syzkaller login: [ 31.561063] BUG: Bad rss-counter state mm:00000000dd3424e6 type:MM_FILEPAGES val:33 [ 31.561740] BUG: Bad rss-counter state mm:00000000dd3424e6 type:MM_ANONPAGES val:22 [ 31.695653] ================================================================== [ 31.696313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.696927] Read of size 8 at addr ffff888018397310 by task sshd/221 [ 31.697429] [ 31.697574] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.698154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.698887] Call Trace: [ 31.699108] [ 31.699302] dump_stack_lvl+0x91/0xf0 [ 31.699706] print_report+0xcc/0x620 [ 31.700307] ? __virt_addr_valid+0x102/0x340 [ 31.700719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.701139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.701555] kasan_report+0xbe/0xf0 [ 31.701877] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.702286] vma_interval_tree_remove+0xc75/0xec0 [ 31.702714] vma_prepare+0xc54/0x11a0 [ 31.703108] __split_vma+0x5af/0x950 [ 31.703427] ? __pfx___split_vma+0x10/0x10 [ 31.703809] ? find_held_lock+0x2c/0x110 [ 31.704157] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.704544] ? lock_is_held_type+0x9f/0x120 [ 31.704922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.705346] ? mtree_range_walk+0x632/0x900 [ 31.705732] ? mas_walk+0x5c7/0x7c0 [ 31.706067] do_vmi_munmap+0x1f1/0x2b0 [ 31.706405] mmap_region+0x1f9/0x2660 [ 31.706739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.707099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.707584] ? __pfx_lock_acquire+0x10/0x10 [ 31.708006] ? __pfx_mmap_region+0x10/0x10 [ 31.708362] ? security_mmap_addr+0x7d/0xa0 [ 31.708735] ? get_unmapped_area+0x1f5/0x3f0 [ 31.709138] do_mmap+0x854/0xf00 [ 31.709445] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.709814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.710235] ksys_mmap_pgoff+0x3af/0x500 [ 31.710582] do_syscall_64+0x3f/0x90 [ 31.710920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.711386] RIP: 0033:0x7fbeb6967d82 [ 31.711750] 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 [ 31.713289] RSP: 002b:00007ffcd2083c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.713949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbeb6967d82 [ 31.714535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbeb5da1000 [ 31.715126] RBP: 00007fbeb5da1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.715777] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565213d03b20 [ 31.716383] R13: 00007ffcd2083c50 R14: 00007ffcd2083c80 R15: 00007ffcd2083fe0 [ 31.716983] [ 31.717184] [ 31.717332] Allocated by task 214: [ 31.717631] kasan_save_stack+0x22/0x50 [ 31.718001] kasan_set_track+0x25/0x30 [ 31.718336] __kasan_slab_alloc+0x59/0x70 [ 31.718695] kmem_cache_alloc+0x16b/0x370 [ 31.719044] vm_area_dup+0x20/0x160 [ 31.719357] __split_vma+0x170/0x950 [ 31.719699] split_vma+0xc6/0x110 [ 31.720012] mprotect_fixup+0x8d2/0xb30 [ 31.720370] do_mprotect_pkey+0x87e/0xd40 [ 31.720720] __x64_sys_mprotect+0x78/0xc0 [ 31.721086] do_syscall_64+0x3f/0x90 [ 31.721406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721845] [ 31.722005] Freed by task 19: [ 31.722271] kasan_save_stack+0x22/0x50 [ 31.722616] kasan_set_track+0x25/0x30 [ 31.722959] kasan_save_free_info+0x2b/0x50 [ 31.723331] __kasan_slab_free+0x10a/0x190 [ 31.723735] kmem_cache_free+0x10d/0x4d0 [ 31.724079] rcu_core+0x8c8/0x2860 [ 31.724382] __do_softirq+0x1b7/0x7d4 [ 31.724713] [ 31.724875] Last potentially related work creation: [ 31.725277] kasan_save_stack+0x22/0x50 [ 31.725637] __kasan_record_aux_stack+0x8e/0xa0 [ 31.726031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.726496] remove_vma+0x139/0x170 [ 31.726813] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.727212] do_vmi_munmap+0x1f1/0x2b0 [ 31.727540] __vm_munmap+0x138/0x3a0 [ 31.727910] __x64_sys_munmap+0x59/0x80 [ 31.728251] do_syscall_64+0x3f/0x90 [ 31.728600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.729069] [ 31.729232] The buggy address belongs to the object at ffff8880183972b8 [ 31.729232] which belongs to the cache vm_area_struct of size 168 [ 31.730266] The buggy address is located 88 bytes inside of [ 31.730266] freed 168-byte region [ffff8880183972b8, ffff888018397360) [ 31.731226] [ 31.731371] The buggy address belongs to the physical page: [ 31.731861] page:000000008cda9361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18397 [ 31.732622] memcg:ffff88800dc8da01 [ 31.732924] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.733368] page_type: 0xffffffff() [ 31.733691] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.734316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc8da01 [ 31.734918] page dumped because: kasan: bad access detected [ 31.735340] [ 31.735485] Memory state around the buggy address: [ 31.735961] ffff888018397200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.736538] ffff888018397280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.737133] >ffff888018397300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.737710] ^ [ 31.738026] ffff888018397380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.738583] ffff888018397400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.739152] ================================================================== [ 31.739844] Disabling lock debugging due to kernel taint [ 33.150991] BUG: Bad rss-counter state mm:0000000026c89dc1 type:MM_FILEPAGES val:33 [ 33.152113] BUG: Bad rss-counter state mm:0000000026c89dc1 type:MM_ANONPAGES val:22 [ 33.519033] BUG: Bad rss-counter state mm:000000004d27e027 type:MM_FILEPAGES val:33 [ 33.519889] BUG: Bad rss-counter state mm:000000004d27e027 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12760' (ECDSA) to the list of known hosts. 2023/06/21 08:56:16 fuzzer started 2023/06/21 08:56:16 dialing manager at localhost:36067 2023/06/21 08:56:16 checking machine... 2023/06/21 08:56:16 checking revisions... [ 34.081523] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:56:16 testing simple program... [ 34.122943] cgroup: Unknown subsys name 'net' [ 34.153284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:15 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000287 R13=ffffea0000389280 R14=ffffffff8186b835 R15=ffff88800dac0180 RIP=ffffffff812e009a RFL=00000046 [---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=00007f3860148020 CR3=000000000cab0000 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=de3c379b083dc5bc0e473fcfa6a41407 XMM02=2c67c8bc2e329bc3000000000011b010 XMM03=fb795ef6d657705600000000001225a8 XMM04=db6c6c1c26a85eee00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132408 XMM06=e79734d0527c71d70000000000131270 XMM07=e042d86d42eb936e0000000000122828 XMM08=2768f934d1af9003000000000011b070 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000000e6 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffffffff84535d53 RBP=ffffffff856d84a0 RSP=ffff888014377368 R8 =00000000734023e5 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff88801cddd9c8 R15=ffff88801cddd980 RIP=ffffffff815343b7 RFL=00000046 [---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 00007f003a519900 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=00007f003a4de008 CR3=0000000019c28000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000