syzkaller login: [ 30.537135] BUG: Bad rss-counter state mm:00000000ba873a39 type:MM_FILEPAGES val:33 [ 30.538370] BUG: Bad rss-counter state mm:00000000ba873a39 type:MM_ANONPAGES val:22 [ 30.577836] ================================================================== [ 30.578970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.579984] Read of size 8 at addr ffff88800d69bc20 by task sshd/221 [ 30.580833] [ 30.581073] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.582006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.583071] Call Trace: [ 30.583421] [ 30.583743] dump_stack_lvl+0x91/0xf0 [ 30.584322] print_report+0xcc/0x620 [ 30.584859] ? __virt_addr_valid+0x102/0x340 [ 30.585466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586136] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586806] kasan_report+0xbe/0xf0 [ 30.587330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.588037] vma_interval_tree_remove+0xc75/0xec0 [ 30.588724] vma_prepare+0xc54/0x11a0 [ 30.589255] __split_vma+0x5af/0x950 [ 30.589783] ? __pfx___split_vma+0x10/0x10 [ 30.590378] ? find_held_lock+0x2c/0x110 [ 30.590959] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.591597] ? lock_is_held_type+0x9f/0x120 [ 30.592208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.592890] ? mtree_range_walk+0x632/0x900 [ 30.593508] ? mas_walk+0x5c7/0x7c0 [ 30.594036] do_vmi_munmap+0x1f1/0x2b0 [ 30.594590] mmap_region+0x1f9/0x2660 [ 30.595128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.595699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.596524] ? __pfx_lock_acquire+0x10/0x10 [ 30.597123] ? __pfx_mmap_region+0x10/0x10 [ 30.597729] ? security_mmap_addr+0x7d/0xa0 [ 30.598326] ? get_unmapped_area+0x1f5/0x3f0 [ 30.598948] do_mmap+0x854/0xf00 [ 30.599440] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.599995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.600640] ksys_mmap_pgoff+0x3af/0x500 [ 30.601213] do_syscall_64+0x3f/0x90 [ 30.601750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.602478] RIP: 0033:0x7f092e01cd82 [ 30.602984] 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 [ 30.605394] RSP: 002b:00007ffdd21ec568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.606415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f092e01cd82 [ 30.607375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f092d456000 [ 30.608341] RBP: 00007f092d456000 R08: 0000000000000009 R09: 0000000000001000 [ 30.609287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a48bacec0 [ 30.610234] R13: 00007ffdd21ec580 R14: 00007ffdd21ec5b0 R15: 00007ffdd21ec910 [ 30.611194] [ 30.611520] [ 30.611761] Allocated by task 214: [ 30.612245] kasan_save_stack+0x22/0x50 [ 30.612798] kasan_set_track+0x25/0x30 [ 30.613348] __kasan_slab_alloc+0x59/0x70 [ 30.613931] kmem_cache_alloc+0x16b/0x370 [ 30.614505] vm_area_dup+0x20/0x160 [ 30.615009] __split_vma+0x170/0x950 [ 30.615526] split_vma+0xc6/0x110 [ 30.616007] mprotect_fixup+0x8d2/0xb30 [ 30.616589] do_mprotect_pkey+0x87e/0xd40 [ 30.617165] __x64_sys_mprotect+0x78/0xc0 [ 30.617744] do_syscall_64+0x3f/0x90 [ 30.618268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.618987] [ 30.619224] Freed by task 214: [ 30.619661] kasan_save_stack+0x22/0x50 [ 30.620227] kasan_set_track+0x25/0x30 [ 30.620787] kasan_save_free_info+0x2b/0x50 [ 30.621381] __kasan_slab_free+0x10a/0x190 [ 30.621970] kmem_cache_free+0x10d/0x4d0 [ 30.622532] rcu_core+0x8c8/0x2860 [ 30.623023] __do_softirq+0x1b7/0x7d4 [ 30.623554] [ 30.623791] Last potentially related work creation: [ 30.624443] kasan_save_stack+0x22/0x50 [ 30.625005] __kasan_record_aux_stack+0x8e/0xa0 [ 30.625631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.626322] remove_vma+0x139/0x170 [ 30.626823] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.627445] do_vmi_munmap+0x1f1/0x2b0 [ 30.627986] __vm_munmap+0x138/0x3a0 [ 30.628535] __x64_sys_munmap+0x59/0x80 [ 30.629086] do_syscall_64+0x3f/0x90 [ 