syzkaller login: [ 41.386688] BUG: Bad rss-counter state mm:0000000004822535 type:MM_FILEPAGES val:33 [ 41.388072] BUG: Bad rss-counter state mm:0000000004822535 type:MM_ANONPAGES val:22 [ 41.536731] ================================================================== [ 41.537713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.538800] Read of size 8 at addr ffff88800eb23df0 by task sshd/222 [ 41.539632] [ 41.539866] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.540792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.541780] Call Trace: [ 41.542102] [ 41.542388] dump_stack_lvl+0x91/0xf0 [ 41.542881] print_report+0xcc/0x620 [ 41.543361] ? __virt_addr_valid+0x102/0x340 [ 41.543904] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.544529] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.545134] kasan_report+0xbe/0xf0 [ 41.545608] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.546216] vma_interval_tree_remove+0xc75/0xec0 [ 41.546842] vma_prepare+0xc54/0x11a0 [ 41.547316] __split_vma+0x5af/0x950 [ 41.547800] ? __pfx___split_vma+0x10/0x10 [ 41.548319] ? find_held_lock+0x2c/0x110 [ 41.548834] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.549391] ? lock_is_held_type+0x9f/0x120 [ 41.549926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.550525] ? mtree_range_walk+0x632/0x900 [ 41.551092] ? mas_walk+0x5c7/0x7c0 [ 41.551563] do_vmi_munmap+0x1f1/0x2b0 [ 41.552055] mmap_region+0x1f9/0x2660 [ 41.552553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.553077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.553800] ? __pfx_lock_acquire+0x10/0x10 [ 41.554331] ? __pfx_mmap_region+0x10/0x10 [ 41.554891] ? security_mmap_addr+0x7d/0xa0 [ 41.555430] ? get_unmapped_area+0x1f5/0x3f0 [ 41.555983] do_mmap+0x854/0xf00 [ 41.556432] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.556943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.557520] ksys_mmap_pgoff+0x3af/0x500 [ 41.558031] do_syscall_64+0x3f/0x90 [ 41.558511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.559189] RIP: 0033:0x7ffb5535cd82 [ 41.559653] 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 [ 41.561821] RSP: 002b:00007ffc5a8110b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.562741] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb5535cd82 [ 41.563611] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb54796000 [ 41.564463] RBP: 00007ffb54796000 R08: 0000000000000009 R09: 0000000000001000 [ 41.565321] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9a127bec0 [ 41.566177] R13: 00007ffc5a8110d0 R14: 00007ffc5a811100 R15: 00007ffc5a811460 [ 41.567063] [ 41.567361] [ 41.567589] Allocated by task 215: [ 41.568019] kasan_save_stack+0x22/0x50 [ 41.568529] kasan_set_track+0x25/0x30 [ 41.569033] __kasan_slab_alloc+0x59/0x70 [ 41.569563] kmem_cache_alloc+0x16b/0x370 [ 41.570086] vm_area_dup+0x20/0x160 [ 41.570555] __split_vma+0x170/0x950 [ 41.571041] split_vma+0xc6/0x110 [ 41.571488] mprotect_fixup+0x8d2/0xb30 [ 41.571991] do_mprotect_pkey+0x87e/0xd40 [ 41.572519] __x64_sys_mprotect+0x78/0xc0 [ 41.573050] do_syscall_64+0x3f/0x90 [ 41.573532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.574186] [ 41.574400] Freed by task 215: [ 41.574817] kasan_save_stack+0x22/0x50 [ 41.575318] kasan_set_track+0x25/0x30 [ 41.575818] kasan_save_free_info+0x2b/0x50 [ 41.576359] __kasan_slab_free+0x10a/0x190 [ 41.576902] kmem_cache_free+0x10d/0x4d0 [ 41.577419] rcu_core+0x8c8/0x2860 [ 41.577878] __do_softirq+0x1b7/0x7d4 [ 41.578377] [ 41.578597] Last potentially related work creation: [ 41.579204] kasan_save_stack+0x22/0x50 [ 41.579712] __kasan_record_aux_stack+0x8e/0xa0 [ 41.580306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.580957] remove_vma+0x139/0x170 [ 