syzkaller login: [ 29.122265] BUG: Bad rss-counter state mm:00000000e1abfe25 type:MM_FILEPAGES val:33 [ 29.123720] BUG: Bad rss-counter state mm:00000000e1abfe25 type:MM_ANONPAGES val:22 [ 29.290344] ================================================================== [ 29.291265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.292197] Read of size 8 at addr ffff888018ffe058 by task sshd/219 [ 29.292960] [ 29.293286] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.294146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.295111] Call Trace: [ 29.295559] [ 29.295916] dump_stack_lvl+0x91/0xf0 [ 29.296493] print_report+0xcc/0x620 [ 29.297064] ? __virt_addr_valid+0x102/0x340 [ 29.297718] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.298450] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.299193] kasan_report+0xbe/0xf0 [ 29.299781] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.300533] vma_interval_tree_remove+0xc75/0xec0 [ 29.301262] vma_prepare+0xc54/0x11a0 [ 29.301837] __split_vma+0x5af/0x950 [ 29.302406] ? __pfx___split_vma+0x10/0x10 [ 29.303050] ? find_held_lock+0x2c/0x110 [ 29.303708] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.304392] ? lock_is_held_type+0x9f/0x120 [ 29.304980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.305739] ? mtree_range_walk+0x632/0x900 [ 29.306363] ? mas_walk+0x5c7/0x7c0 [ 29.306858] do_vmi_munmap+0x1f1/0x2b0 [ 29.307351] mmap_region+0x1f9/0x2660 [ 29.307857] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.308364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.309072] ? __pfx_lock_acquire+0x10/0x10 [ 29.309602] ? __pfx_mmap_region+0x10/0x10 [ 29.310130] ? security_mmap_addr+0x7d/0xa0 [ 29.310653] ? get_unmapped_area+0x1f5/0x3f0 [ 29.311208] do_mmap+0x854/0xf00 [ 29.311668] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.312164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.312725] ksys_mmap_pgoff+0x3af/0x500 [ 29.313226] do_syscall_64+0x3f/0x90 [ 29.313705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.314344] RIP: 0033:0x7f28b4d4ed82 [ 29.314845] 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 [ 29.316967] RSP: 002b:00007ffddb7c6138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.317883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28b4d4ed82 [ 29.318718] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28b4188000 [ 29.319561] RBP: 00007f28b4188000 R08: 0000000000000009 R09: 0000000000001000 [ 29.320411] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f6d994ec0 [ 29.321261] R13: 00007ffddb7c6150 R14: 00007ffddb7c6180 R15: 00007ffddb7c64e0 [ 29.322115] [ 29.322405] [ 29.322622] Allocated by task 211: [ 29.323053] kasan_save_stack+0x22/0x50 [ 29.323559] kasan_set_track+0x25/0x30 [ 29.324067] __kasan_slab_alloc+0x59/0x70 [ 29.324586] kmem_cache_alloc+0x16b/0x370 [ 29.325112] vm_area_dup+0x20/0x160 [ 29.325568] __split_vma+0x170/0x950 [ 29.326034] split_vma+0xc6/0x110 [ 29.326472] mprotect_fixup+0x8d2/0xb30 [ 29.326978] do_mprotect_pkey+0x87e/0xd40 [ 29.327499] __x64_sys_mprotect+0x78/0xc0 [ 29.328026] do_syscall_64+0x3f/0x90 [ 29.328494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.329137] [ 29.329348] Freed by task 211: [ 29.329737] kasan_save_stack+0x22/0x50 [ 29.330235] kasan_set_track+0x25/0x30 [ 29.330728] kasan_save_free_info+0x2b/0x50 [ 29.331264] __kasan_slab_free+0x10a/0x190 [ 29.331803] kmem_cache_free+0x10d/0x4d0 [ 29.332312] rcu_core+0x8c8/0x2860 [ 29.332756] __do_softirq+0x1b7/0x7d4 [ 29.333235] [ 29.333453] Last potentially related work creation: [ 29.334032] kasan_save_stack+0x22/0x50 [ 29.334529] __kasan_record_aux_stack+0x8e/0xa0 [ 29.335103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.335755] remove_vma+0x139/0x170 [ 29.336202] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.336757] do_vmi_munmap+0x1f1/0x2b0 [ 29.337243] __vm_munmap+0x138/0x3a0 [ 29.337711] __x64_sys_munmap+0x59/0x80 [ 29.338204] do_syscall_64+0x3f/0x90 [ 29.338671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.339322] [ 29.339535] The buggy address belongs to the object at ffff888018ffe000 [ 29.339535] which belongs to the cache vm_area_struct of size 168 [ 29.340999] The buggy address is located 88 bytes inside of [ 29.340999] freed 168-byte region [ffff888018ffe000, ffff888018ffe0a8) [ 29.342385] [ 29.342602] The buggy address belongs to the physical page: [ 29.343260] page:0000000079c7e53d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ffe [ 29.344359] memcg:ffff88800e142601 [ 29.344780] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.345422] page_type: 0xffffffff() [ 29.345880] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354b80 dead000000000006 [ 29.346788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e142601 [ 29.347703] page dumped because: kasan: bad access detected [ 29.348352] [ 29.348568] Memory state around the buggy address: [ 29.349156] ffff888018ffdf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 29.350007] ffff888018ffdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.350854] >ffff888018ffe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.351715] ^ [ 29.352443] ffff888018ffe080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.353287] ffff888018ffe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.354131] ================================================================== [ 29.355346] Disabling lock debugging due to kernel taint [ 31.292928] BUG: Bad rss-counter state mm:000000008ad0efc2 type:MM_FILEPAGES val:33 [ 31.294113] BUG: Bad rss-counter state mm:000000008ad0efc2 type:MM_ANONPAGES val:22 [ 31.811419] BUG: Bad rss-counter state mm:00000000e5506416 type:MM_FILEPAGES val:33 [ 31.812589] BUG: Bad rss-counter state mm:00000000e5506416 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62838' (ECDSA) to the list of known hosts. 2023/06/21 01:54:39 fuzzer started 2023/06/21 01:54:39 dialing manager at localhost:36067 2023/06/21 01:54:39 checking machine... 2023/06/21 01:54:39 checking revisions... [ 32.410109] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:54:39 testing simple program... [ 32.461160] cgroup: Unknown subsys name 'net' [ 32.496118] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:54:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=0000000000000000 RDX=0000000000000004 RSI=0000000000000008 RDI=ffffffff81839900 RBP=ffff88800c866000 RSP=ffff88800f2f7800 R8 =0000000000000000 R9 =ffffffff87b6a200 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000006 R14=0000000000000148 R15=ffff88806ce361a0 RIP=ffffffff8183994b RFL=00000012 [----A--] 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 00007f170f6b8900 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=00007f170fc6d650 CR3=0000000015e10000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fd1d3e23e60 CR3=000000000c62e000 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=680295f504d106ad6048dbcd0b442ae7 XMM02=2c67c8bc2e329bc3000000000011d308 XMM03=fb795ef6d65770560000000000121280 XMM04=359e9c71a37dd11d00000000000ae988 XMM05=8ad8bdf829b37a490000000000131d78 XMM06=806171799158d9670000000000131770 XMM07=e042d86d42eb936e0000000000121500 XMM08=084df6c12dd05409000000000011d368 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000