syzkaller login: [ 43.845385] BUG: Bad rss-counter state mm:0000000036a1e8d8 type:MM_FILEPAGES val:33 [ 43.846615] BUG: Bad rss-counter state mm:0000000036a1e8d8 type:MM_ANONPAGES val:22 [ 43.882455] ================================================================== [ 43.883486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.884436] Read of size 8 at addr ffff888016daa228 by task sshd/220 [ 43.885224] [ 43.885443] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.886317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.887318] Call Trace: [ 43.887647] [ 43.887935] dump_stack_lvl+0x91/0xf0 [ 43.888429] print_report+0xcc/0x620 [ 43.888926] ? __virt_addr_valid+0x102/0x340 [ 43.889497] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.890123] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.890752] kasan_report+0xbe/0xf0 [ 43.891283] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.891937] vma_interval_tree_remove+0xc75/0xec0 [ 43.892612] vma_prepare+0xc54/0x11a0 [ 43.893101] __split_vma+0x5af/0x950 [ 43.893583] ? __pfx___split_vma+0x10/0x10 [ 43.894116] ? find_held_lock+0x2c/0x110 [ 43.894635] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.895209] ? lock_is_held_type+0x9f/0x120 [ 43.895754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.896369] ? mtree_range_walk+0x632/0x900 [ 43.896953] ? mas_walk+0x5c7/0x7c0 [ 43.897453] do_vmi_munmap+0x1f1/0x2b0 [ 43.897959] mmap_region+0x1f9/0x2660 [ 43.898444] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.898959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.899683] ? __pfx_lock_acquire+0x10/0x10 [ 43.900223] ? __pfx_mmap_region+0x10/0x10 [ 43.900767] ? security_mmap_addr+0x7d/0xa0 [ 43.901304] ? get_unmapped_area+0x1f5/0x3f0 [ 43.901865] do_mmap+0x854/0xf00 [ 43.902303] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.902804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.903383] ksys_mmap_pgoff+0x3af/0x500 [ 43.903893] do_syscall_64+0x3f/0x90 [ 43.904374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.905040] RIP: 0033:0x7f31edd08d82 [ 43.905496] 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 [ 43.907660] RSP: 002b:00007fff0ce53a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.908635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31edd08d82 [ 43.909491] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31ed142000 [ 43.910500] RBP: 00007f31ed142000 R08: 0000000000000009 R09: 0000000000001000 [ 43.911348] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580d6160ec0 [ 43.912193] R13: 00007fff0ce53aa0 R14: 00007fff0ce53ad0 R15: 00007fff0ce53e30 [ 43.913082] [ 43.913375] [ 43.913594] Allocated by task 213: [ 43.914025] kasan_save_stack+0x22/0x50 [ 43.914533] kasan_set_track+0x25/0x30 [ 43.915055] __kasan_slab_alloc+0x59/0x70 [ 43.915593] kmem_cache_alloc+0x16b/0x370 [ 43.916146] vm_area_dup+0x20/0x160 [ 43.916626] __split_vma+0x170/0x950 [ 43.917105] split_vma+0xc6/0x110 [ 43.917544] mprotect_fixup+0x8d2/0xb30 [ 43.918069] do_mprotect_pkey+0x87e/0xd40 [ 43.918591] __x64_sys_mprotect+0x78/0xc0 [ 43.919131] do_syscall_64+0x3f/0x90 [ 43.919624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.920316] [ 43.920546] Freed by task 213: [ 43.920955] kasan_save_stack+0x22/0x50 [ 43.921502] kasan_set_track+0x25/0x30 [ 43.921998] kasan_save_free_info+0x2b/0x50 [ 43.922527] __kasan_slab_free+0x10a/0x190 [ 43.923062] kmem_cache_free+0x10d/0x4d0 [ 43.923577] rcu_core+0x8c8/0x2860 [ 43.924024] __do_softirq+0x1b7/0x7d4 [ 43.924506] [ 43.924723] Last potentially related work creation: [ 43.925314] kasan_save_stack+0x22/0x50 [ 43.925817] __kasan_record_aux_stack+0x8e/0xa0 [ 43.926434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.927117] remove_vma+0x139/0x170 [ 43.927583] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.928144] do_vmi_munmap+0x1f1/0x2b0 [ 43.928639] __vm_munmap+0x138/0x3a0 [ 43.929107] __x64_sys_munmap+0x59/0x80 [ 43.929606] do_syscall_64+0x3f/0x90 [ 43.930078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.930717] [ 43.930931] The buggy address belongs to the object at ffff888016daa1d0 [ 43.930931] which belongs to the cache vm_area_struct of size 168 [ 43.932410] The buggy address is located 88 bytes inside of [ 43.932410] freed 168-byte region [ffff888016daa1d0, ffff888016daa278) [ 43.933833] [ 43.934079] The buggy address belongs to the physical page: [ 43.934751] page:00000000d8eb5513 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16daa [ 43.935886] memcg:ffff88800d883c01 [ 43.936313] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.936964] page_type: 0xffffffff() [ 43.937418] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.938384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d883c01 [ 43.939343] page dumped because: kasan: bad access detected [ 43.940002] [ 43.940218] Memory state around the buggy address: [ 43.940808] ffff888016daa100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.941667] ffff888016daa180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.942559] >ffff888016daa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.943447] ^ [ 43.944010] ffff888016daa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.944894] ffff888016daa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.945755] ================================================================== [ 43.947041] Disabling lock debugging due to kernel taint [ 45.797928] BUG: Bad rss-counter state mm:00000000ed4a3696 type:MM_FILEPAGES val:33 [ 45.798920] BUG: Bad rss-counter state mm:00000000ed4a3696 type:MM_ANONPAGES val:22 [ 46.365103] BUG: Bad rss-counter state mm:00000000638da32a type:MM_FILEPAGES val:33 [ 46.366096] BUG: Bad rss-counter state mm:00000000638da32a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28469' (ECDSA) to the list of known hosts. 2023/06/20 00:42:18 fuzzer started 2023/06/20 00:42:19 dialing manager at localhost:44161 2023/06/20 00:42:19 checking machine... 2023/06/20 00:42:19 checking revisions... [ 47.026282] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:42:19 testing simple program... [ 47.079476] cgroup: Unknown subsys name 'net' [ 47.158513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:05 Registers: info registers vcpu 0 RAX=1ffffffff0c96049 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b0248 RBP=ffff888016a8fad8 RSP=ffff888016a8fa10 R8 =ffffffff864b024a R9 =ffff888016a8fac0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016a8fae0 R13=ffff888016a8fac8 R14=ffff888016a8ff58 R15=ffff888016a8fa80 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007f39a9c1d900 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=00007ffd026d3000 CR3=000000000ea62000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f038d8c7220 CR3=000000000d7be000 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=b4a1114bae31feafdc468840d8c1f401 XMM02=000000000011f188eff9b2d0a8fce9cb XMM03=000000000011f2582c67c8bc2e329bc3 XMM04=0f7bee64bbc2336500000000000ae988 XMM05=19e9129bd510f23500000000001356a8 XMM06=4fda316b135da52b0000000000135530 XMM07=e042d86d42eb936e0000000000125d30 XMM08=4bc8b9b5a87c495a000000000011f258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000