[ 60.840722] BUG: Bad rss-counter state mm:000000003e2fd048 type:MM_FILEPAGES val:33 [ 60.841862] BUG: Bad rss-counter state mm:000000003e2fd048 type:MM_ANONPAGES val:22 [ 60.947431] ================================================================== [ 60.947945] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.948481] Read of size 8 at addr ffff88800b93c5c8 by task sshd/227 [ 60.948906] [ 60.949031] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.949519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.950060] Call Trace: [ 60.950241] [ 60.950406] dump_stack_lvl+0x91/0xf0 [ 60.950682] print_report+0xcc/0x620 [ 60.950950] ? __virt_addr_valid+0x102/0x340 [ 60.951258] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.951602] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.951947] kasan_report+0xbe/0xf0 [ 60.952229] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.952768] vma_interval_tree_remove+0xc75/0xec0 [ 60.953107] vma_prepare+0xc54/0x11a0 [ 60.953370] __split_vma+0x5af/0x950 [ 60.953634] ? __pfx___split_vma+0x10/0x10 [ 60.953925] ? find_held_lock+0x2c/0x110 [ 60.954215] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.954525] ? lock_is_held_type+0x9f/0x120 [ 60.954831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.955170] ? mtree_range_walk+0x632/0x900 [ 60.955475] ? mas_walk+0x5c7/0x7c0 [ 60.955736] do_vmi_munmap+0x1f1/0x2b0 [ 60.956008] mmap_region+0x1f9/0x2660 [ 60.956283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.956598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.957028] ? __pfx_lock_acquire+0x10/0x10 [ 60.957349] ? __pfx_mmap_region+0x10/0x10 [ 60.957666] ? security_mmap_addr+0x7d/0xa0 [ 60.957982] ? get_unmapped_area+0x1f5/0x3f0 [ 60.958306] do_mmap+0x854/0xf00 [ 60.958559] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.958848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.959177] ksys_mmap_pgoff+0x3af/0x500 [ 60.959471] do_syscall_64+0x3f/0x90 [ 60.959755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.960139] RIP: 0033:0x7f8c234a8d82 [ 60.960417] 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 [ 60.961719] RSP: 002b:00007fff6c191c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.962273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c234a8d82 [ 60.962782] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c228e2000 [ 60.963286] RBP: 00007f8c228e2000 R08: 0000000000000009 R09: 0000000000001000 [ 60.963798] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1d28d9ec0 [ 60.964317] R13: 00007fff6c191cb0 R14: 00007fff6c191ce0 R15: 00007fff6c192040 [ 60.964832] [ 60.965007] [ 60.965133] Allocated by task 208: [ 60.965392] kasan_save_stack+0x22/0x50 [ 60.965694] kasan_set_track+0x25/0x30 [ 60.965985] __kasan_slab_alloc+0x59/0x70 [ 60.966294] kmem_cache_alloc+0x16b/0x370 [ 60.966595] vm_area_dup+0x20/0x160 [ 60.966869] __split_vma+0x170/0x950 [ 60.967151] split_vma+0xc6/0x110 [ 60.967410] mprotect_fixup+0x8d2/0xb30 [ 60.967710] do_mprotect_pkey+0x87e/0xd40 [ 60.968014] __x64_sys_mprotect+0x78/0xc0 [ 60.968330] do_syscall_64+0x3f/0x90 [ 60.968611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.968985] [ 60.969111] Freed by task 204: [ 60.969346] kasan_save_stack+0x22/0x50 [ 60.969641] kasan_set_track+0x25/0x30 [ 60.969933] kasan_save_free_info+0x2b/0x50 [ 60.970254] __kasan_slab_free+0x10a/0x190 [ 60.970559] kmem_cache_free+0x10d/0x4d0 [ 60.970860] rcu_core+0x8c8/0x2860 [ 60.971127] __do_softirq+0x1b7/0x7d4 [ 60.971412] [ 60.971540] Last potentially related work creation: [ 60.971878] kasan_save_stack+0x22/0x50 [ 60.972188] __kasan_record_aux_stack+0x8e/0xa0 [ 60.972527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.972898] remove_vma+0x139/0x170 [ 60.973171] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.973509] do_vmi_munmap+0x1f1/0x2b0 [ 60.973799] __vm_munmap+0x138/0x3a0 [ 60.974077] __x64_sys_munmap+0x59/0x80 [ 60.974371] do_syscall_64+0x3f/0x90 [ 60.974654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.975031] [ 60.975160] Second to last potentially related work creation: [ 60.975573] kasan_save_stack+0x22/0x50 [ 