syzkaller login: [ 30.399066] BUG: Bad rss-counter state mm:0000000081bc71f4 type:MM_FILEPAGES val:33 [ 30.399968] BUG: Bad rss-counter state mm:0000000081bc71f4 type:MM_ANONPAGES val:22 [ 30.554380] ================================================================== [ 30.554988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.555580] Read of size 8 at addr ffff88800fd823f8 by task sshd/221 [ 30.556053] [ 30.556189] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.556718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.557298] Call Trace: [ 30.557486] [ 30.557648] dump_stack_lvl+0x91/0xf0 [ 30.557928] print_report+0xcc/0x620 [ 30.558230] ? __virt_addr_valid+0x102/0x340 [ 30.559370] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.559774] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.560210] kasan_report+0xbe/0xf0 [ 30.561425] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561836] vma_interval_tree_remove+0xc75/0xec0 [ 30.562319] vma_prepare+0xc54/0x11a0 [ 30.562613] __split_vma+0x5af/0x950 [ 30.562893] ? __pfx___split_vma+0x10/0x10 [ 30.563296] ? find_held_lock+0x2c/0x110 [ 30.563637] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.564077] ? lock_is_held_type+0x9f/0x120 [ 30.564397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.564762] ? mtree_range_walk+0x632/0x900 [ 30.565196] ? mas_walk+0x5c7/0x7c0 [ 30.565492] do_vmi_munmap+0x1f1/0x2b0 [ 30.565797] mmap_region+0x1f9/0x2660 [ 30.566206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.566542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.567325] ? __pfx_lock_acquire+0x10/0x10 [ 30.567664] ? __pfx_mmap_region+0x10/0x10 [ 30.568033] ? security_mmap_addr+0x7d/0xa0 [ 30.568442] ? get_unmapped_area+0x1f5/0x3f0 [ 30.568777] do_mmap+0x854/0xf00 [ 30.569132] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.569437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.569767] ksys_mmap_pgoff+0x3af/0x500 [ 30.570190] do_syscall_64+0x3f/0x90 [ 30.570470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.570956] RIP: 0033:0x7fedff78ad82 [ 30.571285] 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 [ 30.572649] RSP: 002b:00007ffe720c69b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.573327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedff78ad82 [ 30.573877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedfebc4000 [ 30.574486] RBP: 00007fedfebc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.575153] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e1e9e7ec0 [ 30.575689] R13: 00007ffe720c69d0 R14: 00007ffe720c6a00 R15: 00007ffe720c6d60 [ 30.576295] [ 30.576481] [ 30.576599] Allocated by task 212: [ 30.576861] kasan_save_stack+0x22/0x50 [ 30.577260] kasan_set_track+0x25/0x30 [ 30.577546] __kasan_slab_alloc+0x59/0x70 [ 30.577843] kmem_cache_alloc+0x16b/0x370 [ 30.578301] vm_area_dup+0x20/0x160 [ 30.578608] __split_vma+0x170/0x950 [ 30.578900] split_vma+0xc6/0x110 [ 30.579304] mprotect_fixup+0x8d2/0xb30 [ 30.579621] do_mprotect_pkey+0x87e/0xd40 [ 30.580002] __x64_sys_mprotect+0x78/0xc0 [ 30.580333] do_syscall_64+0x3f/0x90 [ 30.580635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.581093] [ 30.581232] Freed by task 212: [ 30.581474] kasan_save_stack+0x22/0x50 [ 30.581786] kasan_set_track+0x25/0x30 [ 30.582163] kasan_save_free_info+0x2b/0x50 [ 30.582500] __kasan_slab_free+0x10a/0x190 [ 30.582880] kmem_cache_free+0x10d/0x4d0 [ 30.583246] rcu_core+0x8c8/0x2860 [ 30.583527] __do_softirq+0x1b7/0x7d4 [ 30.583806] [ 30.584002] Last potentially related work creation: [ 30.584350] kasan_save_stack+0x22/0x50 [ 30.584652] __kasan_record_aux_stack+0x8e/0xa0 [ 30.585047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.585434] remove_vma+0x139/0x170 [ 30.585700] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.586095] do_vmi_munmap+0x1f1/0x2b0 [ 30.586399] __vm_munmap+0x138/0x3a0 [ 30.586691] __x64_sys_munmap+0x59/0x80 [ 30.587051] do_syscall_64+0x3f/0x90 [ 30.599270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599666] [ 30.599798] The buggy address belongs to the object at ffff88800fd823a0 [ 30.599798] which belongs to the cache vm_area_struct of size 168 [ 30.601263] The buggy address is located 88 bytes inside of [ 30.601263] freed 168-byte region [ffff88800fd823a0, ffff88800fd82448) [ 30.602200] [ 30.602335] The buggy address belongs to the physical page: [ 30.602834] page:000000000a972850 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd82 [ 30.606297] memcg:ffff8880101a6501 [ 30.606582] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.607538] page_type: 0xffffffff() [ 30.607817] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.608435] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101a6501 [ 30.609069] page dumped because: kasan: bad access detected [ 30.609475] [ 30.609614] Memory state around the buggy address: [ 30.610073] ffff88800fd82280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.610611] ffff88800fd82300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.611424] >ffff88800fd82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.612100] ^ [ 30.612628] ffff88800fd82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.613251] ffff88800fd82480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.613775] ================================================================== [ 30.622636] Disabling lock debugging due to kernel taint [ 34.965880] BUG: Bad rss-counter state mm:0000000084ac98c1 type:MM_FILEPAGES val:33 [ 34.966511] BUG: Bad rss-counter state mm:0000000084ac98c1 type:MM_ANONPAGES val:22 [ 36.075629] BUG: Bad rss-counter state mm:00000000aebf21ac type:MM_FILEPAGES val:33 [ 36.076638] BUG: Bad rss-counter state mm:00000000aebf21ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20387' (ECDSA) to the list of known hosts. 2023/06/21 10:12:09 fuzzer started 2023/06/21 10:12:10 dialing manager at localhost:36067 2023/06/21 10:12:10 checking machine... 2023/06/21 10:12:10 checking revisions... [ 37.126702] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:12:10 testing simple program... [ 37.178221] cgroup: Unknown subsys name 'net' [ 37.232863] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 10:12:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146c200c RCX=0000000000000000 RDX=ffff888016229b40 RSI=ffffffff844b7d1f RDI=ffff88800fe1fda8 RBP=dffffc0000000000 RSP=ffff88800fe1fd68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800fe7f0e8 R13=ffff88800fe1fe70 R14=ffffffffffffffff R15=1ffff11001fc3faf RIP=ffffffff84511dc0 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 00007f0dc3363900 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=0000559dbc167330 CR3=000000001b770000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=ffff888008c04400 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=00007fd9ec84d5b0 CR3=000000000d9dc000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=1b21d4167d16bce70000000000132c58 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=e89078e5d8c7c6fb00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000