syzkaller login: [ 28.718899] BUG: Bad rss-counter state mm:00000000826e9b3a type:MM_FILEPAGES val:33 [ 28.719915] BUG: Bad rss-counter state mm:00000000826e9b3a type:MM_ANONPAGES val:22 [ 28.892798] ================================================================== [ 28.893905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.895099] Read of size 8 at addr ffff88801658edf0 by task sshd/220 [ 28.895855] [ 28.896069] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.896925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.897886] Call Trace: [ 28.898202] [ 28.898482] dump_stack_lvl+0x91/0xf0 [ 28.898979] print_report+0xcc/0x620 [ 28.899458] ? __virt_addr_valid+0x102/0x340 [ 28.899998] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900606] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901215] kasan_report+0xbe/0xf0 [ 28.901692] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902300] vma_interval_tree_remove+0xc75/0xec0 [ 28.902917] vma_prepare+0xc54/0x11a0 [ 28.903389] __split_vma+0x5af/0x950 [ 28.903860] ? __pfx___split_vma+0x10/0x10 [ 28.904384] ? find_held_lock+0x2c/0x110 [ 28.904903] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.905468] ? lock_is_held_type+0x9f/0x120 [ 28.906000] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.906600] ? mtree_range_walk+0x632/0x900 [ 28.907159] ? mas_walk+0x5c7/0x7c0 [ 28.907627] do_vmi_munmap+0x1f1/0x2b0 [ 28.908118] mmap_region+0x1f9/0x2660 [ 28.908596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.909105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.909808] ? __pfx_lock_acquire+0x10/0x10 [ 28.910337] ? __pfx_mmap_region+0x10/0x10 [ 28.910867] ? security_mmap_addr+0x7d/0xa0 [ 28.911391] ? get_unmapped_area+0x1f5/0x3f0 [ 28.911932] do_mmap+0x854/0xf00 [ 28.912368] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.912858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.913416] ksys_mmap_pgoff+0x3af/0x500 [ 28.913915] do_syscall_64+0x3f/0x90 [ 28.914395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915063] RIP: 0033:0x7fa56971cd82 [ 28.915521] 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 [ 28.917612] RSP: 002b:00007ffdec320e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.918503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa56971cd82 [ 28.919361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa568b56000 [ 28.920199] RBP: 00007fa568b56000 R08: 0000000000000009 R09: 0000000000001000 [ 28.921044] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d2c960d90 [ 28.921878] R13: 00007ffdec320e40 R14: 00007ffdec320e70 R15: 00007ffdec3211d0 [ 28.922730] [ 28.923033] [ 28.923245] Allocated by task 213: [ 28.923669] kasan_save_stack+0x22/0x50 [ 28.924164] kasan_set_track+0x25/0x30 [ 28.924651] __kasan_slab_alloc+0x59/0x70 [ 28.925163] kmem_cache_alloc+0x16b/0x370 [ 28.925671] vm_area_dup+0x20/0x160 [ 28.926116] __split_vma+0x170/0x950 [ 28.926580] split_vma+0xc6/0x110 [ 28.927027] mprotect_fixup+0x8d2/0xb30 [ 28.927524] do_mprotect_pkey+0x87e/0xd40 [ 28.928040] __x64_sys_mprotect+0x78/0xc0 [ 28.928554] do_syscall_64+0x3f/0x90 [ 28.929023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929655] [ 28.929867] Freed by task 213: [ 28.930254] kasan_save_stack+0x22/0x50 [ 28.930748] kasan_set_track+0x25/0x30 [ 28.931264] kasan_save_free_info+0x2b/0x50 [ 28.931790] __kasan_slab_free+0x10a/0x190 [ 28.932315] kmem_cache_free+0x10d/0x4d0 [ 28.932815] rcu_core+0x8c8/0x2860 [ 28.933249] __do_softirq+0x1b7/0x7d4 [ 28.933717] [ 28.933929] Last potentially related work creation: [ 28.934499] kasan_save_stack+0x22/0x50 [ 28.935017] __kasan_record_aux_stack+0x8e/0xa0 [ 28.935583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.936219] remove_vma+0x139/0x170 [ 28.936664] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.937207] do_vmi_munmap+0x1f1/0x2b0 [ 28.937686] __vm_munmap+0x138/0x3a0 [ 28.938143] __x64_sys_munmap+0x59/0x80 [ 28.938631] do_syscall_64+0x3f/0x90 [ 28.939108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.939744] [ 28.939954] The buggy address belongs to the object at ffff88801658ed98 [ 28.939954] which belongs to the cache vm_area_struct of size 168 [ 28.941403] The buggy address is located 88 bytes inside of [ 28.941403] freed 168-byte region [ffff88801658ed98, ffff88801658ee40) [ 28.942815] [ 28.943062] The buggy address belongs to the physical page: [ 28.943718] page:0000000087e9df7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1658e [ 28.944808] memcg:ffff8880164c1501 [ 28.945231] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.945877] page_type: 0xffffffff() [ 28.946330] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.947260] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164c1501 [ 28.948164] page dumped because: kasan: bad access detected [ 28.948815] [ 28.949032] Memory state around the buggy address: [ 28.949615] ffff88801658ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.950463] ffff88801658ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.951327] >ffff88801658ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.952175] ^ [ 28.952981] ffff88801658ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.953835] ffff88801658ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.954683] ================================================================== [ 28.955744] Disabling lock debugging due to kernel taint [ 30.958296] BUG: Bad rss-counter state mm:00000000311d7f86 type:MM_FILEPAGES val:33 [ 30.959264] BUG: Bad rss-counter state mm:00000000311d7f86 type:MM_ANONPAGES val:22 [ 31.448806] BUG: Bad rss-counter state mm:0000000055989b72 type:MM_FILEPAGES val:33 [ 31.450358] BUG: Bad rss-counter state mm:0000000055989b72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22525' (ECDSA) to the list of known hosts. 2023/06/21 00:17:47 fuzzer started 2023/06/21 00:17:47 dialing manager at localhost:36067 2023/06/21 00:17:47 checking machine... 2023/06/21 00:17:47 checking revisions... [ 32.102248] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:17:47 testing simple program... [ 32.157871] cgroup: Unknown subsys name 'net' [ 32.196093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:46 Registers: info registers vcpu 0 RAX=ffff88806ce3de00 RBX=ffff88801353a720 RCX=ffff88800cf2d850 RDX=ffff88800cf2d850 RSI=ffffea000033cb40 RDI=ffff88800844f780 RBP=ffff88801439f618 RSP=ffff88801439f610 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea000033cb40 R11=00000000000d0008 R12=dffffc0000000000 R13=ffff88801439f668 R14=ffff88800844f780 R15=ffff88800cf2d850 RIP=ffffffff818095e6 RFL=00000206 [-----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 00007f90a6849900 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=00007f90a5ccecb0 CR3=000000000da18000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fc6ec94c64d0b16c00000000000ae988 XMM05=345ce903f24937340000000000132910 XMM06=4fda316b135da52b0000000000131700 XMM07=fb795ef6d657705600000000001219c8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81370a8a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001cd3f10 RSI=ffffffff81370a8a RDI=ffff88800e69f8f0 RBP=ffff88800e69f8c0 RSP=ffff88800e69f820 R8 =0000000000000001 R9 =ffff88800e69f868 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88800e69f8f0 R13=0000000000000000 R14=ffff8880169451c0 R15=0000000000000002 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fa280dd0900 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=00007fa280d9f008 CR3=0000000019bb8000 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=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