syzkaller login: [ 38.828601] BUG: Bad rss-counter state mm:00000000a3f3c6fc type:MM_FILEPAGES val:33 [ 38.829973] BUG: Bad rss-counter state mm:00000000a3f3c6fc type:MM_ANONPAGES val:22 [ 38.995189] ================================================================== [ 38.996114] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.997115] Read of size 8 at addr ffff888019cc7c20 by task sshd/226 [ 38.997916] [ 38.998297] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.999190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.000202] Call Trace: [ 39.000545] [ 39.000861] dump_stack_lvl+0x91/0xf0 [ 39.001368] print_report+0xcc/0x620 [ 39.001860] ? __virt_addr_valid+0x102/0x340 [ 39.002429] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.003106] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.003763] kasan_report+0xbe/0xf0 [ 39.004241] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.004906] vma_interval_tree_remove+0xc75/0xec0 [ 39.005525] vma_prepare+0xc54/0x11a0 [ 39.006017] __split_vma+0x5af/0x950 [ 39.006499] ? __pfx___split_vma+0x10/0x10 [ 39.007056] ? find_held_lock+0x2c/0x110 [ 39.007595] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.008160] ? lock_is_held_type+0x9f/0x120 [ 39.008724] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.009332] ? mtree_range_walk+0x632/0x900 [ 39.009880] ? mas_walk+0x5c7/0x7c0 [ 39.010351] do_vmi_munmap+0x1f1/0x2b0 [ 39.010866] mmap_region+0x1f9/0x2660 [ 39.011351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.011857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.012568] ? __pfx_lock_acquire+0x10/0x10 [ 39.013107] ? __pfx_mmap_region+0x10/0x10 [ 39.013638] ? security_mmap_addr+0x7d/0xa0 [ 39.014177] ? get_unmapped_area+0x1f5/0x3f0 [ 39.014734] do_mmap+0x854/0xf00 [ 39.015179] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.015724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.016283] ksys_mmap_pgoff+0x3af/0x500 [ 39.016820] do_syscall_64+0x3f/0x90 [ 39.017299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.017971] RIP: 0033:0x7fc67574bd82 [ 39.018444] 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 [ 39.020678] RSP: 002b:00007ffe3dd5a148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.021607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc67574bd82 [ 39.022483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc674b85000 [ 39.023355] RBP: 00007fc674b85000 R08: 0000000000000009 R09: 0000000000001000 [ 39.024224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ced6270b20 [ 39.025101] R13: 00007ffe3dd5a160 R14: 00007ffe3dd5a190 R15: 00007ffe3dd5a4f0 [ 39.026031] [ 39.026334] [ 39.026552] Allocated by task 219: [ 39.027002] kasan_save_stack+0x22/0x50 [ 39.027515] kasan_set_track+0x25/0x30 [ 39.028005] __kasan_slab_alloc+0x59/0x70 [ 39.028540] kmem_cache_alloc+0x16b/0x370 [ 39.029119] vm_area_dup+0x20/0x160 [ 39.029600] __split_vma+0x170/0x950 [ 39.030091] split_vma+0xc6/0x110 [ 39.030538] mprotect_fixup+0x8d2/0xb30 [ 39.031061] do_mprotect_pkey+0x87e/0xd40 [ 39.031605] __x64_sys_mprotect+0x78/0xc0 [ 39.032148] do_syscall_64+0x3f/0x90 [ 39.032621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033285] [ 39.033500] Freed by task 204: [ 39.033900] kasan_save_stack+0x22/0x50 [ 39.034429] kasan_set_track+0x25/0x30 [ 39.034936] kasan_save_free_info+0x2b/0x50 [ 39.035464] __kasan_slab_free+0x10a/0x190 [ 39.035989] kmem_cache_free+0x10d/0x4d0 [ 39.036497] rcu_core+0x8c8/0x2860 [ 39.036948] __do_softirq+0x1b7/0x7d4 [ 39.037425] [ 39.037646] Last potentially related work creation: [ 39.038235] kasan_save_stack+0x22/0x50 [ 39.038732] __kasan_record_aux_stack+0x8e/0xa0 [ 39.039402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.040048] remove_vma+0x139/0x170 [ 39.040493] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.041083] do_vmi_munmap+0x1f1/0x2b0 [ 39.041588] __vm_munmap+0x138/0x3a0 [ 39.042051] __x64_sys_munmap+0x59/0x80 [ 39.042572] do_syscall_64+0x3f/0x90 [ 39.043074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043750] [ 39.043981] Second to last potentially related work creation: [ 39.044694] kasan_save_stack+0x22/0x50 [ 39.045204] __kasan_record_aux_stack+0x8e/0xa0 [ 39.045794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.046443] remove_vma+0x139/0x170 [ 39.046903] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.047478] __do_sys_brk+0x90d/0xc70 [ 39.047989] do_syscall_64+0x3f/0x90 [ 39.048514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.049211] [ 39.049438] The buggy address belongs to the object at ffff888019cc7bc8 [ 39.049438] which belongs to the cache vm_area_struct of size 168 [ 39.050934] The buggy address is located 88 bytes inside of [ 39.050934] freed 168-byte region [ffff888019cc7bc8, ffff888019cc7c70) [ 39.052355] [ 39.052599] The buggy address belongs to the physical page: [ 39.053300] page:00000000b63cd25d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cc7 [ 39.054400] memcg:ffff88800980c901 [ 39.054822] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.055516] page_type: 0xffffffff() [ 39.055977] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b83c0 dead000000000003 [ 39.056992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800980c901 [ 39.057970] page dumped because: kasan: bad access detected [ 39.058656] [ 39.058874] Memory state around the buggy address: [ 39.059481] ffff888019cc7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.060391] ffff888019cc7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.061305] >ffff888019cc7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.062204] ^ [ 39.062779] ffff888019cc7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.063679] ffff888019cc7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.064573] ================================================================== [ 39.065611] Disabling lock debugging due to kernel taint [ 41.581026] BUG: Bad rss-counter state mm:00000000efebe62d type:MM_FILEPAGES val:33 [ 41.582300] BUG: Bad rss-counter state mm:00000000efebe62d type:MM_ANONPAGES val:22 [ 42.073681] BUG: Bad rss-counter state mm:00000000166f6648 type:MM_FILEPAGES val:33 [ 42.074876] BUG: Bad rss-counter state mm:00000000166f6648 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45333' (ECDSA) to the list of known hosts. 2023/06/20 18:54:03 fuzzer started 2023/06/20 18:54:03 dialing manager at localhost:36067 2023/06/20 18:54:03 checking machine... 2023/06/20 18:54:03 checking revisions... [ 42.806196] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:03 testing simple program... [ 42.848201] cgroup: Unknown subsys name 'net' [ 42.903159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:03 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801666ff01 RSI=ffff88801666ff38 RDI=ffff88801666ff38 RBP=ffff88801666f788 RSP=ffff88801666f6c0 R8 =ffffffff863b3d32 R9 =ffff88801666f770 R10=0000000000038001 R11=000000000008aab1 R12=ffff88801666f790 R13=ffff88801666f778 R14=ffff88801666ff40 R15=ffff88801666f730 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f263353b900 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=00007ffc064f0000 CR3=000000000d70c000 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=0000000000000001 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=00007f34048da000 CR3=000000000ca26000 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=84772e702160688ed34c3c6b490b1302 XMM02=0000000000119c68eff9b2d0a8fce9cb XMM03=0000000000119d382c67c8bc2e329bc3 XMM04=4fd890029319aa5600000000000ae988 XMM05=8d1f220825b6f71d0000000000132190 XMM06=e8008b1642ea3e600000000000131b30 XMM07=e042d86d42eb936e0000000000120bb0 XMM08=8c3b4b47a17682860000000000119d38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000