[ 23.883850] BUG: Bad rss-counter state mm:000000004c231bee type:MM_FILEPAGES val:33 [ 23.885225] BUG: Bad rss-counter state mm:000000004c231bee type:MM_ANONPAGES val:22 [ 23.937951] ================================================================== [ 23.938835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.939782] Read of size 8 at addr ffff88800e08b4e0 by task sshd/220 [ 23.940550] [ 23.940772] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.941829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.942804] Call Trace: [ 23.943121] [ 23.943405] dump_stack_lvl+0x91/0xf0 [ 23.943934] print_report+0xcc/0x620 [ 23.944418] ? __virt_addr_valid+0x102/0x340 [ 23.944966] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945574] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.946188] kasan_report+0xbe/0xf0 [ 23.946661] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.947278] vma_interval_tree_remove+0xc75/0xec0 [ 23.947898] vma_prepare+0xc54/0x11a0 [ 23.948381] __split_vma+0x5af/0x950 [ 23.948853] ? __pfx___split_vma+0x10/0x10 [ 23.949388] ? find_held_lock+0x2c/0x110 [ 23.949914] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.950487] ? lock_is_held_type+0x9f/0x120 [ 23.951032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.951644] ? mtree_range_walk+0x632/0x900 [ 23.952192] ? mas_walk+0x5c7/0x7c0 [ 23.952668] do_vmi_munmap+0x1f1/0x2b0 [ 23.953156] mmap_region+0x1f9/0x2660 [ 23.953636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.954140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.954849] ? __pfx_lock_acquire+0x10/0x10 [ 23.955374] ? __pfx_mmap_region+0x10/0x10 [ 23.955917] ? security_mmap_addr+0x7d/0xa0 [ 23.956453] ? get_unmapped_area+0x1f5/0x3f0 [ 23.957011] do_mmap+0x854/0xf00 [ 23.957452] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.957951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.958509] ksys_mmap_pgoff+0x3af/0x500 [ 23.959023] do_syscall_64+0x3f/0x90 [ 23.959504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.960159] RIP: 0033:0x7f472496fd82 [ 23.960622] 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 [ 23.962839] RSP: 002b:00007ffda04e3278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.963766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f472496fd82 [ 23.964609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4723da9000 [ 23.965450] RBP: 00007f4723da9000 R08: 0000000000000009 R09: 0000000000001000 [ 23.966284] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d54bfab20 [ 23.967122] R13: 00007ffda04e3290 R14: 00007ffda04e32c0 R15: 00007ffda04e3620 [ 23.967991] [ 23.968286] [ 23.968503] Allocated by task 213: [ 23.968934] kasan_save_stack+0x22/0x50 [ 23.969438] kasan_set_track+0x25/0x30 [ 23.969935] __kasan_slab_alloc+0x59/0x70 [ 23.970458] kmem_cache_alloc+0x16b/0x370 [ 23.970974] vm_area_dup+0x20/0x160 [ 23.971433] __split_vma+0x170/0x950 [ 23.971922] split_vma+0xc6/0x110 [ 23.972362] mprotect_fixup+0x8d2/0xb30 [ 23.972866] do_mprotect_pkey+0x87e/0xd40 [ 23.973388] __x64_sys_mprotect+0x78/0xc0 [ 23.973918] do_syscall_64+0x3f/0x90 [ 23.974394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.975034] [ 23.975250] Freed by task 213: [ 23.975648] kasan_save_stack+0x22/0x50 [ 23.976148] kasan_set_track+0x25/0x30 [ 23.976640] kasan_save_free_info+0x2b/0x50 [ 23.977178] __kasan_slab_free+0x10a/0x190 [ 23.977713] kmem_cache_free+0x10d/0x4d0 [ 23.978221] rcu_core+0x8c8/0x2860 [ 23.978665] __do_softirq+0x1b7/0x7d4 [ 23.979146] [ 23.979362] Last potentially related work creation: [ 23.979959] kasan_save_stack+0x22/0x50 [ 23.980457] __kasan_record_aux_stack+0x8e/0xa0 [ 23.981034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.981669] remove_vma+0x139/0x170 [ 23.982122] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.982677] do_vmi_munmap+0x1f1/0x2b0 [ 23.983163] __vm_munmap+0x138/0x3a0 [ 23.983651] __x64_sys_munmap+0x59/0x80 [ 23.984149] do_syscall_64+0x3f/0x90 [ 23.984623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.985266] [ 23.985486] Second to last potentially related work creation: [ 23.986172] kasan_save_stack+0x22/0x50 [ 23.986677] __kasan_record_aux_stack+0x8e/0xa0 [ 23.987253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.987917] remove_vma+0x139/0x170 [ 23.988373] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.988932] do_vmi_munmap+0x1f1/0x2b0 [ 23.989426] mmap_region+0x1f9/0x2660 [ 23.989915] do_mmap+0x854/0xf00 [ 23.990354] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.990844] ksys_mmap_pgoff+0x3af/0x500 [ 23.991353] do_syscall_64+0x3f/0x90 [ 23.991862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.992506] [ 23.992723] The buggy address belongs to the object at ffff88800e08b488 [ 23.992723] which belongs to the cache vm_area_struct of size 168 [ 23.994186] The buggy address is located 88 bytes inside of [ 23.994186] freed 168-byte region [ffff88800e08b488, ffff88800e08b530) [ 23.995602] [ 23.995823] The buggy address belongs to the physical page: [ 23.996486] page:000000005860032d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08b [ 23.997573] memcg:ffff88800ed9b301 [ 23.997998] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.998638] page_type: 0xffffffff() [ 23.999090] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.000019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9b301 [ 24.000936] page dumped because: kasan: bad access detected [ 24.001631] [ 24.001848] Memory state around the buggy address: [ 24.002462] ffff88800e08b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.003369] ffff88800e08b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.004288] >ffff88800e08b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.005186] ^ [ 24.005978] ffff88800e08b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.006866] ffff88800e08b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.007772] ================================================================== [ 24.009180] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.163693] BUG: Bad rss-counter state mm:000000004a9c87f4 type:MM_FILEPAGES val:33 [ 26.164709] BUG: Bad rss-counter state mm:000000004a9c87f4 type:MM_ANONPAGES val:22 [ 26.652012] BUG: Bad rss-counter state mm:0000000090c2d876 type:MM_FILEPAGES val:33 [ 26.653151] BUG: Bad rss-counter state mm:0000000090c2d876 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32209' (ECDSA) to the list of known hosts. 2023/06/21 04:44:58 fuzzer started 2023/06/21 04:44:58 dialing manager at localhost:36067 2023/06/21 04:44:58 checking machine... 2023/06/21 04:44:58 checking revisions... [ 27.400205] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:44:59 testing simple program... [ 27.460184] cgroup: Unknown subsys name 'net' [ 27.625311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:58 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880102fff01 RSI=ffff8880102fff18 RDI=ffff8880102fff18 RBP=ffff8880102ff980 RSP=ffff8880102ff8b8 R8 =ffffffff863b3570 R9 =ffff8880102ff968 R10=0000000000038001 R11=000000000008a95e R12=ffff8880102ff988 R13=ffff8880102ff970 R14=ffff8880102fff20 R15=ffff8880102ff928 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f31ef405900 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=00007ffdecd88000 CR3=0000000019f70000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007f897188a850 CR3=000000000d65e000 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=50fb20c7d6a606ad9a4656bf967cb880 XMM02=2c67c8bc2e329bc3000000000011d498 XMM03=fb795ef6d65770560000000000121140 XMM04=fd712ca7d6432f7f00000000000ae988 XMM05=d923e04fbd203a180000000000132ad8 XMM06=4fda316b135da52b0000000000131e90 XMM07=e042d86d42eb936e0000000000121418 XMM08=cff4b6ab0cec15d8000000000011d4f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000