syzkaller login: [ 31.072623] BUG: Bad rss-counter state mm:000000003fb5f873 type:MM_FILEPAGES val:33 [ 31.074098] BUG: Bad rss-counter state mm:000000003fb5f873 type:MM_ANONPAGES val:22 [ 31.259377] ================================================================== [ 31.260531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.261780] Read of size 8 at addr ffff88800ee29b38 by task sshd/220 [ 31.262785] [ 31.263081] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.264180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.265359] Call Trace: [ 31.265720] [ 31.266040] dump_stack_lvl+0x91/0xf0 [ 31.266641] print_report+0xcc/0x620 [ 31.267194] ? __virt_addr_valid+0x102/0x340 [ 31.267879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268615] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269284] kasan_report+0xbe/0xf0 [ 31.269800] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270477] vma_interval_tree_remove+0xc75/0xec0 [ 31.271131] vma_prepare+0xc54/0x11a0 [ 31.271671] __split_vma+0x5af/0x950 [ 31.272185] ? __pfx___split_vma+0x10/0x10 [ 31.272769] ? find_held_lock+0x2c/0x110 [ 31.273353] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.274117] ? lock_is_held_type+0x9f/0x120 [ 31.274837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.275662] ? mtree_range_walk+0x632/0x900 [ 31.276406] ? mas_walk+0x5c7/0x7c0 [ 31.276957] do_vmi_munmap+0x1f1/0x2b0 [ 31.277515] mmap_region+0x1f9/0x2660 [ 31.278046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.278618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279435] ? __pfx_lock_acquire+0x10/0x10 [ 31.280021] ? __pfx_mmap_region+0x10/0x10 [ 31.280624] ? security_mmap_addr+0x7d/0xa0 [ 31.281244] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281871] do_mmap+0x854/0xf00 [ 31.282403] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.283069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.283844] ksys_mmap_pgoff+0x3af/0x500 [ 31.284512] do_syscall_64+0x3f/0x90 [ 31.285163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285979] RIP: 0033:0x7ffb01456d82 [ 31.286500] 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 [ 31.288897] RSP: 002b:00007ffc1de80fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.289918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb01456d82 [ 31.290871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb00890000 [ 31.291846] RBP: 00007ffb00890000 R08: 0000000000000009 R09: 0000000000001000 [ 31.292778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edb8631ec0 [ 31.293689] R13: 00007ffc1de81000 R14: 00007ffc1de81030 R15: 00007ffc1de81390 [ 31.294608] [ 31.294920] [ 31.295150] Allocated by task 213: [ 31.295616] kasan_save_stack+0x22/0x50 [ 31.296158] kasan_set_track+0x25/0x30 [ 31.296692] __kasan_slab_alloc+0x59/0x70 [ 31.297397] kmem_cache_alloc+0x16b/0x370 [ 31.298144] vm_area_dup+0x20/0x160 [ 31.298812] __split_vma+0x170/0x950 [ 31.299545] split_vma+0xc6/0x110 [ 31.300188] mprotect_fixup+0x8d2/0xb30 [ 31.300935] do_mprotect_pkey+0x87e/0xd40 [ 31.301712] __x64_sys_mprotect+0x78/0xc0 [ 31.302476] do_syscall_64+0x3f/0x90 [ 31.303250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304179] [ 31.304492] Freed by task 203: [ 31.305053] kasan_save_stack+0x22/0x50 [ 31.305774] kasan_set_track+0x25/0x30 [ 31.306485] kasan_save_free_info+0x2b/0x50 [ 31.307265] __kasan_slab_free+0x10a/0x190 [ 31.308039] kmem_cache_free+0x10d/0x4d0 [ 31.308770] rcu_core+0x8c8/0x2860 [ 31.309422] __do_softirq+0x1b7/0x7d4 [ 31.310140] [ 31.310450] Last potentially related work creation: [ 31.311344] kasan_save_stack+0x22/0x50 [ 31.312092] __kasan_record_aux_stack+0x8e/0xa0 [ 31.312918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313885] remove_vma+0x139/0x170 [ 31.314591] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.315455] do_vmi_munmap+0x1f1/0x2b0 [ 31.316178] __vm_munmap+0x138/0x3a0 [ 31.316879] __x64_sys_munmap+0x59/0x80 [ 31.317654] do_syscall_64+0x3f/0x90 [ 31.318362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319378] [ 31.319697] The buggy address belongs to the object at ffff88800ee29ae0 [ 31.319697] which belongs to the cache vm_area_struct of size 168 [ 31.321869] The buggy address is located 88 bytes inside of [ 31.321869] freed 168-byte region [ffff88800ee29ae0, ffff88800ee29b88) [ 31.323819] [ 31.324070] The buggy address belongs to the physical page: [ 31.324821] page:000000009ebabee9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee29 [ 31.326056] memcg:ffff888019bedc01 [ 31.326542] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.327288] page_type: 0xffffffff() [ 31.327800] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.328845] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bedc01 [ 31.329862] page dumped because: kasan: bad access detected [ 31.330611] [ 31.330855] Memory state around the buggy address: [ 31.331527] ffff88800ee29a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.332500] ffff88800ee29a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.333461] >ffff88800ee29b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.334415] ^ [ 31.335104] ffff88800ee29b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.336078] ffff88800ee29c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.337030] ================================================================== [ 31.338122] Disabling lock debugging due to kernel taint [ 34.047330] BUG: Bad rss-counter state mm:00000000f6a15bf8 type:MM_FILEPAGES val:33 [ 34.048522] BUG: Bad rss-counter state mm:00000000f6a15bf8 type:MM_ANONPAGES val:22 [ 34.506324] BUG: Bad rss-counter state mm:00000000daa7b731 type:MM_FILEPAGES val:33 [ 34.507974] BUG: Bad rss-counter state mm:00000000daa7b731 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48889' (ECDSA) to the list of known hosts. 2023/06/20 20:05:02 fuzzer started 2023/06/20 20:05:02 dialing manager at localhost:36067 2023/06/20 20:05:02 checking machine... 2023/06/20 20:05:02 checking revisions... [ 35.202751] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:05:03 testing simple program... [ 35.250636] cgroup: Unknown subsys name 'net' [ 35.303679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000662d993d RCX=ffffffff8219d359 RDX=ffff888014689b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888010176180 RSP=ffff8880147c7538 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff849f2d80 R14=0000000000000000 R15=ffff88801017617c RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9ac9524900 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=00007f9ac89ae7b0 CR3=000000000c452000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=acd354c1d84f001b00000000000ae988 XMM05=1c2fec4eb89bb0260000000000131aa8 XMM06=19e9129bd510f2350000000000130960 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861437f3 RBX=0000000000000001 RCX=ffffffff861437ee RDX=0000000000000000 RSI=1ffffffff0c286fe RDI=ffffffff85e050e0 RBP=ffff8880165b77f8 RSP=ffff8880165b7730 R8 =ffffffff861437b2 R9 =ffff8880165b77e0 R10=0000000000038001 R11=00000000000229c7 R12=ffff8880165b7800 R13=ffff8880165b77e8 R14=ffff8880165b77e1 R15=ffff8880165b77a0 RIP=ffffffff81130a5b 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 00007f0d1c410900 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=00007ffc74bf6ff8 CR3=000000000f0be000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000