syzkaller login: [ 30.529982] BUG: Bad rss-counter state mm:0000000002487520 type:MM_FILEPAGES val:33 [ 30.531274] BUG: Bad rss-counter state mm:0000000002487520 type:MM_ANONPAGES val:22 [ 30.697742] ================================================================== [ 30.698685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.699663] Read of size 8 at addr ffff88800e913228 by task sshd/221 [ 30.700466] [ 30.700695] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.701773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.702805] Call Trace: [ 30.703137] [ 30.703451] dump_stack_lvl+0x91/0xf0 [ 30.703967] print_report+0xcc/0x620 [ 30.704466] ? __virt_addr_valid+0x102/0x340 [ 30.705033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705693] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706333] kasan_report+0xbe/0xf0 [ 30.706815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707426] vma_interval_tree_remove+0xc75/0xec0 [ 30.708043] vma_prepare+0xc54/0x11a0 [ 30.708517] __split_vma+0x5af/0x950 [ 30.708987] ? __pfx___split_vma+0x10/0x10 [ 30.709530] ? find_held_lock+0x2c/0x110 [ 30.710052] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.710616] ? lock_is_held_type+0x9f/0x120 [ 30.711153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.711770] ? mtree_range_walk+0x632/0x900 [ 30.712319] ? mas_walk+0x5c7/0x7c0 [ 30.712799] do_vmi_munmap+0x1f1/0x2b0 [ 30.713306] mmap_region+0x1f9/0x2660 [ 30.713786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.714296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.715011] ? __pfx_lock_acquire+0x10/0x10 [ 30.715546] ? __pfx_mmap_region+0x10/0x10 [ 30.716077] ? security_mmap_addr+0x7d/0xa0 [ 30.716607] ? get_unmapped_area+0x1f5/0x3f0 [ 30.717148] do_mmap+0x854/0xf00 [ 30.717594] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.718646] ksys_mmap_pgoff+0x3af/0x500 [ 30.719147] do_syscall_64+0x3f/0x90 [ 30.719631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720283] RIP: 0033:0x7f12a2abad82 [ 30.720744] 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 [ 30.722872] RSP: 002b:00007ffd80fd2ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.723770] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12a2abad82 [ 30.724614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12a1ef4000 [ 30.725475] RBP: 00007f12a1ef4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.726334] R10: 0000000000000812 R11: 0000000000000206 R12: 000055773601cec0 [ 30.727176] R13: 00007ffd80fd2ec0 R14: 00007ffd80fd2ef0 R15: 00007ffd80fd3250 [ 30.728039] [ 30.728338] [ 30.728557] Allocated by task 214: [ 30.728986] kasan_save_stack+0x22/0x50 [ 30.729493] kasan_set_track+0x25/0x30 [ 30.729984] __kasan_slab_alloc+0x59/0x70 [ 30.730514] kmem_cache_alloc+0x16b/0x370 [ 30.731025] vm_area_dup+0x20/0x160 [ 30.731477] __split_vma+0x170/0x950 [ 30.731952] split_vma+0xc6/0x110 [ 30.732394] mprotect_fixup+0x8d2/0xb30 [ 30.732900] do_mprotect_pkey+0x87e/0xd40 [ 30.733434] __x64_sys_mprotect+0x78/0xc0 [ 30.733953] do_syscall_64+0x3f/0x90 [ 30.734424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735076] [ 30.735291] Freed by task 204: [ 30.735683] kasan_save_stack+0x22/0x50 [ 30.736189] kasan_set_track+0x25/0x30 [ 30.736678] kasan_save_free_info+0x2b/0x50 [ 30.737211] __kasan_slab_free+0x10a/0x190 [ 30.737762] kmem_cache_free+0x10d/0x4d0 [ 30.738287] rcu_core+0x8c8/0x2860 [ 30.738734] __do_softirq+0x1b7/0x7d4 [ 30.739217] [ 30.739432] Last potentially related work creation: [ 30.740014] kasan_save_stack+0x22/0x50 [ 30.740516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.741092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.741737] remove_vma+0x139/0x170 [ 30.742219] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.742800] do_vmi_munmap+0x1f1/0x2b0 [ 30.743283] __vm_munmap+0x138/0x3a0 [ 30.743754] __x64_sys_munmap+0x59/0x80 [ 30.744255] do_syscall_64+0x3f/0x90 [ 30.744724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745393] [ 30.745608] The buggy address belongs to the object at ffff88800e9131d0 [ 30.745608] which belongs to the cache vm_area_struct of size 168 [ 30.747074] The buggy address is located 88 bytes inside of [ 30.747074] freed 168-byte region [ffff88800e9131d0, ffff88800e913278) [ 30.748472] [ 30.748685] The buggy address belongs to the physical page: [ 30.749352] page:000000006c1e86c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe913 [ 30.750431] memcg:ffff88801a0c0e01 [ 30.750856] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.751500] page_type: 0xffffffff() [ 30.751946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.752867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0c0e01 [ 30.753783] page dumped because: kasan: bad access detected [ 30.754439] [ 30.754658] Memory state around the buggy address: [ 30.755254] ffff88800e913100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.756104] ffff88800e913180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.757006] >ffff88800e913200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.757880] ^ [ 30.758433] ffff88800e913280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.759293] ffff88800e913300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.760138] ================================================================== [ 30.761057] Disabling lock debugging due to kernel taint [ 32.886104] BUG: Bad rss-counter state mm:00000000809eafd9 type:MM_FILEPAGES val:33 [ 32.887087] BUG: Bad rss-counter state mm:00000000809eafd9 type:MM_ANONPAGES val:22 [ 33.366206] BUG: Bad rss-counter state mm:00000000d03e24ad type:MM_FILEPAGES val:33 [ 33.367368] BUG: Bad rss-counter state mm:00000000d03e24ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53627' (ECDSA) to the list of known hosts. 2023/06/20 21:52:10 fuzzer started 2023/06/20 21:52:10 dialing manager at localhost:36067 2023/06/20 21:52:10 checking machine... 2023/06/20 21:52:10 checking revisions... [ 34.055920] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:52:10 testing simple program... [ 34.105339] cgroup: Unknown subsys name 'net' [ 34.155429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:10 Registers: info registers vcpu 0 RAX=ffffffffffffffff RBX=000000000001a386 RCX=0000000000000004 RDX=0000000000000200 RSI=00000000000000ff RDI=ffffed1003470cc0 RBP=0000000000000000 RSP=ffff88801a1f7a48 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed1003470c00 R11=00000000000c000b R12=0000000000000000 R13=ffffffff852c61f8 R14=ffffffff852c61e8 R15=ffffea000068e180 RIP=ffffffff8451340e 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 00007f75b7cd9900 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=00007f75b828e650 CR3=000000000e64e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=ffff888015bad1c0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028ecef6 RSP=ffff888014767798 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007ff12587c900 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=00007ff124cfa840 CR3=000000000d68a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c0fd1088f0a0b70300000000000ae988 XMM05=c3b0f5cf4a3fdf9500000000001322e8 XMM06=c291bd5c70af25b900000000001310d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000