syzkaller login: [ 38.672350] BUG: Bad rss-counter state mm:00000000e2011523 type:MM_FILEPAGES val:33 [ 38.673822] BUG: Bad rss-counter state mm:00000000e2011523 type:MM_ANONPAGES val:22 [ 38.830595] ================================================================== [ 38.831524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.832467] Read of size 8 at addr ffff88800e666310 by task sshd/218 [ 38.833246] [ 38.833468] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.834498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.835478] Call Trace: [ 38.835802] [ 38.836089] dump_stack_lvl+0x91/0xf0 [ 38.836599] print_report+0xcc/0x620 [ 38.837089] ? __virt_addr_valid+0x102/0x340 [ 38.837655] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838280] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838900] kasan_report+0xbe/0xf0 [ 38.839376] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840000] vma_interval_tree_remove+0xc75/0xec0 [ 38.840603] vma_prepare+0xc54/0x11a0 [ 38.841082] __split_vma+0x5af/0x950 [ 38.841572] ? __pfx___split_vma+0x10/0x10 [ 38.842102] ? find_held_lock+0x2c/0x110 [ 38.842634] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.843207] ? lock_is_held_type+0x9f/0x120 [ 38.843750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.844375] ? mtree_range_walk+0x632/0x900 [ 38.844936] ? mas_walk+0x5c7/0x7c0 [ 38.845442] do_vmi_munmap+0x1f1/0x2b0 [ 38.845943] mmap_region+0x1f9/0x2660 [ 38.846432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.846956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.847683] ? __pfx_lock_acquire+0x10/0x10 [ 38.848239] ? __pfx_mmap_region+0x10/0x10 [ 38.848776] ? security_mmap_addr+0x7d/0xa0 [ 38.849319] ? get_unmapped_area+0x1f5/0x3f0 [ 38.849875] do_mmap+0x854/0xf00 [ 38.850320] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.850820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.851386] ksys_mmap_pgoff+0x3af/0x500 [ 38.851896] do_syscall_64+0x3f/0x90 [ 38.852382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.853035] RIP: 0033:0x7fe645e9bd82 [ 38.853514] 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 [ 38.855678] RSP: 002b:00007ffc1fcb0338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.856600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe645e9bd82 [ 38.857461] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6452d5000 [ 38.858317] RBP: 00007fe6452d5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.859169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df1d126ec0 [ 38.860027] R13: 00007ffc1fcb0350 R14: 00007ffc1fcb0380 R15: 00007ffc1fcb06e0 [ 38.860887] [ 38.861182] [ 38.861419] Allocated by task 211: [ 38.861856] kasan_save_stack+0x22/0x50 [ 38.862369] kasan_set_track+0x25/0x30 [ 38.862877] __kasan_slab_alloc+0x59/0x70 [ 38.863411] kmem_cache_alloc+0x16b/0x370 [ 38.863938] vm_area_dup+0x20/0x160 [ 38.864402] __split_vma+0x170/0x950 [ 38.864874] split_vma+0xc6/0x110 [ 38.865329] mprotect_fixup+0x8d2/0xb30 [ 38.865839] do_mprotect_pkey+0x87e/0xd40 [ 38.866363] __x64_sys_mprotect+0x78/0xc0 [ 38.866900] do_syscall_64+0x3f/0x90 [ 38.867381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.868038] [ 38.868253] Freed by task 19: [ 38.868643] kasan_save_stack+0x22/0x50 [ 38.869150] kasan_set_track+0x25/0x30 [ 38.869671] kasan_save_free_info+0x2b/0x50 [ 38.870209] __kasan_slab_free+0x10a/0x190 [ 38.870757] kmem_cache_free+0x10d/0x4d0 [ 38.871273] rcu_core+0x8c8/0x2860 [ 38.871727] __do_softirq+0x1b7/0x7d4 [ 38.872207] [ 38.872424] Last potentially related work creation: [ 38.873033] kasan_save_stack+0x22/0x50 [ 38.873556] __kasan_record_aux_stack+0x8e/0xa0 [ 38.874133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.874877] remove_vma+0x139/0x170 [ 38.875347] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.875912] do_vmi_munmap+0x1f1/0x2b0 [ 38.876397] __vm_munmap+0x138/0x3a0 [ 38.876868] __x64_sys_munmap+0x59/0x80 [ 38.877386] do_syscall_64+0x3f/0x90 [ 38.877867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878533] [ 38.878753] Second to last potentially related work creation: [ 38.879443] kasan_save_stack+0x22/0x50 [ 38.879951] __kasan_record_aux_stack+0x8e/0xa0 [ 38.880533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.881191] remove_vma+0x139/0x170 [ 38.881646] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.882209] do_vmi_munmap+0x1f1/0x2b0 [ 38.882707] __vm_munmap+0x138/0x3a0 [ 38.883185] __x64_sys_munmap+0x59/0x80 [ 38.883691] do_syscall_64+0x3f/0x90 [ 38.884174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884828] [ 38.885044] The buggy address belongs to the object at ffff88800e6662b8 [ 38.885044] which belongs to the cache vm_area_struct of size 168 [ 38.886545] The buggy address is located 88 bytes inside of [ 38.886545] freed 168-byte region [ffff88800e6662b8, ffff88800e666360) [ 38.887982] [ 38.888201] The buggy address belongs to the physical page: [ 38.888872] page:000000008b833b81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe666 [ 38.889991] memcg:ffff88800dec5f01 [ 38.890416] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.891129] page_type: 0xffffffff() [ 38.891587] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390440 dead000000000007 [ 38.892525] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec5f01 [ 38.893448] page dumped because: kasan: bad access detected [ 38.894118] [ 38.894341] Memory state around the buggy address: [ 38.894922] ffff88800e666200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.895793] ffff88800e666280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.896660] >ffff88800e666300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.897539] ^ [ 38.898011] ffff88800e666380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.898869] ffff88800e666400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.899724] ================================================================== [ 38.900724] Disabling lock debugging due to kernel taint [ 41.256060] BUG: Bad rss-counter state mm:000000009c253f8d type:MM_FILEPAGES val:33 [ 41.257213] BUG: Bad rss-counter state mm:000000009c253f8d type:MM_ANONPAGES val:22 [ 41.656644] BUG: Bad rss-counter state mm:00000000bb09abed type:MM_FILEPAGES val:33 [ 41.657666] BUG: Bad rss-counter state mm:00000000bb09abed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54662' (ECDSA) to the list of known hosts. 2023/06/21 04:48:20 fuzzer started 2023/06/21 04:48:20 dialing manager at localhost:36067 2023/06/21 04:48:20 checking machine... 2023/06/21 04:48:20 checking revisions... [ 42.366348] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:48:21 testing simple program... [ 42.415026] cgroup: Unknown subsys name 'net' [ 42.489756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:48:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818d9891 RDX=0000000000008d98 RSI=0000000000008d98 RDI=ffffffff8650d050 RBP=ffff88801031fad8 RSP=ffff88801031fa10 R8 =0000000000000000 R9 =ffff88801031fac0 R10=0000000000038001 R11=0000000000038c51 R12=ffff88801031fae0 R13=ffff88801031fac8 R14=ffff88801031fac1 R15=ffff88801031fa80 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f22af9ec900 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=00007ffd9bd89000 CR3=000000000f4d6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810711 RSP=ffff88806cf09dd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff88801a312d90 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 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=00007f4dd8082000 CR3=00000000147a2000 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=2030323a38343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a38343a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000