30.629619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630328] [ 30.630569] Second to last potentially related work creation: [ 30.631325] kasan_save_stack+0x22/0x50 [ 30.631884] __kasan_record_aux_stack+0x8e/0xa0 [ 30.632534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.633246] remove_vma+0x139/0x170 [ 30.633745] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.634368] do_vmi_munmap+0x1f1/0x2b0 [ 30.634903] mmap_region+0x1f9/0x2660 [ 30.635434] do_mmap+0x854/0xf00 [ 30.635910] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.636474] ksys_mmap_pgoff+0x3af/0x500 [ 30.637030] do_syscall_64+0x3f/0x90 [ 30.637562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638280] [ 30.638523] The buggy address belongs to the object at ffff88800d69bbc8 [ 30.638523] which belongs to the cache vm_area_struct of size 168 [ 30.640147] The buggy address is located 88 bytes inside of [ 30.640147] freed 168-byte region [ffff88800d69bbc8, ffff88800d69bc70) [ 30.641696] [ 30.641934] The buggy address belongs to the physical page: [ 30.642667] page:00000000b3d54d38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd69b [ 30.643871] memcg:ffff88800d6fc101 [ 30.644351] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.645067] page_type: 0xffffffff() [ 30.645572] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bea00 dead000000000002 [ 30.646597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6fc101 [ 30.647596] page dumped because: kasan: bad access detected [ 30.648352] [ 30.648593] Memory state around the buggy address: [ 30.649240] ffff88800d69bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.650177] ffff88800d69bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.651110] >ffff88800d69bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.652042] ^ [ 30.652625] ffff88800d69bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.653559] ffff88800d69bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.654499] ================================================================== [ 30.655793] Disabling lock debugging due to kernel taint [ 32.912681] BUG: Bad rss-counter state mm:000000005e6fcccd type:MM_FILEPAGES val:33 [ 32.913840] BUG: Bad rss-counter state mm:000000005e6fcccd type:MM_ANONPAGES val:22 [ 33.422438] BUG: Bad rss-counter state mm:000000007b973475 type:MM_FILEPAGES val:33 [ 33.423518] BUG: Bad rss-counter state mm:000000007b973475 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56329' (ECDSA) to the list of known hosts. 2023/06/20 11:55:26 fuzzer started 2023/06/20 11:55:27 dialing manager at localhost:36067 2023/06/20 11:55:27 checking machine... 2023/06/20 11:55:27 checking revisions... [ 34.164912] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:55:27 testing simple program... [ 34.216644] cgroup: Unknown subsys name 'net' [ 34.258883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:55:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f59d0d1d830 CR3=000000000d88c000 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=8afa203e52c84da8554b996565bd6123 XMM02=000000000011b0b8eff9b2d0a8fce9cb XMM03=000000000011b1882c67c8bc2e329bc3 XMM04=394f6045e148f8c000000000000ae988 XMM05=59d5b690e0af863b0000000000133488 XMM06=00c3ffa147b8d8570000000000133310 XMM07=e042d86d42eb936e0000000000122590 XMM08=892aaf05ef77ee6a000000000011b188 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff836827e5 RDX=0000000000000004 RSI=ffffffff863b941c RDI=ffffffff85fa8e7c RBP=ffffffff85fa8e7c RSP=ffff88801a10f338 R8 =ffffffff863b941c R9 =ffff88801a10f430 R10=0000000000038001 R11=000000000008b92e R12=ffffffff85fa8e8c R13=ffffffff85fa8e7c R14=ffffffff85fa8e7c R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000212 [----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 00007fe336dfe900 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=00007fe3373b5618 CR3=00000000199a2000 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=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