[ 30.788257] BUG: Bad rss-counter state mm:0000000014aba480 type:MM_FILEPAGES val:33 [ 30.789248] BUG: Bad rss-counter state mm:0000000014aba480 type:MM_ANONPAGES val:22 [ 30.953201] ================================================================== [ 30.954128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.955081] Read of size 8 at addr ffff88800d8b4798 by task sshd/219 [ 30.955866] [ 30.956214] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.957106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.958089] Call Trace: [ 30.958434] [ 30.958718] dump_stack_lvl+0x91/0xf0 [ 30.959222] print_report+0xcc/0x620 [ 30.959715] ? __virt_addr_valid+0x102/0x340 [ 30.960273] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.960906] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961557] kasan_report+0xbe/0xf0 [ 30.962040] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.962669] vma_interval_tree_remove+0xc75/0xec0 [ 30.963278] vma_prepare+0xc54/0x11a0 [ 30.963768] __split_vma+0x5af/0x950 [ 30.964247] ? __pfx___split_vma+0x10/0x10 [ 30.964786] ? find_held_lock+0x2c/0x110 [ 30.965306] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.965879] ? lock_is_held_type+0x9f/0x120 [ 30.966420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.967030] ? mtree_range_walk+0x632/0x900 [ 30.967584] ? mas_walk+0x5c7/0x7c0 [ 30.968063] do_vmi_munmap+0x1f1/0x2b0 [ 30.968556] mmap_region+0x1f9/0x2660 [ 30.969076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.969586] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.970307] ? __pfx_lock_acquire+0x10/0x10 [ 30.970840] ? __pfx_mmap_region+0x10/0x10 [ 30.971376] ? security_mmap_addr+0x7d/0xa0 [ 30.971903] ? get_unmapped_area+0x1f5/0x3f0 [ 30.972459] do_mmap+0x854/0xf00 [ 30.972914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.973418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.973992] ksys_mmap_pgoff+0x3af/0x500 [ 30.974493] do_syscall_64+0x3f/0x90 [ 30.974977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975622] RIP: 0033:0x7feaa2368d82 [ 30.976078] 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 [ 30.978241] RSP: 002b:00007ffeeff310b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.979153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feaa2368d82 [ 30.979996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feaa17a2000 [ 30.980852] RBP: 00007feaa17a2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.981708] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f8e0c1d90 [ 30.982557] R13: 00007ffeeff310d0 R14: 00007ffeeff31100 R15: 00007ffeeff31460 [ 30.983415] [ 30.983714] [ 30.983933] Allocated by task 212: [ 30.984369] kasan_save_stack+0x22/0x50 [ 30.984889] kasan_set_track+0x25/0x30 [ 30.985383] __kasan_slab_alloc+0x59/0x70 [ 30.985906] kmem_cache_alloc+0x16b/0x370 [ 30.986424] vm_area_dup+0x20/0x160 [ 30.986878] __split_vma+0x170/0x950 [ 30.987342] split_vma+0xc6/0x110 [ 30.987785] mprotect_fixup+0x8d2/0xb30 [ 30.988295] do_mprotect_pkey+0x87e/0xd40 [ 30.988829] __x64_sys_mprotect+0x78/0xc0 [ 30.989358] do_syscall_64+0x3f/0x90 [ 30.989834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990485] [ 30.990701] Freed by task 212: [ 30.991100] kasan_save_stack+0x22/0x50 [ 30.991603] kasan_set_track+0x25/0x30 [ 30.992100] kasan_save_free_info+0x2b/0x50 [ 30.992627] __kasan_slab_free+0x10a/0x190 [ 30.993164] kmem_cache_free+0x10d/0x4d0 [ 30.993666] rcu_core+0x8c8/0x2860 [ 30.994105] __do_softirq+0x1b7/0x7d4 [ 30.994581] [ 30.994801] Last potentially related work creation: [ 30.995382] kasan_save_stack+0x22/0x50 [ 30.995890] __kasan_record_aux_stack+0x8e/0xa0 [ 30.996465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.997131] remove_vma+0x139/0x170 [ 30.997582] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.998147] do_vmi_munmap+0x1f1/0x2b0 [ 30.998636] __vm_munmap+0x138/0x3a0 [ 30.999113] __x64_sys_munmap+0x59/0x80 [ 30.999608] do_syscall_64+0x3f/0x90 [ 31.000084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.000722] [ 31.000946] The buggy address belongs to the object at ffff88800d8b4740 [ 31.000946] which belongs to the cache vm_area_struct of size 168 [ 31.002420] The buggy address is located 88 bytes inside of [ 31.002420] freed 168-byte region [ffff88800d8b4740, ffff88800d8b47e8) [ 31.003819] [ 31.004036] The buggy address belongs to the physical page: [ 31.004693] page:000000005f4b9629 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8b4 [ 31.005806] memcg:ffff88800d8c9201 [ 31.006232] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.006885] page_type: 0xffffffff() [ 31.007341] raw: 0100000000000200 ffff8880087a0c80 ffffea0000357240 dead000000000002 [ 31.008273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8c9201 [ 31.009192] page dumped because: kasan: bad access detected [ 31.009857] [ 31.010071] Memory state around the buggy address: [ 31.010648] ffff88800d8b4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.011499] ffff88800d8b4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.012371] >ffff88800d8b4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.013239] ^ [ 31.013728] ffff88800d8b4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.014587] ffff88800d8b4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.015447] ================================================================== [ 31.016533] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.961119] BUG: Bad rss-counter state mm:00000000efc19953 type:MM_FILEPAGES val:33 [ 32.962745] BUG: Bad rss-counter state mm:00000000efc19953 type:MM_ANONPAGES val:22 [ 33.457768] BUG: Bad rss-counter state mm:00000000c03da527 type:MM_FILEPAGES val:33 [ 33.458816] BUG: Bad rss-counter state mm:00000000c03da527 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38745' (ECDSA) to the list of known hosts. 2023/06/21 06:30:43 fuzzer started 2023/06/21 06:30:43 dialing manager at localhost:36067 2023/06/21 06:30:43 checking machine... 2023/06/21 06:30:43 checking revisions... [ 34.159933] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:30:43 testing simple program... [ 34.213273] cgroup: Unknown subsys name 'net' [ 34.303218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:30:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fad123fb250 CR3=000000000cb46000 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=e61d425d26e605b83346d34b33db9e4f XMM02=000000000011dc00ec2efd57dc4c00df XMM03=0000000000123aa81b53fea8ffa6c9d4 XMM04=ca9dae8847342f7000000000000ae988 XMM05=c78c3695be88297d00000000001336a0 XMM06=806171799158d9670000000000132d28 XMM07=e042d86d42eb936e0000000000123d80 XMM08=1b53fea8ffa6c9d4000000000011dc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffff110027ff67a RDX=1ffff110027ff686 RSI=0000000000000004 RDI=ffff888013ffb430 RBP=0000000000000078 RSP=ffff8880147c7ca8 R8 =0000000000000001 R9 =ffffed10027ff684 R10=ffff888013ffb423 R11=00000000000b6a61 R12=ffff8880195bb398 R13=0000000000000000 R14=ffff888013ffb3d8 R15=ffff888013ffb390 RIP=ffffffff81847410 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 00007fba8e70a900 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=00007fff2d426000 CR3=00000000197ec000 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