syzkaller login: [ 31.114814] BUG: Bad rss-counter state mm:00000000aa788130 type:MM_FILEPAGES val:33 [ 31.116247] BUG: Bad rss-counter state mm:00000000aa788130 type:MM_ANONPAGES val:22 [ 31.259935] ================================================================== [ 31.260846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.261796] Read of size 8 at addr ffff88800de79228 by task sshd/222 [ 31.262583] [ 31.262813] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.263818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.264803] Call Trace: [ 31.265136] [ 31.265424] dump_stack_lvl+0x91/0xf0 [ 31.265936] print_report+0xcc/0x620 [ 31.266432] ? __virt_addr_valid+0x102/0x340 [ 31.267015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268275] kasan_report+0xbe/0xf0 [ 31.268752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269369] vma_interval_tree_remove+0xc75/0xec0 [ 31.269976] vma_prepare+0xc54/0x11a0 [ 31.270456] __split_vma+0x5af/0x950 [ 31.270964] ? __pfx___split_vma+0x10/0x10 [ 31.271494] ? find_held_lock+0x2c/0x110 [ 31.272020] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.272594] ? lock_is_held_type+0x9f/0x120 [ 31.273134] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.273742] ? mtree_range_walk+0x632/0x900 [ 31.274298] ? mas_walk+0x5c7/0x7c0 [ 31.274793] do_vmi_munmap+0x1f1/0x2b0 [ 31.275287] mmap_region+0x1f9/0x2660 [ 31.275778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.277021] ? __pfx_lock_acquire+0x10/0x10 [ 31.277565] ? __pfx_mmap_region+0x10/0x10 [ 31.278096] ? security_mmap_addr+0x7d/0xa0 [ 31.278630] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279207] do_mmap+0x854/0xf00 [ 31.279652] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280728] ksys_mmap_pgoff+0x3af/0x500 [ 31.281236] do_syscall_64+0x3f/0x90 [ 31.281713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282359] RIP: 0033:0x7fe2249efd82 [ 31.282830] 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 [ 31.284951] RSP: 002b:00007ffe790daa48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2249efd82 [ 31.286734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe223e29000 [ 31.287588] RBP: 00007fe223e29000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288437] R10: 0000000000000812 R11: 0000000000000206 R12: 000056304e4cfec0 [ 31.289290] R13: 00007ffe790daa60 R14: 00007ffe790daa90 R15: 00007ffe790dadf0 [ 31.290152] [ 31.290445] [ 31.290663] Allocated by task 215: [ 31.291100] kasan_save_stack+0x22/0x50 [ 31.291607] kasan_set_track+0x25/0x30 [ 31.292098] __kasan_slab_alloc+0x59/0x70 [ 31.292623] kmem_cache_alloc+0x16b/0x370 [ 31.293136] vm_area_dup+0x20/0x160 [ 31.293601] __split_vma+0x170/0x950 [ 31.294075] split_vma+0xc6/0x110 [ 31.294518] mprotect_fixup+0x8d2/0xb30 [ 31.295034] do_mprotect_pkey+0x87e/0xd40 [ 31.295554] __x64_sys_mprotect+0x78/0xc0 [ 31.296081] do_syscall_64+0x3f/0x90 [ 31.296570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297216] [ 31.297433] Freed by task 215: [ 31.297830] kasan_save_stack+0x22/0x50 [ 31.298339] kasan_set_track+0x25/0x30 [ 31.298850] kasan_save_free_info+0x2b/0x50 [ 31.299384] __kasan_slab_free+0x10a/0x190 [ 31.299922] kmem_cache_free+0x10d/0x4d0 [ 31.300429] rcu_core+0x8c8/0x2860 [ 31.300874] __do_softirq+0x1b7/0x7d4 [ 31.301353] [ 31.301570] Last potentially related work creation: [ 31.302160] kasan_save_stack+0x22/0x50 [ 31.302662] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.303888] remove_vma+0x139/0x170 [ 31.304338] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.304953] do_vmi_munmap+0x1f1/0x2b0 [ 31.305454] __vm_munmap+0x138/0x3a0 [ 31.305918] __x64_sys_munmap+0x59/0x80 [ 31.306420] do_syscall_64+0x3f/0x90 [ 31.306916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307567] [ 31.307780] The buggy address belongs to the object at ffff88800de791d0 [ 31.307780] which belongs to the cache vm_area_struct of size 168 [ 31.309239] The buggy address is located 88 bytes inside of [ 31.309239] freed 168-byte region [ffff88800de791d0, ffff88800de79278) [ 31.310639] [ 31.310859] The buggy address belongs to the physical page: [ 31.311534] page:0000000065f99de0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800de790e8 pfn:0xde79 [ 31.312758] memcg:ffff88800fe72601 [ 31.313188] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.313834] page_type: 0xffffffff() [ 31.314286] raw: 0100000000000200 ffff8880087a0c80 ffffea000051f790 ffffea0000251390 [ 31.315220] raw: ffff88800de790e8 000000000011000f 00000001ffffffff ffff88800fe72601 [ 31.316131] page dumped because: kasan: bad access detected [ 31.316789] [ 31.317007] Memory state around the buggy address: [ 31.317591] ffff88800de79100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318445] ffff88800de79180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.319324] >ffff88800de79200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.320168] ^ [ 31.320734] ffff88800de79280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.321583] ffff88800de79300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.322436] ================================================================== [ 31.323370] Disabling lock debugging due to kernel taint [ 34.099141] BUG: Bad rss-counter state mm:000000003bffa843 type:MM_FILEPAGES val:33 [ 34.100308] BUG: Bad rss-counter state mm:000000003bffa843 type:MM_ANONPAGES val:22 [ 34.503820] BUG: Bad rss-counter state mm:000000001972f8b6 type:MM_FILEPAGES val:33 [ 34.504843] BUG: Bad rss-counter state mm:000000001972f8b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45340' (ECDSA) to the list of known hosts. 2023/06/20 23:56:01 fuzzer started 2023/06/20 23:56:02 dialing manager at localhost:36067 2023/06/20 23:56:02 checking machine... 2023/06/20 23:56:02 checking revisions... [ 35.215869] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:56:02 testing simple program... [ 35.264051] cgroup: Unknown subsys name 'net' [ 35.317916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f46ca149650 CR3=000000000fec6000 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=2031303a36353a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36353a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000209b0c17 RBX=00000000143e04d9 RCX=00000000209b0c17 RDX=0000000000000007 RSI=0000000000000002 RDI=00000000f2b280a9 RBP=ffffffff813782f8 RSP=ffff88806cf09b68 R8 =0000000023c0916b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270533 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f22fb10b900 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=00007f22fa527d80 CR3=000000000ebf4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d6933586c34554b300000000000ae988 XMM05=18008883e8933b060000000000132318 XMM06=00c3ffa147b8d8570000000000131108 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000