syzkaller login: [ 32.031724] BUG: Bad rss-counter state mm:000000007c698942 type:MM_FILEPAGES val:33 [ 32.033244] BUG: Bad rss-counter state mm:000000007c698942 type:MM_ANONPAGES val:22 [ 32.205572] ================================================================== [ 32.206497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.207432] Read of size 8 at addr ffff88800d695c20 by task sshd/221 [ 32.208229] [ 32.208567] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.209425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.210387] Call Trace: [ 32.210725] [ 32.211006] dump_stack_lvl+0x91/0xf0 [ 32.211490] print_report+0xcc/0x620 [ 32.211975] ? __virt_addr_valid+0x102/0x340 [ 32.212527] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.213138] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.213753] kasan_report+0xbe/0xf0 [ 32.214226] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.214841] vma_interval_tree_remove+0xc75/0xec0 [ 32.215446] vma_prepare+0xc54/0x11a0 [ 32.215928] __split_vma+0x5af/0x950 [ 32.216403] ? __pfx___split_vma+0x10/0x10 [ 32.216929] ? find_held_lock+0x2c/0x110 [ 32.217447] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.218018] ? lock_is_held_type+0x9f/0x120 [ 32.218555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.219162] ? mtree_range_walk+0x632/0x900 [ 32.219711] ? mas_walk+0x5c7/0x7c0 [ 32.220206] do_vmi_munmap+0x1f1/0x2b0 [ 32.220701] mmap_region+0x1f9/0x2660 [ 32.221189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.221699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.222411] ? __pfx_lock_acquire+0x10/0x10 [ 32.222945] ? __pfx_mmap_region+0x10/0x10 [ 32.223469] ? security_mmap_addr+0x7d/0xa0 [ 32.224012] ? get_unmapped_area+0x1f5/0x3f0 [ 32.224571] do_mmap+0x854/0xf00 [ 32.225012] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.225506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.226076] ksys_mmap_pgoff+0x3af/0x500 [ 32.226585] do_syscall_64+0x3f/0x90 [ 32.227063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.227716] RIP: 0033:0x7ff47155dd82 [ 32.228184] 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 [ 32.230323] RSP: 002b:00007ffd238c7d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.231235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff47155dd82 [ 32.232096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff470997000 [ 32.232938] RBP: 00007ff470997000 R08: 0000000000000009 R09: 0000000000001000 [ 32.233781] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e78229d90 [ 32.234622] R13: 00007ffd238c7d70 R14: 00007ffd238c7da0 R15: 00007ffd238c8100 [ 32.235472] [ 32.235765] [ 32.235985] Allocated by task 214: [ 32.236412] kasan_save_stack+0x22/0x50 [ 32.236917] kasan_set_track+0x25/0x30 [ 32.237407] __kasan_slab_alloc+0x59/0x70 [ 32.237931] kmem_cache_alloc+0x16b/0x370 [ 32.238453] vm_area_dup+0x20/0x160 [ 32.238901] __split_vma+0x170/0x950 [ 32.239374] split_vma+0xc6/0x110 [ 32.239819] mprotect_fixup+0x8d2/0xb30 [ 32.240347] do_mprotect_pkey+0x87e/0xd40 [ 32.240878] __x64_sys_mprotect+0x78/0xc0 [ 32.241395] do_syscall_64+0x3f/0x90 [ 32.241869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.242518] [ 32.242732] Freed by task 13: [ 32.243114] kasan_save_stack+0x22/0x50 [ 32.243617] kasan_set_track+0x25/0x30 [ 32.244126] kasan_save_free_info+0x2b/0x50 [ 32.244658] __kasan_slab_free+0x10a/0x190 [ 32.245194] kmem_cache_free+0x10d/0x4d0 [ 32.245703] rcu_core+0x8c8/0x2860 [ 32.246142] __do_softirq+0x1b7/0x7d4 [ 32.246625] [ 32.246837] Last potentially related work creation: [ 32.247424] kasan_save_stack+0x22/0x50 [ 32.247934] __kasan_record_aux_stack+0x8e/0xa0 [ 32.248511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.249161] remove_vma+0x139/0x170 [ 32.249617] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.250176] do_vmi_munmap+0x1f1/0x2b0 [ 32.250658] __vm_munmap+0x138/0x3a0 [ 32.251124] __x64_sys_munmap+0x59/0x80 [ 32.251620] do_syscall_64+0x3f/0x90 [ 32.252109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.252754] [ 32.252974] The buggy address belongs to the object at ffff88800d695bc8 [ 32.252974] which belongs to the cache vm_area_struct of size 168 [ 32.254452] The buggy address is located 88 bytes inside of [ 32.254452] freed 168-byte region [ffff88800d695bc8, ffff88800d695c70) [ 32.255869] [ 32.256091] The buggy address belongs to the physical page: [ 32.256753] page:00000000528ee7bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd695 [ 32.257840] memcg:ffff8880185d8d01 [ 32.258261] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.258909] page_type: 0xffffffff() [ 32.259355] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.260296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880185d8d01 [ 32.261209] page dumped because: kasan: bad access detected [ 32.261871] [ 32.262083] Memory state around the buggy address: [ 32.262664] ffff88800d695b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.263522] ffff88800d695b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.264380] >ffff88800d695c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.265228] ^ [ 32.265753] ffff88800d695c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.266606] ffff88800d695d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.267462] ================================================================== [ 32.268604] Disabling lock debugging due to kernel taint [ 34.747316] BUG: Bad rss-counter state mm:00000000d4513e58 type:MM_FILEPAGES val:33 [ 34.748348] BUG: Bad rss-counter state mm:00000000d4513e58 type:MM_ANONPAGES val:22 [ 35.269520] BUG: Bad rss-counter state mm:000000005d7eb5d3 type:MM_FILEPAGES val:33 [ 35.270682] BUG: Bad rss-counter state mm:000000005d7eb5d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12717' (ECDSA) to the list of known hosts. 2023/06/19 20:43:57 fuzzer started 2023/06/19 20:43:57 dialing manager at localhost:44161 2023/06/19 20:43:57 checking machine... 2023/06/19 20:43:57 checking revisions... [ 35.979219] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:43:58 testing simple program... [ 36.025548] cgroup: Unknown subsys name 'net' [ 36.086752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fb019ef3958 CR3=000000000db82000 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=2037353a33343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33343a3032203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7b136f6618 CR3=000000000db82000 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=33343a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000