41.581417] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.582005] do_vmi_munmap+0x1f1/0x2b0 [ 41.582494] __vm_munmap+0x138/0x3a0 [ 41.582987] __x64_sys_munmap+0x59/0x80 [ 41.583491] do_syscall_64+0x3f/0x90 [ 41.583980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.584637] [ 41.584860] The buggy address belongs to the object at ffff88800eb23d98 [ 41.584860] which belongs to the cache vm_area_struct of size 168 [ 41.586346] The buggy address is located 88 bytes inside of [ 41.586346] freed 168-byte region [ffff88800eb23d98, ffff88800eb23e40) [ 41.587772] [ 41.587994] The buggy address belongs to the physical page: [ 41.588649] page:0000000018b93561 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb23 [ 41.589745] memcg:ffff88800eb21501 [ 41.590182] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.590851] page_type: 0xffffffff() [ 41.591312] raw: 0100000000000200 ffff88800879fc80 ffffea000036d480 dead000000000008 [ 41.592252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb21501 [ 41.593167] page dumped because: kasan: bad access detected [ 41.593834] [ 41.594061] Memory state around the buggy address: [ 41.594646] ffff88800eb23c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.595528] ffff88800eb23d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.596387] >ffff88800eb23d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.597250] ^ [ 41.598061] ffff88800eb23e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.598924] ffff88800eb23e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.599795] ================================================================== [ 41.600792] Disabling lock debugging due to kernel taint [ 43.653623] BUG: Bad rss-counter state mm:000000001af49dc7 type:MM_FILEPAGES val:33 [ 43.654899] BUG: Bad rss-counter state mm:000000001af49dc7 type:MM_ANONPAGES val:22 [ 44.081072] BUG: Bad rss-counter state mm:000000004f8852e2 type:MM_FILEPAGES val:33 [ 44.082254] BUG: Bad rss-counter state mm:000000004f8852e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8796' (ECDSA) to the list of known hosts. 2023/06/19 15:29:35 fuzzer started 2023/06/19 15:29:36 dialing manager at localhost:44161 2023/06/19 15:29:36 checking machine... 2023/06/19 15:29:36 checking revisions... [ 44.635469] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:29:36 testing simple program... [ 44.679560] cgroup: Unknown subsys name 'net' [ 44.714216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:24 Registers: info registers vcpu 0 RAX=00007ffed45dbc60 RBX=00000000000000e1 RCX=00007ffed45dc000 RDX=00007ffed45ddf00 RSI=0000000000000000 RDI=00007ffed45dbc60 RBP=00000000000000f4 RSP=fffffe0000002fd0 R8 =00007ffed45e0304 R9 =00007ffed45e01c0 R10=00007f139702ba57 R11=0000000000000000 R12=0000000000000008 R13=00007ffed45dbc60 R14=00007ffed45e0430 R15=0000000000000452 RIP=ffffffff84601260 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f13964db900 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=00007ffed45dc000 CR3=000000000987e000 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=00000000000000000000000000000000 XMM02=66138db7bc980dc1efe0d23a55f2960e XMM03=7cca24e53d423762c54b5e273d9fe970 XMM04=0eb0c052aebec17ff0484b646b404f18 XMM05=00000000000000000000000000000000 XMM06=0eb024523d423762c5484b273d404f18 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007ff1127002c0 CR3=000000000daa0000 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=61eedfebf29ea7a55543a310fb71091f XMM02=000000000011d1c8ec2efd57dc4c00df XMM03=000000000012470888924b3f3c6b94a9 XMM04=894cd017e8f84b4c00000000000ae988 XMM05=59d5b690e0af863b00000000001342b0 XMM06=b76af163804c5d7b0000000000133118 XMM07=e042d86d42eb936e0000000000124988 XMM08=88924b3f3c6b94a9000000000011d228 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000