.904682] RBP: 00007ff04d194000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905611] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e46c31b20 [ 38.906547] R13: 00007ffd8e5bdd70 R14: 00007ffd8e5bdda0 R15: 00007ffd8e5be100 [ 38.907447] [ 38.907742] [ 38.907962] Allocated by task 211: [ 38.908387] kasan_save_stack+0x22/0x50 [ 38.908892] kasan_set_track+0x25/0x30 [ 38.909410] __kasan_slab_alloc+0x59/0x70 [ 38.909954] kmem_cache_alloc+0x16b/0x370 [ 38.910534] vm_area_dup+0x20/0x160 [ 38.911009] __split_vma+0x170/0x950 [ 38.911480] split_vma+0xc6/0x110 [ 38.911922] mprotect_fixup+0x8d2/0xb30 [ 38.912427] do_mprotect_pkey+0x87e/0xd40 [ 38.912962] __x64_sys_mprotect+0x78/0xc0 [ 38.913526] do_syscall_64+0x3f/0x90 [ 38.914035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914742] [ 38.914964] Freed by task 211: [ 38.915356] kasan_save_stack+0x22/0x50 [ 38.915864] kasan_set_track+0x25/0x30 [ 38.916357] kasan_save_free_info+0x2b/0x50 [ 38.916891] __kasan_slab_free+0x10a/0x190 [ 38.917463] kmem_cache_free+0x10d/0x4d0 [ 38.917990] rcu_core+0x8c8/0x2860 [ 38.918501] __do_softirq+0x1b7/0x7d4 [ 38.919001] [ 38.919217] Last potentially related work creation: [ 38.919800] kasan_save_stack+0x22/0x50 [ 38.920366] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921630] remove_vma+0x139/0x170 [ 38.922127] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922746] do_vmi_munmap+0x1f1/0x2b0 [ 38.923235] __vm_munmap+0x138/0x3a0 [ 38.923712] __x64_sys_munmap+0x59/0x80 [ 38.924214] do_syscall_64+0x3f/0x90 [ 38.924688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925341] [ 38.925558] Second to last potentially related work creation: [ 38.926238] kasan_save_stack+0x22/0x50 [ 38.926755] __kasan_record_aux_stack+0x8e/0xa0 [ 38.927375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.928047] remove_vma+0x139/0x170 [ 38.928561] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.929129] do_vmi_munmap+0x1f1/0x2b0 [ 38.929613] mmap_region+0x1f9/0x2660 [ 38.930090] do_mmap+0x854/0xf00 [ 38.930528] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931053] ksys_mmap_pgoff+0x3af/0x500 [ 38.931578] do_syscall_64+0x3f/0x90 [ 38.932082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932786] [ 38.933021] The buggy address belongs to the object at ffff88800e4431d0 [ 38.933021] which belongs to the cache vm_area_struct of size 168 [ 38.934520] The buggy address is located 88 bytes inside of [ 38.934520] freed 168-byte region [ffff88800e4431d0, ffff88800e443278) [ 38.935960] [ 38.936177] The buggy address belongs to the physical page: [ 38.936858] page:0000000087b7d4dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe443 [ 38.938026] memcg:ffff88800e4c8b01 [ 38.938532] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.939277] page_type: 0xffffffff() [ 38.939749] raw: 0100000000000200 ffff8880087a0c80 ffffea000039da80 dead000000000003 [ 38.940722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4c8b01 [ 38.941747] page dumped because: kasan: bad access detected [ 38.942513] [ 38.942747] Memory state around the buggy address: [ 38.943361] ffff88800e443100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.944263] ffff88800e443180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.945216] >ffff88800e443200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.946143] ^ [ 38.946782] ffff88800e443280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.947685] ffff88800e443300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.948586] ================================================================== [ 38.949611] Disabling lock debugging due to kernel taint [ 40.670128] BUG: Bad rss-counter state mm:0000000040d680fb type:MM_FILEPAGES val:33 [ 40.671480] BUG: Bad rss-counter state mm:0000000040d680fb type:MM_ANONPAGES val:22 [ 41.211163] BUG: Bad rss-counter state mm:000000002f66ee27 type:MM_FILEPAGES val:33 [ 41.212314] BUG: Bad rss-counter state mm:000000002f66ee27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54443' (ECDSA) to the list of known hosts. 2023/06/21 01:49:27 fuzzer started 2023/06/21 01:49:27 dialing manager at localhost:36067 2023/06/21 01:49:27 checking machine... 2023/06/21 01:49:27 checking revisions... [ 41.936080] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:49:27 testing simple program... [ 41.987245] cgroup: Unknown subsys name 'net' [ 42.050240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:49:27 Registers: info registers vcpu 0 RAX=1ffff110032388ab RBX=ffff8880191c4528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880191c4558 RBP=ffff8880163b0000 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880163ad500 R14=ffffffff818d9c06 R15=ffff88800f264d80 RIP=ffffffff818464e2 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f12e1fe3900 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=00007f12e259b0b0 CR3=0000000013a52000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=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=00007f4c5df71b60 CR3=0000000008ec4000 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=8260280e335876a6ea44f763c0aeab66 XMM02=000000000011be80eff9b2d0a8fce9cb XMM03=000000000011bf502c67c8bc2e329bc3 XMM04=6a16185cb782713100000000000ae988 XMM05=751b9502027dc0b90000000000132f50 XMM06=5363074c16cca8b30000000000132128 XMM07=e042d86d42eb936e00000000001223d0 XMM08=93f3dab94b675ee2000000000011bf50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000