syzkaller login: [ 31.048348] BUG: Bad rss-counter state mm:0000000090d86e21 type:MM_FILEPAGES val:33 [ 31.049659] BUG: Bad rss-counter state mm:0000000090d86e21 type:MM_ANONPAGES val:22 [ 31.209150] ================================================================== [ 31.210229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.211339] Read of size 8 at addr ffff88801aad3d08 by task sshd/220 [ 31.212391] [ 31.212646] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.213694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.214764] Call Trace: [ 31.215065] [ 31.215333] dump_stack_lvl+0x91/0xf0 [ 31.215806] print_report+0xcc/0x620 [ 31.216266] ? __virt_addr_valid+0x102/0x340 [ 31.216790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217367] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217945] kasan_report+0xbe/0xf0 [ 31.218397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219011] vma_interval_tree_remove+0xc75/0xec0 [ 31.219609] vma_prepare+0xc54/0x11a0 [ 31.220091] __split_vma+0x5af/0x950 [ 31.220556] ? __pfx___split_vma+0x10/0x10 [ 31.221075] ? find_held_lock+0x2c/0x110 [ 31.221593] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.222158] ? lock_is_held_type+0x9f/0x120 [ 31.222692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.223292] ? mtree_range_walk+0x632/0x900 [ 31.223863] ? mas_walk+0x5c7/0x7c0 [ 31.224333] do_vmi_munmap+0x1f1/0x2b0 [ 31.224821] mmap_region+0x1f9/0x2660 [ 31.225292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.226510] ? __pfx_lock_acquire+0x10/0x10 [ 31.227034] ? __pfx_mmap_region+0x10/0x10 [ 31.227552] ? security_mmap_addr+0x7d/0xa0 [ 31.228090] ? get_unmapped_area+0x1f5/0x3f0 [ 31.228627] do_mmap+0x854/0xf00 [ 31.229060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.229547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230108] ksys_mmap_pgoff+0x3af/0x500 [ 31.230620] do_syscall_64+0x3f/0x90 [ 31.231091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231730] RIP: 0033:0x7f11827c3d82 [ 31.232202] 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 [ 31.234325] RSP: 002b:00007ffd6ff9d278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11827c3d82 [ 31.236077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1181bfd000 [ 31.236930] RBP: 00007f1181bfd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237775] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f67e965ec0 [ 31.238613] R13: 00007ffd6ff9d290 R14: 00007ffd6ff9d2c0 R15: 00007ffd6ff9d620 [ 31.239460] [ 31.239753] [ 31.239983] Allocated by task 213: [ 31.240414] kasan_save_stack+0x22/0x50 [ 31.240912] kasan_set_track+0x25/0x30 [ 31.241400] __kasan_slab_alloc+0x59/0x70 [ 31.241922] kmem_cache_alloc+0x16b/0x370 [ 31.242441] vm_area_dup+0x20/0x160 [ 31.242892] __split_vma+0x170/0x950 [ 31.243346] split_vma+0xc6/0x110 [ 31.243789] mprotect_fixup+0x8d2/0xb30 [ 31.244297] do_mprotect_pkey+0x87e/0xd40 [ 31.244816] __x64_sys_mprotect+0x78/0xc0 [ 31.245332] do_syscall_64+0x3f/0x90 [ 31.245806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246437] [ 31.246656] Freed by task 203: [ 31.247048] kasan_save_stack+0x22/0x50 [ 31.247553] kasan_set_track+0x25/0x30 [ 31.248058] kasan_save_free_info+0x2b/0x50 [ 31.248584] __kasan_slab_free+0x10a/0x190 [ 31.249113] kmem_cache_free+0x10d/0x4d0 [ 31.249625] rcu_core+0x8c8/0x2860 [ 31.250065] __do_softirq+0x1b7/0x7d4 [ 31.250537] [ 31.250747] Last potentially related work creation: [ 31.251330] kasan_save_stack+0x22/0x50 [ 31.251838] __kasan_record_aux_stack+0x8e/0xa0 [ 31.252417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253127] remove_vma+0x139/0x170 [ 31.253574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254124] do_vmi_munmap+0x1f1/0x2b0 [ 31.254602] __vm_munmap+0x138/0x3a0 [ 31.255057] __x64_sys_munmap+0x59/0x80 [ 31.255545] do_syscall_64+0x3f/0x90 [ 31.256035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256676] [ 31.256889] The buggy address belongs to the object at ffff88801aad3cb0 [ 31.256889] which belongs to the cache vm_area_struct of size 168 [ 31.258358] The buggy address is located 88 bytes inside of [ 31.258358] freed 168-byte region [ffff88801aad3cb0, ffff88801aad3d58) [ 31.259750] [ 31.259989] The buggy address belongs to the physical page: [ 31.260641] page:00000000ad958604 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aad3 [ 31.261736] memcg:ffff88800ed43601 [ 31.262158] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262803] page_type: 0xffffffff() [ 31.263244] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.264171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed43601 [ 31.265082] page dumped because: kasan: bad access detected [ 31.265742] [ 31.265952] Memory state around the buggy address: [ 31.266526] ffff88801aad3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.267383] ffff88801aad3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.268243] >ffff88801aad3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.269100] ^ [ 31.269538] ffff88801aad3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.270394] ffff88801aad3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.271240] ================================================================== [ 31.272156] Disabling lock debugging due to kernel taint [ 33.183735] BUG: Bad rss-counter state mm:000000008c0c2c71 type:MM_FILEPAGES val:33 [ 33.184829] BUG: Bad rss-counter state mm:000000008c0c2c71 type:MM_ANONPAGES val:22 [ 33.662595] BUG: Bad rss-counter state mm:00000000e3103a15 type:MM_FILEPAGES val:33 [ 33.663500] BUG: Bad rss-counter state mm:00000000e3103a15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35373' (ECDSA) to the list of known hosts. 2023/06/20 16:54:53 fuzzer started 2023/06/20 16:54:54 dialing manager at localhost:36067 2023/06/20 16:54:54 checking machine... 2023/06/20 16:54:54 checking revisions... [ 34.409939] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:54:54 testing simple program... [ 34.464040] cgroup: Unknown subsys name 'net' [ 34.521486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:54:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8135ee78 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=0000000000000009 RBP=0000000000000001 RSP=ffff88806ce09c38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000001706159944 R12=ffffffff85d3d41c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8118dee4 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=00007f488210ab40 CR3=000000000d646000 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=dae6e90296ede3976941ea1b6d97cb09 XMM02=2c67c8bc2e329bc3000000000011b0c8 XMM03=fb795ef6d65770560000000000122530 XMM04=b10e2d694f7a99e100000000000ae988 XMM05=19e9129bd510f23500000000001323f0 XMM06=4fda316b135da52b0000000000132278 XMM07=e042d86d42eb936e00000000001227b0 XMM08=dc005d1a234f3621000000000011b128 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363b743 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001deff40 RSI=ffffffff8363b743 RDI=ffff88800ef7fa70 RBP=ffff88800ef7fa40 RSP=ffff88800ef7f9a0 R8 =0000000000000001 R9 =ffff88800ef7f9e8 R10=0000000000038001 R11=000000000008a95e R12=ffff88800ef7fa70 R13=0000000000000000 R14=ffff8880167a0000 R15=0000000000000cc0 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f4704324900 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=00007ffda7b9b000 CR3=00000000096e2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000