syzkaller login: [ 29.242319] BUG: Bad rss-counter state mm:00000000d07595f4 type:MM_FILEPAGES val:33 [ 29.244648] BUG: Bad rss-counter state mm:00000000d07595f4 type:MM_ANONPAGES val:22 [ 29.414230] ================================================================== [ 29.415310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.416458] Read of size 8 at addr ffff88801bc0adf0 by task sshd/221 [ 29.417521] [ 29.417784] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.418835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.420081] Call Trace: [ 29.420471] [ 29.420830] dump_stack_lvl+0x91/0xf0 [ 29.421427] print_report+0xcc/0x620 [ 29.422011] ? __virt_addr_valid+0x102/0x340 [ 29.422676] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.423432] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.424198] kasan_report+0xbe/0xf0 [ 29.424771] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.425520] vma_interval_tree_remove+0xc75/0xec0 [ 29.426257] vma_prepare+0xc54/0x11a0 [ 29.426845] __split_vma+0x5af/0x950 [ 29.427425] ? __pfx___split_vma+0x10/0x10 [ 29.428091] ? find_held_lock+0x2c/0x110 [ 29.428723] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.429412] ? lock_is_held_type+0x9f/0x120 [ 29.430058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.430801] ? mtree_range_walk+0x632/0x900 [ 29.431466] ? mas_walk+0x5c7/0x7c0 [ 29.432044] do_vmi_munmap+0x1f1/0x2b0 [ 29.432655] mmap_region+0x1f9/0x2660 [ 29.433248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.433862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.434737] ? __pfx_lock_acquire+0x10/0x10 [ 29.435380] ? __pfx_mmap_region+0x10/0x10 [ 29.436029] ? security_mmap_addr+0x7d/0xa0 [ 29.436684] ? get_unmapped_area+0x1f5/0x3f0 [ 29.437364] do_mmap+0x854/0xf00 [ 29.437897] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.438497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.439187] ksys_mmap_pgoff+0x3af/0x500 [ 29.439797] do_syscall_64+0x3f/0x90 [ 29.440403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.441180] RIP: 0033:0x7f34379c7d82 [ 29.441740] 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 [ 29.444372] RSP: 002b:00007ffc522ad858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.445484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34379c7d82 [ 29.446535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3436e01000 [ 29.447588] RBP: 00007f3436e01000 R08: 0000000000000009 R09: 0000000000001000 [ 29.448649] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606f3f2ab20 [ 29.449703] R13: 00007ffc522ad870 R14: 00007ffc522ad8a0 R15: 00007ffc522adc00 [ 29.450772] [ 29.451125] [ 29.451392] Allocated by task 214: [ 29.451923] kasan_save_stack+0x22/0x50 [ 29.452565] kasan_set_track+0x25/0x30 [ 29.453169] __kasan_slab_alloc+0x59/0x70 [ 29.453804] kmem_cache_alloc+0x16b/0x370 [ 29.454443] vm_area_dup+0x20/0x160 [ 29.454995] __split_vma+0x170/0x950 [ 29.455557] split_vma+0xc6/0x110 [ 29.456090] mprotect_fixup+0x8d2/0xb30 [ 29.456604] do_mprotect_pkey+0x87e/0xd40 [ 29.457128] __x64_sys_mprotect+0x78/0xc0 [ 29.457656] do_syscall_64+0x3f/0x90 [ 29.458124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.458764] [ 29.458984] Freed by task 214: [ 29.459375] kasan_save_stack+0x22/0x50 [ 29.459878] kasan_set_track+0x25/0x30 [ 29.460401] kasan_save_free_info+0x2b/0x50 [ 29.460941] __kasan_slab_free+0x10a/0x190 [ 29.461478] kmem_cache_free+0x10d/0x4d0 [ 29.461984] rcu_core+0x8c8/0x2860 [ 29.462428] __do_softirq+0x1b7/0x7d4 [ 29.462906] [ 29.463122] Last potentially related work creation: [ 29.463705] kasan_save_stack+0x22/0x50 [ 29.464222] __kasan_record_aux_stack+0x8e/0xa0 [ 29.464794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.465439] remove_vma+0x139/0x170 [ 29.465886] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.466438] do_vmi_munmap+0x1f1/0x2b0 [ 29.466924] __vm_munmap+0x138/0x3a0 [ 29.467388] __x64_sys_munmap+0x59/0x80 [ 29.467898] do_syscall_64+0x3f/0x90 [ 29.468377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.469024] [ 29.469240] The buggy address belongs to the object at ffff88801bc0ad98 [ 29.469240] which belongs to the cache vm_area_struct of size 168 [ 29.470693] The buggy address is located 88 bytes inside of [ 29.470693] freed 168-byte region [ffff88801bc0ad98, ffff88801bc0ae40) [ 29.472099] [ 29.472319] The buggy address belongs to the physical page: [ 29.472968] page:0000000073d76fcd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc0a [ 29.474056] memcg:ffff88800efff301 [ 29.474478] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.475123] page_type: 0xffffffff() [ 29.475576] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.476499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efff301 [ 29.477400] page dumped because: kasan: bad access detected [ 29.478057] [ 29.478269] Memory state around the buggy address: [ 29.478847] ffff88801bc0ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.479701] ffff88801bc0ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.480579] >ffff88801bc0ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.481432] ^ [ 29.482238] ffff88801bc0ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.483086] ffff88801bc0ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.483929] ================================================================== [ 29.484930] Disabling lock debugging due to kernel taint [ 31.458540] BUG: Bad rss-counter state mm:00000000b067e250 type:MM_FILEPAGES val:33 [ 31.459439] BUG: Bad rss-counter state mm:00000000b067e250 type:MM_ANONPAGES val:22 [ 31.999261] BUG: Bad rss-counter state mm:00000000229fece8 type:MM_FILEPAGES val:33 [ 32.000524] BUG: Bad rss-counter state mm:00000000229fece8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26996' (ECDSA) to the list of known hosts. 2023/06/20 04:51:32 fuzzer started 2023/06/20 04:51:32 dialing manager at localhost:44161 2023/06/20 04:51:32 checking machine... 2023/06/20 04:51:32 checking revisions... [ 32.713492] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:51:32 testing simple program... [ 32.766635] cgroup: Unknown subsys name 'net' [ 32.819744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:26 Registers: info registers vcpu 0 RAX=ffffea0000336880 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000007 RSI=ffffffff818060d2 RDI=0000000000000000 RBP=ffff88806ce3de20 RSP=ffff888019d7f9c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000344080 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff81806132 RFL=00000082 [--S----] 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 00007f50f0fb8900 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=00007f50f156f618 CR3=00000000166aa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 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=00007f714e90ffe0 CR3=000000000f398000 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=4153fb0eb2cc97b1b14a121d9573fd01 XMM02=2c67c8bc2e329bc30000000000121a28 XMM03=fb795ef6d65770560000000000124060 XMM04=2e9f69cae6d06c6100000000000ae988 XMM05=e4cb8bb95a7664b60000000000133bd8 XMM06=71e5480755347b0c0000000000132db0 XMM07=e042d86d42eb936e00000000001242e0 XMM08=cfb937776fcb2d870000000000121a88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000