syzkaller login: [ 59.087570] BUG: Bad rss-counter state mm:0000000034757a6d type:MM_FILEPAGES val:33 [ 59.088627] BUG: Bad rss-counter state mm:0000000034757a6d type:MM_ANONPAGES val:22 [ 59.257378] ================================================================== [ 59.258377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.259321] Read of size 8 at addr ffff88800ecedb38 by task sshd/222 [ 59.260209] [ 59.260425] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.261296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.262289] Call Trace: [ 59.262610] [ 59.262890] dump_stack_lvl+0x91/0xf0 [ 59.263371] print_report+0xcc/0x620 [ 59.263856] ? __virt_addr_valid+0x102/0x340 [ 59.264402] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.265051] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.265673] kasan_report+0xbe/0xf0 [ 59.266142] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.266763] vma_interval_tree_remove+0xc75/0xec0 [ 59.267369] vma_prepare+0xc54/0x11a0 [ 59.267846] __split_vma+0x5af/0x950 [ 59.268318] ? __pfx___split_vma+0x10/0x10 [ 59.268844] ? find_held_lock+0x2c/0x110 [ 59.269367] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.269938] ? lock_is_held_type+0x9f/0x120 [ 59.270481] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.271086] ? mtree_range_walk+0x632/0x900 [ 59.271643] ? mas_walk+0x5c7/0x7c0 [ 59.272120] do_vmi_munmap+0x1f1/0x2b0 [ 59.272611] mmap_region+0x1f9/0x2660 [ 59.273110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.273624] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.274361] ? __pfx_lock_acquire+0x10/0x10 [ 59.274890] ? __pfx_mmap_region+0x10/0x10 [ 59.275428] ? security_mmap_addr+0x7d/0xa0 [ 59.275951] ? get_unmapped_area+0x1f5/0x3f0 [ 59.276501] do_mmap+0x854/0xf00 [ 59.276973] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.277467] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.278046] ksys_mmap_pgoff+0x3af/0x500 [ 59.278558] do_syscall_64+0x3f/0x90 [ 59.279039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.279690] RIP: 0033:0x7f03219d2d82 [ 59.280145] 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 [ 59.282309] RSP: 002b:00007ffd2121c468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.283227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03219d2d82 [ 59.284078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0320e0c000 [ 59.284928] RBP: 00007f0320e0c000 R08: 0000000000000009 R09: 0000000000001000 [ 59.285784] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561aac405ec0 [ 59.286627] R13: 00007ffd2121c480 R14: 00007ffd2121c4b0 R15: 00007ffd2121c810 [ 59.287483] [ 59.287777] [ 59.287993] Allocated by task 215: [ 59.288428] kasan_save_stack+0x22/0x50 [ 59.288927] kasan_set_track+0x25/0x30 [ 59.289449] __kasan_slab_alloc+0x59/0x70 [ 59.289975] kmem_cache_alloc+0x16b/0x370 [ 59.290492] vm_area_dup+0x20/0x160 [ 59.290948] __split_vma+0x170/0x950 [ 59.291412] split_vma+0xc6/0x110 [ 59.291852] mprotect_fixup+0x8d2/0xb30 [ 59.292348] do_mprotect_pkey+0x87e/0xd40 [ 59.292871] __x64_sys_mprotect+0x78/0xc0 [ 59.293400] do_syscall_64+0x3f/0x90 [ 59.293879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.294518] [ 59.294736] Freed by task 19: [ 59.295121] kasan_save_stack+0x22/0x50 [ 59.295624] kasan_set_track+0x25/0x30 [ 59.296112] kasan_save_free_info+0x2b/0x50 [ 59.296641] __kasan_slab_free+0x10a/0x190 [ 59.297172] kmem_cache_free+0x10d/0x4d0 [ 59.297685] rcu_core+0x8c8/0x2860 [ 59.298122] __do_softirq+0x1b7/0x7d4 [ 59.298607] [ 59.298825] Last potentially related work creation: [ 59.299413] kasan_save_stack+0x22/0x50 [ 59.299920] __kasan_record_aux_stack+0x8e/0xa0 [ 59.300500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.301153] remove_vma+0x139/0x170 [ 59.301606] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.302158] do_vmi_munmap+0x1f1/0x2b0 [ 59.302647] __vm_munmap+0x138/0x3a0 [ 59.303115] __x64_sys_munmap+0x59/0x80 [ 59.303613] do_syscall_64+0x3f/0x90 [ 59.304084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.304727] [ 59.304944] The buggy address belongs to the object at ffff88800ecedae0 [ 59.304944] which belongs to the cache vm_area_struct of size 168 [ 59.306406] The buggy address is located 88 bytes inside of [ 59.306406] freed 168-byte region [ffff88800ecedae0, ffff88800ecedb88) [ 59.307797] [ 59.308016] The buggy address belongs to the physical page: [ 59.308683] page:0000000072fdd06d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeced [ 59.309769] memcg:ffff88800e55df01 [ 59.310191] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.310832] page_type: 0xffffffff() [ 59.311287] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.312217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e55df01 [ 59.313142] page dumped because: kasan: bad access detected [ 59.313806] [ 59.314026] Memory state around the buggy address: [ 59.314610] ffff88800eceda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.315466] ffff88800eceda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 59.316327] >ffff88800ecedb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.317183] ^ [ 59.317784] ffff88800ecedb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 59.318639] ffff88800ecedc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 59.319482] ================================================================== [ 59.320445] Disabling lock debugging due to kernel taint [ 61.274034] BUG: Bad rss-counter state mm:0000000020dc8fdc type:MM_FILEPAGES val:33 [ 61.275129] BUG: Bad rss-counter state mm:0000000020dc8fdc type:MM_ANONPAGES val:22 [ 61.782598] BUG: Bad rss-counter state mm:00000000c85cd19a type:MM_FILEPAGES val:33 [ 61.783656] BUG: Bad rss-counter state mm:00000000c85cd19a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35884' (ECDSA) to the list of known hosts. 2023/06/20 11:22:37 fuzzer started 2023/06/20 11:22:37 dialing manager at localhost:36067 2023/06/20 11:22:38 checking machine... 2023/06/20 11:22:38 checking revisions... [ 62.505932] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:22:38 testing simple program... [ 62.553833] cgroup: Unknown subsys name 'net' [ 62.602542] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:37 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=00007f5235534a00 CR3=000000000d568000 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=76b28ba57a5548a9d84361492f90a97d XMM02=000000000011a810eff9b2d0a8fce9cb XMM03=000000000011a8e02c67c8bc2e329bc3 XMM04=0fe5731bbdead9af00000000000ae988 XMM05=59d5b690e0af863b0000000000132248 XMM06=00c3ffa147b8d85700000000001320d0 XMM07=e042d86d42eb936e00000000001227e0 XMM08=86996f9583e18afa000000000011a8e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81741318 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002674ee1 RSI=ffffffff81741318 RDI=ffff8880133a7778 RBP=ffff8880133a7748 RSP=ffff8880133a76a8 R8 =0000000000000001 R9 =ffff8880133a76f0 R10=0000000000038001 R11=000000000001e45f R12=ffff8880133a7778 R13=0000000000000000 R14=ffff8880159b3680 R15=0000000000000005 RIP=ffffffff84538440 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc63883900 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=00007fdc63848008 CR3=000000000e012000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000