syzkaller login: [ 30.187241] BUG: Bad rss-counter state mm:000000006f37547f type:MM_FILEPAGES val:33 [ 30.188440] BUG: Bad rss-counter state mm:000000006f37547f type:MM_ANONPAGES val:22 [ 30.352158] ================================================================== [ 30.353348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.354540] Read of size 8 at addr ffff88801595d058 by task sshd/219 [ 30.355607] [ 30.355868] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.356907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.357983] Call Trace: [ 30.358312] [ 30.358605] dump_stack_lvl+0x91/0xf0 [ 30.359105] print_report+0xcc/0x620 [ 30.359600] ? __virt_addr_valid+0x102/0x340 [ 30.360158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361440] kasan_report+0xbe/0xf0 [ 30.361912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.362526] vma_interval_tree_remove+0xc75/0xec0 [ 30.363127] vma_prepare+0xc54/0x11a0 [ 30.363603] __split_vma+0x5af/0x950 [ 30.364072] ? __pfx___split_vma+0x10/0x10 [ 30.364610] ? find_held_lock+0x2c/0x110 [ 30.365128] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.365699] ? lock_is_held_type+0x9f/0x120 [ 30.366237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.366838] ? mtree_range_walk+0x632/0x900 [ 30.367386] ? mas_walk+0x5c7/0x7c0 [ 30.367860] do_vmi_munmap+0x1f1/0x2b0 [ 30.368349] mmap_region+0x1f9/0x2660 [ 30.368854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.369363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.370073] ? __pfx_lock_acquire+0x10/0x10 [ 30.370602] ? __pfx_mmap_region+0x10/0x10 [ 30.371135] ? security_mmap_addr+0x7d/0xa0 [ 30.371662] ? get_unmapped_area+0x1f5/0x3f0 [ 30.372209] do_mmap+0x854/0xf00 [ 30.372654] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.373147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.373705] ksys_mmap_pgoff+0x3af/0x500 [ 30.374208] do_syscall_64+0x3f/0x90 [ 30.374684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.375338] RIP: 0033:0x7f5c7eb52d82 [ 30.375786] 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 [ 30.377916] RSP: 002b:00007ffd5018ee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.378822] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c7eb52d82 [ 30.379660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c7df8c000 [ 30.380509] RBP: 00007f5c7df8c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.381345] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a461386ec0 [ 30.382189] R13: 00007ffd5018eeb0 R14: 00007ffd5018eee0 R15: 00007ffd5018f240 [ 30.383041] [ 30.383332] [ 30.383548] Allocated by task 212: [ 30.383975] kasan_save_stack+0x22/0x50 [ 30.384490] kasan_set_track+0x25/0x30 [ 30.384985] __kasan_slab_alloc+0x59/0x70 [ 30.385511] kmem_cache_alloc+0x16b/0x370 [ 30.386024] vm_area_dup+0x20/0x160 [ 30.386495] __split_vma+0x170/0x950 [ 30.386976] split_vma+0xc6/0x110 [ 30.387412] mprotect_fixup+0x8d2/0xb30 [ 30.387919] do_mprotect_pkey+0x87e/0xd40 [ 30.388470] __x64_sys_mprotect+0x78/0xc0 [ 30.389006] do_syscall_64+0x3f/0x90 [ 30.389485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.390147] [ 30.390371] Freed by task 202: [ 30.390772] kasan_save_stack+0x22/0x50 [ 30.391290] kasan_set_track+0x25/0x30 [ 30.391798] kasan_save_free_info+0x2b/0x50 [ 30.392336] __kasan_slab_free+0x10a/0x190 [ 30.392894] kmem_cache_free+0x10d/0x4d0 [ 30.393419] rcu_core+0x8c8/0x2860 [ 30.393890] __do_softirq+0x1b7/0x7d4 [ 30.394383] [ 30.394597] Last potentially related work creation: [ 30.395178] kasan_save_stack+0x22/0x50 [ 30.395678] __kasan_record_aux_stack+0x8e/0xa0 [ 30.396298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.396959] remove_vma+0x139/0x170 [ 30.397409] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.397967] do_vmi_munmap+0x1f1/0x2b0 [ 30.398455] __vm_munmap+0x138/0x3a0 [ 30.398919] __x64_sys_munmap+0x59/0x80 [ 30.399411] do_syscall_64+0x3f/0x90 [ 30.399888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400532] [ 30.400750] The buggy address belongs to the object at ffff88801595d000 [ 30.400750] which belongs to the cache vm_area_struct of size 168 [ 30.402203] The buggy address is located 88 bytes inside of [ 30.402203] freed 168-byte region [ffff88801595d000, ffff88801595d0a8) [ 30.403619] [ 30.403836] The buggy address belongs to the physical page: [ 30.404496] page:00000000a601f641 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1595d [ 30.405590] memcg:ffff88800ec86a01 [ 30.406015] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.406653] page_type: 0xffffffff() [ 30.407108] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.408015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec86a01 [ 30.408935] page dumped because: kasan: bad access detected [ 30.409602] [ 30.409823] Memory state around the buggy address: [ 30.410399] ffff88801595cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.411245] ffff88801595cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.412097] >ffff88801595d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.412956] ^ [ 30.413676] ffff88801595d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.414522] ffff88801595d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.415373] ================================================================== [ 30.416295] Disabling lock debugging due to kernel taint [ 32.731191] BUG: Bad rss-counter state mm:0000000082075d38 type:MM_FILEPAGES val:33 [ 32.732171] BUG: Bad rss-counter state mm:0000000082075d38 type:MM_ANONPAGES val:22 [ 33.189656] BUG: Bad rss-counter state mm:000000003aec47d8 type:MM_FILEPAGES val:31 [ 33.190804] BUG: Bad rss-counter state mm:000000003aec47d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59141' (ECDSA) to the list of known hosts. 2023/06/20 14:19:22 fuzzer started 2023/06/20 14:19:22 dialing manager at localhost:36067 2023/06/20 14:19:22 checking machine... 2023/06/20 14:19:22 checking revisions... [ 33.826274] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:19:22 testing simple program... [ 33.864799] cgroup: Unknown subsys name 'net' [ 33.913310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:19:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000008 RCX=ffffffff822465ef RDX=ffff88800f6b0000 RSI=0000000000000f28 RDI=0000000000000008 RBP=ffff888019f12000 RSP=ffff8880180cf468 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000092100000921 R12=0000000000000004 R13=0000000000000008 R14=ffff8880180cf500 R15=0000000000000f28 RIP=ffffffff814c0348 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 00007f2e54e24900 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=00007f2e553db618 CR3=000000001414e000 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=00000016afeca95c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000054672 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f19ac R11=ffff88806cf09ff8 R12=0000000000054672 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----A-C] 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 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=00007f2584c2dfe0 CR3=000000000d71e000 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=376b7e8489e9a093764a209423899a9a XMM02=000000000011a9f8eff9b2d0a8fce9cb XMM03=000000000011aac82c67c8bc2e329bc3 XMM04=4fbd74900846de0e00000000000ae988 XMM05=19e9129bd510f2350000000000131d80 XMM06=3fdc4bff3e7732d20000000000130be8 XMM07=e042d86d42eb936e0000000000122188 XMM08=cd1e5e3bd7f70e3a000000000011aac8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000