syzkaller login: [ 30.723700] BUG: Bad rss-counter state mm:000000004c7cb3c5 type:MM_FILEPAGES val:33 [ 30.725025] BUG: Bad rss-counter state mm:000000004c7cb3c5 type:MM_ANONPAGES val:22 [ 30.874181] ================================================================== [ 30.875097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.876041] Read of size 8 at addr ffff888016dc3968 by task sshd/222 [ 30.876838] [ 30.877058] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.878121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.879111] Call Trace: [ 30.879430] [ 30.879719] dump_stack_lvl+0x91/0xf0 [ 30.880225] print_report+0xcc/0x620 [ 30.880724] ? __virt_addr_valid+0x102/0x340 [ 30.881272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881904] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882532] kasan_report+0xbe/0xf0 [ 30.883010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883630] vma_interval_tree_remove+0xc75/0xec0 [ 30.884242] vma_prepare+0xc54/0x11a0 [ 30.884729] __split_vma+0x5af/0x950 [ 30.885204] ? __pfx___split_vma+0x10/0x10 [ 30.885729] ? find_held_lock+0x2c/0x110 [ 30.886245] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.886809] ? lock_is_held_type+0x9f/0x120 [ 30.887348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.887954] ? mtree_range_walk+0x632/0x900 [ 30.888527] ? mas_walk+0x5c7/0x7c0 [ 30.889003] do_vmi_munmap+0x1f1/0x2b0 [ 30.889495] mmap_region+0x1f9/0x2660 [ 30.889976] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.890492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.891199] ? __pfx_lock_acquire+0x10/0x10 [ 30.891737] ? __pfx_mmap_region+0x10/0x10 [ 30.892273] ? security_mmap_addr+0x7d/0xa0 [ 30.892814] ? get_unmapped_area+0x1f5/0x3f0 [ 30.893365] do_mmap+0x854/0xf00 [ 30.893804] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.894300] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.894862] ksys_mmap_pgoff+0x3af/0x500 [ 30.895373] do_syscall_64+0x3f/0x90 [ 30.895850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.896517] RIP: 0033:0x7f19489bfd82 [ 30.896977] 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 [ 30.899143] RSP: 002b:00007fff8da49e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.900063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19489bfd82 [ 30.900941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1947df9000 [ 30.901798] RBP: 00007f1947df9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.902650] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db3284fec0 [ 30.903505] R13: 00007fff8da49e30 R14: 00007fff8da49e60 R15: 00007fff8da4a1c0 [ 30.904364] [ 30.904672] [ 30.904892] Allocated by task 215: [ 30.905324] kasan_save_stack+0x22/0x50 [ 30.905833] kasan_set_track+0x25/0x30 [ 30.906330] __kasan_slab_alloc+0x59/0x70 [ 30.906852] kmem_cache_alloc+0x16b/0x370 [ 30.907366] vm_area_dup+0x20/0x160 [ 30.907822] __split_vma+0x170/0x950 [ 30.908288] split_vma+0xc6/0x110 [ 30.908734] mprotect_fixup+0x8d2/0xb30 [ 30.909233] do_mprotect_pkey+0x87e/0xd40 [ 30.909755] __x64_sys_mprotect+0x78/0xc0 [ 30.910278] do_syscall_64+0x3f/0x90 [ 30.910757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.911402] [ 30.911616] Freed by task 205: [ 30.912011] kasan_save_stack+0x22/0x50 [ 30.912519] kasan_set_track+0x25/0x30 [ 30.913012] kasan_save_free_info+0x2b/0x50 [ 30.913544] __kasan_slab_free+0x10a/0x190 [ 30.914072] kmem_cache_free+0x10d/0x4d0 [ 30.914580] rcu_core+0x8c8/0x2860 [ 30.915019] __do_softirq+0x1b7/0x7d4 [ 30.915498] [ 30.915715] Last potentially related work creation: [ 30.916302] kasan_save_stack+0x22/0x50 [ 30.916824] __kasan_record_aux_stack+0x8e/0xa0 [ 30.917409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.918058] remove_vma+0x139/0x170 [ 30.918507] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.919143] do_vmi_munmap+0x1f1/0x2b0 [ 30.919630] __vm_munmap+0x138/0x3a0 [ 30.920095] __x64_sys_munmap+0x59/0x80 [ 30.920602] do_syscall_64+0x3f/0x90 [ 30.921090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.921730] [ 30.921946] The buggy address belongs to the object at ffff888016dc3910 [ 30.921946] which belongs to the cache vm_area_struct of size 168 [ 30.923419] The buggy address is located 88 bytes inside of [ 30.923419] freed 168-byte region [ffff888016dc3910, ffff888016dc39b8) [ 30.924842] [ 30.925056] The buggy address belongs to the physical page: [ 30.925724] page:00000000e8f9969c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16dc3 [ 30.926830] memcg:ffff888019f48801 [ 30.927258] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.927910] page_type: 0xffffffff() [ 30.928363] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.929300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f48801 [ 30.930218] page dumped because: kasan: bad access detected [ 30.930877] [ 30.931092] Memory state around the buggy address: [ 30.931677] ffff888016dc3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.932569] ffff888016dc3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.933430] >ffff888016dc3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.934283] ^ [ 30.935064] ffff888016dc3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.935921] ffff888016dc3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.936793] ================================================================== [ 30.937714] Disabling lock debugging due to kernel taint [ 32.990323] BUG: Bad rss-counter state mm:000000004767eb0d type:MM_FILEPAGES val:33 [ 32.991481] BUG: Bad rss-counter state mm:000000004767eb0d type:MM_ANONPAGES val:22 [ 33.393542] BUG: Bad rss-counter state mm:000000005e0fde0f type:MM_FILEPAGES val:33 [ 33.394715] BUG: Bad rss-counter state mm:000000005e0fde0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56886' (ECDSA) to the list of known hosts. 2023/06/21 07:12:29 fuzzer started 2023/06/21 07:12:30 dialing manager at localhost:36067 2023/06/21 07:12:30 checking machine... 2023/06/21 07:12:30 checking revisions... [ 34.157404] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:12:30 testing simple program... [ 34.200655] cgroup: Unknown subsys name 'net' [ 34.247450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:29 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=0000000000000001 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=00007ffd474dd398 CR3=0000000005482000 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=00007f4ab1c38510000055d3a88d9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000b RCX=0000000000000000 RDX=ffff8880134251c0 RSI=ffffffff8314631e RDI=ffffffff87f97640 RBP=ffffffff87f97640 RSP=ffff888015c77ab0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888015c77b38 R14=ffff888015c77b38 R15=00000000000000e7 RIP=ffffffff8135bd44 RFL=00000293 [--S-A-C] 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 00007f63f4a4c900 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=00007ffe7eaeb000 CR3=000000000ee14000 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