syzkaller login: [ 31.189173] BUG: Bad rss-counter state mm:00000000b4918acc type:MM_FILEPAGES val:33 [ 31.190675] BUG: Bad rss-counter state mm:00000000b4918acc type:MM_ANONPAGES val:22 [ 31.345300] ================================================================== [ 31.346245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.347182] Read of size 8 at addr ffff888014681b38 by task sshd/220 [ 31.347965] [ 31.348188] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.349189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350176] Call Trace: [ 31.350499] [ 31.350790] dump_stack_lvl+0x91/0xf0 [ 31.351310] print_report+0xcc/0x620 [ 31.351804] ? __virt_addr_valid+0x102/0x340 [ 31.352377] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352994] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353619] kasan_report+0xbe/0xf0 [ 31.354102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354738] vma_interval_tree_remove+0xc75/0xec0 [ 31.355351] vma_prepare+0xc54/0x11a0 [ 31.355840] __split_vma+0x5af/0x950 [ 31.356324] ? __pfx___split_vma+0x10/0x10 [ 31.356858] ? find_held_lock+0x2c/0x110 [ 31.357388] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357957] ? lock_is_held_type+0x9f/0x120 [ 31.358502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.359122] ? mtree_range_walk+0x632/0x900 [ 31.359679] ? mas_walk+0x5c7/0x7c0 [ 31.360189] do_vmi_munmap+0x1f1/0x2b0 [ 31.360681] mmap_region+0x1f9/0x2660 [ 31.361163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362402] ? __pfx_lock_acquire+0x10/0x10 [ 31.362946] ? __pfx_mmap_region+0x10/0x10 [ 31.363484] ? security_mmap_addr+0x7d/0xa0 [ 31.364026] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364588] do_mmap+0x854/0xf00 [ 31.365042] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.365539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366109] ksys_mmap_pgoff+0x3af/0x500 [ 31.366625] do_syscall_64+0x3f/0x90 [ 31.367103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367754] RIP: 0033:0x7f5f4c26ad82 [ 31.368224] 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 [ 31.370368] RSP: 002b:00007ffc09e4c8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.371312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f4c26ad82 [ 31.372183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f4b6a4000 [ 31.373032] RBP: 00007f5f4b6a4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.373898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4be931b20 [ 31.374760] R13: 00007ffc09e4c8e0 R14: 00007ffc09e4c910 R15: 00007ffc09e4cc70 [ 31.375634] [ 31.375941] [ 31.376156] Allocated by task 213: [ 31.376599] kasan_save_stack+0x22/0x50 [ 31.377120] kasan_set_track+0x25/0x30 [ 31.377642] __kasan_slab_alloc+0x59/0x70 [ 31.378169] kmem_cache_alloc+0x16b/0x370 [ 31.378690] vm_area_dup+0x20/0x160 [ 31.379149] __split_vma+0x170/0x950 [ 31.379621] split_vma+0xc6/0x110 [ 31.380076] mprotect_fixup+0x8d2/0xb30 [ 31.380586] do_mprotect_pkey+0x87e/0xd40 [ 31.381112] __x64_sys_mprotect+0x78/0xc0 [ 31.381636] do_syscall_64+0x3f/0x90 [ 31.382111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382771] [ 31.382995] Freed by task 213: [ 31.383393] kasan_save_stack+0x22/0x50 [ 31.383900] kasan_set_track+0x25/0x30 [ 31.384425] kasan_save_free_info+0x2b/0x50 [ 31.384967] __kasan_slab_free+0x10a/0x190 [ 31.385505] kmem_cache_free+0x10d/0x4d0 [ 31.386025] rcu_core+0x8c8/0x2860 [ 31.386476] __do_softirq+0x1b7/0x7d4 [ 31.386972] [ 31.387192] Last potentially related work creation: [ 31.387791] kasan_save_stack+0x22/0x50 [ 31.388302] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389525] remove_vma+0x139/0x170 [ 31.389989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390541] do_vmi_munmap+0x1f1/0x2b0 [ 31.391051] __vm_munmap+0x138/0x3a0 [ 31.391513] __x64_sys_munmap+0x59/0x80 [ 31.392020] do_syscall_64+0x3f/0x90 [ 31.392513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393172] [ 31.393386] The buggy address belongs to the object at ffff888014681ae0 [ 31.393386] which belongs to the cache vm_area_struct of size 168 [ 31.394878] The buggy address is located 88 bytes inside of [ 31.394878] freed 168-byte region [ffff888014681ae0, ffff888014681b88) [ 31.396340] [ 31.396557] The buggy address belongs to the physical page: [ 31.397234] page:00000000a88462c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14681 [ 31.398336] memcg:ffff88800eacfb01 [ 31.398762] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.399407] page_type: 0xffffffff() [ 31.399859] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.400784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eacfb01 [ 31.401700] page dumped because: kasan: bad access detected [ 31.402373] [ 31.402589] Memory state around the buggy address: [ 31.403171] ffff888014681a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.404057] ffff888014681a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.404925] >ffff888014681b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.405784] ^ [ 31.406408] ffff888014681b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.407271] ffff888014681c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.408134] ================================================================== [ 31.409195] Disabling lock debugging due to kernel taint [ 34.537433] BUG: Bad rss-counter state mm:0000000004d24651 type:MM_FILEPAGES val:33 [ 34.538426] BUG: Bad rss-counter state mm:0000000004d24651 type:MM_ANONPAGES val:22 [ 34.983738] BUG: Bad rss-counter state mm:00000000ba3ecd61 type:MM_FILEPAGES val:33 [ 34.985054] BUG: Bad rss-counter state mm:00000000ba3ecd61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46900' (ECDSA) to the list of known hosts. 2023/06/20 18:36:31 fuzzer started 2023/06/20 18:36:31 dialing manager at localhost:36067 2023/06/20 18:36:31 checking machine... 2023/06/20 18:36:31 checking revisions... [ 35.698311] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:36:31 testing simple program... [ 35.755067] cgroup: Unknown subsys name 'net' [ 35.793845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:30 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801830fb78 RCX=ffffffff844f7ee0 RDX=ffff88801460d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000011 RSP=ffff88801830fad8 R8 =0000000000000007 R9 =0000000000001000 R10=ffff8880088c8842 R11=0000000000000001 R12=ffff8880088c8842 R13=ffff88801830fb90 R14=0000000000000002 R15=0000000000000cc0 RIP=ffffffff814c0261 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 00007f21111f8900 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=00007f21117af618 CR3=0000000018260000 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=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=00007fb1908de6e0 CR3=000000000c704000 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=9c5d701296026cb2204137a3ca267fad XMM02=ec2efd57dc4c00df000000000011dbf8 XMM03=5dc27c293765ef5b000000000011dcc8 XMM04=1de3c074c33ad27600000000000ae988 XMM05=19e9129bd510f2350000000000132278 XMM06=0f36b85ecd88123d00000000001310e0 XMM07=e042d86d42eb936e0000000000122688 XMM08=5dc27c293765ef5b000000000011dcc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000