syzkaller login: [ 30.289937] BUG: Bad rss-counter state mm:00000000aa02c002 type:MM_FILEPAGES val:33 [ 30.290664] BUG: Bad rss-counter state mm:00000000aa02c002 type:MM_ANONPAGES val:22 [ 30.424690] ================================================================== [ 30.425369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.426046] Read of size 8 at addr ffff888019cdcdf0 by task sshd/220 [ 30.426570] [ 30.426722] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.427309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.427969] Call Trace: [ 30.428191] [ 30.428393] dump_stack_lvl+0x91/0xf0 [ 30.428985] print_report+0xcc/0x620 [ 30.429329] ? __virt_addr_valid+0x102/0x340 [ 30.429713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.430150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.430576] kasan_report+0xbe/0xf0 [ 30.430898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.431345] vma_interval_tree_remove+0xc75/0xec0 [ 30.431742] vma_prepare+0xc54/0x11a0 [ 30.432056] __split_vma+0x5af/0x950 [ 30.432370] ? __pfx___split_vma+0x10/0x10 [ 30.432720] ? find_held_lock+0x2c/0x110 [ 30.433062] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.433445] ? lock_is_held_type+0x9f/0x120 [ 30.433858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.434284] ? mtree_range_walk+0x632/0x900 [ 30.434669] ? mas_walk+0x5c7/0x7c0 [ 30.434989] do_vmi_munmap+0x1f1/0x2b0 [ 30.435315] mmap_region+0x1f9/0x2660 [ 30.435641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.435986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.436463] ? __pfx_lock_acquire+0x10/0x10 [ 30.436817] ? __pfx_mmap_region+0x10/0x10 [ 30.437174] ? security_mmap_addr+0x7d/0xa0 [ 30.437533] ? get_unmapped_area+0x1f5/0x3f0 [ 30.437952] do_mmap+0x854/0xf00 [ 30.438249] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.438591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.438982] ksys_mmap_pgoff+0x3af/0x500 [ 30.439352] do_syscall_64+0x3f/0x90 [ 30.439693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.440144] RIP: 0033:0x7f2869ac7d82 [ 30.440455] 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 [ 30.441906] RSP: 002b:00007ffff157dea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.442538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2869ac7d82 [ 30.443099] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2868f01000 [ 30.443658] RBP: 00007f2868f01000 R08: 0000000000000009 R09: 0000000000001000 [ 30.444222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055797892bec0 [ 30.444834] R13: 00007ffff157dec0 R14: 00007ffff157def0 R15: 00007ffff157e250 [ 30.445394] [ 30.445587] [ 30.445728] Allocated by task 213: [ 30.446080] kasan_save_stack+0x22/0x50 [ 30.446475] kasan_set_track+0x25/0x30 [ 30.446802] __kasan_slab_alloc+0x59/0x70 [ 30.447174] kmem_cache_alloc+0x16b/0x370 [ 30.447518] vm_area_dup+0x20/0x160 [ 30.447808] __split_vma+0x170/0x950 [ 30.448110] split_vma+0xc6/0x110 [ 30.448401] mprotect_fixup+0x8d2/0xb30 [ 30.448763] do_mprotect_pkey+0x87e/0xd40 [ 30.449133] __x64_sys_mprotect+0x78/0xc0 [ 30.449501] do_syscall_64+0x3f/0x90 [ 30.449865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.450303] [ 30.450452] Freed by task 213: [ 30.450685] kasan_save_stack+0x22/0x50 [ 30.451007] kasan_set_track+0x25/0x30 [ 30.451331] kasan_save_free_info+0x2b/0x50 [ 30.451672] __kasan_slab_free+0x10a/0x190 [ 30.452016] kmem_cache_free+0x10d/0x4d0 [ 30.452358] rcu_core+0x8c8/0x2860 [ 30.452684] __do_softirq+0x1b7/0x7d4 [ 30.453013] [ 30.453162] Last potentially related work creation: [ 30.453529] kasan_save_stack+0x22/0x50 [ 30.453877] __kasan_record_aux_stack+0x8e/0xa0 [ 30.454253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.454689] remove_vma+0x139/0x170 [ 30.454999] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.455371] do_vmi_munmap+0x1f1/0x2b0 [ 30.455683] __vm_munmap+0x138/0x3a0 [ 30.455985] __x64_sys_munmap+0x59/0x80 [ 30.456305] do_syscall_64+0x3f/0x90 [ 30.456600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.457003] [ 30.457139] The buggy address belongs to the object at ffff888019cdcd98 [ 30.457139] which belongs to the cache vm_area_struct of size 168 [ 30.458130] The buggy address is located 88 bytes inside of [ 30.458130] freed 168-byte region [ffff888019cdcd98, ffff888019cdce40) [ 30.459034] [ 30.459173] The buggy address belongs to the physical page: [ 30.459584] page:00000000f1a06ef3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cdc [ 30.460273] memcg:ffff88800de5b701 [ 30.460550] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.460991] page_type: 0xffffffff() [ 30.461287] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.461892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5b701 [ 30.462460] page dumped because: kasan: bad access detected [ 30.462880] [ 30.463013] Memory state around the buggy address: [ 30.463363] ffff888019cdcc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.463889] ffff888019cdcd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.464407] >ffff888019cdcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.464913] ^ [ 30.465424] ffff888019cdce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.465995] ffff888019cdce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.466514] ================================================================== [ 30.467330] Disabling lock debugging due to kernel taint [ 31.901390] BUG: Bad rss-counter state mm:000000003ada9d5b type:MM_FILEPAGES val:33 [ 31.902150] BUG: Bad rss-counter state mm:000000003ada9d5b type:MM_ANONPAGES val:22 [ 32.387577] BUG: Bad rss-counter state mm:00000000cb52c5f5 type:MM_FILEPAGES val:33 [ 32.388332] BUG: Bad rss-counter state mm:00000000cb52c5f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39950' (ECDSA) to the list of known hosts. 2023/06/21 08:30:25 fuzzer started 2023/06/21 08:30:25 dialing manager at localhost:36067 2023/06/21 08:30:25 checking machine... 2023/06/21 08:30:25 checking revisions... [ 32.903881] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:30:25 testing simple program... [ 32.953894] cgroup: Unknown subsys name 'net' [ 33.007921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fcdf5f0 RCX=0000000000000000 RDX=ffffffff87b89c40 RSI=ffffffff848ff1e0 RDI=ffff88800fcdf608 RBP=ffffffff848ff1e0 RSP=ffff88801020fc88 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffff88800fcdf638 R15=ffff88800fcdf5f0 RIP=ffffffff812db29a RFL=00000246 [---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 00007f21edf4e900 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=00007f21ee505618 CR3=0000000019d68000 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=0000000000000001 RBX=ffff888018f67cc0 RCX=ffffffff81404c79 RDX=ffffed10011e4b91 RSI=0000000000000004 RDI=ffff888008f25c80 RBP=ffff888018f67c30 RSP=ffff888018f67b08 R8 =0000000000000001 R9 =ffffed10011e4b90 R10=ffff888008f25c83 R11=0000000000000000 R12=ffff888008f25c80 R13=ffffed10031ecf86 R14=ffff888018f67cc0 R15=0000000000000000 RIP=ffffffff81404c7e RFL=00000202 [-------] 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 00007f3719b90700 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=00007fb18845d950 CR3=0000000019a68000 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=2034323a30333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000