[ 24.935394] BUG: Bad rss-counter state mm:000000007ff9002b type:MM_FILEPAGES val:33 [ 24.936598] BUG: Bad rss-counter state mm:000000007ff9002b type:MM_ANONPAGES val:22 [ 24.973891] ================================================================== [ 24.974787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.975745] Read of size 8 at addr ffff88800dd0a798 by task sshd/218 [ 24.976513] [ 24.976732] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.977604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.978604] Call Trace: [ 24.978930] [ 24.979218] dump_stack_lvl+0x91/0xf0 [ 24.979735] print_report+0xcc/0x620 [ 24.980223] ? __virt_addr_valid+0x102/0x340 [ 24.980784] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.981407] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.982125] kasan_report+0xbe/0xf0 [ 24.982691] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.983446] vma_interval_tree_remove+0xc75/0xec0 [ 24.984197] vma_prepare+0xc54/0x11a0 [ 24.984782] __split_vma+0x5af/0x950 [ 24.985361] ? __pfx___split_vma+0x10/0x10 [ 24.986008] ? find_held_lock+0x2c/0x110 [ 24.986640] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.987328] ? lock_is_held_type+0x9f/0x120 [ 24.988010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.988763] ? mtree_range_walk+0x632/0x900 [ 24.989432] ? mas_walk+0x5c7/0x7c0 [ 24.990009] do_vmi_munmap+0x1f1/0x2b0 [ 24.990607] mmap_region+0x1f9/0x2660 [ 24.991193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.991824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.992699] ? __pfx_lock_acquire+0x10/0x10 [ 24.993344] ? __pfx_mmap_region+0x10/0x10 [ 24.993993] ? security_mmap_addr+0x7d/0xa0 [ 24.994642] ? get_unmapped_area+0x1f5/0x3f0 [ 24.995318] do_mmap+0x854/0xf00 [ 24.995857] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.996455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.997135] ksys_mmap_pgoff+0x3af/0x500 [ 24.997744] do_syscall_64+0x3f/0x90 [ 24.998323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.999045] RIP: 0033:0x7fa801b8dd82 [ 24.999479] 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 [ 25.001620] RSP: 002b:00007fffa87620b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.002477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa801b8dd82 [ 25.003281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa800fc7000 [ 25.004091] RBP: 00007fa800fc7000 R08: 0000000000000009 R09: 0000000000001000 [ 25.004882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbad09cf70 [ 25.005676] R13: 00007fffa87620d0 R14: 00007fffa8762100 R15: 00007fffa8762460 [ 25.006477] [ 25.006754] [ 25.006956] Allocated by task 210: [ 25.007358] kasan_save_stack+0x22/0x50 [ 25.007846] kasan_set_track+0x25/0x30 [ 25.008310] __kasan_slab_alloc+0x59/0x70 [ 25.008807] kmem_cache_alloc+0x16b/0x370 [ 25.009312] vm_area_dup+0x20/0x160 [ 25.009755] __split_vma+0x170/0x950 [ 25.010203] split_vma+0xc6/0x110 [ 25.010631] mprotect_fixup+0x8d2/0xb30 [ 25.011116] do_mprotect_pkey+0x87e/0xd40 [ 25.011639] __x64_sys_mprotect+0x78/0xc0 [ 25.012147] do_syscall_64+0x3f/0x90 [ 25.012616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.013238] [ 25.013448] Freed by task 210: [ 25.013829] kasan_save_stack+0x22/0x50 [ 25.014317] kasan_set_track+0x25/0x30 [ 25.014797] kasan_save_free_info+0x2b/0x50 [ 25.015320] __kasan_slab_free+0x10a/0x190 [ 25.015855] kmem_cache_free+0x10d/0x4d0 [ 25.016356] rcu_core+0x8c8/0x2860 [ 25.016794] __do_softirq+0x1b7/0x7d4 [ 25.017255] [ 25.017462] Last potentially related work creation: [ 25.018049] kasan_save_stack+0x22/0x50 [ 25.018564] __kasan_record_aux_stack+0x8e/0xa0 [ 25.019145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.019850] remove_vma+0x139/0x170 [ 25.020327] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.020899] do_vmi_munmap+0x1f1/0x2b0 [ 25.021402] __vm_munmap+0x138/0x3a0 [ 25.021880] __x64_sys_munmap+0x59/0x80 [ 25.022387] do_syscall_64+0x3f/0x90 [ 25.022876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.023546] [ 25.023787] The buggy address belongs to the object at ffff88800dd0a740 [ 25.023787] which belongs to the cache vm_area_struct of size 168 [ 25.025277] The buggy address is located 88 bytes inside of [ 25.025277] freed 168-byte region [ffff88800dd0a740, ffff88800dd0a7e8) [ 25.026730] [ 25.026953] The buggy address belongs to the physical page: [ 25.027651] page:00000000ed88f905 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd0a [ 25.028769] memcg:ffff88800defb101 [ 25.029196] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.029861] page_type: 0xffffffff() [ 25.030315] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 25.031238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800defb101 [ 25.032199] page dumped because: kasan: bad access detected [ 25.032868] [ 25.033089] Memory state around the buggy address: [ 25.033689] ffff88800dd0a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.034552] ffff88800dd0a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.035414] >ffff88800dd0a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.036286] ^ [ 25.036791] ffff88800dd0a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.037642] ffff88800dd0a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.038494] ================================================================== [ 25.039642] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.859998] BUG: Bad rss-counter state mm:0000000093262de9 type:MM_FILEPAGES val:33 [ 26.860994] BUG: Bad rss-counter state mm:0000000093262de9 type:MM_ANONPAGES val:22 [ 27.306761] BUG: Bad rss-counter state mm:00000000b9dabd60 type:MM_FILEPAGES val:33 [ 27.307917] BUG: Bad rss-counter state mm:00000000b9dabd60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23530' (ECDSA) to the list of known hosts. 2023/06/20 02:32:08 fuzzer started 2023/06/20 02:32:08 dialing manager at localhost:44161 2023/06/20 02:32:08 checking machine... 2023/06/20 02:32:08 checking revisions... [ 28.012574] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:32:08 testing simple program... [ 28.063796] cgroup: Unknown subsys name 'net' [ 28.111987] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:32:07 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f0 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1e8 RSP=ffff88801673f7c0 R8 =ffffffff860d68c0 R9 =ffff88801673f8b8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1e4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f0f28c3a900 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=00007f0f291f1618 CR3=0000000018cec000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f0f291ef650 CR3=000000000d9c8000 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=2037303a32333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a32333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000