syzkaller login: [ 30.511393] BUG: Bad rss-counter state mm:000000002da64e24 type:MM_FILEPAGES val:33 [ 30.512610] BUG: Bad rss-counter state mm:000000002da64e24 type:MM_ANONPAGES val:22 [ 30.668101] ================================================================== [ 30.669096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.670060] Read of size 8 at addr ffff888014755a50 by task sshd/219 [ 30.670862] [ 30.671088] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.672075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.673103] Call Trace: [ 30.673440] [ 30.673755] dump_stack_lvl+0x91/0xf0 [ 30.674260] print_report+0xcc/0x620 [ 30.674766] ? __virt_addr_valid+0x102/0x340 [ 30.675338] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675982] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676651] kasan_report+0xbe/0xf0 [ 30.677148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677785] vma_interval_tree_remove+0xc75/0xec0 [ 30.678403] vma_prepare+0xc54/0x11a0 [ 30.678906] __split_vma+0x5af/0x950 [ 30.679397] ? __pfx___split_vma+0x10/0x10 [ 30.679952] ? find_held_lock+0x2c/0x110 [ 30.680509] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.681089] ? lock_is_held_type+0x9f/0x120 [ 30.681655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.682284] ? mtree_range_walk+0x632/0x900 [ 30.682858] ? mas_walk+0x5c7/0x7c0 [ 30.683361] do_vmi_munmap+0x1f1/0x2b0 [ 30.683871] mmap_region+0x1f9/0x2660 [ 30.684379] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.684922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.685665] ? __pfx_lock_acquire+0x10/0x10 [ 30.686210] ? __pfx_mmap_region+0x10/0x10 [ 30.686755] ? security_mmap_addr+0x7d/0xa0 [ 30.687308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.687876] do_mmap+0x854/0xf00 [ 30.688337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.688872] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.689458] ksys_mmap_pgoff+0x3af/0x500 [ 30.689983] do_syscall_64+0x3f/0x90 [ 30.690481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691161] RIP: 0033:0x7fa48c25fd82 [ 30.691634] 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 [ 30.693846] RSP: 002b:00007fff3103eaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.694781] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa48c25fd82 [ 30.695654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa48b699000 [ 30.696552] RBP: 00007fa48b699000 R08: 0000000000000009 R09: 0000000000001000 [ 30.697436] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558851acb20 [ 30.698315] R13: 00007fff3103eac0 R14: 00007fff3103eaf0 R15: 00007fff3103ee50 [ 30.699208] [ 30.699512] [ 30.699733] Allocated by task 212: [ 30.700169] kasan_save_stack+0x22/0x50 [ 30.700708] kasan_set_track+0x25/0x30 [ 30.701234] __kasan_slab_alloc+0x59/0x70 [ 30.701779] kmem_cache_alloc+0x16b/0x370 [ 30.702306] vm_area_dup+0x20/0x160 [ 30.702785] __split_vma+0x170/0x950 [ 30.703268] split_vma+0xc6/0x110 [ 30.703717] mprotect_fixup+0x8d2/0xb30 [ 30.704245] do_mprotect_pkey+0x87e/0xd40 [ 30.704800] __x64_sys_mprotect+0x78/0xc0 [ 30.705343] do_syscall_64+0x3f/0x90 [ 30.705842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.706519] [ 30.706746] Freed by task 13: [ 30.707141] kasan_save_stack+0x22/0x50 [ 30.707657] kasan_set_track+0x25/0x30 [ 30.708167] kasan_save_free_info+0x2b/0x50 [ 30.708742] __kasan_slab_free+0x10a/0x190 [ 30.709292] kmem_cache_free+0x10d/0x4d0 [ 30.709816] rcu_core+0x8c8/0x2860 [ 30.710280] __do_softirq+0x1b7/0x7d4 [ 30.710775] [ 30.710996] Last potentially related work creation: [ 30.711614] kasan_save_stack+0x22/0x50 [ 30.712133] __kasan_record_aux_stack+0x8e/0xa0 [ 30.712733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.713387] remove_vma+0x139/0x170 [ 30.713850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.714417] do_vmi_munmap+0x1f1/0x2b0 [ 30.714913] __vm_munmap+0x138/0x3a0 [ 30.715395] __x64_sys_munmap+0x59/0x80 [ 30.715903] do_syscall_64+0x3f/0x90 [ 30.716415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.717075] [ 30.717300] The buggy address belongs to the object at ffff8880147559f8 [ 30.717300] which belongs to the cache vm_area_struct of size 168 [ 30.718819] The buggy address is located 88 bytes inside of [ 30.718819] freed 168-byte region [ffff8880147559f8, ffff888014755aa0) [ 30.720269] [ 30.720498] The buggy address belongs to the physical page: [ 30.721180] page:0000000063adcd5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14755 [ 30.722322] memcg:ffff888014752101 [ 30.722762] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.723426] page_type: 0xffffffff() [ 30.723893] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.724862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014752101 [ 30.725800] page dumped because: kasan: bad access detected [ 30.726492] [ 30.726714] Memory state around the buggy address: [ 30.727304] ffff888014755900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.728192] ffff888014755980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.729103] >ffff888014755a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.729989] ^ [ 30.730711] ffff888014755a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.731598] ffff888014755b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.732492] ================================================================== [ 30.733483] Disabling lock debugging due to kernel taint [ 32.800482] BUG: Bad rss-counter state mm:00000000308cfe14 type:MM_FILEPAGES val:33 [ 32.801477] BUG: Bad rss-counter state mm:00000000308cfe14 type:MM_ANONPAGES val:22 [ 33.337396] BUG: Bad rss-counter state mm:00000000e758a123 type:MM_FILEPAGES val:33 [ 33.338660] BUG: Bad rss-counter state mm:00000000e758a123 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49144' (ECDSA) to the list of known hosts. 2023/06/20 12:02:54 fuzzer started 2023/06/20 12:02:54 dialing manager at localhost:36067 2023/06/20 12:02:54 checking machine... 2023/06/20 12:02:54 checking revisions... [ 33.928241] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:02:54 testing simple program... [ 33.971157] cgroup: Unknown subsys name 'net' [ 34.004185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:02:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f69f1cfbb50 CR3=000000000d85a000 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=2034353a32303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f85f4518000 RCX=ffffffff8175cf40 RDX=ffff888015b83680 RSI=0000000000000000 RDI=0000000000000007 RBP=000000001a3fc007 RSP=ffff888015a97cf8 R8 =0000000000000007 R9 =0000000000000000 R10=000000001a3fc007 R11=0000000000000000 R12=000000001a3fc067 R13=ffff88800ba5fd10 R14=ffff888015a97df0 R15=000000000ba5f067 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f85f3da5900 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=00007f85f451830c CR3=000000000f66e000 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=6720646572637465733a4d41503d706f 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