[ 31.676713] BUG: Bad rss-counter state mm:00000000e9529e3c type:MM_FILEPAGES val:33 [ 31.677723] BUG: Bad rss-counter state mm:00000000e9529e3c type:MM_ANONPAGES val:22 [ 31.817243] ================================================================== [ 31.818187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.819112] Read of size 8 at addr ffff888018d606b0 by task sshd/225 [ 31.819866] [ 31.820080] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.821019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.821990] Call Trace: [ 31.822305] [ 31.822597] dump_stack_lvl+0x91/0xf0 [ 31.823085] print_report+0xcc/0x620 [ 31.823561] ? __virt_addr_valid+0x102/0x340 [ 31.824105] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.824719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.825330] kasan_report+0xbe/0xf0 [ 31.825798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.826443] vma_interval_tree_remove+0xc75/0xec0 [ 31.827043] vma_prepare+0xc54/0x11a0 [ 31.827512] __split_vma+0x5af/0x950 [ 31.827986] ? __pfx___split_vma+0x10/0x10 [ 31.828504] ? find_held_lock+0x2c/0x110 [ 31.829019] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.829577] ? lock_is_held_type+0x9f/0x120 [ 31.830126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.830732] ? mtree_range_walk+0x632/0x900 [ 31.831282] ? mas_walk+0x5c7/0x7c0 [ 31.831754] do_vmi_munmap+0x1f1/0x2b0 [ 31.832237] mmap_region+0x1f9/0x2660 [ 31.832711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.833213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.833952] ? __pfx_lock_acquire+0x10/0x10 [ 31.834476] ? __pfx_mmap_region+0x10/0x10 [ 31.835001] ? security_mmap_addr+0x7d/0xa0 [ 31.835520] ? get_unmapped_area+0x1f5/0x3f0 [ 31.836064] do_mmap+0x854/0xf00 [ 31.836504] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.836998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.837564] ksys_mmap_pgoff+0x3af/0x500 [ 31.838087] do_syscall_64+0x3f/0x90 [ 31.838565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.839210] RIP: 0033:0x7f702fab0d82 [ 31.839670] 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 [ 31.841773] RSP: 002b:00007ffea8b6d028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.842677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f702fab0d82 [ 31.843503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f702eeea000 [ 31.844327] RBP: 00007f702eeea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.845173] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555860315f70 [ 31.846018] R13: 00007ffea8b6d040 R14: 00007ffea8b6d070 R15: 00007ffea8b6d3d0 [ 31.846871] [ 31.847168] [ 31.847380] Allocated by task 212: [ 31.847802] kasan_save_stack+0x22/0x50 [ 31.848304] kasan_set_track+0x25/0x30 [ 31.848795] __kasan_slab_alloc+0x59/0x70 [ 31.849307] kmem_cache_alloc+0x16b/0x370 [ 31.849812] vm_area_dup+0x20/0x160 [ 31.850291] __split_vma+0x170/0x950 [ 31.850751] split_vma+0xc6/0x110 [ 31.851183] mprotect_fixup+0x8d2/0xb30 [ 31.851679] do_mprotect_pkey+0x87e/0xd40 [ 31.852198] __x64_sys_mprotect+0x78/0xc0 [ 31.852712] do_syscall_64+0x3f/0x90 [ 31.853179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.853824] [ 31.854049] Freed by task 212: [ 31.854441] kasan_save_stack+0x22/0x50 [ 31.854949] kasan_set_track+0x25/0x30 [ 31.855439] kasan_save_free_info+0x2b/0x50 [ 31.855960] __kasan_slab_free+0x10a/0x190 [ 31.856486] kmem_cache_free+0x10d/0x4d0 [ 31.856997] rcu_core+0x8c8/0x2860 [ 31.857432] __do_softirq+0x1b7/0x7d4 [ 31.857919] [ 31.858130] Last potentially related work creation: [ 31.858709] kasan_save_stack+0x22/0x50 [ 31.859209] __kasan_record_aux_stack+0x8e/0xa0 [ 31.859780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.860418] remove_vma+0x139/0x170 [ 31.860861] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.861506] do_vmi_munmap+0x1f1/0x2b0 [ 31.861997] __vm_munmap+0x138/0x3a0 [ 31.862454] __x64_sys_munmap+0x59/0x80 [ 31.862941] do_syscall_64+0x3f/0x90 [ 31.863406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.864057] [ 31.864268] The buggy address belongs to the object at ffff888018d60658 [ 31.864268] which belongs to the cache vm_area_struct of size 168 [ 31.865712] The buggy address is located 88 bytes inside of [ 31.865712] freed 168-byte region [ffff888018d60658, ffff888018d60700) [ 31.867101] [ 31.867312] The buggy address belongs to the physical page: [ 31.867957] page:00000000549140f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d60 [ 31.869028] memcg:ffff888018defc01 [ 31.869446] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.870103] page_type: 0xffffffff() [ 31.870548] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7940 dead000000000002 [ 31.871455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018defc01 [ 31.872343] page dumped because: kasan: bad access detected [ 31.873007] [ 31.873221] Memory state around the buggy address: [ 31.873851] ffff888018d60580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.874756] ffff888018d60600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.875673] >ffff888018d60680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.876578] ^ [ 31.877197] ffff888018d60700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.878115] ffff888018d60780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.879030] ================================================================== [ 31.880012] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.868101] BUG: Bad rss-counter state mm:00000000d1d97baf type:MM_FILEPAGES val:33 [ 33.869273] BUG: Bad rss-counter state mm:00000000d1d97baf type:MM_ANONPAGES val:22 [ 34.269710] BUG: Bad rss-counter state mm:00000000655bdbe4 type:MM_FILEPAGES val:33 [ 34.270933] BUG: Bad rss-counter state mm:00000000655bdbe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46626' (ECDSA) to the list of known hosts. 2023/06/21 01:16:30 fuzzer started 2023/06/21 01:16:30 dialing manager at localhost:36067 2023/06/21 01:16:30 checking machine... 2023/06/21 01:16:30 checking revisions... [ 34.982778] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:16:31 testing simple program... [ 35.039371] cgroup: Unknown subsys name 'net' [ 35.082611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:16:30 Registers: info registers vcpu 0 RAX=ffffea00005a8280 RBX=ffff888016a0a720 RCX=ffff88800844f780 RDX=ffff888096a0a720 RSI=ffff88801a00f720 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888016697a38 R8 =ffff888016a0a720 R9 =0000000000000000 R10=ffffea00006803c0 R11=00000000800d000b R12=dffffc0000000000 R13=ffff888016697a78 R14=0000000000000000 R15=ffff88801a00f720 RIP=ffffffff81810393 RFL=00000282 [--S----] 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 00007f25f68ed900 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=00007ffeb28f3000 CR3=000000000e698000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=00007f206ff86028 CR3=000000000d6a4000 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=43b53aed3bbe1b86c84a81fc931ae378 XMM02=000000000011b020eff9b2d0a8fce9cb XMM03=000000000011b0f02c67c8bc2e329bc3 XMM04=78d5e8ef571a488100000000000ae988 XMM05=e7a3b750822471340000000000131638 XMM06=ae9b264101391a5b00000000001314c0 XMM07=e042d86d42eb936e0000000000121d08 XMM08=839a52a4af0af1ff000000000011b0f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000