syzkaller login: [ 42.009392] BUG: Bad rss-counter state mm:0000000086561724 type:MM_FILEPAGES val:33 [ 42.010815] BUG: Bad rss-counter state mm:0000000086561724 type:MM_ANONPAGES val:22 [ 42.182588] ================================================================== [ 42.183577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.184867] Read of size 8 at addr ffff88800e81d3f8 by task sshd/219 [ 42.185880] [ 42.186164] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.187299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.188580] Call Trace: [ 42.189033] [ 42.189392] dump_stack_lvl+0x91/0xf0 [ 42.190020] print_report+0xcc/0x620 [ 42.190640] ? __virt_addr_valid+0x102/0x340 [ 42.191351] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.192138] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.192930] kasan_report+0xbe/0xf0 [ 42.193523] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.194316] vma_interval_tree_remove+0xc75/0xec0 [ 42.195078] vma_prepare+0xc54/0x11a0 [ 42.195694] __split_vma+0x5af/0x950 [ 42.196287] ? __pfx___split_vma+0x10/0x10 [ 42.196963] ? find_held_lock+0x2c/0x110 [ 42.197618] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.198330] ? lock_is_held_type+0x9f/0x120 [ 42.199008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.199775] ? mtree_range_walk+0x632/0x900 [ 42.200474] ? mas_walk+0x5c7/0x7c0 [ 42.201005] do_vmi_munmap+0x1f1/0x2b0 [ 42.201521] mmap_region+0x1f9/0x2660 [ 42.202027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.202564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.203303] ? __pfx_lock_acquire+0x10/0x10 [ 42.203854] ? __pfx_mmap_region+0x10/0x10 [ 42.204455] ? security_mmap_addr+0x7d/0xa0 [ 42.205090] ? get_unmapped_area+0x1f5/0x3f0 [ 42.205794] do_mmap+0x854/0xf00 [ 42.206341] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.206975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.207711] ksys_mmap_pgoff+0x3af/0x500 [ 42.208341] do_syscall_64+0x3f/0x90 [ 42.208995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.209757] RIP: 0033:0x7f3bc9cabd82 [ 42.210225] 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 [ 42.212416] RSP: 002b:00007ffc01a2f358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.213359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bc9cabd82 [ 42.214231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bc90e5000 [ 42.215099] RBP: 00007f3bc90e5000 R08: 0000000000000009 R09: 0000000000001000 [ 42.215969] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654d4a21ec0 [ 42.216850] R13: 00007ffc01a2f370 R14: 00007ffc01a2f3a0 R15: 00007ffc01a2f700 [ 42.217724] [ 42.218029] [ 42.218291] Allocated by task 212: [ 42.218774] kasan_save_stack+0x22/0x50 [ 42.219316] kasan_set_track+0x25/0x30 [ 42.219831] __kasan_slab_alloc+0x59/0x70 [ 42.220384] kmem_cache_alloc+0x16b/0x370 [ 42.220952] vm_area_dup+0x20/0x160 [ 42.221435] __split_vma+0x170/0x950 [ 42.221931] split_vma+0xc6/0x110 [ 42.222399] mprotect_fixup+0x8d2/0xb30 [ 42.222941] do_mprotect_pkey+0x87e/0xd40 [ 42.223589] __x64_sys_mprotect+0x78/0xc0 [ 42.224192] do_syscall_64+0x3f/0x90 [ 42.224715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.225408] [ 42.225635] Freed by task 19: [ 42.226034] kasan_save_stack+0x22/0x50 [ 42.226548] kasan_set_track+0x25/0x30 [ 42.227058] kasan_save_free_info+0x2b/0x50 [ 42.227616] __kasan_slab_free+0x10a/0x190 [ 42.228163] kmem_cache_free+0x10d/0x4d0 [ 42.228689] rcu_core+0x8c8/0x2860 [ 42.229146] __do_softirq+0x1b7/0x7d4 [ 42.229630] [ 42.229848] Last potentially related work creation: [ 42.230448] kasan_save_stack+0x22/0x50 [ 42.230963] __kasan_record_aux_stack+0x8e/0xa0 [ 42.231543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.232196] remove_vma+0x139/0x170 [ 