syzkaller login: [ 59.861003] BUG: Bad rss-counter state mm:00000000160bf6dc type:MM_FILEPAGES val:33 [ 59.862020] BUG: Bad rss-counter state mm:00000000160bf6dc type:MM_ANONPAGES val:22 [ 60.016983] ================================================================== [ 60.017931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.018867] Read of size 8 at addr ffff888019cb56b0 by task sshd/222 [ 60.019667] [ 60.020029] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.020908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.021902] Call Trace: [ 60.022248] <TASK> [ 60.022542] dump_stack_lvl+0x91/0xf0 [ 60.023046] print_report+0xcc/0x620 [ 60.023535] ? __virt_addr_valid+0x102/0x340 [ 60.024092] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.024717] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.025343] kasan_report+0xbe/0xf0 [ 60.025826] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.026493] vma_interval_tree_remove+0xc75/0xec0 [ 60.027106] vma_prepare+0xc54/0x11a0 [ 60.027589] __split_vma+0x5af/0x950 [ 60.028075] ? __pfx___split_vma+0x10/0x10 [ 60.028616] ? find_held_lock+0x2c/0x110 [ 60.029154] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.029743] ? lock_is_held_type+0x9f/0x120 [ 60.030325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.030961] ? mtree_range_walk+0x632/0x900 [ 60.031542] ? mas_walk+0x5c7/0x7c0 [ 60.032043] do_vmi_munmap+0x1f1/0x2b0 [ 60.032557] mmap_region+0x1f9/0x2660 [ 60.033064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.033601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.034368] ? __pfx_lock_acquire+0x10/0x10 [ 60.034929] ? __pfx_mmap_region+0x10/0x10 [ 60.035487] ? security_mmap_addr+0x7d/0xa0 [ 60.036047] ? get_unmapped_area+0x1f5/0x3f0 [ 60.036623] do_mmap+0x854/0xf00 [ 60.037082] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.037602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.038193] ksys_mmap_pgoff+0x3af/0x500 [ 60.038739] do_syscall_64+0x3f/0x90 [ 60.039241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.039919] RIP: 0033:0x7fb5f7c77d82 [ 60.040396] 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 [ 60.042661] RSP: 002b:00007ffcd70810b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.043609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5f7c77d82 [ 60.044501] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5f70b1000 [ 60.045393] RBP: 00007fb5f70b1000 R08: 0000000000000009 R09: 0000000000001000 [ 60.046304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2c507cec0 [ 60.047195] R13: 00007ffcd70810d0 R14: 00007ffcd7081100 R15: 00007ffcd7081460 [ 60.048097] </TASK> [ 60.048406] [ 60.048631] Allocated by task 215: [ 60.049076] kasan_save_stack+0x22/0x50 [ 60.049607] kasan_set_track+0x25/0x30 [ 60.050117] __kasan_slab_alloc+0x59/0x70 [ 60.050677] kmem_cache_alloc+0x16b/0x370 [ 60.051218] vm_area_dup+0x20/0x160 [ 60.051699] __split_vma+0x170/0x950 [ 60.052186] split_vma+0xc6/0x110 [ 60.052649] mprotect_fixup+0x8d2/0xb30 [ 60.053173] do_mprotect_pkey+0x87e/0xd40 [ 60.053828] __x64_sys_mprotect+0x78/0xc0 [ 60.054374] do_syscall_64+0x3f/0x90 [ 60.054853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.055503] [ 60.055720] Freed by task 215: [ 60.056114] kasan_save_stack+0x22/0x50 [ 60.056623] kasan_set_track+0x25/0x30 [ 60.057118] kasan_save_free_info+0x2b/0x50 [ 60.057654] __kasan_slab_free+0x10a/0x190 [ 60.058189] kmem_cache_free+0x10d/0x4d0 [ 60.058713] rcu_core+0x8c8/0x2860 [ 60.059158] __do_softirq+0x1b7/0x7d4 [ 60.059640] [ 60.059857] Last potentially related work creation: [ 60.060445] kasan_save_stack+0x22/0x50 [ 60.060951] __kasan_record_aux_stack+0x8e/0xa0 [ 60.061527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.062174] remove_vma+0x139/0x170 [ 60.062648] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.063208] do_vmi_munmap+0x1f1/0x2b0 [ 60.063697] __vm_munmap+0x138/0x3a0 [ 60.064168] __x64_sys_munmap+0x59/0x80 [ 60.064667] do_syscall_64+0x3f/0x90 [ 60.065151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.065800] [ 60.066017] The buggy address belongs to the object at ffff888019cb5658 [ 60.066017] which belongs to the cache vm_area_struct of size 168 [ 60.067506] The buggy address is located 88 bytes inside of [ 60.067506] freed 168-byte region [ffff888019cb5658, ffff888019cb5700) [ 60.068924] [ 60.069143] The buggy address belongs to the physical page: [ 60.069807] page:000000001e9e7fc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cb5 [ 60.070985] memcg:ffff88800e32e301 [ 60.071415] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.072059] page_type: 0xffffffff() [ 60.072508] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.073431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32e301 [ 60.074366] page dumped because: kasan: bad access detected [ 60.075028] [ 60.075253] Memory state around the buggy address: [ 60.075974] ffff888019cb5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.077029] ffff888019cb5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.078088] >ffff888019cb5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.079142] ^ [ 60.079860] ffff888019cb5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.080917] ffff888019cb5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.081966] ================================================================== [ 60.083336] Disabling lock debugging due to kernel taint [ 62.268971] BUG: Bad rss-counter state mm:00000000b43cf33e type:MM_FILEPAGES val:33 [ 62.269852] BUG: Bad rss-counter state mm:00000000b43cf33e type:MM_ANONPAGES val:22 [ 62.737750] BUG: Bad rss-counter state mm:0000000006870454 type:MM_FILEPAGES val:33 [ 62.738815] BUG: Bad rss-counter state mm:0000000006870454 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33696' (ECDSA) to the list of known hosts. 2023/06/20 16:55:09 fuzzer started 2023/06/20 16:55:09 dialing manager at localhost:36067 2023/06/20 16:55:09 checking machine... 2023/06/20 16:55:09 checking revisions... [ 63.477437] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:55:09 testing simple program... [ 63.532983] cgroup: Unknown subsys name 'net' [ 63.584674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:08 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800e93e720 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff88800e93e720 RBP=ffffffff848ff1e0 RSP=ffff88800f217b70 R8 =ffff88800f217b80 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800e93e720 R13=ffff888016e8b680 R14=ffff88800e93e768 R15=ffff88800e93e720 RIP=ffffffff812c9518 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 00007f0de10b1900 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=00007f0de1668618 CR3=000000000ecba000 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=2038303a35353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a35353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fef17a831d0 CR3=000000000c5c0000 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=abae8996857114ad374448b6fc188468 XMM02=ec2efd57dc4c00df000000000011ad80 XMM03=0f2b518edc874282000000000011ae50 XMM04=74c411b7f2ca063f00000000000ae988 XMM05=59d5b690e0af863b00000000001325d8 XMM06=3ea92fa780decac90000000000131440 XMM07=e042d86d42eb936e00000000001229f0 XMM08=0f2b518edc874282000000000011ae50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000