syzkaller login: [ 28.902117] BUG: Bad rss-counter state mm:000000002714e6a9 type:MM_FILEPAGES val:33 [ 28.903409] BUG: Bad rss-counter state mm:000000002714e6a9 type:MM_ANONPAGES val:22 [ 28.941494] ================================================================== [ 28.942509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.943556] Read of size 8 at addr ffff888019cf3df0 by task sshd/219 [ 28.944478] [ 28.944705] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.945567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.946556] Call Trace: [ 28.946877] [ 28.947162] dump_stack_lvl+0x91/0xf0 [ 28.947664] print_report+0xcc/0x620 [ 28.948182] ? __virt_addr_valid+0x102/0x340 [ 28.948744] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.949362] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.949995] kasan_report+0xbe/0xf0 [ 28.950482] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.951106] vma_interval_tree_remove+0xc75/0xec0 [ 28.951707] vma_prepare+0xc54/0x11a0 [ 28.952215] __split_vma+0x5af/0x950 [ 28.952685] ? __pfx___split_vma+0x10/0x10 [ 28.953217] ? find_held_lock+0x2c/0x110 [ 28.953755] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.954321] ? lock_is_held_type+0x9f/0x120 [ 28.954871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.955478] ? mtree_range_walk+0x632/0x900 [ 28.956044] ? mas_walk+0x5c7/0x7c0 [ 28.956540] do_vmi_munmap+0x1f1/0x2b0 [ 28.957039] mmap_region+0x1f9/0x2660 [ 28.957529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.958042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.958779] ? __pfx_lock_acquire+0x10/0x10 [ 28.959309] ? __pfx_mmap_region+0x10/0x10 [ 28.959849] ? security_mmap_addr+0x7d/0xa0 [ 28.960415] ? get_unmapped_area+0x1f5/0x3f0 [ 28.960980] do_mmap+0x854/0xf00 [ 28.961427] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.961937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.962502] ksys_mmap_pgoff+0x3af/0x500 [ 28.963022] do_syscall_64+0x3f/0x90 [ 28.963513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964190] RIP: 0033:0x7f6b1276fd82 [ 28.964659] 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 [ 28.966821] RSP: 002b:00007ffc20d8dce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.967748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b1276fd82 [ 28.968626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b11ba9000 [ 28.969491] RBP: 00007f6b11ba9000 R08: 0000000000000009 R09: 0000000000001000 [ 28.970349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a258ec3ec0 [ 28.971231] R13: 00007ffc20d8dd00 R14: 00007ffc20d8dd30 R15: 00007ffc20d8e090 [ 28.972126] [ 28.972431] [ 28.972653] Allocated by task 212: [ 28.973098] kasan_save_stack+0x22/0x50 [ 28.973618] kasan_set_track+0x25/0x30 [ 28.974127] __kasan_slab_alloc+0x59/0x70 [ 28.974664] kmem_cache_alloc+0x16b/0x370 [ 28.975198] vm_area_dup+0x20/0x160 [ 28.975670] __split_vma+0x170/0x950 [ 28.976168] split_vma+0xc6/0x110 [ 28.976620] mprotect_fixup+0x8d2/0xb30 [ 28.977137] do_mprotect_pkey+0x87e/0xd40 [ 28.977685] __x64_sys_mprotect+0x78/0xc0 [ 28.978233] do_syscall_64+0x3f/0x90 [ 28.978744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.979425] [ 28.979649] Freed by task 212: [ 28.980063] kasan_save_stack+0x22/0x50 [ 28.980617] kasan_set_track+0x25/0x30 [ 28.981141] kasan_save_free_info+0x2b/0x50 [ 28.981717] __kasan_slab_free+0x10a/0x190 [ 28.982278] kmem_cache_free+0x10d/0x4d0 [ 28.982824] rcu_core+0x8c8/0x2860 [ 28.983291] __do_softirq+0x1b7/0x7d4 [ 28.983794] [ 28.984020] Last potentially related work creation: [ 28.984714] kasan_save_stack+0x22/0x50 [ 28.985243] __kasan_record_aux_stack+0x8e/0xa0 [ 28.985865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.986539] remove_vma+0x139/0x170 [ 28.987019] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.987604] do_vmi_munmap+0x1f1/0x2b0 [ 28.988138] __vm_munmap+0x138/0x3a0 [ 28.988632] __x64_sys_munmap+0x59/0x80 [ 28.989161] do_syscall_64+0x3f/0x90 [ 28.989671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.990356] [ 28.990581] The buggy address belongs to the object at ffff888019cf3d98 [ 28.990581] which belongs to the cache vm_area_struct of size 168 [ 28.992144] The buggy address is located 88 bytes inside of [ 28.992144] freed 168-byte region [ffff888019cf3d98, ffff888019cf3e40) [ 28.993637] [ 28.993874] The buggy address belongs to the physical page: [ 28.994568] page:00000000ad2ce39f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cf3 [ 28.995731] memcg:ffff888017ea7f01 [ 28.996195] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.996881] page_type: 0xffffffff() [ 28.997364] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a0c0 dead000000000004 [ 28.998346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ea7f01 [ 28.999310] page dumped because: kasan: bad access detected [ 29.000011] [ 29.000264] Memory state around the buggy address: [ 29.000883] ffff888019cf3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.001804] ffff888019cf3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.002740] >ffff888019cf3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.003663] ^ [ 29.004554] ffff888019cf3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.005485] ffff888019cf3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.006404] ================================================================== [ 29.007420] Disabling lock debugging due to kernel taint [ 30.589180] BUG: Bad rss-counter state mm:00000000403f590d type:MM_FILEPAGES val:33 [ 30.589934] BUG: Bad rss-counter state mm:00000000403f590d type:MM_ANONPAGES val:22 [ 31.048242] BUG: Bad rss-counter state mm:00000000bab2bcb4 type:MM_FILEPAGES val:33 [ 31.049866] BUG: Bad rss-counter state mm:00000000bab2bcb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38149' (ECDSA) to the list of known hosts. 2023/06/20 21:11:14 fuzzer started 2023/06/20 21:11:15 dialing manager at localhost:36067 2023/06/20 21:11:15 checking machine... 2023/06/20 21:11:15 checking revisions... [ 31.786846] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:11:15 testing simple program... [ 31.832756] cgroup: Unknown subsys name 'net' [ 31.882790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:11:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81803d88 RDX=000000000000803d RSI=000000000000803d RDI=ffffffff86509ae4 RBP=ffff88800e6df3a0 RSP=ffff88800e6df2d8 R8 =0000000000000000 R9 =ffff88800e6df388 R10=0000000000038001 R11=00000000000219f3 R12=ffff88800e6df3a8 R13=ffff88800e6df390 R14=ffff88800e6df389 R15=ffff88800e6df348 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f7b81f39900 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=00007f7b824ee650 CR3=000000000e622000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fc36b322310 CR3=000000001028e000 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=ccfadd96763b09b2914ee084f28f3b29 XMM02=0000000000119df8eff9b2d0a8fce9cb XMM03=0000000000119ec82c67c8bc2e329bc3 XMM04=19834ec42ff2c9fe00000000000ae988 XMM05=19e9129bd510f23500000000001311c0 XMM06=1f3c7e1f083e53490000000000130028 XMM07=e042d86d42eb936e0000000000120e38 XMM08=cd913739828e06340000000000119ec8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000