syzkaller login: [ 60.830387] BUG: Bad rss-counter state mm:000000003f917f1b type:MM_FILEPAGES val:33 [ 60.832029] BUG: Bad rss-counter state mm:000000003f917f1b type:MM_ANONPAGES val:22 [ 60.994575] ================================================================== [ 60.995740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.997052] Read of size 8 at addr ffff88800c6d8b38 by task sshd/220 [ 60.997899] [ 60.998131] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.999070] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.000115] Call Trace: [ 61.000455] [ 61.000758] dump_stack_lvl+0x91/0xf0 [ 61.001281] print_report+0xcc/0x620 [ 61.001802] ? __virt_addr_valid+0x102/0x340 [ 61.002398] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.003071] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.003740] kasan_report+0xbe/0xf0 [ 61.004273] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.004952] vma_interval_tree_remove+0xc75/0xec0 [ 61.005639] vma_prepare+0xc54/0x11a0 [ 61.006172] __split_vma+0x5af/0x950 [ 61.006703] ? __pfx___split_vma+0x10/0x10 [ 61.007276] ? find_held_lock+0x2c/0x110 [ 61.007849] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.008469] ? lock_is_held_type+0x9f/0x120 [ 61.009054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.009735] ? mtree_range_walk+0x632/0x900 [ 61.010347] ? mas_walk+0x5c7/0x7c0 [ 61.010871] do_vmi_munmap+0x1f1/0x2b0 [ 61.011416] mmap_region+0x1f9/0x2660 [ 61.011950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.012516] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.013305] ? __pfx_lock_acquire+0x10/0x10 [ 61.013900] ? __pfx_mmap_region+0x10/0x10 [ 61.014487] ? security_mmap_addr+0x7d/0xa0 [ 61.015075] ? get_unmapped_area+0x1f5/0x3f0 [ 61.015681] do_mmap+0x854/0xf00 [ 61.016169] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.016721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.017343] ksys_mmap_pgoff+0x3af/0x500 [ 61.017934] do_syscall_64+0x3f/0x90 [ 61.018465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.019178] RIP: 0033:0x7f98bfaf0d82 [ 61.019686] 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 [ 61.022062] RSP: 002b:00007ffe14281408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.023059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98bfaf0d82 [ 61.023998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98bef2a000 [ 61.024944] RBP: 00007f98bef2a000 R08: 0000000000000009 R09: 0000000000001000 [ 61.025914] R10: 0000000000000812 R11: 0000000000000206 R12: 000056110cec6ec0 [ 61.026849] R13: 00007ffe14281420 R14: 00007ffe14281450 R15: 00007ffe142817b0 [ 61.027847] [ 61.028178] [ 61.028418] Allocated by task 213: [ 61.028899] kasan_save_stack+0x22/0x50 [ 61.029464] kasan_set_track+0x25/0x30 [ 61.030035] __kasan_slab_alloc+0x59/0x70 [ 61.030620] kmem_cache_alloc+0x16b/0x370 [ 61.031198] vm_area_dup+0x20/0x160 [ 61.031708] __split_vma+0x170/0x950 [ 61.032231] split_vma+0xc6/0x110 [ 61.032722] mprotect_fixup+0x8d2/0xb30 [ 61.033281] do_mprotect_pkey+0x87e/0xd40 [ 61.033874] __x64_sys_mprotect+0x78/0xc0 [ 61.034459] do_syscall_64+0x3f/0x90 [ 61.034987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.035706] [ 61.035947] Freed by task 13: [ 61.036384] kasan_save_stack+0x22/0x50 [ 61.036957] kasan_set_track+0x25/0x30 [ 61.037477] kasan_save_free_info+0x2b/0x50 [ 61.038054] __kasan_slab_free+0x10a/0x190 [ 61.038612] kmem_cache_free+0x10d/0x4d0 [ 61.039141] rcu_core+0x8c8/0x2860 [ 61.039617] __do_softirq+0x1b7/0x7d4 [ 61.040162] [ 61.040398] Last potentially related work creation: [ 61.041033] kasan_save_stack+0x22/0x50 [ 61.041594] __kasan_record_aux_stack+0x8e/0xa0 [ 61.042213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.042910] remove_vma+0x139/0x170 [ 61.043402] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.044004] do_vmi_munmap+0x1f1/0x2b0 [ 61.044531] __vm_munmap+0x138/0x3a0 [ 61.045040] __x64_sys_munmap+0x59/0x80 [ 61.045587] do_syscall_64+0x3f/0x90 [ 61.046108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.046837] [ 61.047070] Second to last potentially related work creation: [ 61.047840] kasan_save_stack+0x22/0x50 [ 61.048397] __kasan_record_aux_stack+0x8e/0xa0 [ 61.049024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.049744] remove_vma+0x139/0x170 [ 61.050245] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.050859] do_vmi_munmap+0x1f1/0x2b0 [ 61.051387] mmap_region+0x1f9/0x2660 [ 61.051917] do_mmap+0x854/0xf00 [ 61.052394] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.052927] ksys_mmap_pgoff+0x3af/0x500 [ 61.053478] do_syscall_64+0x3f/0x90 [ 61.054008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.054721] [ 61.054958] The buggy address belongs to the object at ffff88800c6d8ae0 [ 61.054958] which belongs to the cache vm_area_struct of size 168 [ 61.056556] The buggy address is located 88 bytes inside of [ 61.056556] freed 168-byte region [ffff88800c6d8ae0, ffff88800c6d8b88) [ 61.058114] [ 61.058355] The buggy address belongs to the physical page: [ 61.059081] page:0000000014b2ec7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d8 [ 61.060281] memcg:ffff8880140d2001 [ 61.060757] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.061547] page_type: 0xffffffff() [ 61.062046] raw: 0100000000000200 ffff8880087a0c80 ffffea000050c5c0 dead000000000003 [ 61.063099] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140d2001 [ 61.064121] page dumped because: kasan: bad access detected [ 61.064860] [ 61.065099] Memory state around the buggy address: [ 61.065762] ffff88800c6d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.066714] ffff88800c6d8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.067661] >ffff88800c6d8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.068603] ^ [ 61.069281] ffff88800c6d8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.070231] ffff88800c6d8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.071176] ================================================================== [ 61.072424] Disabling lock debugging due to kernel taint [ 62.628125] BUG: Bad rss-counter state mm:0000000040be6901 type:MM_FILEPAGES val:33 [ 62.629294] BUG: Bad rss-counter state mm:0000000040be6901 type:MM_ANONPAGES val:22 [ 63.020076] BUG: Bad rss-counter state mm:00000000c2eb8f0e type:MM_FILEPAGES val:33 [ 63.020858] BUG: Bad rss-counter state mm:00000000c2eb8f0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35897' (ECDSA) to the list of known hosts. 2023/06/20 16:50:03 fuzzer started 2023/06/20 16:50:03 dialing manager at localhost:36067 2023/06/20 16:50:03 checking machine... 2023/06/20 16:50:03 checking revisions... [ 63.739605] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:50:03 testing simple program... [ 63.793263] cgroup: Unknown subsys name 'net' [ 63.831851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:03 Registers: info registers vcpu 0 RAX=ffff88800c606b80 RBX=ffff88801594ec00 RCX=000000000000000a RDX=0000000000001400 RSI=ffff88800c606b00 RDI=ffff8880087a08c0 RBP=ffff88806ce09e08 RSP=ffff88806ce09de0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6a61 R12=ffff8880087a08c0 R13=ffffea0000565200 R14=ffffffff81165022 R15=ffff88800f6d6680 RIP=ffffffff81809df3 RFL=00000212 [----A--] 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 00007f3398d1c900 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=00007f33992d40b0 CR3=000000000f04a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffd9c3d5988 CR3=0000000005482000 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=00007f6607d3f510000055c72bc88790 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