syzkaller login: [ 29.496957] BUG: Bad rss-counter state mm:000000004206b819 type:MM_FILEPAGES val:33 [ 29.498355] BUG: Bad rss-counter state mm:000000004206b819 type:MM_ANONPAGES val:22 [ 29.639445] ================================================================== [ 29.640265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.640992] Read of size 8 at addr ffff88800ef97c20 by task sshd/221 [ 29.641580] [ 29.641754] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.642588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.643350] Call Trace: [ 29.643595] [ 29.643817] dump_stack_lvl+0x91/0xf0 [ 29.644195] print_report+0xcc/0x620 [ 29.644581] ? __virt_addr_valid+0x102/0x340 [ 29.645070] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.645554] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.646032] kasan_report+0xbe/0xf0 [ 29.646400] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.646918] vma_interval_tree_remove+0xc75/0xec0 [ 29.647388] vma_prepare+0xc54/0x11a0 [ 29.647765] __split_vma+0x5af/0x950 [ 29.648068] ? __pfx___split_vma+0x10/0x10 [ 29.648386] ? find_held_lock+0x2c/0x110 [ 29.648697] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.649044] ? lock_is_held_type+0x9f/0x120 [ 29.649371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.649734] ? mtree_range_walk+0x632/0x900 [ 29.650075] ? mas_walk+0x5c7/0x7c0 [ 29.650361] do_vmi_munmap+0x1f1/0x2b0 [ 29.650654] mmap_region+0x1f9/0x2660 [ 29.650960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.651267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.651700] ? __pfx_lock_acquire+0x10/0x10 [ 29.652031] ? __pfx_mmap_region+0x10/0x10 [ 29.652345] ? security_mmap_addr+0x7d/0xa0 [ 29.652665] ? get_unmapped_area+0x1f5/0x3f0 [ 29.653009] do_mmap+0x854/0xf00 [ 29.653273] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.653569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.653915] ksys_mmap_pgoff+0x3af/0x500 [ 29.654220] do_syscall_64+0x3f/0x90 [ 29.654508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.654913] RIP: 0033:0x7f7a24f4dd82 [ 29.655186] 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 [ 29.656463] RSP: 002b:00007ffcec2c3058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.657009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a24f4dd82 [ 29.657511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a24387000 [ 29.658023] RBP: 00007f7a24387000 R08: 0000000000000009 R09: 0000000000001000 [ 29.658535] R10: 0000000000000812 R11: 0000000000000206 R12: 000055958d7c8ec0 [ 29.659059] R13: 00007ffcec2c3070 R14: 00007ffcec2c30a0 R15: 00007ffcec2c3400 [ 29.659587] [ 29.659766] [ 29.659901] Allocated by task 214: [ 29.660156] kasan_save_stack+0x22/0x50 [ 29.660458] kasan_set_track+0x25/0x30 [ 29.660756] __kasan_slab_alloc+0x59/0x70 [ 29.661082] kmem_cache_alloc+0x16b/0x370 [ 29.661390] vm_area_dup+0x20/0x160 [ 29.661664] __split_vma+0x170/0x950 [ 29.661950] split_vma+0xc6/0x110 [ 29.662215] mprotect_fixup+0x8d2/0xb30 [ 29.662514] do_mprotect_pkey+0x87e/0xd40 [ 29.662836] __x64_sys_mprotect+0x78/0xc0 [ 29.663145] do_syscall_64+0x3f/0x90 [ 29.663423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.663815] [ 29.663945] Freed by task 214: [ 29.664178] kasan_save_stack+0x22/0x50 [ 29.664477] kasan_set_track+0x25/0x30 [ 29.664779] kasan_save_free_info+0x2b/0x50 [ 29.665100] __kasan_slab_free+0x10a/0x190 [ 29.665418] kmem_cache_free+0x10d/0x4d0 [ 29.665724] rcu_core+0x8c8/0x2860 [ 29.665997] __do_softirq+0x1b7/0x7d4 [ 29.666285] [ 29.666412] Last potentially related work creation: [ 29.666777] kasan_save_stack+0x22/0x50 [ 29.667079] __kasan_record_aux_stack+0x8e/0xa0 [ 29.667420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.667812] remove_vma+0x139/0x170 [ 29.668082] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.668414] do_vmi_munmap+0x1f1/0x2b0 [ 29.668704] __vm_munmap+0x138/0x3a0 [ 29.668995] __x64_sys_munmap+0x59/0x80 [ 29.669289] do_syscall_64+0x3f/0x90 [ 29.669570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.669963] [ 