42.232677] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.233251] do_vmi_munmap+0x1f1/0x2b0 [ 42.233745] __vm_munmap+0x138/0x3a0 [ 42.234224] __x64_sys_munmap+0x59/0x80 [ 42.234739] do_syscall_64+0x3f/0x90 [ 42.235244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.235910] [ 42.236141] The buggy address belongs to the object at ffff88800e81d3a0 [ 42.236141] which belongs to the cache vm_area_struct of size 168 [ 42.237681] The buggy address is located 88 bytes inside of [ 42.237681] freed 168-byte region [ffff88800e81d3a0, ffff88800e81d448) [ 42.239144] [ 42.239366] The buggy address belongs to the physical page: [ 42.240050] page:00000000e113213e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe81d [ 42.241180] memcg:ffff88800ec86d01 [ 42.241623] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.242304] page_type: 0xffffffff() [ 42.242769] raw: 0100000000000200 ffff88800879fc80 ffffea000036f280 dead000000000002 [ 42.243738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec86d01 [ 42.244681] page dumped because: kasan: bad access detected [ 42.245363] [ 42.245582] Memory state around the buggy address: [ 42.246178] ffff88800e81d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.247048] ffff88800e81d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.247914] >ffff88800e81d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.248785] ^ [ 42.249645] ffff88800e81d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.250512] ffff88800e81d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.251382] ================================================================== [ 42.252359] Disabling lock debugging due to kernel taint [ 44.381936] BUG: Bad rss-counter state mm:000000006bf9bc46 type:MM_FILEPAGES val:33 [ 44.383102] BUG: Bad rss-counter state mm:000000006bf9bc46 type:MM_ANONPAGES val:22 [ 44.744943] BUG: Bad rss-counter state mm:000000006d8bf2b8 type:MM_FILEPAGES val:33 [ 44.745846] BUG: Bad rss-counter state mm:000000006d8bf2b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51185' (ECDSA) to the list of known hosts. 2023/06/20 06:51:20 fuzzer started 2023/06/20 06:51:21 dialing manager at localhost:44161 2023/06/20 06:51:21 checking machine... 2023/06/20 06:51:21 checking revisions... [ 45.538669] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:51:21 testing simple program... [ 45.592863] cgroup: Unknown subsys name 'net' [ 45.646121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:51:17 Registers: info registers vcpu 0 RAX=1ffff11001a85fb5 RBX=ffff88800d42fd78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d42fda8 RBP=ffff88800e54b450 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e54b2e0 R14=ffffffff813782a8 R15=ffff88800e54b2e0 RIP=ffffffff81846362 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 00007f72e9205900 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=00007f72e8631350 CR3=000000000cb88000 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=3672712e5511998a3c4c9e00438d50fd XMM02=000000000011df38eff9b2d0a8fce9cb XMM03=000000000011e0082c67c8bc2e329bc3 XMM04=cfd1f4a1b51d7d3400000000000ae988 XMM05=83dd420868b44de300000000001352a8 XMM06=e4397a55312e12ef0000000000134350 XMM07=fb795ef6d657705600000000001241b0 XMM08=2c67c8bc2e329bc3000000000011dfa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888009a08000 RSI=ffff8880180b0b40 RDI=ffff88800d345400 RBP=ffff88800d345400 RSP=ffff8880166b7ed8 R8 =0000000000000003 R9 =0000000000004000 R10=000000000000c000 R11=0000000000000000 R12=ffff8880180b0b40 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff819cde34 RFL=00000293 [--S-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 00007f1a39206900 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=00007ffe9cb08000 CR3=000000000fc0a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000