syzkaller login: [ 31.027522] BUG: Bad rss-counter state mm:00000000ada6125d type:MM_FILEPAGES val:33 [ 31.028431] BUG: Bad rss-counter state mm:00000000ada6125d type:MM_ANONPAGES val:22 [ 31.193898] ================================================================== [ 31.194998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.196118] Read of size 8 at addr ffff888019dacc20 by task sshd/221 [ 31.197242] [ 31.197494] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.198360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.199270] Call Trace: [ 31.199572] [ 31.199840] dump_stack_lvl+0x91/0xf0 [ 31.200306] print_report+0xcc/0x620 [ 31.200762] ? __virt_addr_valid+0x102/0x340 [ 31.201293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202456] kasan_report+0xbe/0xf0 [ 31.202913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203498] vma_interval_tree_remove+0xc75/0xec0 [ 31.204080] vma_prepare+0xc54/0x11a0 [ 31.204560] __split_vma+0x5af/0x950 [ 31.205028] ? __pfx___split_vma+0x10/0x10 [ 31.205562] ? find_held_lock+0x2c/0x110 [ 31.206081] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.206650] ? lock_is_held_type+0x9f/0x120 [ 31.207181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.207791] ? mtree_range_walk+0x632/0x900 [ 31.208341] ? mas_walk+0x5c7/0x7c0 [ 31.208817] do_vmi_munmap+0x1f1/0x2b0 [ 31.209329] mmap_region+0x1f9/0x2660 [ 31.209798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.211013] ? __pfx_lock_acquire+0x10/0x10 [ 31.211545] ? __pfx_mmap_region+0x10/0x10 [ 31.212071] ? security_mmap_addr+0x7d/0xa0 [ 31.212596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.213143] do_mmap+0x854/0xf00 [ 31.213577] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214072] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.214633] ksys_mmap_pgoff+0x3af/0x500 [ 31.215127] do_syscall_64+0x3f/0x90 [ 31.215594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216250] RIP: 0033:0x7f381f9edd82 [ 31.216704] 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 [ 31.218844] RSP: 002b:00007ffd7f6b7ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.219746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f381f9edd82 [ 31.220581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f381ee27000 [ 31.221438] RBP: 00007f381ee27000 R08: 0000000000000009 R09: 0000000000001000 [ 31.222274] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e9f3add90 [ 31.223114] R13: 00007ffd7f6b7ad0 R14: 00007ffd7f6b7b00 R15: 00007ffd7f6b7e60 [ 31.223972] [ 31.224259] [ 31.224472] Allocated by task 214: [ 31.224899] kasan_save_stack+0x22/0x50 [ 31.225430] kasan_set_track+0x25/0x30 [ 31.225926] __kasan_slab_alloc+0x59/0x70 [ 31.226442] kmem_cache_alloc+0x16b/0x370 [ 31.226961] vm_area_dup+0x20/0x160 [ 31.227405] __split_vma+0x170/0x950 [ 31.227869] split_vma+0xc6/0x110 [ 31.228306] mprotect_fixup+0x8d2/0xb30 [ 31.228806] do_mprotect_pkey+0x87e/0xd40 [ 31.229335] __x64_sys_mprotect+0x78/0xc0 [ 31.229856] do_syscall_64+0x3f/0x90 [ 31.230321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230958] [ 31.231170] Freed by task 204: [ 31.231554] kasan_save_stack+0x22/0x50 [ 31.232043] kasan_set_track+0x25/0x30 [ 31.232529] kasan_save_free_info+0x2b/0x50 [ 31.233060] __kasan_slab_free+0x10a/0x190 [ 31.233607] kmem_cache_free+0x10d/0x4d0 [ 31.234135] rcu_core+0x8c8/0x2860 [ 31.234591] __do_softirq+0x1b7/0x7d4 [ 31.235077] [ 31.235297] Last potentially related work creation: [ 31.235893] kasan_save_stack+0x22/0x50 [ 31.236403] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237685] remove_vma+0x139/0x170 [ 31.238152] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238836] do_vmi_munmap+0x1f1/0x2b0 [ 31.239333] __vm_munmap+0x138/0x3a0 [ 31.239811] __x64_sys_munmap+0x59/0x80 [ 31.240324] do_syscall_64+0x3f/0x90 [ 31.240801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241473] [ 31.241687] The buggy address belongs to the object at ffff888019dacbc8 [ 31.241687] which belongs to the cache vm_area_struct of size 168 [ 31.243203] The buggy address is located 88 bytes inside of [ 31.243203] freed 168-byte region [ffff888019dacbc8, ffff888019dacc70) [ 31.244648] [ 31.244873] The buggy address belongs to the physical page: [ 31.245548] page:00000000b9b854b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dac [ 31.246657] memcg:ffff88800e3b4a01 [ 31.247095] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.247742] page_type: 0xffffffff() [ 31.248200] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.249134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3b4a01 [ 31.250037] page dumped because: kasan: bad access detected [ 31.250707] [ 31.250930] Memory state around the buggy address: [ 31.251515] ffff888019dacb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.252380] ffff888019dacb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.253248] >ffff888019dacc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.254115] ^ [ 31.254653] ffff888019dacc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.255515] ffff888019dacd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.256397] ================================================================== [ 31.257330] Disabling lock debugging due to kernel taint [ 33.297872] BUG: Bad rss-counter state mm:0000000031c23cdf type:MM_FILEPAGES val:33 [ 33.298863] BUG: Bad rss-counter state mm:0000000031c23cdf type:MM_ANONPAGES val:22 [ 33.783031] BUG: Bad rss-counter state mm:000000000262ff44 type:MM_FILEPAGES val:33 [ 33.784203] BUG: Bad rss-counter state mm:000000000262ff44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36972' (ECDSA) to the list of known hosts. 2023/06/20 17:51:51 fuzzer started 2023/06/20 17:51:51 dialing manager at localhost:36067 2023/06/20 17:51:51 checking machine... 2023/06/20 17:51:51 checking revisions... [ 34.494461] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:51 testing simple program... [ 34.548255] cgroup: Unknown subsys name 'net' [ 34.596695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:51 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff817111ac RDX=ffff8880199b1b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ccffd90 RSP=ffff88800ccffc00 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006c4f40 R13=ffff888018e53910 R14=ffff88800ccffdb8 R15=ffffea00006c4f74 RIP=ffffffff817111b1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb8cc20e900 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=00007fb8cc7c5618 CR3=0000000019f3e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff1100d9e1353 RSI=ffffffff8180c6a2 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88806cf09a98 RIP=ffffffff811305f0 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 0000000000000000 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=00007f04db32d8d0 CR3=000000000ca62000 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=6caf147df646a5b5e64bb3ddae4f0086 XMM02=000000000011a1c0ec2efd57dc4c00df XMM03=0000000000121b08e22b563aeb9ff2ff XMM04=69f26fd6e0eff30e00000000000ae988 XMM05=3d497dc64ed655d00000000000131dc0 XMM06=c291bd5c70af25b900000000001317b8 XMM07=e042d86d42eb936e0000000000121d88 XMM08=e22b563aeb9ff2ff000000000011a220 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000