29.670092] Second to last potentially related work creation: [ 29.670501] kasan_save_stack+0x22/0x50 [ 29.670819] __kasan_record_aux_stack+0x8e/0xa0 [ 29.671162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.671541] remove_vma+0x139/0x170 [ 29.671816] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.672150] do_vmi_munmap+0x1f1/0x2b0 [ 29.672441] mmap_region+0x1f9/0x2660 [ 29.672721] do_mmap+0x854/0xf00 [ 29.672988] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.673281] ksys_mmap_pgoff+0x3af/0x500 [ 29.673582] do_syscall_64+0x3f/0x90 [ 29.673877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.674260] [ 29.674386] The buggy address belongs to the object at ffff88800ef97bc8 [ 29.674386] which belongs to the cache vm_area_struct of size 168 [ 29.675275] The buggy address is located 88 bytes inside of [ 29.675275] freed 168-byte region [ffff88800ef97bc8, ffff88800ef97c70) [ 29.676125] [ 29.676254] The buggy address belongs to the physical page: [ 29.676647] page:0000000030e701ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef97 [ 29.677303] memcg:ffff88800e8b2801 [ 29.677558] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.677966] page_type: 0xffffffff() [ 29.678236] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ec80 dead000000000008 [ 29.678810] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b2801 [ 29.679360] page dumped because: kasan: bad access detected [ 29.679771] [ 29.679901] Memory state around the buggy address: [ 29.680253] ffff88800ef97b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.680770] ffff88800ef97b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.681289] >ffff88800ef97c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.681808] ^ [ 29.682140] ffff88800ef97c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.682648] ffff88800ef97d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.683274] ================================================================== [ 29.683823] Disabling lock debugging due to kernel taint [ 32.182895] BUG: Bad rss-counter state mm:000000009a4361d2 type:MM_FILEPAGES val:33 [ 32.184153] BUG: Bad rss-counter state mm:000000009a4361d2 type:MM_ANONPAGES val:22 [ 32.643017] BUG: Bad rss-counter state mm:000000000db57106 type:MM_FILEPAGES val:33 [ 32.644012] BUG: Bad rss-counter state mm:000000000db57106 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7596' (ECDSA) to the list of known hosts. 2023/06/21 05:28:05 fuzzer started 2023/06/21 05:28:05 dialing manager at localhost:36067 2023/06/21 05:28:06 checking machine... 2023/06/21 05:28:06 checking revisions... [ 33.343233] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:28:06 testing simple program... [ 33.392724] cgroup: Unknown subsys name 'net' [ 33.450115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:28:05 Registers: info registers vcpu 0 RAX=0000000000000006 RBX=0000000000133920 RCX=00007f2747c67344 RDX=00007fff1a6e6e18 RSI=00007fff1a6e6e18 RDI=000056097bf10330 RBP=00007fff1a6e6e98 RSP=00007fff1a6e6e10 R8 =0000000000000038 R9 =0000000000133920 R10=0000000000000002 R11=000000000000de48 R12=00007f2746602920 R13=000056097bf187d0 R14=0000000000000006 R15=00007fff1a6e6e20 RIP=00007f2747c67497 RFL=00000297 [--S-APC] 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 00007f27470e4900 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=00007f2746570f10 CR3=000000000d746000 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=48e266253c226b9fb146b22f6bbdd31e XMM02=000000000011db78eff9b2d0a8fce9cb XMM03=000000000011dc482c67c8bc2e329bc3 XMM04=129294767f7e612e00000000000ae988 XMM05=3ed9a2fb8ad7dc0e0000000000134560 XMM06=94b0e9d621454ebc0000000000133300 XMM07=fb795ef6d657705600000000001222b0 XMM08=2c67c8bc2e329bc3000000000011dbe8 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=00007fff42aea6c8 CR3=0000000005482000 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=00007f3a3d8af510000055a8a5c9f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000