syzkaller login: [ 29.672511] BUG: Bad rss-counter state mm:00000000d3a45955 type:MM_FILEPAGES val:33 [ 29.673859] BUG: Bad rss-counter state mm:00000000d3a45955 type:MM_ANONPAGES val:22 [ 29.808289] ================================================================== [ 29.809374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.810474] Read of size 8 at addr ffff888019cd5df0 by task sshd/219 [ 29.811565] [ 29.811825] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.812682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.813669] Call Trace: [ 29.813999] [ 29.814276] dump_stack_lvl+0x91/0xf0 [ 29.814768] print_report+0xcc/0x620 [ 29.815249] ? __virt_addr_valid+0x102/0x340 [ 29.815799] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.816414] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.817027] kasan_report+0xbe/0xf0 [ 29.817518] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.818137] vma_interval_tree_remove+0xc75/0xec0 [ 29.818740] vma_prepare+0xc54/0x11a0 [ 29.819214] __split_vma+0x5af/0x950 [ 29.819689] ? __pfx___split_vma+0x10/0x10 [ 29.820214] ? find_held_lock+0x2c/0x110 [ 29.820736] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.821328] ? lock_is_held_type+0x9f/0x120 [ 29.821868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.822463] ? mtree_range_walk+0x632/0x900 [ 29.823020] ? mas_walk+0x5c7/0x7c0 [ 29.823491] do_vmi_munmap+0x1f1/0x2b0 [ 29.823986] mmap_region+0x1f9/0x2660 [ 29.824465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.824981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.825698] ? __pfx_lock_acquire+0x10/0x10 [ 29.826230] ? __pfx_mmap_region+0x10/0x10 [ 29.826761] ? security_mmap_addr+0x7d/0xa0 [ 29.827289] ? get_unmapped_area+0x1f5/0x3f0 [ 29.827836] do_mmap+0x854/0xf00 [ 29.828426] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.828948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.829553] ksys_mmap_pgoff+0x3af/0x500 [ 29.830086] do_syscall_64+0x3f/0x90 [ 29.830584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.831246] RIP: 0033:0x7f40c9a30d82 [ 29.831729] 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 [ 29.833968] RSP: 002b:00007ffc3d4eac88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.834910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40c9a30d82 [ 29.835790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40c8e6a000 [ 29.836677] RBP: 00007f40c8e6a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.837578] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6858feec0 [ 29.838461] R13: 00007ffc3d4eaca0 R14: 00007ffc3d4eacd0 R15: 00007ffc3d4eb030 [ 29.839356] [ 29.839664] [ 29.839884] Allocated by task 212: [ 29.840338] kasan_save_stack+0x22/0x50 [ 29.840856] kasan_set_track+0x25/0x30 [ 29.841373] __kasan_slab_alloc+0x59/0x70 [ 29.841907] kmem_cache_alloc+0x16b/0x370 [ 29.842435] vm_area_dup+0x20/0x160 [ 29.842905] __split_vma+0x170/0x950 [ 29.843408] split_vma+0xc6/0x110 [ 29.843866] mprotect_fixup+0x8d2/0xb30 [ 29.844396] do_mprotect_pkey+0x87e/0xd40 [ 29.844928] __x64_sys_mprotect+0x78/0xc0 [ 29.845476] do_syscall_64+0x3f/0x90 [ 29.845968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.846621] [ 29.846840] Freed by task 212: [ 29.847241] kasan_save_stack+0x22/0x50 [ 29.847768] kasan_set_track+0x25/0x30 [ 29.848280] kasan_save_free_info+0x2b/0x50 [ 29.848831] __kasan_slab_free+0x10a/0x190 [ 29.849399] kmem_cache_free+0x10d/0x4d0 [ 29.849931] rcu_core+0x8c8/0x2860 [ 29.850401] __do_softirq+0x1b7/0x7d4 [ 29.850895] [ 29.851122] Last potentially related work creation: [ 29.851728] kasan_save_stack+0x22/0x50 [ 29.852246] __kasan_record_aux_stack+0x8e/0xa0 [ 29.852901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.853577] remove_vma+0x139/0x170 [ 29.854045] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.854626] do_vmi_munmap+0x1f1/0x2b0 [ 29.855130] __vm_munmap+0x138/0x3a0 [ 29.855617] __x64_sys_munmap+0x59/0x80 [ 29.856131] do_syscall_64+0x3f/0x90 [ 29.856627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.857311] [ 29.857535] The buggy address belongs to the object at ffff888019cd5d98 [ 29.857535] which belongs to the cache vm_area_struct of size 168 [ 29.859055] The buggy address is located 88 bytes inside of [ 29.859055] freed 168-byte region [ffff888019cd5d98, ffff888019cd5e40) [ 29.860526] [ 29.860750] The buggy address belongs to the physical page: [ 29.861458] page:00000000c4945b5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd5 [ 29.862598] memcg:ffff88800fc66c01 [ 29.863044] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.863714] page_type: 0xffffffff() [ 29.864184] raw: 0100000000000200 ffff8880087a0c80 ffffea0000394f00 dead000000000004 [ 29.865165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc66c01 [ 29.866144] page dumped because: kasan: bad access detected [ 29.866835] [ 29.867059] Memory state around the buggy address: [ 29.867674] ffff888019cd5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.868591] ffff888019cd5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.869511] >ffff888019cd5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.870405] ^ [ 29.871253] ffff888019cd5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.872163] ffff888019cd5e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.873046] ================================================================== [ 29.874006] Disabling lock debugging due to kernel taint [ 31.892314] BUG: Bad rss-counter state mm:000000002220e1ef type:MM_FILEPAGES val:33 [ 31.893476] BUG: Bad rss-counter state mm:000000002220e1ef type:MM_ANONPAGES val:22 [ 32.285017] BUG: Bad rss-counter state mm:00000000a244dd35 type:MM_FILEPAGES val:33 [ 32.286321] BUG: Bad rss-counter state mm:00000000a244dd35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26798' (ECDSA) to the list of known hosts. 2023/06/20 16:14:26 fuzzer started 2023/06/20 16:14:27 dialing manager at localhost:36067 2023/06/20 16:14:27 checking machine... 2023/06/20 16:14:27 checking revisions... [ 32.994827] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:14:27 testing simple program... [ 33.040423] cgroup: Unknown subsys name 'net' [ 33.092553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:14:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11002ceeeb5 RSI=0000000000000000 RDI=ffff8880167775b0 RBP=00000000000000f4 RSP=ffff8880167774f0 R8 =ffffffff864bbb58 R9 =ffff8880167775a0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888016777f58 R13=ffff8880167775a8 R14=ffff888016777f58 R15=ffff888016777560 RIP=ffffffff81131c60 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 00007fa291c59900 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=00007ffe17ee1000 CR3=000000001c628000 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=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888008da7c58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000003 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85616758 R15=0000000000000000 RIP=ffffffff8135b979 RFL=00000002 [-------] 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=00007fa7267b69e0 CR3=000000000c6ba000 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=b0c1e6bd482912b3f34d84a5323ad27c XMM02=2c67c8bc2e329bc3000000000011a770 XMM03=fb795ef6d65770560000000000121a18 XMM04=bb73be4a85f36a1200000000000ae988 XMM05=dfcdbad4f1609c370000000000131bd0 XMM06=806171799158d9670000000000131a58 XMM07=e042d86d42eb936e0000000000121c98 XMM08=a5359ef6aceef681000000000011a7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000