syzkaller login: [ 30.449110] BUG: Bad rss-counter state mm:00000000122368df type:MM_FILEPAGES val:33 [ 30.451120] BUG: Bad rss-counter state mm:00000000122368df type:MM_ANONPAGES val:22 [ 30.622662] ================================================================== [ 30.623618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.624611] Read of size 8 at addr ffff88800fc1f968 by task sshd/219 [ 30.625529] [ 30.625758] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.626672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.627696] Call Trace: [ 30.628035] [ 30.628333] dump_stack_lvl+0x91/0xf0 [ 30.628875] print_report+0xcc/0x620 [ 30.629394] ? __virt_addr_valid+0x102/0x340 [ 30.629974] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.631285] kasan_report+0xbe/0xf0 [ 30.631786] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632446] vma_interval_tree_remove+0xc75/0xec0 [ 30.633094] vma_prepare+0xc54/0x11a0 [ 30.633604] __split_vma+0x5af/0x950 [ 30.634112] ? __pfx___split_vma+0x10/0x10 [ 30.634673] ? find_held_lock+0x2c/0x110 [ 30.635239] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.635859] ? lock_is_held_type+0x9f/0x120 [ 30.636443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.637195] ? mtree_range_walk+0x632/0x900 [ 30.637826] ? mas_walk+0x5c7/0x7c0 [ 30.638363] do_vmi_munmap+0x1f1/0x2b0 [ 30.638920] mmap_region+0x1f9/0x2660 [ 30.639468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.640046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.640872] ? __pfx_lock_acquire+0x10/0x10 [ 30.641475] ? __pfx_mmap_region+0x10/0x10 [ 30.642079] ? security_mmap_addr+0x7d/0xa0 [ 30.642681] ? get_unmapped_area+0x1f5/0x3f0 [ 30.643310] do_mmap+0x854/0xf00 [ 30.643805] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.644373] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.645017] ksys_mmap_pgoff+0x3af/0x500 [ 30.645572] do_syscall_64+0x3f/0x90 [ 30.646092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.646784] RIP: 0033:0x7f0d1d2dbd82 [ 30.647283] 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 [ 30.649547] RSP: 002b:00007ffe74b02028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.650509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d1d2dbd82 [ 30.651397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d1c715000 [ 30.652290] RBP: 00007f0d1c715000 R08: 0000000000000009 R09: 0000000000001000 [ 30.653198] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fd03b6ec0 [ 30.654090] R13: 00007ffe74b02040 R14: 00007ffe74b02070 R15: 00007ffe74b023d0 [ 30.654988] [ 30.655297] [ 30.655523] Allocated by task 212: [ 30.655978] kasan_save_stack+0x22/0x50 [ 30.656512] kasan_set_track+0x25/0x30 [ 30.657050] __kasan_slab_alloc+0x59/0x70 [ 30.657614] kmem_cache_alloc+0x16b/0x370 [ 30.658169] vm_area_dup+0x20/0x160 [ 30.658662] __split_vma+0x170/0x950 [ 30.659163] split_vma+0xc6/0x110 [ 30.659633] mprotect_fixup+0x8d2/0xb30 [ 30.660176] do_mprotect_pkey+0x87e/0xd40 [ 30.660755] __x64_sys_mprotect+0x78/0xc0 [ 30.661317] do_syscall_64+0x3f/0x90 [ 30.661832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.662521] [ 30.662751] Freed by task 209: [ 30.663174] kasan_save_stack+0x22/0x50 [ 30.663711] kasan_set_track+0x25/0x30 [ 30.664239] kasan_save_free_info+0x2b/0x50 [ 30.664820] __kasan_slab_free+0x10a/0x190 [ 30.665384] kmem_cache_free+0x10d/0x4d0 [ 30.665928] rcu_core+0x8c8/0x2860 [ 30.666404] __do_softirq+0x1b7/0x7d4 [ 30.666914] [ 30.667148] Last potentially related work creation: [ 30.667766] kasan_save_stack+0x22/0x50 [ 30.668311] __kasan_record_aux_stack+0x8e/0xa0 [ 30.668938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.669619] remove_vma+0x139/0x170 [ 30.670105] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.670702] do_vmi_munmap+0x1f1/0x2b0 [ 30.671233] __vm_munmap+0x138/0x3a0 [ 30.671738] __x64_sys_munmap+0x59/0x80 [ 30.672275] do_syscall_64+0x3f/0x90 [ 30.672795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673485] [ 30.673715] The buggy address belongs to the object at ffff88800fc1f910 [ 30.673715] which belongs to the cache vm_area_struct of size 168 [ 30.675290] The buggy address is located 88 bytes inside of [ 30.675290] freed 168-byte region [ffff88800fc1f910, ffff88800fc1f9b8) [ 30.676792] [ 30.677022] The buggy address belongs to the physical page: [ 30.677726] page:000000005dfdc00f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc1f [ 30.678885] memcg:ffff88800dcfe401 [ 30.679344] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.680028] page_type: 0xffffffff() [ 30.680516] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.681509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcfe401 [ 30.682489] page dumped because: kasan: bad access detected [ 30.683201] [ 30.683437] Memory state around the buggy address: [ 30.684054] ffff88800fc1f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.684967] ffff88800fc1f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.685878] >ffff88800fc1f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.686779] ^ [ 30.687617] ffff88800fc1f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.688544] ffff88800fc1fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.689477] ================================================================== [ 30.690574] Disabling lock debugging due to kernel taint [ 33.067734] BUG: Bad rss-counter state mm:00000000ee791a90 type:MM_FILEPAGES val:33 [ 33.068942] BUG: Bad rss-counter state mm:00000000ee791a90 type:MM_ANONPAGES val:22 [ 33.471193] BUG: Bad rss-counter state mm:0000000041dd6351 type:MM_FILEPAGES val:33 [ 33.472125] BUG: Bad rss-counter state mm:0000000041dd6351 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8501' (ECDSA) to the list of known hosts. 2023/06/20 18:01:28 fuzzer started 2023/06/20 18:01:29 dialing manager at localhost:36067 2023/06/20 18:01:29 checking machine... 2023/06/20 18:01:29 checking revisions... [ 34.231833] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:01:29 testing simple program... [ 34.295223] cgroup: Unknown subsys name 'net' [ 34.349982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800c9a0980 RCX=ffff88800c9a0980 RDX=00000000000d000d RSI=ffff88800c9a0980 RDI=ffff88800844f780 RBP=ffff88801028fc68 RSP=ffff88801028fbd0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000326800 R11=00000000000d000c R12=ffffea0000326800 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 00007fd9368de900 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=00007fd935cf9870 CR3=000000000d1ea000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5eee2277c9e3cc7900000000000ae988 XMM05=d4e0145a0d3f38bd0000000000132490 XMM06=806171799158d9670000000000131280 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2f06 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff8880146251c0 RSI=ffffffff83ab18a9 RDI=ffffffff87f97830 RBP=0000000000000000 RSP=ffff88801835f508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000b6 R11=0000094100000941 R12=0000000000000000 R13=00000000000000b6 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18c4 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 00007f0e16765900 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=00007fffbc3f7000 CR3=000000000de66000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000