syzkaller login: [ 31.807683] BUG: Bad rss-counter state mm:00000000527090f3 type:MM_FILEPAGES val:33 [ 31.809052] BUG: Bad rss-counter state mm:00000000527090f3 type:MM_ANONPAGES val:22 [ 31.977968] ================================================================== [ 31.978978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.979967] Read of size 8 at addr ffff88800fd76a50 by task sshd/220 [ 31.980912] [ 31.981179] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.982084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.983128] Call Trace: [ 31.983460] [ 31.983751] dump_stack_lvl+0x91/0xf0 [ 31.984302] print_report+0xcc/0x620 [ 31.984803] ? __virt_addr_valid+0x102/0x340 [ 31.985381] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.986021] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.986669] kasan_report+0xbe/0xf0 [ 31.987163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.987815] vma_interval_tree_remove+0xc75/0xec0 [ 31.988455] vma_prepare+0xc54/0x11a0 [ 31.988958] __split_vma+0x5af/0x950 [ 31.989452] ? __pfx___split_vma+0x10/0x10 [ 31.990005] ? find_held_lock+0x2c/0x110 [ 31.990549] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.991139] ? lock_is_held_type+0x9f/0x120 [ 31.991710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.992358] ? mtree_range_walk+0x632/0x900 [ 31.992934] ? mas_walk+0x5c7/0x7c0 [ 31.993428] do_vmi_munmap+0x1f1/0x2b0 [ 31.993950] mmap_region+0x1f9/0x2660 [ 31.994453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.994996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.995748] ? __pfx_lock_acquire+0x10/0x10 [ 31.996322] ? __pfx_mmap_region+0x10/0x10 [ 31.996870] ? security_mmap_addr+0x7d/0xa0 [ 31.997425] ? get_unmapped_area+0x1f5/0x3f0 [ 31.998002] do_mmap+0x854/0xf00 [ 31.998454] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.998961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.999541] ksys_mmap_pgoff+0x3af/0x500 [ 32.000085] do_syscall_64+0x3f/0x90 [ 32.000583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.001249] RIP: 0033:0x7f3a04d73d82 [ 32.001714] 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 [ 32.003899] RSP: 002b:00007ffc99794b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.004841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a04d73d82 [ 32.005719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a041ad000 [ 32.006590] RBP: 00007f3a041ad000 R08: 0000000000000009 R09: 0000000000001000 [ 32.007461] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae1df83ec0 [ 32.008348] R13: 00007ffc99794b50 R14: 00007ffc99794b80 R15: 00007ffc99794ee0 [ 32.009237] [ 32.009536] [ 32.009758] Allocated by task 213: [ 32.010200] kasan_save_stack+0x22/0x50 [ 32.010719] kasan_set_track+0x25/0x30 [ 32.011229] __kasan_slab_alloc+0x59/0x70 [ 32.011775] kmem_cache_alloc+0x16b/0x370 [ 32.012329] vm_area_dup+0x20/0x160 [ 32.012804] __split_vma+0x170/0x950 [ 32.013286] split_vma+0xc6/0x110 [ 32.013740] mprotect_fixup+0x8d2/0xb30 [ 32.014262] do_mprotect_pkey+0x87e/0xd40 [ 32.014785] __x64_sys_mprotect+0x78/0xc0 [ 32.015317] do_syscall_64+0x3f/0x90 [ 32.015799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.016453] [ 32.016674] Freed by task 213: [ 32.017077] kasan_save_stack+0x22/0x50 [ 32.017595] kasan_set_track+0x25/0x30 [ 32.018098] kasan_save_free_info+0x2b/0x50 [ 32.018640] __kasan_slab_free+0x10a/0x190 [ 32.019179] kmem_cache_free+0x10d/0x4d0 [ 32.019705] rcu_core+0x8c8/0x2860 [ 32.020178] __do_softirq+0x1b7/0x7d4 [ 32.020669] [ 32.020890] Last potentially related work creation: [ 32.021484] kasan_save_stack+0x22/0x50 [ 32.022097] __kasan_record_aux_stack+0x8e/0xa0 [ 32.022689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.023346] remove_vma+0x139/0x170 [ 32.023806] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.024484] do_vmi_munmap+0x1f1/0x2b0 [ 32.024966] __vm_munmap+0x138/0x3a0 [ 32.025432] __x64_sys_munmap+0x59/0x80 [ 32.025921] do_syscall_64+0x3f/0x90 [ 32.026401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.027040] [ 32.027256] The buggy address belongs to the object at ffff88800fd769f8 [ 32.027256] which belongs to the cache vm_area_struct of size 168 [ 32.028743] The buggy address is located 88 bytes inside of [ 32.028743] freed 168-byte region [ffff88800fd769f8, ffff88800fd76aa0) [ 32.030201] [ 32.030463] The buggy address belongs to the physical page: [ 32.031248] page:000000001f97b206 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd76 [ 32.032548] memcg:ffff88800dc76601 [ 32.033056] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.033822] page_type: 0xffffffff() [ 32.034359] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c4c0 dead000000000008 [ 32.035455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc76601 [ 32.036556] page dumped because: kasan: bad access detected [ 32.037345] [ 32.037601] Memory state around the buggy address: [ 32.038291] ffff88800fd76900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.039318] ffff88800fd76980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.040344] >ffff88800fd76a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.041358] ^ [ 32.042185] ffff88800fd76a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.043205] ffff88800fd76b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.044232] ================================================================== [ 32.045471] Disabling lock debugging due to kernel taint [ 34.293476] BUG: Bad rss-counter state mm:000000001f107981 type:MM_FILEPAGES val:33 [ 34.294661] BUG: Bad rss-counter state mm:000000001f107981 type:MM_ANONPAGES val:22 [ 34.743256] BUG: Bad rss-counter state mm:00000000b56ca99d type:MM_FILEPAGES val:33 [ 34.744531] BUG: Bad rss-counter state mm:00000000b56ca99d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7121' (ECDSA) to the list of known hosts. 2023/06/21 05:12:04 fuzzer started 2023/06/21 05:12:05 dialing manager at localhost:36067 2023/06/21 05:12:05 checking machine... 2023/06/21 05:12:05 checking revisions... [ 35.469752] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:05 testing simple program... [ 35.517634] cgroup: Unknown subsys name 'net' [ 35.569659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=000000000002c3c0 RCX=0000000000000000 RDX=1ffff110028d5675 RSI=ffffffff8145347c RDI=ffff8880146ab000 RBP=ffffffff852c7900 RSP=ffff888014677e08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880146ab000 R13=0000000000000000 R14=ffff88806ce00000 R15=ffff8880146ab3a8 RIP=ffffffff814534c2 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efd6104a900 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=00007efd604a4d10 CR3=000000000c66e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5d4c3ad149578f4500000000000ae988 XMM05=677f87478d4116480000000000132d08 XMM06=55885eb9b5a0d6570000000000131db0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636216 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003263eaf RSI=ffffffff83636216 RDI=ffff88801931f5e8 RBP=ffff88801931f5b8 RSP=ffff88801931f518 R8 =0000000000000001 R9 =ffff88801931f560 R10=0000000000038001 R11=000000000008a835 R12=ffff88801931f5e8 R13=0000000000000000 R14=ffff888019481b40 R15=00000000000000a4 RIP=ffffffff813ad470 RFL=00000282 [--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 00007fe0c86d8900 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=00007ffc27aa2000 CR3=00000000099b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000