syzkaller login: [ 47.870408] BUG: Bad rss-counter state mm:00000000941730e7 type:MM_FILEPAGES val:33 [ 47.871242] BUG: Bad rss-counter state mm:00000000941730e7 type:MM_ANONPAGES val:22 [ 47.978761] ================================================================== [ 47.979420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.980059] Read of size 8 at addr ffff88800f1c6058 by task sshd/222 [ 47.980595] [ 47.980768] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.981376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.982093] Call Trace: [ 47.982326] <TASK> [ 47.982510] dump_stack_lvl+0x91/0xf0 [ 47.983101] print_report+0xcc/0x620 [ 47.983413] ? __virt_addr_valid+0x102/0x340 [ 47.983781] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.984184] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.984617] kasan_report+0xbe/0xf0 [ 47.984957] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.985410] vma_interval_tree_remove+0xc75/0xec0 [ 47.985896] vma_prepare+0xc54/0x11a0 [ 47.986321] __split_vma+0x5af/0x950 [ 47.986736] ? __pfx___split_vma+0x10/0x10 [ 47.987127] ? find_held_lock+0x2c/0x110 [ 47.987477] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.988329] ? lock_is_held_type+0x9f/0x120 [ 47.988688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.989064] ? mtree_range_walk+0x632/0x900 [ 47.989398] ? mas_walk+0x5c7/0x7c0 [ 47.989683] do_vmi_munmap+0x1f1/0x2b0 [ 47.989983] mmap_region+0x1f9/0x2660 [ 47.990274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.990585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.991017] ? __pfx_lock_acquire+0x10/0x10 [ 47.991341] ? __pfx_mmap_region+0x10/0x10 [ 47.991686] ? security_mmap_addr+0x7d/0xa0 [ 47.992007] ? get_unmapped_area+0x1f5/0x3f0 [ 47.992343] do_mmap+0x854/0xf00 [ 47.992618] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.992930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.993291] ksys_mmap_pgoff+0x3af/0x500 [ 47.993617] do_syscall_64+0x3f/0x90 [ 47.993916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.994311] RIP: 0033:0x7f7fa93fed82 [ 47.994605] 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 [ 47.995968] RSP: 002b:00007ffd60453718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.996510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fa93fed82 [ 47.997015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fa8838000 [ 47.997528] RBP: 00007f7fa8838000 R08: 0000000000000009 R09: 0000000000001000 [ 47.998037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbf0398d90 [ 47.998547] R13: 00007ffd60453730 R14: 00007ffd60453760 R15: 00007ffd60453ac0 [ 47.999074] </TASK> [ 47.999250] [ 47.999380] Allocated by task 215: [ 47.999675] kasan_save_stack+0x22/0x50 [ 48.000021] kasan_set_track+0x25/0x30 [ 48.000364] __kasan_slab_alloc+0x59/0x70 [ 48.000726] kmem_cache_alloc+0x16b/0x370 [ 48.001055] vm_area_dup+0x20/0x160 [ 48.001344] __split_vma+0x170/0x950 [ 48.001661] split_vma+0xc6/0x110 [ 48.001954] mprotect_fixup+0x8d2/0xb30 [ 48.002291] do_mprotect_pkey+0x87e/0xd40 [ 48.002635] __x64_sys_mprotect+0x78/0xc0 [ 48.002973] do_syscall_64+0x3f/0x90 [ 48.003279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.003756] [ 48.003897] Freed by task 13: [ 48.004149] kasan_save_stack+0x22/0x50 [ 48.004478] kasan_set_track+0x25/0x30 [ 48.004792] kasan_save_free_info+0x2b/0x50 [ 48.005124] __kasan_slab_free+0x10a/0x190 [ 48.005472] kmem_cache_free+0x10d/0x4d0 [ 48.005797] rcu_core+0x8c8/0x2860 [ 48.006080] __do_softirq+0x1b7/0x7d4 [ 48.006388] [ 48.006524] Last potentially related work creation: [ 48.006913] kasan_save_stack+0x22/0x50 [ 48.007245] __kasan_record_aux_stack+0x8e/0xa0 [ 48.007655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.008089] remove_vma+0x139/0x170 [ 48.008393] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.008769] do_vmi_munmap+0x1f1/0x2b0 [ 48.009093] __vm_munmap+0x138/0x3a0 [ 48.009400] __x64_sys_munmap+0x59/0x80 [ 48.009723] do_syscall_64+0x3f/0x90 [ 48.010026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.010439] [ 48.010578] The buggy address belongs to the object at ffff88800f1c6000 [ 48.010578] which belongs to the cache vm_area_struct of size 168 [ 48.011529] The buggy address is located 88 bytes inside of [ 48.011529] freed 168-byte region [ffff88800f1c6000, ffff88800f1c60a8) [ 48.012458] [ 48.012603] The buggy address belongs to the physical page: [ 48.013037] page:000000005adcb5a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1c6 [ 48.013768] memcg:ffff888019cd2201 [ 48.014050] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.014479] page_type: 0xffffffff() [ 48.014785] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.015404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cd2201 [ 48.016053] page dumped because: kasan: bad access detected [ 48.016485] [ 48.016619] Memory state around the buggy address: [ 48.017000] ffff88800f1c5f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 48.017559] ffff88800f1c5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.018103] >ffff88800f1c6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.018661] ^ [ 48.019144] ffff88800f1c6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 48.019772] ffff88800f1c6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.020324] ================================================================== [ 48.021038] Disabling lock debugging due to kernel taint [ 49.856065] BUG: Bad rss-counter state mm:00000000b7e99945 type:MM_FILEPAGES val:33 [ 49.856756] BUG: Bad rss-counter state mm:00000000b7e99945 type:MM_ANONPAGES val:22 [ 50.134322] BUG: Bad rss-counter state mm:0000000095bde800 type:MM_FILEPAGES val:33 [ 50.135017] BUG: Bad rss-counter state mm:0000000095bde800 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41496' (ECDSA) to the list of known hosts. 2023/06/20 09:14:49 fuzzer started 2023/06/20 09:14:50 dialing manager at localhost:44161 2023/06/20 09:14:50 checking machine... 2023/06/20 09:14:50 checking revisions... [ 50.693324] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:14:50 testing simple program... [ 50.722910] cgroup: Unknown subsys name 'net' [ 50.754505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd90214f08 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=00007f91ad379510000055d669800790 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=ffff8880160a0000 RBX=ffffffff813ad420 RCX=ffff888016a07a20 RDX=0000000000000000 RSI=ffff8880160a0000 RDI=ffff888016a07988 RBP=ffff888016a07a20 RSP=ffff888016a07980 R8 =ffff888018564400 R9 =0000000000000000 R10=ffffed10030ac880 R11=0000000000000000 R12=ffff888016a07a50 R13=0000000000000000 R14=ffff8880160a0000 R15=0000000000000cc0 RIP=ffffffff81132a70 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f899741f900 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=00007ffd0b16d000 CR3=000000000c56a000 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