syzkaller login: [ 29.770347] BUG: Bad rss-counter state mm:00000000375fe381 type:MM_FILEPAGES val:33 [ 29.771614] BUG: Bad rss-counter state mm:00000000375fe381 type:MM_ANONPAGES val:22 [ 29.808566] ================================================================== [ 29.809736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.810851] Read of size 8 at addr ffff88800f6df140 by task sshd/220 [ 29.811864] [ 29.812127] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.813146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.814361] Call Trace: [ 29.814692] [ 29.814988] dump_stack_lvl+0x91/0xf0 [ 29.815501] print_report+0xcc/0x620 [ 29.815996] ? __virt_addr_valid+0x102/0x340 [ 29.816557] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.817186] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.817814] kasan_report+0xbe/0xf0 [ 29.818290] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.818922] vma_interval_tree_remove+0xc75/0xec0 [ 29.819540] vma_prepare+0xc54/0x11a0 [ 29.820020] __split_vma+0x5af/0x950 [ 29.820494] ? __pfx___split_vma+0x10/0x10 [ 29.821032] ? find_held_lock+0x2c/0x110 [ 29.821573] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.822154] ? lock_is_held_type+0x9f/0x120 [ 29.822693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.823315] ? mtree_range_walk+0x632/0x900 [ 29.823901] ? mas_walk+0x5c7/0x7c0 [ 29.824378] do_vmi_munmap+0x1f1/0x2b0 [ 29.824870] mmap_region+0x1f9/0x2660 [ 29.825359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.825883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.826614] ? __pfx_lock_acquire+0x10/0x10 [ 29.827157] ? __pfx_mmap_region+0x10/0x10 [ 29.827710] ? security_mmap_addr+0x7d/0xa0 [ 29.828246] ? get_unmapped_area+0x1f5/0x3f0 [ 29.828805] do_mmap+0x854/0xf00 [ 29.829251] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.829754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.830319] ksys_mmap_pgoff+0x3af/0x500 [ 29.830838] do_syscall_64+0x3f/0x90 [ 29.831339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.832027] RIP: 0033:0x7eff66689d82 [ 29.832495] 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 [ 29.834636] RSP: 002b:00007fff5dc3c148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.835575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff66689d82 [ 29.836452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff65ac3000 [ 29.837322] RBP: 00007eff65ac3000 R08: 0000000000000009 R09: 0000000000001000 [ 29.838198] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559183d88ec0 [ 29.839065] R13: 00007fff5dc3c160 R14: 00007fff5dc3c190 R15: 00007fff5dc3c4f0 [ 29.839972] [ 29.840278] [ 29.840498] Allocated by task 213: [ 29.840945] kasan_save_stack+0x22/0x50 [ 29.841460] kasan_set_track+0x25/0x30 [ 29.841965] __kasan_slab_alloc+0x59/0x70 [ 29.842495] kmem_cache_alloc+0x16b/0x370 [ 29.843032] vm_area_dup+0x20/0x160 [ 29.843507] __split_vma+0x170/0x950 [ 29.843975] split_vma+0xc6/0x110 [ 29.844410] mprotect_fixup+0x8d2/0xb30 [ 29.844915] do_mprotect_pkey+0x87e/0xd40 [ 29.845436] __x64_sys_mprotect+0x78/0xc0 [ 29.845955] do_syscall_64+0x3f/0x90 [ 29.846436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.847083] [ 29.847298] Freed by task 213: [ 29.847705] kasan_save_stack+0x22/0x50 [ 29.848216] kasan_set_track+0x25/0x30 [ 29.848708] kasan_save_free_info+0x2b/0x50 [ 29.849256] __kasan_slab_free+0x10a/0x190 [ 29.849798] kmem_cache_free+0x10d/0x4d0 [ 29.850311] rcu_core+0x8c8/0x2860 [ 29.850767] __do_softirq+0x1b7/0x7d4 [ 29.851241] [ 29.851479] Last potentially related work creation: [ 29.852068] kasan_save_stack+0x22/0x50 [ 29.852576] __kasan_record_aux_stack+0x8e/0xa0 [ 29.853160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.853806] remove_vma+0x139/0x170 [ 29.854259] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.854817] do_vmi_munmap+0x1f1/0x2b0 [ 29.855308] __vm_munmap+0x138/0x3a0 [ 29.855778] __x64_sys_munmap+0x59/0x80 [ 29.856282] do_syscall_64+0x3f/0x90 [ 29.856762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.857416] [ 29.857637] The buggy address belongs to the object at ffff88800f6df0e8 [ 29.857637] which belongs to the cache vm_area_struct of size 168 [ 29.859108] The buggy address is located 88 bytes inside of [ 29.859108] freed 168-byte region [ffff88800f6df0e8, ffff88800f6df190) [ 29.860545] [ 29.860764] The buggy address belongs to the physical page: [ 29.861451] page:000000008b00815e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6df [ 29.862561] memcg:ffff888018c60c01 [ 29.863005] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.863668] page_type: 0xffffffff() [ 29.864138] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.865070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c60c01 [ 29.865993] page dumped because: kasan: bad access detected [ 29.866667] [ 29.866890] Memory state around the buggy address: [ 29.867499] ffff88800f6df000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.868375] ffff88800f6df080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.869234] >ffff88800f6df100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.870090] ^ [ 29.870736] ffff88800f6df180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.871603] ffff88800f6df200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.872466] ================================================================== [ 29.873605] Disabling lock debugging due to kernel taint [ 32.656163] BUG: Bad rss-counter state mm:000000003c1297f5 type:MM_FILEPAGES val:33 [ 32.657332] BUG: Bad rss-counter state mm:000000003c1297f5 type:MM_ANONPAGES val:22 [ 33.067015] BUG: Bad rss-counter state mm:0000000084fea36c type:MM_FILEPAGES val:33 [ 33.068283] BUG: Bad rss-counter state mm:0000000084fea36c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56486' (ECDSA) to the list of known hosts. 2023/06/20 11:27:52 fuzzer started 2023/06/20 11:27:52 dialing manager at localhost:36067 2023/06/20 11:27:52 checking machine... 2023/06/20 11:27:52 checking revisions... [ 33.755874] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:27:52 testing simple program... [ 33.802455] cgroup: Unknown subsys name 'net' [ 33.844316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:27:52 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff85652c60 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=ffffffff86607973 RSP=ffff88806ce09a20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86607973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888013ebe7a0 RIP=ffffffff814c0871 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 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=00007f1e2872bb50 CR3=000000000c762000 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=643e162a72931dbb484f73d961f57d34 XMM02=000000000011aa20eff9b2d0a8fce9cb XMM03=000000000011aaf02c67c8bc2e329bc3 XMM04=2b15201af4fbee5800000000000ae988 XMM05=19e9129bd510f2350000000000131d00 XMM06=3b0bdd0d479d15710000000000130b68 XMM07=e042d86d42eb936e00000000001221b0 XMM08=ee7c91a07c7f3382000000000011aaf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000015180 RBX=ffff888008cdcb00 RCX=ffffffff83aac252 RDX=ffff88800eea51c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff8880094cc04c RSP=ffff8880195f73c8 R8 =0000000000000006 R9 =0000000000015180 R10=0000000000000009 R11=0000066700000667 R12=ffff88800f5d8000 R13=0000000000015180 R14=0000000000015180 R15=0000000000000009 RIP=ffffffff814c0860 RFL=00000216 [----AP-] 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 00007f57d5fa9900 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=00007f57d6560618 CR3=00000000197de000 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