syzkaller login: [ 61.273597] BUG: Bad rss-counter state mm:0000000053f8824e type:MM_FILEPAGES val:33 [ 61.275276] BUG: Bad rss-counter state mm:0000000053f8824e type:MM_ANONPAGES val:22 [ 61.437226] ================================================================== [ 61.438312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.439440] Read of size 8 at addr ffff88800eefec20 by task sshd/220 [ 61.440502] [ 61.440765] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.441795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.442970] Call Trace: [ 61.443309] [ 61.443605] dump_stack_lvl+0x91/0xf0 [ 61.444100] print_report+0xcc/0x620 [ 61.444592] ? __virt_addr_valid+0x102/0x340 [ 61.445144] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.445770] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.446399] kasan_report+0xbe/0xf0 [ 61.446883] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.447528] vma_interval_tree_remove+0xc75/0xec0 [ 61.448136] vma_prepare+0xc54/0x11a0 [ 61.448617] __split_vma+0x5af/0x950 [ 61.449094] ? __pfx___split_vma+0x10/0x10 [ 61.449625] ? find_held_lock+0x2c/0x110 [ 61.450147] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.450721] ? lock_is_held_type+0x9f/0x120 [ 61.451263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.451900] ? mtree_range_walk+0x632/0x900 [ 61.452459] ? mas_walk+0x5c7/0x7c0 [ 61.452946] do_vmi_munmap+0x1f1/0x2b0 [ 61.453443] mmap_region+0x1f9/0x2660 [ 61.453924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.454450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.455170] ? __pfx_lock_acquire+0x10/0x10 [ 61.455720] ? __pfx_mmap_region+0x10/0x10 [ 61.456267] ? security_mmap_addr+0x7d/0xa0 [ 61.456801] ? get_unmapped_area+0x1f5/0x3f0 [ 61.457373] do_mmap+0x854/0xf00 [ 61.457813] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.458317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.458888] ksys_mmap_pgoff+0x3af/0x500 [ 61.459422] do_syscall_64+0x3f/0x90 [ 61.459912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.460564] RIP: 0033:0x7fabca1e2d82 [ 61.461033] 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 [ 61.463208] RSP: 002b:00007fff33b2e798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.464151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabca1e2d82 [ 61.465028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabc961c000 [ 61.465893] RBP: 00007fabc961c000 R08: 0000000000000009 R09: 0000000000001000 [ 61.466760] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648d9ce6ec0 [ 61.467646] R13: 00007fff33b2e7b0 R14: 00007fff33b2e7e0 R15: 00007fff33b2eb40 [ 61.468527] [ 61.468822] [ 61.469044] Allocated by task 213: [ 61.469481] kasan_save_stack+0x22/0x50 [ 61.469993] kasan_set_track+0x25/0x30 [ 61.470504] __kasan_slab_alloc+0x59/0x70 [ 61.471038] kmem_cache_alloc+0x16b/0x370 [ 61.471587] vm_area_dup+0x20/0x160 [ 61.472044] __split_vma+0x170/0x950 [ 61.472516] split_vma+0xc6/0x110 [ 61.472966] mprotect_fixup+0x8d2/0xb30 [ 61.473472] do_mprotect_pkey+0x87e/0xd40 [ 61.473993] __x64_sys_mprotect+0x78/0xc0 [ 61.474524] do_syscall_64+0x3f/0x90 [ 61.475007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.475667] [ 61.475884] Freed by task 213: [ 61.476279] kasan_save_stack+0x22/0x50 [ 61.476794] kasan_set_track+0x25/0x30 [ 61.477297] kasan_save_free_info+0x2b/0x50 [ 61.477830] __kasan_slab_free+0x10a/0x190 [ 61.478372] kmem_cache_free+0x10d/0x4d0 [ 61.478883] rcu_core+0x8c8/0x2860 [ 61.479336] __do_softirq+0x1b7/0x7d4 [ 61.479831] [ 61.480047] Last potentially related work creation: [ 61.480646] kasan_save_stack+0x22/0x50 [ 61.481151] __kasan_record_aux_stack+0x8e/0xa0 [ 61.481848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.482563] remove_vma+0x139/0x170 [ 61.483109] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.483801] do_vmi_munmap+0x1f1/0x2b0 [ 61.484393] __vm_munmap+0x138/0x3a0 [ 61.484962] __x64_sys_munmap+0x59/0x80 [ 61.485574] do_syscall_64+0x3f/0x90 [ 61.486149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.486938] [ 61.487203] The buggy address belongs to the object at ffff88800eefebc8 [ 61.487203] which belongs to the cache vm_area_struct of size 168 [ 61.489001] The buggy address is located 88 bytes inside of [ 61.489001] freed 168-byte region [ffff88800eefebc8, ffff88800eefec70) [ 61.490689] [ 61.490949] The buggy address belongs to the physical page: [ 61.491760] page:00000000df4779ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeefe [ 61.493067] memcg:ffff88800c5b5801 [ 61.493585] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.494368] page_type: 0xffffffff() [ 61.494919] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.496048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5b5801 [ 61.497157] page dumped because: kasan: bad access detected [ 61.497965] [ 61.498224] Memory state around the buggy address: [ 61.498928] ffff88800eefeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.499993] ffff88800eefeb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.501042] >ffff88800eefec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.502074] ^ [ 61.502724] ffff88800eefec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.503775] ffff88800eefed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.504820] ================================================================== [ 61.505957] Disabling lock debugging due to kernel taint [ 63.545198] BUG: Bad rss-counter state mm:00000000fa3ca463 type:MM_FILEPAGES val:33 [ 63.546369] BUG: Bad rss-counter state mm:00000000fa3ca463 type:MM_ANONPAGES val:22 [ 63.929787] BUG: Bad rss-counter state mm:00000000da1d839a type:MM_FILEPAGES val:33 [ 63.930819] BUG: Bad rss-counter state mm:00000000da1d839a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50777' (ECDSA) to the list of known hosts. 2023/06/20 23:45:01 fuzzer started 2023/06/20 23:45:01 dialing manager at localhost:36067 2023/06/20 23:45:01 checking machine... 2023/06/20 23:45:01 checking revisions... [ 64.640117] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:45:02 testing simple program... [ 64.699140] cgroup: Unknown subsys name 'net' [ 64.736820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81143eea RDX=0000000000000000 RSI=0000000000000100 RDI=0000000000000000 RBP=ffff888015b00000 RSP=ffff88801c1c7a50 R8 =0000000000000000 R9 =ffffed1002b600ee R10=ffff888015b00773 R11=0000000000000000 R12=ffff88800d6bd340 R13=ffff888015b00770 R14=0000000000000020 R15=0000000000000049 RIP=ffffffff810c3444 RFL=00000046 [---Z-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 00007f3f505f4900 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=00007f3f50bac0b0 CR3=000000000f346000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f294041b8d0 CR3=000000000cf22000 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=d315e9bbab7a9f8f7443398c1a6e8db2 XMM02=2c67c8bc2e329bc3000000000011b1a0 XMM03=fb795ef6d65770560000000000121f48 XMM04=8cfeb951a183a1dc00000000000ae988 XMM05=19e9129bd510f2350000000000131e10 XMM06=4fda316b135da52b0000000000131c98 XMM07=e042d86d42eb936e00000000001221c8 XMM08=837a360b92c93cf6000000000011b200 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000