syzkaller login: [ 30.780306] BUG: Bad rss-counter state mm:0000000061ca52e5 type:MM_FILEPAGES val:33 [ 30.781531] BUG: Bad rss-counter state mm:0000000061ca52e5 type:MM_ANONPAGES val:22 [ 30.946210] ================================================================== [ 30.947146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.948122] Read of size 8 at addr ffff88801bc706b0 by task sshd/219 [ 30.949007] [ 30.949225] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.950101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.951108] Call Trace: [ 30.951431] [ 30.951727] dump_stack_lvl+0x91/0xf0 [ 30.952274] print_report+0xcc/0x620 [ 30.952763] ? __virt_addr_valid+0x102/0x340 [ 30.953314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.953935] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.954565] kasan_report+0xbe/0xf0 [ 30.955041] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.955685] vma_interval_tree_remove+0xc75/0xec0 [ 30.956328] vma_prepare+0xc54/0x11a0 [ 30.956815] __split_vma+0x5af/0x950 [ 30.957284] ? __pfx___split_vma+0x10/0x10 [ 30.957816] ? find_held_lock+0x2c/0x110 [ 30.958344] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.958909] ? lock_is_held_type+0x9f/0x120 [ 30.959446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.960078] ? mtree_range_walk+0x632/0x900 [ 30.960638] ? mas_walk+0x5c7/0x7c0 [ 30.961121] do_vmi_munmap+0x1f1/0x2b0 [ 30.961612] mmap_region+0x1f9/0x2660 [ 30.962104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.962617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.963336] ? __pfx_lock_acquire+0x10/0x10 [ 30.963927] ? __pfx_mmap_region+0x10/0x10 [ 30.964457] ? security_mmap_addr+0x7d/0xa0 [ 30.964994] ? get_unmapped_area+0x1f5/0x3f0 [ 30.965554] do_mmap+0x854/0xf00 [ 30.966004] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.966506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.967080] ksys_mmap_pgoff+0x3af/0x500 [ 30.967602] do_syscall_64+0x3f/0x90 [ 30.968090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.968748] RIP: 0033:0x7fce19997d82 [ 30.969220] 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 [ 30.971371] RSP: 002b:00007ffd17c78a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.972296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce19997d82 [ 30.973152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce18dd1000 [ 30.974008] RBP: 00007fce18dd1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.974859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055824a8fbec0 [ 30.975718] R13: 00007ffd17c78aa0 R14: 00007ffd17c78ad0 R15: 00007ffd17c78e30 [ 30.976608] [ 30.976906] [ 30.977126] Allocated by task 212: [ 30.977569] kasan_save_stack+0x22/0x50 [ 30.978078] kasan_set_track+0x25/0x30 [ 30.978578] __kasan_slab_alloc+0x59/0x70 [ 30.979118] kmem_cache_alloc+0x16b/0x370 [ 30.979645] vm_area_dup+0x20/0x160 [ 30.980118] __split_vma+0x170/0x950 [ 30.980590] split_vma+0xc6/0x110 [ 30.981040] mprotect_fixup+0x8d2/0xb30 [ 30.981546] do_mprotect_pkey+0x87e/0xd40 [ 30.982072] __x64_sys_mprotect+0x78/0xc0 [ 30.982596] do_syscall_64+0x3f/0x90 [ 30.983078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983738] [ 30.983974] Freed by task 212: [ 30.984371] kasan_save_stack+0x22/0x50 [ 30.984885] kasan_set_track+0x25/0x30 [ 30.985385] kasan_save_free_info+0x2b/0x50 [ 30.985932] __kasan_slab_free+0x10a/0x190 [ 30.986466] kmem_cache_free+0x10d/0x4d0 [ 30.986981] rcu_core+0x8c8/0x2860 [ 30.987437] __do_softirq+0x1b7/0x7d4 [ 30.987937] [ 30.988161] Last potentially related work creation: [ 30.988752] kasan_save_stack+0x22/0x50 [ 30.989266] __kasan_record_aux_stack+0x8e/0xa0 [ 30.989844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.990490] remove_vma+0x139/0x170 [ 30.990950] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.991509] do_vmi_munmap+0x1f1/0x2b0 [ 30.992024] __vm_munmap+0x138/0x3a0 [ 30.992497] __x64_sys_munmap+0x59/0x80 [ 30.993007] do_syscall_64+0x3f/0x90 [ 30.993491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994138] [ 30.994356] The buggy address belongs to the object at ffff88801bc70658 [ 30.994356] which belongs to the cache vm_area_struct of size 168 [ 30.995833] The buggy address is located 88 bytes inside of [ 30.995833] freed 168-byte region [ffff88801bc70658, ffff88801bc70700) [ 30.997249] [ 30.997470] The buggy address belongs to the physical page: [ 30.998138] page:00000000db9caf26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc70 [ 30.999240] memcg:ffff88800fdfc301 [ 30.999672] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.000346] page_type: 0xffffffff() [ 31.000797] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.001748] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdfc301 [ 31.002678] page dumped because: kasan: bad access detected [ 31.003348] [ 31.003566] Memory state around the buggy address: [ 31.004166] ffff88801bc70580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.005033] ffff88801bc70600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.005896] >ffff88801bc70680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.006760] ^ [ 31.007354] ffff88801bc70700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.008222] ffff88801bc70780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.009073] ================================================================== [ 31.010035] Disabling lock debugging due to kernel taint [ 32.707113] BUG: Bad rss-counter state mm:0000000078572a45 type:MM_FILEPAGES val:33 [ 32.708299] BUG: Bad rss-counter state mm:0000000078572a45 type:MM_ANONPAGES val:22 [ 33.126548] BUG: Bad rss-counter state mm:0000000008187c5e type:MM_FILEPAGES val:33 [ 33.127629] BUG: Bad rss-counter state mm:0000000008187c5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65234' (ECDSA) to the list of known hosts. 2023/06/20 15:47:34 fuzzer started 2023/06/20 15:47:34 dialing manager at localhost:36067 2023/06/20 15:47:34 checking machine... 2023/06/20 15:47:34 checking revisions... [ 33.844490] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:47:34 testing simple program... [ 33.891724] cgroup: Unknown subsys name 'net' [ 33.933016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:47:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88807ffdc000 RSI=ffffffff817f6cc3 RDI=ffff88807ffdd410 RBP=ffff88801024f950 RSP=ffff88801024f890 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=ffff88800844f780 R14=ffff88807ffdd410 R15=ffff88800844e900 RIP=ffffffff818079dd RFL=00000286 [--S--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 00007fedf4558900 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=00007fedf3968870 CR3=000000000c702000 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=fb2d9e3a81ca469700000000000ae988 XMM05=f6896c6c9d8fc00e0000000000132bf8 XMM06=dfcdbad4f1609c370000000000131ab0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800c62fe10 RCX=0000000000000001 RDX=1ffff110018c5e94 RSI=ffff88800c62fde0 RDI=ffff88800c62f4a0 RBP=ffff88800c628000 RSP=ffff88800c62f420 R8 =0000000000000001 R9 =ffff88800c62f4d0 R10=0000000000038001 R11=000000000008ab47 R12=ffff88800c62f4f0 R13=ffff88800c62f4d8 R14=ffff88800c62fde0 R15=ffff88800c62f490 RIP=ffffffff81131ca6 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 00007fa8f70fe900 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=00007ffc34fe6000 CR3=000000000e98a000 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