syzkaller login: [ 31.013894] BUG: Bad rss-counter state mm:00000000995aaa58 type:MM_FILEPAGES val:33 [ 31.015023] BUG: Bad rss-counter state mm:00000000995aaa58 type:MM_ANONPAGES val:22 [ 31.178657] ================================================================== [ 31.179567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.180493] Read of size 8 at addr ffff88800ee00a50 by task sshd/220 [ 31.181259] [ 31.181574] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.182446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.183426] Call Trace: [ 31.183754] [ 31.184044] dump_stack_lvl+0x91/0xf0 [ 31.184539] print_report+0xcc/0x620 [ 31.185024] ? __virt_addr_valid+0x102/0x340 [ 31.185579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186193] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186815] kasan_report+0xbe/0xf0 [ 31.187294] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187919] vma_interval_tree_remove+0xc75/0xec0 [ 31.188518] vma_prepare+0xc54/0x11a0 [ 31.188999] __split_vma+0x5af/0x950 [ 31.189474] ? __pfx___split_vma+0x10/0x10 [ 31.190021] ? find_held_lock+0x2c/0x110 [ 31.190539] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.191107] ? lock_is_held_type+0x9f/0x120 [ 31.191652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.192259] ? mtree_range_walk+0x632/0x900 [ 31.192813] ? mas_walk+0x5c7/0x7c0 [ 31.193287] do_vmi_munmap+0x1f1/0x2b0 [ 31.193789] mmap_region+0x1f9/0x2660 [ 31.194275] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.194790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.195500] ? __pfx_lock_acquire+0x10/0x10 [ 31.196027] ? __pfx_mmap_region+0x10/0x10 [ 31.196554] ? security_mmap_addr+0x7d/0xa0 [ 31.197086] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197653] do_mmap+0x854/0xf00 [ 31.198094] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.199158] ksys_mmap_pgoff+0x3af/0x500 [ 31.199669] do_syscall_64+0x3f/0x90 [ 31.200146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200797] RIP: 0033:0x7fa55b5f4d82 [ 31.201251] 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 [ 31.203378] RSP: 002b:00007fffe3904088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.204280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa55b5f4d82 [ 31.205125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa55aa2e000 [ 31.205979] RBP: 00007fa55aa2e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.206817] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b9138dec0 [ 31.207657] R13: 00007fffe39040a0 R14: 00007fffe39040d0 R15: 00007fffe3904430 [ 31.208513] [ 31.208804] [ 31.209023] Allocated by task 213: [ 31.209447] kasan_save_stack+0x22/0x50 [ 31.209966] kasan_set_track+0x25/0x30 [ 31.210462] __kasan_slab_alloc+0x59/0x70 [ 31.210984] kmem_cache_alloc+0x16b/0x370 [ 31.211499] vm_area_dup+0x20/0x160 [ 31.211952] __split_vma+0x170/0x950 [ 31.212419] split_vma+0xc6/0x110 [ 31.212862] mprotect_fixup+0x8d2/0xb30 [ 31.213364] do_mprotect_pkey+0x87e/0xd40 [ 31.213899] __x64_sys_mprotect+0x78/0xc0 [ 31.214420] do_syscall_64+0x3f/0x90 [ 31.214900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215542] [ 31.215761] Freed by task 210: [ 31.216153] kasan_save_stack+0x22/0x50 [ 31.216661] kasan_set_track+0x25/0x30 [ 31.217155] kasan_save_free_info+0x2b/0x50 [ 31.217702] __kasan_slab_free+0x10a/0x190 [ 31.218233] kmem_cache_free+0x10d/0x4d0 [ 31.218757] rcu_core+0x8c8/0x2860 [ 31.219198] __do_softirq+0x1b7/0x7d4 [ 31.219674] [ 31.219894] Last potentially related work creation: [ 31.220474] kasan_save_stack+0x22/0x50 [ 31.220979] __kasan_record_aux_stack+0x8e/0xa0 [ 31.221570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.222214] remove_vma+0x139/0x170 [ 31.222674] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.223235] do_vmi_munmap+0x1f1/0x2b0 [ 31.223722] __vm_munmap+0x138/0x3a0 [ 31.224190] __x64_sys_munmap+0x59/0x80 [ 31.224684] do_syscall_64+0x3f/0x90 [ 31.225159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225819] [ 31.226039] Second to last potentially related work creation: [ 31.226721] kasan_save_stack+0x22/0x50 [ 31.227225] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228445] remove_vma+0x139/0x170 [ 31.228899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229460] do_vmi_munmap+0x1f1/0x2b0 [ 31.229953] mmap_region+0x1f9/0x2660 [ 31.230425] do_mmap+0x854/0xf00 [ 31.230861] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.231352] ksys_mmap_pgoff+0x3af/0x500 [ 31.231859] do_syscall_64+0x3f/0x90 [ 31.232336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232978] [ 31.233196] The buggy address belongs to the object at ffff88800ee009f8 [ 31.233196] which belongs to the cache vm_area_struct of size 168 [ 31.234672] The buggy address is located 88 bytes inside of [ 31.234672] freed 168-byte region [ffff88800ee009f8, ffff88800ee00aa0) [ 31.236064] [ 31.236284] The buggy address belongs to the physical page: [ 31.236936] page:000000002b2e531a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee00 [ 31.238024] memcg:ffff88800c97db01 [ 31.238444] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239093] page_type: 0xffffffff() [ 31.239551] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bdc0 dead000000000004 [ 31.240460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c97db01 [ 31.241355] page dumped because: kasan: bad access detected [ 31.242029] [ 31.242246] Memory state around the buggy address: [ 31.242824] ffff88800ee00900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243670] ffff88800ee00980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.244526] >ffff88800ee00a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.245366] ^ [ 31.246083] ffff88800ee00a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.246935] ffff88800ee00b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.247785] ================================================================== [ 31.248779] Disabling lock debugging due to kernel taint [ 33.268851] BUG: Bad rss-counter state mm:000000007b040607 type:MM_FILEPAGES val:33 [ 33.270049] BUG: Bad rss-counter state mm:000000007b040607 type:MM_ANONPAGES val:22 [ 33.631723] BUG: Bad rss-counter state mm:00000000c69c7e86 type:MM_FILEPAGES val:33 [ 33.632719] BUG: Bad rss-counter state mm:00000000c69c7e86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15608' (ECDSA) to the list of known hosts. 2023/06/21 05:32:33 fuzzer started 2023/06/21 05:32:33 dialing manager at localhost:36067 2023/06/21 05:32:33 checking machine... 2023/06/21 05:32:33 checking revisions... [ 34.404220] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:32:33 testing simple program... [ 34.463214] cgroup: Unknown subsys name 'net' [ 34.543373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:32:32 Registers: info registers vcpu 0 RAX=1ffffffff0f6fce8 RBX=0000000000000002 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8114320f RDI=0000000000000006 RBP=0000000015a01120 RSP=ffff888013fbfca8 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffffffff85d3e300 RIP=ffffffff81143228 RFL=00000246 [---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 00007fd2cf1e1900 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=00007fd2ce665960 CR3=0000000006824000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=95cb6c67162e30f200000000000ae988 XMM05=8279c1f8b47d27120000000000134c48 XMM06=4fda316b135da52b0000000000133a38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888013ff3c60 RCX=ffffffff81370ce8 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806cf3a2c0 RBP=0000000000000200 RSP=ffff88800ffb7700 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806cf35000 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81370d0d RFL=00000082 [--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 00007ff4e2a21900 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=00007ff4e2fd8618 CR3=000000000f55c000 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