syzkaller login: [ 60.784942] BUG: Bad rss-counter state mm:00000000c926a480 type:MM_FILEPAGES val:33 [ 60.786628] BUG: Bad rss-counter state mm:00000000c926a480 type:MM_ANONPAGES val:22 [ 60.930331] ================================================================== [ 60.931300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.932270] Read of size 8 at addr ffff88800edffd08 by task sshd/221 [ 60.933171] [ 60.933407] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.934303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.935327] Call Trace: [ 60.935655] [ 60.935963] dump_stack_lvl+0x91/0xf0 [ 60.936479] print_report+0xcc/0x620 [ 60.937012] ? __virt_addr_valid+0x102/0x340 [ 60.937597] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.938260] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.938903] kasan_report+0xbe/0xf0 [ 60.939416] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.940089] vma_interval_tree_remove+0xc75/0xec0 [ 60.940761] vma_prepare+0xc54/0x11a0 [ 60.941290] __split_vma+0x5af/0x950 [ 60.941817] ? __pfx___split_vma+0x10/0x10 [ 60.942406] ? find_held_lock+0x2c/0x110 [ 60.942984] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.943618] ? lock_is_held_type+0x9f/0x120 [ 60.944215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.944894] ? mtree_range_walk+0x632/0x900 [ 60.945503] ? mas_walk+0x5c7/0x7c0 [ 60.946080] do_vmi_munmap+0x1f1/0x2b0 [ 60.946632] mmap_region+0x1f9/0x2660 [ 60.947171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.947735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.948547] ? __pfx_lock_acquire+0x10/0x10 [ 60.949146] ? __pfx_mmap_region+0x10/0x10 [ 60.949742] ? security_mmap_addr+0x7d/0xa0 [ 60.950332] ? get_unmapped_area+0x1f5/0x3f0 [ 60.950947] do_mmap+0x854/0xf00 [ 60.951451] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.952000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.952634] ksys_mmap_pgoff+0x3af/0x500 [ 60.953210] do_syscall_64+0x3f/0x90 [ 60.953765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.954710] RIP: 0033:0x7fec53e67d82 [ 60.955382] 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 [ 60.957918] RSP: 002b:00007ffc83354958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.958962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec53e67d82 [ 60.959944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec532a1000 [ 60.960966] RBP: 00007fec532a1000 R08: 0000000000000009 R09: 0000000000001000 [ 60.961954] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d255d4980 [ 60.962929] R13: 00007ffc83354970 R14: 00007ffc833549a0 R15: 00007ffc83354d00 [ 60.963932] [ 60.964263] [ 60.964517] Allocated by task 214: [ 60.965045] kasan_save_stack+0x22/0x50 [ 60.965622] kasan_set_track+0x25/0x30 [ 60.966209] __kasan_slab_alloc+0x59/0x70 [ 60.966807] kmem_cache_alloc+0x16b/0x370 [ 60.967393] vm_area_dup+0x20/0x160 [ 60.967898] __split_vma+0x170/0x950 [ 60.968427] split_vma+0xc6/0x110 [ 60.968951] mprotect_fixup+0x8d2/0xb30 [ 60.969530] do_mprotect_pkey+0x87e/0xd40 [ 60.970124] __x64_sys_mprotect+0x78/0xc0 [ 60.970725] do_syscall_64+0x3f/0x90 [ 60.971270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.972015] [ 60.972261] Freed by task 204: [ 60.972721] kasan_save_stack+0x22/0x50 [ 60.973300] kasan_set_track+0x25/0x30 [ 60.973869] kasan_save_free_info+0x2b/0x50 [ 60.974480] __kasan_slab_free+0x10a/0x190 [ 60.975084] kmem_cache_free+0x10d/0x4d0 [ 60.975671] rcu_core+0x8c8/0x2860 [ 60.976183] __do_softirq+0x1b7/0x7d4 [ 60.976748] [ 60.976994] Last potentially related work creation: [ 60.977668] kasan_save_stack+0x22/0x50 [ 60.978243] __kasan_record_aux_stack+0x8e/0xa0 [ 60.978897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.979634] remove_vma+0x139/0x170 [ 60.980156] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.980806] do_vmi_munmap+0x1f1/0x2b0 [ 60.981379] __vm_munmap+0x138/0x3a0 [ 60.981916] __x64_sys_munmap+0x59/0x80 [ 60.982495] do_syscall_64+0x3f/0x90 [ 60.983050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.983794] [ 60.984042] The buggy address belongs to the object at ffff88800edffcb0 [ 60.984042] which belongs to the cache vm_area_struct of size 168 [ 60.985760] The buggy address is located 88 bytes inside of [ 60.985760] freed 168-byte region [ffff88800edffcb0, ffff88800edffd58) [ 60.987312] [ 60.987532] The buggy address belongs to the physical page: [ 60.988213] page:00000000708af239 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedff [ 60.989356] memcg:ffff888019750c01 [ 60.989800] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.990481] page_type: 0xffffffff() [ 60.990938] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.991887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019750c01 [ 60.992844] page dumped because: kasan: bad access detected [ 60.993536] [ 60.993761] Memory state around the buggy address: [ 60.994356] ffff88800edffc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 60.995244] ffff88800edffc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.996132] >ffff88800edffd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.997029] ^ [ 60.997489] ffff88800edffd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.998383] ffff88800edffe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.999276] ================================================================== [ 61.000437] Disabling lock debugging due to kernel taint [ 62.907416] BUG: Bad rss-counter state mm:0000000059357668 type:MM_FILEPAGES val:33 [ 62.908210] BUG: Bad rss-counter state mm:0000000059357668 type:MM_ANONPAGES val:22 [ 63.378584] BUG: Bad rss-counter state mm:00000000a9fc9c26 type:MM_FILEPAGES val:33 [ 63.380317] BUG: Bad rss-counter state mm:00000000a9fc9c26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50968' (ECDSA) to the list of known hosts. 2023/06/21 00:56:25 fuzzer started 2023/06/21 00:56:25 dialing manager at localhost:36067 2023/06/21 00:56:25 checking machine... 2023/06/21 00:56:25 checking revisions... [ 64.099610] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:56:25 testing simple program... [ 64.146120] cgroup: Unknown subsys name 'net' [ 64.197315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:24 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff888009463680 RCX=ffffea0000251881 RDX=ffffea0000251880 RSI=ffff888019519e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888009c0fbc8 R8 =ffff888009463680 R9 =0000000000000000 R10=ffffea0000654640 R11=00000000800d000b R12=dffffc0000000000 R13=ffff888009c0fc08 R14=0000000000000000 R15=ffff888019519e40 RIP=ffffffff818103a7 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 00007f2f280f4900 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=00007f2f286a9650 CR3=000000001b966000 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=00007f1d0c8926c0 CR3=000000000d626000 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=2faf9a739e3df19e174352dcf25cd7a3 XMM02=ec2efd57dc4c00df000000000011a168 XMM03=e5aaf2909a678c09000000000011a238 XMM04=81aec8b3d8bd5a4300000000000ae988 XMM05=e4cb8bb95a7664b600000000001318d8 XMM06=261744ae86a76d5d0000000000130740 XMM07=e042d86d42eb936e0000000000121d00 XMM08=e5aaf2909a678c09000000000011a238 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000