[ 38.393587] BUG: Bad rss-counter state mm:00000000c0675ee0 type:MM_FILEPAGES val:33 [ 38.394592] BUG: Bad rss-counter state mm:00000000c0675ee0 type:MM_ANONPAGES val:22 [ 38.554902] ================================================================== [ 38.555821] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.556771] Read of size 8 at addr ffff88800fdf3968 by task sshd/219 [ 38.557649] [ 38.557882] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.558751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.559727] Call Trace: [ 38.560049] [ 38.560339] dump_stack_lvl+0x91/0xf0 [ 38.560833] print_report+0xcc/0x620 [ 38.561317] ? __virt_addr_valid+0x102/0x340 [ 38.561895] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.562512] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.563131] kasan_report+0xbe/0xf0 [ 38.563611] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.564233] vma_interval_tree_remove+0xc75/0xec0 [ 38.564845] vma_prepare+0xc54/0x11a0 [ 38.565323] __split_vma+0x5af/0x950 [ 38.565809] ? __pfx___split_vma+0x10/0x10 [ 38.566345] ? find_held_lock+0x2c/0x110 [ 38.566876] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.567458] ? lock_is_held_type+0x9f/0x120 [ 38.568013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.568633] ? mtree_range_walk+0x632/0x900 [ 38.569206] ? mas_walk+0x5c7/0x7c0 [ 38.569724] do_vmi_munmap+0x1f1/0x2b0 [ 38.570237] mmap_region+0x1f9/0x2660 [ 38.570738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.571262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.571996] ? __pfx_lock_acquire+0x10/0x10 [ 38.572532] ? __pfx_mmap_region+0x10/0x10 [ 38.573071] ? security_mmap_addr+0x7d/0xa0 [ 38.573635] ? get_unmapped_area+0x1f5/0x3f0 [ 38.574195] do_mmap+0x854/0xf00 [ 38.574637] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.575139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.575708] ksys_mmap_pgoff+0x3af/0x500 [ 38.576232] do_syscall_64+0x3f/0x90 [ 38.576723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.577369] RIP: 0033:0x7f29f51b1d82 [ 38.577869] 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 [ 38.580020] RSP: 002b:00007ffe5dbde728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.580964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29f51b1d82 [ 38.581840] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29f45eb000 [ 38.582695] RBP: 00007f29f45eb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.583553] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650ce0baec0 [ 38.584408] R13: 00007ffe5dbde740 R14: 00007ffe5dbde770 R15: 00007ffe5dbdead0 [ 38.585270] [ 38.585569] [ 38.585786] Allocated by task 211: [ 38.586215] kasan_save_stack+0x22/0x50 [ 38.586728] kasan_set_track+0x25/0x30 [ 38.587232] __kasan_slab_alloc+0x59/0x70 [ 38.587764] kmem_cache_alloc+0x16b/0x370 [ 38.588292] vm_area_dup+0x20/0x160 [ 38.588753] __split_vma+0x170/0x950 [ 38.589225] split_vma+0xc6/0x110 [ 38.589695] mprotect_fixup+0x8d2/0xb30 [ 38.590196] do_mprotect_pkey+0x87e/0xd40 [ 38.590729] __x64_sys_mprotect+0x78/0xc0 [ 38.591258] do_syscall_64+0x3f/0x90 [ 38.591736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.592389] [ 38.592619] Freed by task 202: [ 38.593018] kasan_save_stack+0x22/0x50 [ 38.593550] kasan_set_track+0x25/0x30 [ 38.594053] kasan_save_free_info+0x2b/0x50 [ 38.594589] __kasan_slab_free+0x10a/0x190 [ 38.595124] kmem_cache_free+0x10d/0x4d0 [ 38.595657] rcu_core+0x8c8/0x2860 [ 38.596106] __do_softirq+0x1b7/0x7d4 [ 38.596602] [ 38.596823] Last potentially related work creation: [ 38.597418] kasan_save_stack+0x22/0x50 [ 38.597931] __kasan_record_aux_stack+0x8e/0xa0 [ 38.598519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.599179] remove_vma+0x139/0x170 [ 38.599644] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.600210] do_vmi_munmap+0x1f1/0x2b0 [ 38.600699] __vm_munmap+0x138/0x3a0 [ 38.601181] __x64_sys_munmap+0x59/0x80 [ 38.601695] do_syscall_64+0x3f/0x90 [ 38.602176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.602827] [ 38.603046] The buggy address belongs to the object at ffff88800fdf3910 [ 38.603046] which belongs to the cache vm_area_struct of size 168 [ 38.604564] The buggy address is located 88 bytes inside of [ 38.604564] freed 168-byte region [ffff88800fdf3910, ffff88800fdf39b8) [ 38.606022] [ 38.606241] The buggy address belongs to the physical page: [ 38.606910] page:000000003eae89aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf3 [ 38.608020] memcg:ffff88800f040c01 [ 38.608458] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.609118] page_type: 0xffffffff() [ 38.609583] raw: 0100000000000200 ffff88800879fc80 ffffea0000382e80 0000000000000002 [ 38.610530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f040c01 [ 38.611459] page dumped because: kasan: bad access detected [ 38.612138] [ 38.612355] Memory state around the buggy address: [ 38.612948] ffff88800fdf3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.613836] ffff88800fdf3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.614713] >ffff88800fdf3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.615577] ^ [ 38.616384] ffff88800fdf3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.617258] ffff88800fdf3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.618137] ================================================================== [ 38.619264] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.432222] BUG: Bad rss-counter state mm:00000000203a92d7 type:MM_FILEPAGES val:33 [ 41.433388] BUG: Bad rss-counter state mm:00000000203a92d7 type:MM_ANONPAGES val:22 [ 41.804701] BUG: Bad rss-counter state mm:00000000d487cc89 type:MM_FILEPAGES val:33 [ 41.805851] BUG: Bad rss-counter state mm:00000000d487cc89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37010' (ECDSA) to the list of known hosts. 2023/06/19 17:16:13 fuzzer started 2023/06/19 17:16:13 dialing manager at localhost:44161 2023/06/19 17:16:13 checking machine... 2023/06/19 17:16:13 checking revisions... [ 42.509572] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:16:14 testing simple program... [ 42.545928] cgroup: Unknown subsys name 'net' [ 42.579439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:16:05 Registers: info registers vcpu 0 RAX=ffffea00005bc100 RBX=ffff888016f04720 RCX=ffff88800844f780 RDX=ffff888096f04720 RSI=ffff88800949fbe0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888019d97c28 R8 =ffff888016f04720 R9 =0000000000000000 R10=ffffea00002527c0 R11=00000000800d0007 R12=dffffc0000000000 R13=ffff888019d97c68 R14=0000000000000000 R15=ffff88800949fbe0 RIP=ffffffff81810213 RFL=00000286 [--S--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 00007f9a368d6900 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=00007f9a36e8e0b0 CR3=000000000f61c000 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=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=00007f694b06c670 CR3=000000000e064000 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=2033313a36313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000