syzkaller login: [ 31.415565] BUG: Bad rss-counter state mm:00000000d8611ac0 type:MM_FILEPAGES val:33 [ 31.416798] BUG: Bad rss-counter state mm:00000000d8611ac0 type:MM_ANONPAGES val:22 [ 31.463453] ================================================================== [ 31.464457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.465584] Read of size 8 at addr ffff888019806df0 by task sshd/221 [ 31.466627] [ 31.466878] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.467892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.469005] Call Trace: [ 31.469348] [ 31.469663] dump_stack_lvl+0x91/0xf0 [ 31.470268] print_report+0xcc/0x620 [ 31.470899] ? __virt_addr_valid+0x102/0x340 [ 31.471552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472881] kasan_report+0xbe/0xf0 [ 31.473405] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.474093] vma_interval_tree_remove+0xc75/0xec0 [ 31.474752] vma_prepare+0xc54/0x11a0 [ 31.475277] __split_vma+0x5af/0x950 [ 31.475792] ? __pfx___split_vma+0x10/0x10 [ 31.476372] ? find_held_lock+0x2c/0x110 [ 31.476939] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.477560] ? lock_is_held_type+0x9f/0x120 [ 31.478169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.478838] ? mtree_range_walk+0x632/0x900 [ 31.479446] ? mas_walk+0x5c7/0x7c0 [ 31.479967] do_vmi_munmap+0x1f1/0x2b0 [ 31.480503] mmap_region+0x1f9/0x2660 [ 31.481024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.481584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.482380] ? __pfx_lock_acquire+0x10/0x10 [ 31.482966] ? __pfx_mmap_region+0x10/0x10 [ 31.483544] ? security_mmap_addr+0x7d/0xa0 [ 31.484128] ? get_unmapped_area+0x1f5/0x3f0 [ 31.484728] do_mmap+0x854/0xf00 [ 31.485210] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.485770] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.486391] ksys_mmap_pgoff+0x3af/0x500 [ 31.486950] do_syscall_64+0x3f/0x90 [ 31.487478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.488187] RIP: 0033:0x7fd598e70d82 [ 31.488686] 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 [ 31.491041] RSP: 002b:00007ffc15c83ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.492035] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd598e70d82 [ 31.492966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5982aa000 [ 31.493895] RBP: 00007fd5982aa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.494831] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558dd2add980 [ 31.495757] R13: 00007ffc15c83ae0 R14: 00007ffc15c83b10 R15: 00007ffc15c83e70 [ 31.496704] [ 31.497029] [ 31.497264] Allocated by task 214: [ 31.497757] kasan_save_stack+0x22/0x50 [ 31.498315] kasan_set_track+0x25/0x30 [ 31.498854] __kasan_slab_alloc+0x59/0x70 [ 31.499432] kmem_cache_alloc+0x16b/0x370 [ 31.499996] vm_area_dup+0x20/0x160 [ 31.500490] __split_vma+0x170/0x950 [ 31.500998] split_vma+0xc6/0x110 [ 31.501480] mprotect_fixup+0x8d2/0xb30 [ 31.502030] do_mprotect_pkey+0x87e/0xd40 [ 31.502605] __x64_sys_mprotect+0x78/0xc0 [ 31.503179] do_syscall_64+0x3f/0x90 [ 31.503704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.504408] [ 31.504638] Freed by task 13: [ 31.505099] kasan_save_stack+0x22/0x50 [ 31.505651] kasan_set_track+0x25/0x30 [ 31.506211] kasan_save_free_info+0x2b/0x50 [ 31.506793] __kasan_slab_free+0x10a/0x190 [ 31.507378] kmem_cache_free+0x10d/0x4d0 [ 31.507933] rcu_core+0x8c8/0x2860 [ 31.508424] __do_softirq+0x1b7/0x7d4 [ 31.508940] [ 31.509171] Last potentially related work creation: [ 31.509802] kasan_save_stack+0x22/0x50 [ 31.510351] __kasan_record_aux_stack+0x8e/0xa0 [ 31.510975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.511672] remove_vma+0x139/0x170 [ 31.512155] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.512767] do_vmi_munmap+0x1f1/0x2b0 [ 31.513297] __vm_munmap+0x138/0x3a0 [ 31.513813] __x64_sys_munmap+0x59/0x80 [ 31.514362] do_syscall_64+0x3f/0x90 [ 31.514879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.515581] [ 31.515818] The buggy address belongs to the object at ffff888019806d98 [ 31.515818] which belongs to the cache vm_area_struct of size 168 [ 31.517431] The buggy address is located 88 bytes inside of [ 31.517431] freed 168-byte region [ffff888019806d98, ffff888019806e40) [ 31.518977] [ 31.519216] The buggy address belongs to the physical page: [ 31.519935] page:000000007188e768 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19806 [ 31.521134] memcg:ffff8880194e9001 [ 31.521599] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.522316] page_type: 0xffffffff() [ 31.522810] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.523822] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194e9001 [ 31.524812] page dumped because: kasan: bad access detected [ 31.525539] [ 31.525791] Memory state around the buggy address: [ 31.526428] ffff888019806c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.527372] ffff888019806d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.528313] >ffff888019806d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.529249] ^ [ 31.530145] ffff888019806e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.531087] ffff888019806e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.532023] ================================================================== [ 31.533130] Disabling lock debugging due to kernel taint [ 33.496362] BUG: Bad rss-counter state mm:000000004aa3f370 type:MM_FILEPAGES val:33 [ 33.497408] BUG: Bad rss-counter state mm:000000004aa3f370 type:MM_ANONPAGES val:22 [ 33.904331] BUG: Bad rss-counter state mm:000000003bc262fc type:MM_FILEPAGES val:33 [ 33.905499] BUG: Bad rss-counter state mm:000000003bc262fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43585' (ECDSA) to the list of known hosts. 2023/06/21 07:46:02 fuzzer started 2023/06/21 07:46:02 dialing manager at localhost:36067 2023/06/21 07:46:02 checking machine... 2023/06/21 07:46:02 checking revisions... [ 34.670426] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:46:02 testing simple program... [ 34.717115] cgroup: Unknown subsys name 'net' [ 34.783403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880100d8000 RCX=ffffffff818644b9 RDX=ffff8880183bd1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88801810fd60 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000055 R13=ffff8880183bd1c0 R14=1ffff11003021fb2 R15=ffff888018f75bd8 RIP=ffffffff814c0860 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 00007fcac27b0700 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=000055877f020218 CR3=000000000e192000 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=2031303a36343a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36343a3730203132 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=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=00007fc5a43dbd00 CR3=0000000009a1a000 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=ba45238430269e85cd4eda8c95390d72 XMM02=000000000011c9d0ec2efd57dc4c00df XMM03=00000000001237b05b3f3761882c090e XMM04=2abaa83150d7d10a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133630 XMM06=efc148e9b2585fe60000000000132498 XMM07=e042d86d42eb936e0000000000124198 XMM08=5b3f3761882c090e000000000011ca30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000