syzkaller login: [ 42.574185] BUG: Bad rss-counter state mm:000000008ac42503 type:MM_FILEPAGES val:33 [ 42.574702] BUG: Bad rss-counter state mm:000000008ac42503 type:MM_ANONPAGES val:22 [ 42.699193] ================================================================== [ 42.699842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.700514] Read of size 8 at addr ffff88800d7e56b0 by task sshd/224 [ 42.701058] [ 42.701212] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 42.702121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.703090] Call Trace: [ 42.703329] [ 42.703532] dump_stack_lvl+0x91/0xf0 [ 42.703904] print_report+0xcc/0x620 [ 42.704263] ? __virt_addr_valid+0x102/0x340 [ 42.704694] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.705157] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.705622] kasan_report+0xbe/0xf0 [ 42.705993] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.706454] vma_interval_tree_remove+0xc75/0xec0 [ 42.706904] vma_prepare+0xc54/0x11a0 [ 42.707258] __split_vma+0x5af/0x950 [ 42.707735] ? __pfx___split_vma+0x10/0x10 [ 42.708136] ? find_held_lock+0x2c/0x110 [ 42.708534] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.708960] ? lock_is_held_type+0x9f/0x120 [ 42.709380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.709895] ? mtree_range_walk+0x632/0x900 [ 42.710315] ? mas_walk+0x5c7/0x7c0 [ 42.710570] do_vmi_munmap+0x1f1/0x2b0 [ 42.710829] mmap_region+0x1f9/0x2660 [ 42.711079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.711346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.711781] ? __pfx_lock_acquire+0x10/0x10 [ 42.712100] ? __pfx_mmap_region+0x10/0x10 [ 42.712424] ? security_mmap_addr+0x7d/0xa0 [ 42.712754] ? get_unmapped_area+0x1f5/0x3f0 [ 42.713087] do_mmap+0x854/0xf00 [ 42.713358] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.713662] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.714038] ksys_mmap_pgoff+0x3af/0x500 [ 42.714315] do_syscall_64+0x3f/0x90 [ 42.714573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.714903] RIP: 0033:0x7fb43dd1bd82 [ 42.715142] 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 [ 42.716210] RSP: 002b:00007ffe2ef89638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.716670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb43dd1bd82 [ 42.717185] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb43d155000 [ 42.717708] RBP: 00007fb43d155000 R08: 0000000000000009 R09: 0000000000001000 [ 42.718207] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558269e6df70 [ 42.718635] R13: 00007ffe2ef89650 R14: 00007ffe2ef89680 R15: 00007ffe2ef899e0 [ 42.719092] [ 42.719277] [ 42.719405] Allocated by task 216: [ 42.719626] kasan_save_stack+0x22/0x50 [ 42.719886] kasan_set_track+0x25/0x30 [ 42.720137] __kasan_slab_alloc+0x59/0x70 [ 42.720407] kmem_cache_alloc+0x16b/0x370 [ 42.720668] vm_area_dup+0x20/0x160 [ 42.720901] __split_vma+0x170/0x950 [ 42.721139] split_vma+0xc6/0x110 [ 42.721362] mprotect_fixup+0x8d2/0xb30 [ 42.721618] do_mprotect_pkey+0x87e/0xd40 [ 42.721901] __x64_sys_mprotect+0x78/0xc0 [ 42.722166] do_syscall_64+0x3f/0x90 [ 42.722477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.723053] [ 42.723172] Freed by task 216: [ 42.723424] kasan_save_stack+0x22/0x50 [ 42.723733] kasan_set_track+0x25/0x30 [ 42.724044] kasan_save_free_info+0x2b/0x50 [ 42.724371] __kasan_slab_free+0x10a/0x190 [ 42.724688] kmem_cache_free+0x10d/0x4d0 [ 42.725003] rcu_core+0x8c8/0x2860 [ 42.725279] __do_softirq+0x1b7/0x7d4 [ 42.725569] [ 42.725700] Last potentially related work creation: [ 42.726096] kasan_save_stack+0x22/0x50 [ 42.726393] __kasan_record_aux_stack+0x8e/0xa0 [ 42.726736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.727131] remove_vma+0x139/0x170 [ 42.727412] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.727728] do_vmi_munmap+0x1f1/0x2b0 [ 42.728029] __vm_munmap+0x138/0x3a0 [ 42.728298] __x64_sys_munmap+0x59/0x80 [ 42.728582] do_syscall_64+0x3f/0x90 [ 42.728863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.729262] [ 42.729384] The buggy address belongs to the object at ffff88800d7e5658 [ 42.729384] which belongs to the cache vm_area_struct of size 168 [ 42.730269] The buggy address is located 88 bytes inside of [ 42.730269] freed 168-byte region [ffff88800d7e5658, ffff88800d7e5700) [ 42.731090] [ 42.731225] The buggy address belongs to the physical page: [ 42.731618] page:0000000045aca0a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7e5 [ 42.732253] memcg:ffff888010339c01 [ 42.732510] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.732906] page_type: 0xffffffff() [ 42.733177] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 42.733664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010339c01 [ 42.734126] page dumped because: kasan: bad access detected [ 42.734457] [ 42.734568] Memory state around the buggy address: [ 42.734868] ffff88800d7e5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.735302] ffff88800d7e5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.735837] >ffff88800d7e5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.736267] ^ [ 42.736562] ffff88800d7e5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.736993] ffff88800d7e5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.737424] ================================================================== [ 42.738179] Disabling lock debugging due to kernel taint [ 44.397112] BUG: Bad rss-counter state mm:000000003089e7e6 type:MM_FILEPAGES val:33 [ 44.397703] BUG: Bad rss-counter state mm:000000003089e7e6 type:MM_ANONPAGES val:22 [ 44.875691] BUG: Bad rss-counter state mm:0000000081ed39cb type:MM_FILEPAGES val:33 [ 44.876670] BUG: Bad rss-counter state mm:0000000081ed39cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48284' (ECDSA) to the list of known hosts. 2023/06/21 00:08:51 fuzzer started 2023/06/21 00:08:52 dialing manager at localhost:36067 2023/06/21 00:08:52 checking machine... 2023/06/21 00:08:52 checking revisions... [ 46.223191] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:08:52 testing simple program... [ 46.285356] cgroup: Unknown subsys name 'net' [ 46.350944] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:08:51 Registers: info registers vcpu 0 RAX=1ffff110012c105f RBX=ffff8880096082c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880096082f8 RBP=ffff8880096115f0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880096098a0 R14=ffffffff813782f8 R15=ffff8880096098a0 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f075a0fb900 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=00007f075a0da020 CR3=0000000019858000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007ffea6eeacc8 CR3=0000000005482000 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=00007f19557cd510000055b8f6175790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000