syzkaller login: [ 40.337020] BUG: Bad rss-counter state mm:00000000da3bc2b9 type:MM_FILEPAGES val:33 [ 40.338373] BUG: Bad rss-counter state mm:00000000da3bc2b9 type:MM_ANONPAGES val:22 [ 40.482429] ================================================================== [ 40.483562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.484512] Read of size 8 at addr ffff888019611b38 by task sshd/224 [ 40.485393] [ 40.485621] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.486501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.487497] Call Trace: [ 40.487821] [ 40.488110] dump_stack_lvl+0x91/0xf0 [ 40.488601] print_report+0xcc/0x620 [ 40.489094] ? __virt_addr_valid+0x102/0x340 [ 40.489654] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.490277] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.490898] kasan_report+0xbe/0xf0 [ 40.491386] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.492020] vma_interval_tree_remove+0xc75/0xec0 [ 40.492636] vma_prepare+0xc54/0x11a0 [ 40.493120] __split_vma+0x5af/0x950 [ 40.493605] ? __pfx___split_vma+0x10/0x10 [ 40.494133] ? find_held_lock+0x2c/0x110 [ 40.494660] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.495258] ? lock_is_held_type+0x9f/0x120 [ 40.495806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.496412] ? mtree_range_walk+0x632/0x900 [ 40.496964] ? mas_walk+0x5c7/0x7c0 [ 40.497440] do_vmi_munmap+0x1f1/0x2b0 [ 40.497937] mmap_region+0x1f9/0x2660 [ 40.498417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.498929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.499652] ? __pfx_lock_acquire+0x10/0x10 [ 40.500188] ? __pfx_mmap_region+0x10/0x10 [ 40.500718] ? security_mmap_addr+0x7d/0xa0 [ 40.501249] ? get_unmapped_area+0x1f5/0x3f0 [ 40.501799] do_mmap+0x854/0xf00 [ 40.502236] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.502731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.503303] ksys_mmap_pgoff+0x3af/0x500 [ 40.503818] do_syscall_64+0x3f/0x90 [ 40.504297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.504938] RIP: 0033:0x7f8ce88ced82 [ 40.505397] 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 [ 40.507551] RSP: 002b:00007ffe7eafc2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.508458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ce88ced82 [ 40.509308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ce7d08000 [ 40.510157] RBP: 00007f8ce7d08000 R08: 0000000000000009 R09: 0000000000001000 [ 40.511002] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e2dc7aec0 [ 40.511865] R13: 00007ffe7eafc2e0 R14: 00007ffe7eafc310 R15: 00007ffe7eafc670 [ 40.512721] [ 40.513012] [ 40.513230] Allocated by task 217: [ 40.513664] kasan_save_stack+0x22/0x50 [ 40.514170] kasan_set_track+0x25/0x30 [ 40.514662] __kasan_slab_alloc+0x59/0x70 [ 40.515193] kmem_cache_alloc+0x16b/0x370 [ 40.515744] vm_area_dup+0x20/0x160 [ 40.516196] __split_vma+0x170/0x950 [ 40.516666] split_vma+0xc6/0x110 [ 40.517110] mprotect_fixup+0x8d2/0xb30 [ 40.517616] do_mprotect_pkey+0x87e/0xd40 [ 40.518137] __x64_sys_mprotect+0x78/0xc0 [ 40.518656] do_syscall_64+0x3f/0x90 [ 40.519128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.519791] [ 40.520006] Freed by task 204: [ 40.520410] kasan_save_stack+0x22/0x50 [ 40.520924] kasan_set_track+0x25/0x30 [ 40.521416] kasan_save_free_info+0x2b/0x50 [ 40.521950] __kasan_slab_free+0x10a/0x190 [ 40.522485] kmem_cache_free+0x10d/0x4d0 [ 40.522995] rcu_core+0x8c8/0x2860 [ 40.523455] __do_softirq+0x1b7/0x7d4 [ 40.523931] [ 40.524150] Last potentially related work creation: [ 40.524737] kasan_save_stack+0x22/0x50 [ 40.525247] __kasan_record_aux_stack+0x8e/0xa0 [ 40.525822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.526478] remove_vma+0x139/0x170 [ 40.526938] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.527527] do_vmi_munmap+0x1f1/0x2b0 [ 40.528018] __vm_munmap+0x138/0x3a0 [ 40.528487] __x64_sys_munmap+0x59/0x80 [ 40.528987] do_syscall_64+0x3f/0x90 [ 40.529466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.530113] [ 40.530327] The buggy address belongs to the object at ffff888019611ae0 [ 40.530327] which belongs to the cache vm_area_struct of size 168 [ 40.531804] The buggy address is located 88 bytes inside of [ 40.531804] freed 168-byte region [ffff888019611ae0, ffff888019611b88) [ 40.533209] [ 40.533425] The buggy address belongs to the physical page: [ 40.534078] page:00000000386e65ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19611 [ 40.535169] memcg:ffff8880196dd201 [ 40.535611] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.536254] page_type: 0xffffffff() [ 40.536706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.537627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196dd201 [ 40.538539] page dumped because: kasan: bad access detected [ 40.539198] [ 40.539433] Memory state around the buggy address: [ 40.540009] ffff888019611a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.540868] ffff888019611a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.541728] >ffff888019611b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.542597] ^ [ 40.543207] ffff888019611b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.544077] ffff888019611c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.544946] ================================================================== [ 40.546279] Disabling lock debugging due to kernel taint [ 43.036279] BUG: Bad rss-counter state mm:00000000a34d79e7 type:MM_FILEPAGES val:33 [ 43.037829] BUG: Bad rss-counter state mm:00000000a34d79e7 type:MM_ANONPAGES val:22 [ 43.463407] BUG: Bad rss-counter state mm:0000000013049b2d type:MM_FILEPAGES val:33 [ 43.464333] BUG: Bad rss-counter state mm:0000000013049b2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62978' (ECDSA) to the list of known hosts. 2023/06/19 14:14:15 fuzzer started 2023/06/19 14:14:16 dialing manager at localhost:44161 2023/06/19 14:14:16 checking machine... 2023/06/19 14:14:16 checking revisions... [ 44.141787] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:14:16 testing simple program... [ 44.187345] cgroup: Unknown subsys name 'net' [ 44.243576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f4e4707a240 CR3=000000000ca94000 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=972ea7de2229eeb6cb4109558f3066b3 XMM02=ec2efd57dc4c00df000000000011e438 XMM03=066d9f294f0d3486000000000011e508 XMM04=22846ed6037849ba00000000000ae988 XMM05=e7a3b750822471340000000000134918 XMM06=87a34aa867bc27e50000000000133780 XMM07=e042d86d42eb936e00000000001249a8 XMM08=066d9f294f0d3486000000000011e508 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016f60001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016f5f901 RSI=ffff888016f5f938 RDI=ffff888016f5f3b8 RBP=ffff888016f5f400 RSP=ffff888016f5f338 R8 =ffffffff863b6674 R9 =ffff888016f5f3e8 R10=0000000000038001 R11=000000000008b5c6 R12=ffff888016f5f408 R13=ffff888016f5f3f0 R14=ffff888016f5f940 R15=ffff888016f5f3a8 RIP=ffffffff81131039 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 00007f62f298a900 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=00007ffc916dc000 CR3=000000000e84c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000