syzkaller login: [ 69.589113] BUG: Bad rss-counter state mm:00000000c56c421c type:MM_FILEPAGES val:33 [ 69.590314] BUG: Bad rss-counter state mm:00000000c56c421c type:MM_ANONPAGES val:22 [ 69.632881] ================================================================== [ 69.633750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.634647] Read of size 8 at addr ffff88800d7e2140 by task sshd/221 [ 69.635380] [ 69.635700] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.636671] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.637651] Call Trace: [ 69.637942] <TASK> [ 69.638199] dump_stack_lvl+0x91/0xf0 [ 69.638637] print_report+0xcc/0x620 [ 69.639070] ? __virt_addr_valid+0x102/0x340 [ 69.639566] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.640110] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.640660] kasan_report+0xbe/0xf0 [ 69.641096] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.641653] vma_interval_tree_remove+0xc75/0xec0 [ 69.642191] vma_prepare+0xc54/0x11a0 [ 69.642622] __split_vma+0x5af/0x950 [ 69.643042] ? __pfx___split_vma+0x10/0x10 [ 69.643535] ? find_held_lock+0x2c/0x110 [ 69.644013] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.644516] ? lock_is_held_type+0x9f/0x120 [ 69.644999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.645587] ? mtree_range_walk+0x632/0x900 [ 69.646106] ? mas_walk+0x5c7/0x7c0 [ 69.646539] do_vmi_munmap+0x1f1/0x2b0 [ 69.646973] mmap_region+0x1f9/0x2660 [ 69.647401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.647867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.648515] ? __pfx_lock_acquire+0x10/0x10 [ 69.648987] ? __pfx_mmap_region+0x10/0x10 [ 69.649415] ? security_mmap_addr+0x7d/0xa0 [ 69.649803] ? get_unmapped_area+0x1f5/0x3f0 [ 69.650204] do_mmap+0x854/0xf00 [ 69.650520] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.650879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.651288] ksys_mmap_pgoff+0x3af/0x500 [ 69.651660] do_syscall_64+0x3f/0x90 [ 69.652012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.652488] RIP: 0033:0x7f95152ecd82 [ 69.652819] 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 [ 69.654383] RSP: 002b:00007ffe48f62778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.655041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95152ecd82 [ 69.655659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9514726000 [ 69.656280] RBP: 00007f9514726000 R08: 0000000000000009 R09: 0000000000001000 [ 69.656897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aca94cec0 [ 69.657517] R13: 00007ffe48f62790 R14: 00007ffe48f627c0 R15: 00007ffe48f62b20 [ 69.658146] </TASK> [ 69.658358] [ 69.658514] Allocated by task 214: [ 69.658828] kasan_save_stack+0x22/0x50 [ 69.659196] kasan_set_track+0x25/0x30 [ 69.659554] __kasan_slab_alloc+0x59/0x70 [ 69.659934] kmem_cache_alloc+0x16b/0x370 [ 69.660308] vm_area_dup+0x20/0x160 [ 69.660639] __split_vma+0x170/0x950 [ 69.660974] split_vma+0xc6/0x110 [ 69.661297] mprotect_fixup+0x8d2/0xb30 [ 69.661666] do_mprotect_pkey+0x87e/0xd40 [ 69.662046] __x64_sys_mprotect+0x78/0xc0 [ 69.662422] do_syscall_64+0x3f/0x90 [ 69.662767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.663229] [ 69.663389] Freed by task 203: [ 69.663685] kasan_save_stack+0x22/0x50 [ 69.664061] kasan_set_track+0x25/0x30 [ 69.664433] kasan_save_free_info+0x2b/0x50 [ 69.664833] __kasan_slab_free+0x10a/0x190 [ 69.665231] kmem_cache_free+0x10d/0x4d0 [ 69.665598] rcu_core+0x8c8/0x2860 [ 69.665921] __do_softirq+0x1b7/0x7d4 [ 69.666282] [ 69.666445] Last potentially related work creation: [ 69.666884] kasan_save_stack+0x22/0x50 [ 69.667259] __kasan_record_aux_stack+0x8e/0xa0 [ 69.667677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.668156] remove_vma+0x139/0x170 [ 69.668496] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.668913] do_vmi_munmap+0x1f1/0x2b0 [ 69.669281] __vm_munmap+0x138/0x3a0 [ 69.669629] __x64_sys_munmap+0x59/0x80 [ 69.669983] do_syscall_64+0x3f/0x90 [ 69.670327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.670795] [ 69.670954] The buggy address belongs to the object at ffff88800d7e20e8 [ 69.670954] which belongs to the cache vm_area_struct of size 168 [ 69.672026] The buggy address is located 88 bytes inside of [ 69.672026] freed 168-byte region [ffff88800d7e20e8, ffff88800d7e2190) [ 69.673070] [ 69.673229] The buggy address belongs to the physical page: [ 69.673733] page:000000005076202c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7e2 [ 69.674528] memcg:ffff88800d1a6101 [ 69.674839] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.675312] page_type: 0xffffffff() [ 69.675636] raw: 0100000000000200 ffff88800879fc80 ffffea000035b8c0 dead000000000004 [ 69.676340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1a6101 [ 69.677010] page dumped because: kasan: bad access detected [ 69.677588] [ 69.677745] Memory state around the buggy address: [ 69.678170] ffff88800d7e2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.678800] ffff88800d7e2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 69.679448] >ffff88800d7e2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.680063] ^ [ 69.680523] ffff88800d7e2180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 69.681155] ffff88800d7e2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 69.681783] ================================================================== [ 69.682507] Disabling lock debugging due to kernel taint [ 71.773960] BUG: Bad rss-counter state mm:00000000517ce73d type:MM_FILEPAGES val:33 [ 71.775119] BUG: Bad rss-counter state mm:00000000517ce73d type:MM_ANONPAGES val:22 [ 72.164575] BUG: Bad rss-counter state mm:00000000a39444bd type:MM_FILEPAGES val:33 [ 72.165620] BUG: Bad rss-counter state mm:00000000a39444bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49093' (ECDSA) to the list of known hosts. 2023/06/20 09:41:18 fuzzer started 2023/06/20 09:41:19 dialing manager at localhost:44161 2023/06/20 09:41:19 checking machine... 2023/06/20 09:41:19 checking revisions... [ 72.914647] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:41:19 testing simple program... [ 72.958268] cgroup: Unknown subsys name 'net' [ 72.998910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e58 RDI=ffffffff813782a8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800da681b0 RIP=ffffffff811303b2 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 0000000000000000 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=00007ff349a08d10 CR3=0000000015d12000 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=2038313a31343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85e00f6c RCX=ffffffff81847451 RDX=0000000000000000 RSI=ffffffff8613dd30 RDI=ffffffff85e00f6c RBP=ffffffff85e00f6c RSP=ffff8880199570a0 R8 =ffffffff8613dd30 R9 =ffff888019957198 R10=0000000000038001 R11=0000000000021ee6 R12=ffffffff85e00f6c R13=ffffffff85e00f6c R14=ffffffff85e00f6c R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007fcedb0a4900 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=0000561a9e462380 CR3=000000000b37a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000