60.975867] __kasan_record_aux_stack+0x8e/0xa0 [ 60.976212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.976596] remove_vma+0x139/0x170 [ 60.976867] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.977193] do_vmi_munmap+0x1f1/0x2b0 [ 60.977481] mmap_region+0x1f9/0x2660 [ 60.977760] do_mmap+0x854/0xf00 [ 60.978010] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.978300] ksys_mmap_pgoff+0x3af/0x500 [ 60.978596] do_syscall_64+0x3f/0x90 [ 60.978870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.979251] [ 60.979382] The buggy address belongs to the object at ffff88800b93c570 [ 60.979382] which belongs to the cache vm_area_struct of size 168 [ 60.980274] The buggy address is located 88 bytes inside of [ 60.980274] freed 168-byte region [ffff88800b93c570, ffff88800b93c618) [ 60.981107] [ 60.981234] The buggy address belongs to the physical page: [ 60.981626] page:00000000e89beac6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb93c [ 60.982282] memcg:ffff88800e991101 [ 60.982539] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.982928] page_type: 0xffffffff() [ 60.983195] raw: 0100000000000200 ffff88800879fc80 ffffea0000372500 dead000000000002 [ 60.983754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e991101 [ 60.984311] page dumped because: kasan: bad access detected [ 60.984708] [ 60.984835] Memory state around the buggy address: [ 60.985182] ffff88800b93c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.985697] ffff88800b93c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.986216] >ffff88800b93c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.986740] ^ [ 60.987134] ffff88800b93c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 60.987658] ffff88800b93c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.988169] ================================================================== [ 60.988765] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.813629] BUG: Bad rss-counter state mm:00000000661bae1d type:MM_FILEPAGES val:33 [ 62.814399] BUG: Bad rss-counter state mm:00000000661bae1d type:MM_ANONPAGES val:22 [ 63.280407] BUG: Bad rss-counter state mm:00000000d4cb2294 type:MM_FILEPAGES val:33 [ 63.281802] BUG: Bad rss-counter state mm:00000000d4cb2294 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36009' (ECDSA) to the list of known hosts. 2023/06/19 22:28:41 fuzzer started 2023/06/19 22:28:41 dialing manager at localhost:44161 2023/06/19 22:28:41 checking machine... 2023/06/19 22:28:41 checking revisions... [ 63.960689] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:28:42 testing simple program... [ 64.005921] cgroup: Unknown subsys name 'net' [ 64.056559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c6af490 RCX=ffffffff860d6801 RDX=1ffff110018d5e9d RSI=0000000000000000 RDI=ffff88800c6af490 RBP=ffff88800c6af4e8 RSP=ffff88800c6af478 R8 =ffffffff860d68fa R9 =ffff88800c6af4d0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800c6af558 R13=0000000000000000 R14=ffff88800cbe0000 R15=ffff88801bb6b980 RIP=ffffffff8113038e 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 00007f11d0743900 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=00007f11d0cfa618 CR3=000000000fd38000 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=1ffffffff0bb1ab1 RBX=ffffffff85d8d58c RCX=ffffffff8110261e RDX=0000000000000000 RSI=ffffffff86090648 RDI=ffffffff85d8d57c RBP=ffffffff85d8d57c RSP=ffff88806cf099e0 R8 =ffffffff86090648 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffffffff85d8d5a0 R13=ffffffff85d8d57c R14=ffffffff85d8d57c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 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=00007f2434359520 CR3=000000000d830000 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=7cb5e53f38b731b1ff4d4cd1ecab38a3 XMM02=000000000011c478eff9b2d0a8fce9cb XMM03=000000000011c5482c67c8bc2e329bc3 XMM04=1c12a3c5a993b6ce00000000000ae988 XMM05=1a58cb52dc18f6d70000000000134218 XMM06=94aac670ef06ff6500000000001340a0 XMM07=e042d86d42eb936e0000000000123848 XMM08=77c1ca0863e2b9c8000000000011c548 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000