syzkaller login: [ 40.849676] BUG: Bad rss-counter state mm:00000000652ca0b0 type:MM_FILEPAGES val:33 [ 40.851056] BUG: Bad rss-counter state mm:00000000652ca0b0 type:MM_ANONPAGES val:22 [ 40.993618] ================================================================== [ 40.994528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.995463] Read of size 8 at addr ffff8880097a63f8 by task sshd/220 [ 40.996249] [ 40.996468] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.997482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.998446] Call Trace: [ 40.998767] [ 40.999051] dump_stack_lvl+0x91/0xf0 [ 40.999559] print_report+0xcc/0x620 [ 41.000084] ? __virt_addr_valid+0x102/0x340 [ 41.000631] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.001245] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.001876] kasan_report+0xbe/0xf0 [ 41.002344] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.002970] vma_interval_tree_remove+0xc75/0xec0 [ 41.003569] vma_prepare+0xc54/0x11a0 [ 41.004082] __split_vma+0x5af/0x950 [ 41.004551] ? __pfx___split_vma+0x10/0x10 [ 41.005069] ? find_held_lock+0x2c/0x110 [ 41.005583] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.006139] ? lock_is_held_type+0x9f/0x120 [ 41.006669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.007272] ? mtree_range_walk+0x632/0x900 [ 41.007840] ? mas_walk+0x5c7/0x7c0 [ 41.008315] do_vmi_munmap+0x1f1/0x2b0 [ 41.008800] mmap_region+0x1f9/0x2660 [ 41.009274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.009790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.010503] ? __pfx_lock_acquire+0x10/0x10 [ 41.011029] ? __pfx_mmap_region+0x10/0x10 [ 41.011550] ? security_mmap_addr+0x7d/0xa0 [ 41.012115] ? get_unmapped_area+0x1f5/0x3f0 [ 41.012662] do_mmap+0x854/0xf00 [ 41.013099] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.013592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.014149] ksys_mmap_pgoff+0x3af/0x500 [ 41.014655] do_syscall_64+0x3f/0x90 [ 41.015127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.015776] RIP: 0033:0x7f7a92c18d82 [ 41.016240] 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 [ 41.018354] RSP: 002b:00007ffe778b0f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.019254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a92c18d82 [ 41.020129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a92052000 [ 41.020977] RBP: 00007f7a92052000 R08: 0000000000000009 R09: 0000000000001000 [ 41.021815] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe34f87ec0 [ 41.022661] R13: 00007ffe778b0f30 R14: 00007ffe778b0f60 R15: 00007ffe778b12c0 [ 41.023513] [ 41.023808] [ 41.024028] Allocated by task 213: [ 41.024458] kasan_save_stack+0x22/0x50 [ 41.024959] kasan_set_track+0x25/0x30 [ 41.025451] __kasan_slab_alloc+0x59/0x70 [ 41.025969] kmem_cache_alloc+0x16b/0x370 [ 41.026487] vm_area_dup+0x20/0x160 [ 41.026940] __split_vma+0x170/0x950 [ 41.027405] split_vma+0xc6/0x110 [ 41.027850] mprotect_fixup+0x8d2/0xb30 [ 41.028355] do_mprotect_pkey+0x87e/0xd40 [ 41.028881] __x64_sys_mprotect+0x78/0xc0 [ 41.029407] do_syscall_64+0x3f/0x90 [ 41.029877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.030515] [ 41.030732] Freed by task 213: [ 41.031122] kasan_save_stack+0x22/0x50 [ 41.031627] kasan_set_track+0x25/0x30 [ 41.032131] kasan_save_free_info+0x2b/0x50 [ 41.032661] __kasan_slab_free+0x10a/0x190 [ 41.033186] kmem_cache_free+0x10d/0x4d0 [ 41.033692] rcu_core+0x8c8/0x2860 [ 41.034135] __do_softirq+0x1b7/0x7d4 [ 41.034610] [ 41.034825] Last potentially related work creation: [ 41.035406] kasan_save_stack+0x22/0x50 [ 41.035924] __kasan_record_aux_stack+0x8e/0xa0 [ 41.036498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.037138] remove_vma+0x139/0x170 [ 41.037593] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.038150] do_vmi_munmap+0x1f1/0x2b0 [ 41.038641] __vm_munmap+0x138/0x3a0 [ 41.039104] __x64_sys_munmap+0x59/0x80 [ 41.039604] do_syscall_64+0x3f/0x90 [ 41.040113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.040748] [ 41.040962] The buggy address belongs to the object at ffff8880097a63a0 [ 41.040962] which belongs to the cache vm_area_struct of size 168 [ 41.042428] The buggy address is located 88 bytes inside of [ 41.042428] freed 168-byte region [ffff8880097a63a0, ffff8880097a6448) [ 41.043855] [ 41.044073] The buggy address belongs to the physical page: [ 41.044729] page:00000000bf538d8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97a6 [ 41.045815] memcg:ffff888018224601 [ 41.046243] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.046890] page_type: 0xffffffff() [ 41.047343] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.048283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018224601 [ 41.049177] page dumped because: kasan: bad access detected [ 41.049832] [ 41.050079] Memory state around the buggy address: [ 41.050663] ffff8880097a6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.051519] ffff8880097a6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.052398] >ffff8880097a6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.053244] ^ [ 41.054088] ffff8880097a6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.054936] ffff8880097a6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.055811] ================================================================== [ 41.057002] Disabling lock debugging due to kernel taint [ 43.931599] BUG: Bad rss-counter state mm:00000000b8b453ad type:MM_FILEPAGES val:33 [ 43.933187] BUG: Bad rss-counter state mm:00000000b8b453ad type:MM_ANONPAGES val:22 [ 44.516004] BUG: Bad rss-counter state mm:000000003c39c33d type:MM_FILEPAGES val:33 [ 44.517236] BUG: Bad rss-counter state mm:000000003c39c33d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5553' (ECDSA) to the list of known hosts. 2023/06/19 18:18:40 fuzzer started 2023/06/19 18:18:41 dialing manager at localhost:44161 2023/06/19 18:18:41 checking machine... 2023/06/19 18:18:41 checking revisions... [ 45.137693] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:18:41 testing simple program... [ 45.177620] cgroup: Unknown subsys name 'net' [ 45.218711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:30 Registers: info registers vcpu 0 RAX=ffffffff818d9de2 RBX=ffffffff85e0a710 RCX=ffffffff818d9dc5 RDX=0000000000000000 RSI=ffffffff8614c05e RDI=ffffffff85e0a6e0 RBP=ffffffff85e0a704 RSP=ffff88806ce09998 R8 =ffffffff8614c05e R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000244c3 R12=ffffffff85e0a70c R13=ffffffff85e0a6e0 R14=ffffffff85e0a700 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---C] 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 00007f38bb77c900 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=00007f38bbd33618 CR3=000000000c4aa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f14f909c038 CR3=000000000cb72000 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=dad73324d87ec68d3a401e9f49e5d1b7 XMM02=2c67c8bc2e329bc3000000000011d0c0 XMM03=fb795ef6d65770560000000000124638 XMM04=a00df016545f09fb00000000000ae988 XMM05=19e9129bd510f23500000000001341e8 XMM06=53826eb22c3752000000000000133050 XMM07=e042d86d42eb936e00000000001248b8 XMM08=cc7c0519c5c20f8e000000000011d120 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000