syzkaller login: [ 35.306534] BUG: Bad rss-counter state mm:0000000004ea334c type:MM_FILEPAGES val:33 [ 35.307450] BUG: Bad rss-counter state mm:0000000004ea334c type:MM_ANONPAGES val:22 [ 35.469761] ================================================================== [ 35.470878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.472085] Read of size 8 at addr ffff8880094b6058 by task sshd/221 [ 35.473003] [ 35.473222] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.474084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.475101] Call Trace: [ 35.475420] [ 35.475705] dump_stack_lvl+0x91/0xf0 [ 35.476198] print_report+0xcc/0x620 [ 35.476685] ? __virt_addr_valid+0x102/0x340 [ 35.477245] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.477860] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.478473] kasan_report+0xbe/0xf0 [ 35.478947] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.479587] vma_interval_tree_remove+0xc75/0xec0 [ 35.480192] vma_prepare+0xc54/0x11a0 [ 35.480672] __split_vma+0x5af/0x950 [ 35.481149] ? __pfx___split_vma+0x10/0x10 [ 35.481678] ? find_held_lock+0x2c/0x110 [ 35.482200] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.482766] ? lock_is_held_type+0x9f/0x120 [ 35.483335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.483947] ? mtree_range_walk+0x632/0x900 [ 35.484497] ? mas_walk+0x5c7/0x7c0 [ 35.484973] do_vmi_munmap+0x1f1/0x2b0 [ 35.485464] mmap_region+0x1f9/0x2660 [ 35.485951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.486471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.487204] ? __pfx_lock_acquire+0x10/0x10 [ 35.487741] ? __pfx_mmap_region+0x10/0x10 [ 35.488271] ? security_mmap_addr+0x7d/0xa0 [ 35.488800] ? get_unmapped_area+0x1f5/0x3f0 [ 35.489352] do_mmap+0x854/0xf00 [ 35.489792] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.490289] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.490853] ksys_mmap_pgoff+0x3af/0x500 [ 35.491383] do_syscall_64+0x3f/0x90 [ 35.491858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.492503] RIP: 0033:0x7f88d3150d82 [ 35.492957] 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 [ 35.495086] RSP: 002b:00007ffdcd55f638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.495990] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88d3150d82 [ 35.496841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88d258a000 [ 35.497687] RBP: 00007f88d258a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.498533] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b7af61ec0 [ 35.499378] R13: 00007ffdcd55f650 R14: 00007ffdcd55f680 R15: 00007ffdcd55f9e0 [ 35.500233] [ 35.500530] [ 35.500748] Allocated by task 214: [ 35.501177] kasan_save_stack+0x22/0x50 [ 35.501689] kasan_set_track+0x25/0x30 [ 35.502183] __kasan_slab_alloc+0x59/0x70 [ 35.502716] kmem_cache_alloc+0x16b/0x370 [ 35.503258] vm_area_dup+0x20/0x160 [ 35.503719] __split_vma+0x170/0x950 [ 35.504182] split_vma+0xc6/0x110 [ 35.504623] mprotect_fixup+0x8d2/0xb30 [ 35.505127] do_mprotect_pkey+0x87e/0xd40 [ 35.505653] __x64_sys_mprotect+0x78/0xc0 [ 35.506173] do_syscall_64+0x3f/0x90 [ 35.506646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.507291] [ 35.507510] Freed by task 214: [ 35.507901] kasan_save_stack+0x22/0x50 [ 35.508405] kasan_set_track+0x25/0x30 [ 35.508899] kasan_save_free_info+0x2b/0x50 [ 35.509434] __kasan_slab_free+0x10a/0x190 [ 35.509969] kmem_cache_free+0x10d/0x4d0 [ 35.510475] rcu_core+0x8c8/0x2860 [ 35.510918] __do_softirq+0x1b7/0x7d4 [ 35.511408] [ 35.511628] Last potentially related work creation: [ 35.512212] kasan_save_stack+0x22/0x50 [ 35.512717] __kasan_record_aux_stack+0x8e/0xa0 [ 35.513286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.514008] remove_vma+0x139/0x170 [ 35.514464] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.515036] do_vmi_munmap+0x1f1/0x2b0 [ 35.515523] __vm_munmap+0x138/0x3a0 [ 35.516000] __x64_sys_munmap+0x59/0x80 [ 35.516530] do_syscall_64+0x3f/0x90 [ 