syzkaller login: [ 30.671385] BUG: Bad rss-counter state mm:00000000b92e407f type:MM_FILEPAGES val:33 [ 30.672568] BUG: Bad rss-counter state mm:00000000b92e407f type:MM_ANONPAGES val:22 [ 30.819843] ================================================================== [ 30.820736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.821709] Read of size 8 at addr ffff88801a3d8058 by task sshd/220 [ 30.822498] [ 30.822725] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.823755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.824757] Call Trace: [ 30.825105] [ 30.825408] dump_stack_lvl+0x91/0xf0 [ 30.825935] print_report+0xcc/0x620 [ 30.826426] ? __virt_addr_valid+0x102/0x340 [ 30.826995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828276] kasan_report+0xbe/0xf0 [ 30.828758] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829406] vma_interval_tree_remove+0xc75/0xec0 [ 30.830010] vma_prepare+0xc54/0x11a0 [ 30.830491] __split_vma+0x5af/0x950 [ 30.830968] ? __pfx___split_vma+0x10/0x10 [ 30.831496] ? find_held_lock+0x2c/0x110 [ 30.832021] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.832584] ? lock_is_held_type+0x9f/0x120 [ 30.833149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.833757] ? mtree_range_walk+0x632/0x900 [ 30.834329] ? mas_walk+0x5c7/0x7c0 [ 30.834811] do_vmi_munmap+0x1f1/0x2b0 [ 30.835305] mmap_region+0x1f9/0x2660 [ 30.835796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.836325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.837047] ? __pfx_lock_acquire+0x10/0x10 [ 30.837579] ? __pfx_mmap_region+0x10/0x10 [ 30.838116] ? security_mmap_addr+0x7d/0xa0 [ 30.838650] ? get_unmapped_area+0x1f5/0x3f0 [ 30.839213] do_mmap+0x854/0xf00 [ 30.839677] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.840183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.840753] ksys_mmap_pgoff+0x3af/0x500 [ 30.841287] do_syscall_64+0x3f/0x90 [ 30.841771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842433] RIP: 0033:0x7f1c93698d82 [ 30.842892] 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 [ 30.845071] RSP: 002b:00007ffeb2fcd3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.845980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c93698d82 [ 30.846841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c92ad2000 [ 30.847693] RBP: 00007f1c92ad2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.848547] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8d5a1cd90 [ 30.849413] R13: 00007ffeb2fcd3e0 R14: 00007ffeb2fcd410 R15: 00007ffeb2fcd770 [ 30.850273] [ 30.850562] [ 30.850781] Allocated by task 213: [ 30.851209] kasan_save_stack+0x22/0x50 [ 30.851724] kasan_set_track+0x25/0x30 [ 30.852232] __kasan_slab_alloc+0x59/0x70 [ 30.852760] kmem_cache_alloc+0x16b/0x370 [ 30.853296] vm_area_dup+0x20/0x160 [ 30.853761] __split_vma+0x170/0x950 [ 30.854242] split_vma+0xc6/0x110 [ 30.854685] mprotect_fixup+0x8d2/0xb30 [ 30.855190] do_mprotect_pkey+0x87e/0xd40 [ 30.855714] __x64_sys_mprotect+0x78/0xc0 [ 30.856234] do_syscall_64+0x3f/0x90 [ 30.856721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857386] [ 30.857604] Freed by task 213: [ 30.858001] kasan_save_stack+0x22/0x50 [ 30.858508] kasan_set_track+0x25/0x30 [ 30.859007] kasan_save_free_info+0x2b/0x50 [ 30.859538] __kasan_slab_free+0x10a/0x190 [ 30.860074] kmem_cache_free+0x10d/0x4d0 [ 30.860587] rcu_core+0x8c8/0x2860 [ 30.861052] __do_softirq+0x1b7/0x7d4 [ 30.861544] [ 30.861763] Last potentially related work creation: [ 30.862367] kasan_save_stack+0x22/0x50 [ 30.862868] __kasan_record_aux_stack+0x8e/0xa0 [ 30.863451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.864123] remove_vma+0x139/0x170 [ 30.864658] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865230] do_vmi_munmap+0x1f1/0x2b0 [ 30.865724] __vm_munmap+0x138/0x3a0 [ 30.866198] __x64_sys_munmap+0x59/0x80 [ 30.866700] do_syscall_64+0x3f/0x90 [ 30.867180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867823] [ 30.868038] The buggy address belongs to the object at ffff88801a3d8000 [ 30.868038] which belongs to the cache vm_area_struct of size 168 [ 30.869558] The buggy address is located 88 bytes inside of [ 30.869558] freed 168-byte region [ffff88801a3d8000, ffff88801a3d80a8) [ 30.870977] [ 30.871191] The buggy address belongs to the physical page: [ 30.871856] page:00000000b0ce0bf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3d8 [ 30.872957] memcg:ffff88801461c601 [ 30.873387] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.874039] page_type: 0xffffffff() [ 30.874502] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.875421] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801461c601 [ 30.876331] page dumped because: kasan: bad access detected [ 30.877013] [ 30.877228] Memory state around the buggy address: [ 30.877817] ffff88801a3d7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.878677] ffff88801a3d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.879531] >ffff88801a3d8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.880384] ^ [ 30.881127] ffff88801a3d8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.881983] ffff88801a3d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.882857] ================================================================== [ 30.883788] Disabling lock debugging due to kernel taint [ 33.735551] BUG: Bad rss-counter state mm:00000000cb9c94d3 type:MM_FILEPAGES val:33 [ 33.736612] BUG: Bad rss-counter state mm:00000000cb9c94d3 type:MM_ANONPAGES val:22 [ 34.316099] BUG: Bad rss-counter state mm:0000000042c9662e type:MM_FILEPAGES val:33 [ 34.317369] BUG: Bad rss-counter state mm:0000000042c9662e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37723' (ECDSA) to the list of known hosts. 2023/06/20 20:10:01 fuzzer started 2023/06/20 20:10:01 dialing manager at localhost:36067 2023/06/20 20:10:01 checking machine... 2023/06/20 20:10:01 checking revisions... [ 35.050552] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:10:02 testing simple program... [ 35.103226] cgroup: Unknown subsys name 'net' [ 35.144485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c139e RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806ce09cd8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007fa1c9af1900 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=00007ffc5a5bf000 CR3=000000000cafa000 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=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 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=0000000000000001 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=00007efeb6c1ff20 CR3=0000000008c6e000 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=09d948e20cb86b806d42902549215a15 XMM02=000000000011d9c8eff9b2d0a8fce9cb XMM03=000000000011da982c67c8bc2e329bc3 XMM04=6eb76c86abf9a70300000000000ae988 XMM05=0b5ae1898524c27200000000001321a8 XMM06=4fda316b135da52b0000000000131e30 XMM07=e042d86d42eb936e0000000000122348 XMM08=e9880c440e88217b000000000011da98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000