syzkaller login: [ 30.565126] BUG: Bad rss-counter state mm:000000000ceee84b type:MM_FILEPAGES val:33 [ 30.566753] BUG: Bad rss-counter state mm:000000000ceee84b type:MM_ANONPAGES val:22 [ 30.751297] ================================================================== [ 30.752261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.753375] Read of size 8 at addr ffff88800ebbedf0 by task sshd/222 [ 30.754150] [ 30.754373] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.755467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.756538] Call Trace: [ 30.756880] [ 30.757186] dump_stack_lvl+0x91/0xf0 [ 30.757713] print_report+0xcc/0x620 [ 30.758226] ? __virt_addr_valid+0x102/0x340 [ 30.758815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759469] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760125] kasan_report+0xbe/0xf0 [ 30.760649] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761315] vma_interval_tree_remove+0xc75/0xec0 [ 30.761963] vma_prepare+0xc54/0x11a0 [ 30.762482] __split_vma+0x5af/0x950 [ 30.762983] ? __pfx___split_vma+0x10/0x10 [ 30.763540] ? find_held_lock+0x2c/0x110 [ 30.764114] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.764752] ? lock_is_held_type+0x9f/0x120 [ 30.765349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.766023] ? mtree_range_walk+0x632/0x900 [ 30.766629] ? mas_walk+0x5c7/0x7c0 [ 30.767157] do_vmi_munmap+0x1f1/0x2b0 [ 30.767701] mmap_region+0x1f9/0x2660 [ 30.768249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.768819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.769615] ? __pfx_lock_acquire+0x10/0x10 [ 30.770212] ? __pfx_mmap_region+0x10/0x10 [ 30.770804] ? security_mmap_addr+0x7d/0xa0 [ 30.771392] ? get_unmapped_area+0x1f5/0x3f0 [ 30.772001] do_mmap+0x854/0xf00 [ 30.772491] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.773032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.773649] ksys_mmap_pgoff+0x3af/0x500 [ 30.774207] do_syscall_64+0x3f/0x90 [ 30.774734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775442] RIP: 0033:0x7f4bf9d68d82 [ 30.775947] 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 [ 30.778282] RSP: 002b:00007fffb7ef7828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4bf9d68d82 [ 30.780214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4bf91a2000 [ 30.781180] RBP: 00007f4bf91a2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.782113] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f200a91f70 [ 30.783047] R13: 00007fffb7ef7840 R14: 00007fffb7ef7870 R15: 00007fffb7ef7bd0 [ 30.783986] [ 30.784318] [ 30.784550] Allocated by task 215: [ 30.785022] kasan_save_stack+0x22/0x50 [ 30.785577] kasan_set_track+0x25/0x30 [ 30.786121] __kasan_slab_alloc+0x59/0x70 [ 30.786700] kmem_cache_alloc+0x16b/0x370 [ 30.787266] vm_area_dup+0x20/0x160 [ 30.787767] __split_vma+0x170/0x950 [ 30.788281] split_vma+0xc6/0x110 [ 30.788765] mprotect_fixup+0x8d2/0xb30 [ 30.789315] do_mprotect_pkey+0x87e/0xd40 [ 30.789890] __x64_sys_mprotect+0x78/0xc0 [ 30.790463] do_syscall_64+0x3f/0x90 [ 30.790989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791696] [ 30.791932] Freed by task 19: [ 30.792377] kasan_save_stack+0x22/0x50 [ 30.792935] kasan_set_track+0x25/0x30 [ 30.793556] kasan_save_free_info+0x2b/0x50 [ 30.794142] __kasan_slab_free+0x10a/0x190 [ 30.794727] kmem_cache_free+0x10d/0x4d0 [ 30.795284] rcu_core+0x8c8/0x2860 [ 30.795777] __do_softirq+0x1b7/0x7d4 [ 30.796309] [ 30.796546] Last potentially related work creation: [ 30.797181] kasan_save_stack+0x22/0x50 [ 30.797734] __kasan_record_aux_stack+0x8e/0xa0 [ 30.798368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.799078] remove_vma+0x139/0x170 [ 30.799574] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.800187] do_vmi_munmap+0x1f1/0x2b0 [ 30.800745] __vm_munmap+0x138/0x3a0 [ 30.801261] __x64_sys_munmap+0x59/0x80 [ 