35.517002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.517646] [ 35.517862] Second to last potentially related work creation: [ 35.518546] kasan_save_stack+0x22/0x50 [ 35.519059] __kasan_record_aux_stack+0x8e/0xa0 [ 35.519643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.520284] remove_vma+0x139/0x170 [ 35.520733] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.521291] do_vmi_munmap+0x1f1/0x2b0 [ 35.521778] __vm_munmap+0x138/0x3a0 [ 35.522244] __x64_sys_munmap+0x59/0x80 [ 35.522741] do_syscall_64+0x3f/0x90 [ 35.523239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.523883] [ 35.524102] The buggy address belongs to the object at ffff8880094b6000 [ 35.524102] which belongs to the cache vm_area_struct of size 168 [ 35.525577] The buggy address is located 88 bytes inside of [ 35.525577] freed 168-byte region [ffff8880094b6000, ffff8880094b60a8) [ 35.526984] [ 35.527218] The buggy address belongs to the physical page: [ 35.527896] page:00000000eda5f5f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94b6 [ 35.528974] memcg:ffff88800c6f3f01 [ 35.529410] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.530058] page_type: 0xffffffff() [ 35.530508] raw: 0100000000000200 ffff88800879fc80 ffffea000067d540 dead000000000004 [ 35.531442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6f3f01 [ 35.532349] page dumped because: kasan: bad access detected [ 35.533010] [ 35.533231] Memory state around the buggy address: [ 35.533815] ffff8880094b5f00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb [ 35.534677] ffff8880094b5f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 35.535542] >ffff8880094b6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.536392] ^ [ 35.537120] ffff8880094b6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.537975] ffff8880094b6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.538826] ================================================================== [ 35.539769] Disabling lock debugging due to kernel taint [ 37.500921] BUG: Bad rss-counter state mm:0000000054034be7 type:MM_FILEPAGES val:33 [ 37.502186] BUG: Bad rss-counter state mm:0000000054034be7 type:MM_ANONPAGES val:22 [ 37.876768] BUG: Bad rss-counter state mm:00000000a69e13fa type:MM_FILEPAGES val:33 [ 37.877782] BUG: Bad rss-counter state mm:00000000a69e13fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33868' (ECDSA) to the list of known hosts. 2023/06/19 19:20:41 fuzzer started 2023/06/19 19:20:41 dialing manager at localhost:44161 2023/06/19 19:20:41 checking machine... 2023/06/19 19:20:41 checking revisions... [ 38.569817] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:20:41 testing simple program... [ 38.619124] cgroup: Unknown subsys name 'net' [ 38.657289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:20:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000202 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888009d4de40 RBP=ffffffff8452fffc RSP=ffff8880163efd18 R8 =0000000000000000 R9 =ffffed10013a9bc8 R10=ffff888009d4de43 R11=00000000000b6cb2 R12=ffff888009d4ded0 R13=ffff888009d4de80 R14=ffffffff813782a8 R15=ffff88801a201398 RIP=ffffffff81534237 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe4e5d79900 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=00007fe4e6330618 CR3=0000000009710000 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=563412feff00545000000000000080fe 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=0000000000000001 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=00007fc5cbe09da0 CR3=000000000c7e4000 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=3fb5273fc33295a1b04fa4bc578d7bd5 XMM02=000000000011fc10eff9b2d0a8fce9cb XMM03=000000000011fce02c67c8bc2e329bc3 XMM04=e72d95f16edf10fc00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134f20 XMM06=a741a1f7f9ae47f30000000000133d88 XMM07=e042d86d42eb936e00000000001245c8 XMM08=05c1ef5cfadbb93a000000000011fce0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000