syzkaller login: [ 31.746402] BUG: Bad rss-counter state mm:00000000667399cd type:MM_FILEPAGES val:33 [ 31.747679] BUG: Bad rss-counter state mm:00000000667399cd type:MM_ANONPAGES val:22 [ 31.910309] ================================================================== [ 31.911369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.912630] Read of size 8 at addr ffff88800e776880 by task sshd/221 [ 31.913536] [ 31.913790] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.914839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.915931] Call Trace: [ 31.916257] <TASK> [ 31.916538] dump_stack_lvl+0x91/0xf0 [ 31.917031] print_report+0xcc/0x620 [ 31.917510] ? __virt_addr_valid+0x102/0x340 [ 31.918062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.918699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919322] kasan_report+0xbe/0xf0 [ 31.919829] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920462] vma_interval_tree_remove+0xc75/0xec0 [ 31.921059] vma_prepare+0xc54/0x11a0 [ 31.921540] __split_vma+0x5af/0x950 [ 31.922008] ? __pfx___split_vma+0x10/0x10 [ 31.922558] ? find_held_lock+0x2c/0x110 [ 31.923077] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.923636] ? lock_is_held_type+0x9f/0x120 [ 31.924202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.924810] ? mtree_range_walk+0x632/0x900 [ 31.925358] ? mas_walk+0x5c7/0x7c0 [ 31.925840] do_vmi_munmap+0x1f1/0x2b0 [ 31.926362] mmap_region+0x1f9/0x2660 [ 31.926845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.928101] ? __pfx_lock_acquire+0x10/0x10 [ 31.928642] ? __pfx_mmap_region+0x10/0x10 [ 31.929173] ? security_mmap_addr+0x7d/0xa0 [ 31.929705] ? get_unmapped_area+0x1f5/0x3f0 [ 31.930267] do_mmap+0x854/0xf00 [ 31.930719] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.931220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.931812] ksys_mmap_pgoff+0x3af/0x500 [ 31.932325] do_syscall_64+0x3f/0x90 [ 31.932801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.933446] RIP: 0033:0x7f8aae3d2d82 [ 31.933945] 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 [ 31.936166] RSP: 002b:00007fff83d603a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.937077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8aae3d2d82 [ 31.937932] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8aad80c000 [ 31.938818] RBP: 00007f8aad80c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.939657] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561615572ec0 [ 31.940540] R13: 00007fff83d603c0 R14: 00007fff83d603f0 R15: 00007fff83d60750 [ 31.941403] </TASK> [ 31.941700] [ 31.941917] Allocated by task 214: [ 31.942364] kasan_save_stack+0x22/0x50 [ 31.942871] kasan_set_track+0x25/0x30 [ 31.943370] __kasan_slab_alloc+0x59/0x70 [ 31.943925] kmem_cache_alloc+0x16b/0x370 [ 31.944458] vm_area_dup+0x20/0x160 [ 31.944908] __split_vma+0x170/0x950 [ 31.945375] split_vma+0xc6/0x110 [ 31.945813] mprotect_fixup+0x8d2/0xb30 [ 31.946342] do_mprotect_pkey+0x87e/0xd40 [ 31.946856] __x64_sys_mprotect+0x78/0xc0 [ 31.947376] do_syscall_64+0x3f/0x90 [ 31.947909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.948557] [ 31.948775] Freed by task 214: [ 31.949164] kasan_save_stack+0x22/0x50 [ 31.949675] kasan_set_track+0x25/0x30 [ 31.950167] kasan_save_free_info+0x2b/0x50 [ 31.950716] __kasan_slab_free+0x10a/0x190 [ 31.951250] kmem_cache_free+0x10d/0x4d0 [ 31.951783] rcu_core+0x8c8/0x2860 [ 31.952255] __do_softirq+0x1b7/0x7d4 [ 31.952738] [ 31.952951] Last potentially related work creation: [ 31.953534] kasan_save_stack+0x22/0x50 [ 31.954046] __kasan_record_aux_stack+0x8e/0xa0 [ 31.954634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.955279] remove_vma+0x139/0x170 [ 31.955774] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.956361] do_vmi_munmap+0x1f1/0x2b0 [ 31.956847] __vm_munmap+0x138/0x3a0 [ 31.957310] __x64_sys_munmap+0x59/0x80 [ 31.957811] do_syscall_64+0x3f/0x90 [ 31.958349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.958999] [ 31.959214] Second to last potentially related work creation: [ 31.959931] kasan_save_stack+0x22/0x50 [ 31.960440] __kasan_record_aux_stack+0x8e/0xa0 [ 31.961016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.961655] remove_vma+0x139/0x170 [ 31.962107] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.962681] do_vmi_munmap+0x1f1/0x2b0 [ 31.963174] mmap_region+0x1f9/0x2660 [ 31.963650] do_mmap+0x854/0xf00 [ 31.964110] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.964605] ksys_mmap_pgoff+0x3af/0x500 [ 31.965108] do_syscall_64+0x3f/0x90 [ 31.965585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.966229] [ 31.966471] The buggy address belongs to the object at ffff88800e776828 [ 31.966471] which belongs to the cache vm_area_struct of size 168 [ 31.967975] The buggy address is located 88 bytes inside of [ 31.967975] freed 168-byte region [ffff88800e776828, ffff88800e7768d0) [ 31.969411] [ 31.969625] The buggy address belongs to the physical page: [ 31.970318] page:00000000ed2c0ad6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe776 [ 31.971419] memcg:ffff888009c9f901 [ 31.971886] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972540] page_type: 0xffffffff() [ 31.973004] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.973935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009c9f901 [ 31.974907] page dumped because: kasan: bad access detected [ 31.975574] [ 31.975817] Memory state around the buggy address: [ 31.976412] ffff88800e776780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.977281] ffff88800e776800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.978164] >ffff88800e776880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.979050] ^ [ 31.979468] ffff88800e776900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.980369] ffff88800e776980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.981241] ================================================================== [ 31.982339] Disabling lock debugging due to kernel taint [ 34.003499] BUG: Bad rss-counter state mm:000000000602eeef type:MM_FILEPAGES val:33 [ 34.004681] BUG: Bad rss-counter state mm:000000000602eeef type:MM_ANONPAGES val:22 [ 34.418033] BUG: Bad rss-counter state mm:000000001336cfd1 type:MM_FILEPAGES val:33 [ 34.419229] BUG: Bad rss-counter state mm:000000001336cfd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15543' (ECDSA) to the list of known hosts. 2023/06/21 04:37:55 fuzzer started 2023/06/21 04:37:56 dialing manager at localhost:36067 2023/06/21 04:37:56 checking machine... 2023/06/21 04:37:56 checking revisions... [ 35.113593] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:37:56 testing simple program... [ 35.175468] cgroup: Unknown subsys name 'net' [ 35.243669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:37:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f49c3fae000 RCX=ffffffff81007b82 RDX=00007f49c3fae000 RSI=ffffffffff600000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888016a3f5d8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f49c3fae000 R11=00000000000b6a61 R12=ffff888016a3f720 R13=0000000000000000 R14=ffff88800f4c0000 R15=0000000000092cc0 RIP=ffffffff814c0250 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 00007f49c3abb900 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=00007ffd87624000 CR3=000000000ea2a000 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=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 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=00007fa7d2bc1860 CR3=000000000df3c000 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=2035353a37333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000