syzkaller login: [ 36.307717] BUG: Bad rss-counter state mm:00000000969c2641 type:MM_FILEPAGES val:33 [ 36.310084] BUG: Bad rss-counter state mm:00000000969c2641 type:MM_ANONPAGES val:22 [ 36.471142] ================================================================== [ 36.472074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.473045] Read of size 8 at addr ffff88801bc32d08 by task sshd/221 [ 36.473909] [ 36.474142] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.475009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.475990] Call Trace: [ 36.476321] [ 36.476612] dump_stack_lvl+0x91/0xf0 [ 36.477120] print_report+0xcc/0x620 [ 36.477608] ? __virt_addr_valid+0x102/0x340 [ 36.478173] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.478796] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.479409] kasan_report+0xbe/0xf0 [ 36.479901] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.480535] vma_interval_tree_remove+0xc75/0xec0 [ 36.481160] vma_prepare+0xc54/0x11a0 [ 36.481645] __split_vma+0x5af/0x950 [ 36.482117] ? __pfx___split_vma+0x10/0x10 [ 36.482647] ? find_held_lock+0x2c/0x110 [ 36.483165] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.483737] ? lock_is_held_type+0x9f/0x120 [ 36.484295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.484908] ? mtree_range_walk+0x632/0x900 [ 36.485464] ? mas_walk+0x5c7/0x7c0 [ 36.485942] do_vmi_munmap+0x1f1/0x2b0 [ 36.486435] mmap_region+0x1f9/0x2660 [ 36.486922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.487440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.488158] ? __pfx_lock_acquire+0x10/0x10 [ 36.488716] ? __pfx_mmap_region+0x10/0x10 [ 36.489248] ? security_mmap_addr+0x7d/0xa0 [ 36.489781] ? get_unmapped_area+0x1f5/0x3f0 [ 36.490335] do_mmap+0x854/0xf00 [ 36.490788] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.491282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.491844] ksys_mmap_pgoff+0x3af/0x500 [ 36.492355] do_syscall_64+0x3f/0x90 [ 36.492846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.493499] RIP: 0033:0x7f8b22d0bd82 [ 36.493959] 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 [ 36.496099] RSP: 002b:00007ffe60fe7fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.497012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b22d0bd82 [ 36.497862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b22145000 [ 36.498713] RBP: 00007f8b22145000 R08: 0000000000000009 R09: 0000000000001000 [ 36.499559] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561260902ec0 [ 36.500408] R13: 00007ffe60fe7fc0 R14: 00007ffe60fe7ff0 R15: 00007ffe60fe8350 [ 36.501284] [ 36.501580] [ 36.501799] Allocated by task 214: [ 36.502243] kasan_save_stack+0x22/0x50 [ 36.502749] kasan_set_track+0x25/0x30 [ 36.503241] __kasan_slab_alloc+0x59/0x70 [ 36.503764] kmem_cache_alloc+0x16b/0x370 [ 36.504281] vm_area_dup+0x20/0x160 [ 36.504739] __split_vma+0x170/0x950 [ 36.505207] split_vma+0xc6/0x110 [ 36.505647] mprotect_fixup+0x8d2/0xb30 [ 36.506146] do_mprotect_pkey+0x87e/0xd40 [ 36.506669] __x64_sys_mprotect+0x78/0xc0 [ 36.507194] do_syscall_64+0x3f/0x90 [ 36.507665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.508304] [ 36.508521] Freed by task 214: [ 36.508921] kasan_save_stack+0x22/0x50 [ 36.509427] kasan_set_track+0x25/0x30 [ 36.509917] kasan_save_free_info+0x2b/0x50 [ 36.510450] __kasan_slab_free+0x10a/0x190 [ 36.510986] kmem_cache_free+0x10d/0x4d0 [ 36.511494] rcu_core+0x8c8/0x2860 [ 36.511942] __do_softirq+0x1b7/0x7d4 [ 36.512415] [ 36.512635] Last potentially related work creation: [ 36.513252] kasan_save_stack+0x22/0x50 [ 36.513762] __kasan_record_aux_stack+0x8e/0xa0 [ 36.514347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.514996] remove_vma+0x139/0x170 [ 36.515452] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.516020] do_vmi_munmap+0x1f1/0x2b0 [ 36.516506] __vm_munmap+0x138/0x3a0 [ 36.516980] __x64_sys_munmap+0x59/0x80 [ 36.517477] do_syscall_64+0x3f/0x90 [ 36.517949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.518590] [ 36.518805] The buggy address belongs to the object at ffff88801bc32cb0 [ 36.518805] which belongs to the cache vm_area_struct of size 168 [ 36.520278] The buggy address is located 88 bytes inside of [ 36.520278] freed 168-byte region [ffff88801bc32cb0, ffff88801bc32d58) [ 36.521680] [ 36.521899] The buggy address belongs to the physical page: [ 36.522566] page:0000000002d40464 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc32 [ 36.523671] memcg:ffff8880158f2501 [ 36.524101] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.524768] page_type: 0xffffffff() [ 36.525216] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.526139] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158f2501 [ 36.527023] page dumped because: kasan: bad access detected [ 36.527665] [ 36.527872] Memory state around the buggy address: [ 36.528421] ffff88801bc32c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.529243] ffff88801bc32c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.530070] >ffff88801bc32d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.530885] ^ [ 36.531310] ffff88801bc32d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.532116] ffff88801bc32e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.532946] ================================================================== [ 36.534032] Disabling lock debugging due to kernel taint [ 38.369621] BUG: Bad rss-counter state mm:00000000b163a626 type:MM_FILEPAGES val:33 [ 38.370890] BUG: Bad rss-counter state mm:00000000b163a626 type:MM_ANONPAGES val:22 [ 38.778618] BUG: Bad rss-counter state mm:00000000c5bc6cef type:MM_FILEPAGES val:33 [ 38.779957] BUG: Bad rss-counter state mm:00000000c5bc6cef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32197' (ECDSA) to the list of known hosts. 2023/06/19 21:40:27 fuzzer started 2023/06/19 21:40:27 dialing manager at localhost:44161 2023/06/19 21:40:27 checking machine... 2023/06/19 21:40:27 checking revisions... [ 39.515229] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:40:27 testing simple program... [ 39.568166] cgroup: Unknown subsys name 'net' [ 39.623588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:22 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81830752 RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000288 R13=0000000000000200 R14=ffffffff8186b9c5 R15=ffff88800e8bcf00 RIP=ffffffff81534376 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 00007fad04a9f900 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=00007fad05056618 CR3=000000000e48c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fffa63dcc98 CR3=000000000fe1e000 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=2036323a30343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000