30.801806] do_syscall_64+0x3f/0x90 [ 30.802328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803032] [ 30.803265] Second to last potentially related work creation: [ 30.804021] kasan_save_stack+0x22/0x50 [ 30.804578] __kasan_record_aux_stack+0x8e/0xa0 [ 30.805209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.805912] remove_vma+0x139/0x170 [ 30.806409] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.807019] do_vmi_munmap+0x1f1/0x2b0 [ 30.807551] mmap_region+0x1f9/0x2660 [ 30.808078] do_mmap+0x854/0xf00 [ 30.808559] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.809093] ksys_mmap_pgoff+0x3af/0x500 [ 30.809650] do_syscall_64+0x3f/0x90 [ 30.810172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810885] [ 30.811119] The buggy address belongs to the object at ffff88800ebbed98 [ 30.811119] which belongs to the cache vm_area_struct of size 168 [ 30.812744] The buggy address is located 88 bytes inside of [ 30.812744] freed 168-byte region [ffff88800ebbed98, ffff88800ebbee40) [ 30.814287] [ 30.814524] The buggy address belongs to the physical page: [ 30.815249] page:00000000a8c97354 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebbe [ 30.816444] memcg:ffff88800df1b801 [ 30.816916] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817681] page_type: 0xffffffff() [ 30.818171] raw: 0100000000000200 ffff8880087a0c80 ffffea0000260240 dead000000000003 [ 30.819190] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1b801 [ 30.820179] page dumped because: kasan: bad access detected [ 30.820950] [ 30.821192] Memory state around the buggy address: [ 30.821843] ffff88800ebbec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.822796] ffff88800ebbed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.823748] >ffff88800ebbed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.824699] ^ [ 30.825597] ffff88800ebbee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.826547] ffff88800ebbee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827489] ================================================================== [ 30.828641] Disabling lock debugging due to kernel taint [ 32.727069] BUG: Bad rss-counter state mm:000000003d297fc4 type:MM_FILEPAGES val:33 [ 32.728309] BUG: Bad rss-counter state mm:000000003d297fc4 type:MM_ANONPAGES val:22 [ 33.194043] BUG: Bad rss-counter state mm:00000000831418f5 type:MM_FILEPAGES val:33 [ 33.195112] BUG: Bad rss-counter state mm:00000000831418f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35992' (ECDSA) to the list of known hosts. 2023/06/20 19:58:13 fuzzer started 2023/06/20 19:58:13 dialing manager at localhost:36067 2023/06/20 19:58:13 checking machine... 2023/06/20 19:58:13 checking revisions... [ 33.926466] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:58:13 testing simple program... [ 33.982086] cgroup: Unknown subsys name 'net' [ 34.046263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002ce6fbd RCX=0000000000000000 RDX=ffff888016737e18 RSI=ffff888016737e08 RDI=0000000000000009 RBP=0000000000000009 RSP=ffff888016737da8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016737e18 R13=ffff888016737e08 R14=00007ffced645704 R15=dffffc0000000000 RIP=ffffffff814c0864 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 00007fcb9f429900 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=00007fcb9f9e0618 CR3=000000000f744000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7068a17430 CR3=000000000d692000 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=a6b8fc3a55a3fcae3342d489993b1da4 XMM02=000000000011d910ec2efd57dc4c00df XMM03=00000000001220b08c44ad5ab126b884 XMM04=48283aaab9dc4eaf00000000000ae988 XMM05=59d5b690e0af863b0000000000133250 XMM06=6f5f97a2e7b3c01a00000000001320b8 XMM07=e042d86d42eb936e0000000000122330 XMM08=8c44ad5ab126b884000000000011d970 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000