syzkaller login: [ 30.541555] BUG: Bad rss-counter state mm:00000000c708631f type:MM_FILEPAGES val:33 [ 30.543004] BUG: Bad rss-counter state mm:00000000c708631f type:MM_ANONPAGES val:22 [ 30.713538] ================================================================== [ 30.714489] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715462] Read of size 8 at addr ffff88801aa0a968 by task sshd/221 [ 30.716312] [ 30.716567] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.717464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.718515] Call Trace: [ 30.718852] [ 30.719148] dump_stack_lvl+0x91/0xf0 [ 30.719661] print_report+0xcc/0x620 [ 30.720168] ? __virt_addr_valid+0x102/0x340 [ 30.720747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722035] kasan_report+0xbe/0xf0 [ 30.722541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723239] vma_interval_tree_remove+0xc75/0xec0 [ 30.723912] vma_prepare+0xc54/0x11a0 [ 30.724455] __split_vma+0x5af/0x950 [ 30.724996] ? __pfx___split_vma+0x10/0x10 [ 30.725594] ? find_held_lock+0x2c/0x110 [ 30.726182] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.726807] ? lock_is_held_type+0x9f/0x120 [ 30.727417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.728107] ? mtree_range_walk+0x632/0x900 [ 30.728728] ? mas_walk+0x5c7/0x7c0 [ 30.729266] do_vmi_munmap+0x1f1/0x2b0 [ 30.729818] mmap_region+0x1f9/0x2660 [ 30.730383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.730958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.731755] ? __pfx_lock_acquire+0x10/0x10 [ 30.732358] ? __pfx_mmap_region+0x10/0x10 [ 30.732948] ? security_mmap_addr+0x7d/0xa0 [ 30.733549] ? get_unmapped_area+0x1f5/0x3f0 [ 30.734173] do_mmap+0x854/0xf00 [ 30.734668] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.735222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.735850] ksys_mmap_pgoff+0x3af/0x500 [ 30.736422] do_syscall_64+0x3f/0x90 [ 30.736948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737683] RIP: 0033:0x7fc90ec71d82 [ 30.738196] 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 [ 30.740615] RSP: 002b:00007ffea008c1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.741631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc90ec71d82 [ 30.742628] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc90e0ab000 [ 30.743708] RBP: 00007fc90e0ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.744658] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ea2185d90 [ 30.745597] R13: 00007ffea008c1f0 R14: 00007ffea008c220 R15: 00007ffea008c580 [ 30.746560] [ 30.746883] [ 30.747124] Allocated by task 214: [ 30.747595] kasan_save_stack+0x22/0x50 [ 30.748158] kasan_set_track+0x25/0x30 [ 30.748708] __kasan_slab_alloc+0x59/0x70 [ 30.749286] kmem_cache_alloc+0x16b/0x370 [ 30.749852] vm_area_dup+0x20/0x160 [ 30.750364] __split_vma+0x170/0x950 [ 30.750881] split_vma+0xc6/0x110 [ 30.751373] mprotect_fixup+0x8d2/0xb30 [ 30.751929] do_mprotect_pkey+0x87e/0xd40 [ 30.752514] __x64_sys_mprotect+0x78/0xc0 [ 30.753097] do_syscall_64+0x3f/0x90 [ 30.753627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754363] [ 30.754600] Freed by task 19: [ 30.755024] kasan_save_stack+0x22/0x50 [ 30.755586] kasan_set_track+0x25/0x30 [ 30.756134] kasan_save_free_info+0x2b/0x50 [ 30.756724] __kasan_slab_free+0x10a/0x190 [ 30.757313] kmem_cache_free+0x10d/0x4d0 [ 30.757875] rcu_core+0x8c8/0x2860 [ 30.758379] __do_softirq+0x1b7/0x7d4 [ 30.758907] [ 30.759148] Last potentially related work creation: [ 30.759806] kasan_save_stack+0x22/0x50 [ 30.760376] __kasan_record_aux_stack+0x8e/0xa0 [ 30.761017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761736] remove_vma+0x139/0x170 [ 30.762269] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762887] do_vmi_munmap+0x1f1/0x2b0 [ 30.763434] __vm_munmap+0x138/0x3a0 [ 30.763963] __x64_sys_munmap+0x59/0x80 [ 30.764522] do_syscall_64+0x3f/0x90 [ 30.765036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765729] [ 30.765958] The buggy address belongs to the object at ffff88801aa0a910 [ 30.765958] which belongs to the cache vm_area_struct of size 168 [ 30.767558] The buggy address is located 88 bytes inside of [ 30.767558] freed 168-byte region [ffff88801aa0a910, ffff88801aa0a9b8) [ 30.769066] [ 30.769313] The buggy address belongs to the physical page: [ 30.770032] page:00000000271312af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa0a [ 30.771237] memcg:ffff88800b399601 [ 30.771707] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772414] page_type: 0xffffffff() [ 30.772906] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.773889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b399601 [ 30.774879] page dumped because: kasan: bad access detected [ 30.775617] [ 30.775854] Memory state around the buggy address: [ 30.776501] ffff88801aa0a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.777448] ffff88801aa0a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.778399] >ffff88801aa0a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.779347] ^ [ 30.780214] ffff88801aa0a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.781161] ffff88801aa0aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.782100] ================================================================== [ 30.783287] Disabling lock debugging due to kernel taint [ 32.636884] BUG: Bad rss-counter state mm:0000000019d977f9 type:MM_FILEPAGES val:33 [ 32.638147] BUG: Bad rss-counter state mm:0000000019d977f9 type:MM_ANONPAGES val:22 [ 33.135107] BUG: Bad rss-counter state mm:000000002a512d4e type:MM_FILEPAGES val:33 [ 33.136092] BUG: Bad rss-counter state mm:000000002a512d4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13086' (ECDSA) to the list of known hosts. 2023/06/20 15:03:19 fuzzer started 2023/06/20 15:03:19 dialing manager at localhost:36067 2023/06/20 15:03:19 checking machine... 2023/06/20 15:03:19 checking revisions... [ 33.903844] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:03:19 testing simple program... [ 33.949189] cgroup: Unknown subsys name 'net' [ 33.999024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:03:19 Registers: info registers vcpu 0 RAX=ffffffff864b6d1f RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09f80 R15=ffff88806ce09a98 RIP=ffffffff81130b8f RFL=00000297 [--S-APC] 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=00007f54ccb44740 CR3=000000000c806000 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=5091434bb51b0ea0354948dde1bb0075 XMM02=2c67c8bc2e329bc3000000000011a9a8 XMM03=fb795ef6d65770560000000000122328 XMM04=46113cbfd203ccb500000000000ae988 XMM05=24ae63e9e47a12ac0000000000132f58 XMM06=c291bd5c70af25b90000000000131ff8 XMM07=e042d86d42eb936e00000000001225a8 XMM08=bf737be2a12cb0b2000000000011aa08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800da57000 RCX=ffff88800844f780 RDX=ffffea00003b3440 RSI=ffff88800f2e0500 RDI=ffff8880087b8780 RBP=0000000000000000 RSP=ffff888016c67448 R8 =ffff88800ecd1390 R9 =0000000000000000 R10=ffffea00003cb800 R11=00000000800c0005 R12=dffffc0000000000 R13=ffff888016c67488 R14=ffff88800844f780 R15=ffff88800f2e0500 RIP=ffffffff81810316 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 00007f4d6f817900 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=00007f4d6fdce618 CR3=000000001bd26000 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