syzkaller login: [ 29.914222] BUG: Bad rss-counter state mm:000000004fbbe135 type:MM_FILEPAGES val:33 [ 29.915432] BUG: Bad rss-counter state mm:000000004fbbe135 type:MM_ANONPAGES val:22 [ 29.956971] ================================================================== [ 29.957657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.958373] Read of size 8 at addr ffff88801a10c5c8 by task sshd/220 [ 29.958959] [ 29.959127] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.959782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.960540] Call Trace: [ 29.960785] [ 29.961002] dump_stack_lvl+0x91/0xf0 [ 29.961479] print_report+0xcc/0x620 [ 29.961862] ? __virt_addr_valid+0x102/0x340 [ 29.962284] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.962756] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.963224] kasan_report+0xbe/0xf0 [ 29.963587] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.964078] vma_interval_tree_remove+0xc75/0xec0 [ 29.964545] vma_prepare+0xc54/0x11a0 [ 29.964806] __split_vma+0x5af/0x950 [ 29.965064] ? __pfx___split_vma+0x10/0x10 [ 29.965353] ? find_held_lock+0x2c/0x110 [ 29.965643] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.965965] ? lock_is_held_type+0x9f/0x120 [ 29.966267] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.966615] ? mtree_range_walk+0x632/0x900 [ 29.966924] ? mas_walk+0x5c7/0x7c0 [ 29.967187] do_vmi_munmap+0x1f1/0x2b0 [ 29.967463] mmap_region+0x1f9/0x2660 [ 29.967741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.968040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.968453] ? __pfx_lock_acquire+0x10/0x10 [ 29.968758] ? __pfx_mmap_region+0x10/0x10 [ 29.969064] ? security_mmap_addr+0x7d/0xa0 [ 29.969376] ? get_unmapped_area+0x1f5/0x3f0 [ 29.969681] do_mmap+0x854/0xf00 [ 29.969930] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.970207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.970525] ksys_mmap_pgoff+0x3af/0x500 [ 29.970816] do_syscall_64+0x3f/0x90 [ 29.971095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.971460] RIP: 0033:0x7fd51723cd82 [ 29.971715] 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 [ 29.972916] RSP: 002b:00007ffed4ab4f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.973437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd51723cd82 [ 29.973918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd516676000 [ 29.974398] RBP: 00007fd516676000 R08: 0000000000000009 R09: 0000000000001000 [ 29.974888] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62cb6fb20 [ 29.975366] R13: 00007ffed4ab4f70 R14: 00007ffed4ab4fa0 R15: 00007ffed4ab5300 [ 29.975866] [ 29.976031] [ 29.976149] Allocated by task 212: [ 29.976405] kasan_save_stack+0x22/0x50 [ 29.976689] kasan_set_track+0x25/0x30 [ 29.976967] __kasan_slab_alloc+0x59/0x70 [ 29.977260] kmem_cache_alloc+0x16b/0x370 [ 29.977555] vm_area_dup+0x20/0x160 [ 29.977822] __split_vma+0x170/0x950 [ 29.978089] split_vma+0xc6/0x110 [ 29.978339] mprotect_fixup+0x8d2/0xb30 [ 29.978623] do_mprotect_pkey+0x87e/0xd40 [ 29.978919] __x64_sys_mprotect+0x78/0xc0 [ 29.979214] do_syscall_64+0x3f/0x90 [ 29.979478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.979838] [ 29.979962] Freed by task 212: [ 29.980187] kasan_save_stack+0x22/0x50 [ 29.980473] kasan_set_track+0x25/0x30 [ 29.980757] kasan_save_free_info+0x2b/0x50 [ 29.981058] __kasan_slab_free+0x10a/0x190 [ 29.981359] kmem_cache_free+0x10d/0x4d0 [ 29.981650] rcu_core+0x8c8/0x2860 [ 29.981901] __do_softirq+0x1b7/0x7d4 [ 29.982171] [ 29.982289] Last potentially related work creation: [ 29.982627] kasan_save_stack+0x22/0x50 [ 29.982912] __kasan_record_aux_stack+0x8e/0xa0 [ 29.983237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.983611] remove_vma+0x139/0x170 [ 29.983872] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.984190] do_vmi_munmap+0x1f1/0x2b0 [ 29.984469] __vm_munmap+0x138/0x3a0 [ 29.984731] __x64_sys_munmap+0x59/0x80 [ 29.985013] do_syscall_64+0x3f/0x90 [ 29.985285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.985659] [ 29.985783] The buggy address belongs to the object at ffff88801a10c570 [ 29.985783] which belongs to the cache vm_area_struct of size 168 [ 29.986621] The buggy address is located 88 bytes inside of [ 29.986621] freed 168-byte region [ffff88801a10c570, ffff88801a10c618) [ 29.987429] [ 29.987549] The buggy address belongs to the physical page: [ 29.987933] page:00000000d085a1bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a10c [ 29.988568] memcg:ffff88800e872501 [ 29.988808] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.989182] page_type: 0xffffffff() [ 29.989438] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.989965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e872501 [ 29.990482] page dumped because: kasan: bad access detected [ 29.990864] [ 29.990984] Memory state around the buggy address: [ 29.991313] ffff88801a10c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.991791] ffff88801a10c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.992283] >ffff88801a10c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.992774] ^ [ 29.993150] ffff88801a10c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.993637] ffff88801a10c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.994133] ================================================================== [ 29.994642] Disabling lock debugging due to kernel taint [ 31.836446] BUG: Bad rss-counter state mm:00000000527f9c91 type:MM_FILEPAGES val:33 [ 31.837693] BUG: Bad rss-counter state mm:00000000527f9c91 type:MM_ANONPAGES val:22 [ 32.270622] BUG: Bad rss-counter state mm:0000000029f03eb8 type:MM_FILEPAGES val:33 [ 32.271645] BUG: Bad rss-counter state mm:0000000029f03eb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55127' (ECDSA) to the list of known hosts. 2023/06/19 13:05:04 fuzzer started 2023/06/19 13:05:04 dialing manager at localhost:44161 2023/06/19 13:05:04 checking machine... 2023/06/19 13:05:04 checking revisions... [ 33.009408] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:05:04 testing simple program... [ 33.068677] cgroup: Unknown subsys name 'net' [ 33.125319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:05:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003186f47 RSI=ffffffff8186bab8 RDI=ffff888018c37aa8 RBP=ffff888018c37a78 RSP=ffff888018c379d8 R8 =0000000000000001 R9 =ffff888018c37a20 R10=0000000000038001 R11=0000000000038dc4 R12=ffff888018c37aa8 R13=0000000000000000 R14=ffff888019fe51c0 R15=ffff88800df79ab0 RIP=ffffffff813ad42e 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 00007f9d833a7900 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=00007f9d8395f0b0 CR3=000000000f1f4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8185ae43 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028b9f46 RSI=ffffffff8185ae43 RDI=ffff8880145cfaa0 RBP=ffff8880145cfa70 RSP=ffff8880145cf9d0 R8 =0000000000000001 R9 =ffff8880145cfa18 R10=0000000000038001 R11=00000000000223e2 R12=ffff8880145cfaa0 R13=0000000000000000 R14=ffff88800fde0000 R15=dffffc0000000000 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007fe4f6f11900 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=00007fe4f63517a0 CR3=000000000c668000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1ce26d866570eed500000000000ae988 XMM05=131f502862b4eae70000000000134bf8 XMM06=4fda316b135da52b00000000001339e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000