syzkaller login: [ 31.040080] BUG: Bad rss-counter state mm:000000009e713dc2 type:MM_FILEPAGES val:33 [ 31.042070] BUG: Bad rss-counter state mm:000000009e713dc2 type:MM_ANONPAGES val:22 [ 31.199395] ================================================================== [ 31.200357] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.201305] Read of size 8 at addr ffff8880169ff880 by task sshd/220 [ 31.202214] [ 31.202434] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.203315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.204310] Call Trace: [ 31.204640] [ 31.204926] dump_stack_lvl+0x91/0xf0 [ 31.205422] print_report+0xcc/0x620 [ 31.205920] ? __virt_addr_valid+0x102/0x340 [ 31.206481] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207746] kasan_report+0xbe/0xf0 [ 31.208225] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208847] vma_interval_tree_remove+0xc75/0xec0 [ 31.209443] vma_prepare+0xc54/0x11a0 [ 31.209930] __split_vma+0x5af/0x950 [ 31.210414] ? __pfx___split_vma+0x10/0x10 [ 31.210942] ? find_held_lock+0x2c/0x110 [ 31.211476] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.212046] ? lock_is_held_type+0x9f/0x120 [ 31.212585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.213211] ? mtree_range_walk+0x632/0x900 [ 31.213786] ? mas_walk+0x5c7/0x7c0 [ 31.214267] do_vmi_munmap+0x1f1/0x2b0 [ 31.214781] mmap_region+0x1f9/0x2660 [ 31.215297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.215819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216530] ? __pfx_lock_acquire+0x10/0x10 [ 31.217062] ? __pfx_mmap_region+0x10/0x10 [ 31.217603] ? security_mmap_addr+0x7d/0xa0 [ 31.218137] ? get_unmapped_area+0x1f5/0x3f0 [ 31.218679] do_mmap+0x854/0xf00 [ 31.219121] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.219634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.220184] ksys_mmap_pgoff+0x3af/0x500 [ 31.220688] do_syscall_64+0x3f/0x90 [ 31.221164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221806] RIP: 0033:0x7f01b42b4d82 [ 31.222262] 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 [ 31.224384] RSP: 002b:00007ffde02790b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.225281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01b42b4d82 [ 31.226121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01b36ee000 [ 31.226964] RBP: 00007f01b36ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.227838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aee7f90ec0 [ 31.228674] R13: 00007ffde02790d0 R14: 00007ffde0279100 R15: 00007ffde0279460 [ 31.229533] [ 31.229822] [ 31.230045] Allocated by task 213: [ 31.230473] kasan_save_stack+0x22/0x50 [ 31.230979] kasan_set_track+0x25/0x30 [ 31.231487] __kasan_slab_alloc+0x59/0x70 [ 31.232016] kmem_cache_alloc+0x16b/0x370 [ 31.232547] vm_area_dup+0x20/0x160 [ 31.233009] __split_vma+0x170/0x950 [ 31.233473] split_vma+0xc6/0x110 [ 31.233921] mprotect_fixup+0x8d2/0xb30 [ 31.234416] do_mprotect_pkey+0x87e/0xd40 [ 31.234945] __x64_sys_mprotect+0x78/0xc0 [ 31.235464] do_syscall_64+0x3f/0x90 [ 31.235941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236581] [ 31.236794] Freed by task 213: [ 31.237193] kasan_save_stack+0x22/0x50 [ 31.237860] kasan_set_track+0x25/0x30 [ 31.238476] kasan_save_free_info+0x2b/0x50 [ 31.239063] __kasan_slab_free+0x10a/0x190 [ 31.239813] kmem_cache_free+0x10d/0x4d0 [ 31.240423] rcu_core+0x8c8/0x2860 [ 31.240890] __do_softirq+0x1b7/0x7d4 [ 31.241373] [ 31.241589] Last potentially related work creation: [ 31.242214] kasan_save_stack+0x22/0x50 [ 31.242726] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.244046] remove_vma+0x139/0x170 [ 31.244504] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245068] do_vmi_munmap+0x1f1/0x2b0 [ 31.245551] __vm_munmap+0x138/0x3a0 [ 31.246020] __x64_sys_munmap+0x59/0x80 [ 31.246514] do_syscall_64+0x3f/0x90 [ 31.246987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247634] [ 31.247847] The buggy address belongs to the object at ffff8880169ff828 [ 31.247847] which belongs to the cache vm_area_struct of size 168 [ 31.249314] The buggy address is located 88 bytes inside of [ 31.249314] freed 168-byte region [ffff8880169ff828, ffff8880169ff8d0) [ 31.250722] [ 31.250936] The buggy address belongs to the physical page: [ 31.251612] page:0000000053f698d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169ff [ 31.252705] memcg:ffff888015d73401 [ 31.253136] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253778] page_type: 0xffffffff() [ 31.254232] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.255148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d73401 [ 31.256056] page dumped because: kasan: bad access detected [ 31.256725] [ 31.256939] Memory state around the buggy address: [ 31.257523] ffff8880169ff780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.258373] ffff8880169ff800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.259231] >ffff8880169ff880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.260114] ^ [ 31.260541] ffff8880169ff900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261427] ffff8880169ff980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.262289] ================================================================== [ 31.263428] Disabling lock debugging due to kernel taint [ 33.222015] BUG: Bad rss-counter state mm:00000000f1ba889e type:MM_FILEPAGES val:33 [ 33.223280] BUG: Bad rss-counter state mm:00000000f1ba889e type:MM_ANONPAGES val:22 [ 33.797452] BUG: Bad rss-counter state mm:0000000080dac1aa type:MM_FILEPAGES val:33 [ 33.798779] BUG: Bad rss-counter state mm:0000000080dac1aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40519' (ECDSA) to the list of known hosts. 2023/06/20 23:36:39 fuzzer started 2023/06/20 23:36:40 dialing manager at localhost:36067 2023/06/20 23:36:40 checking machine... 2023/06/20 23:36:40 checking revisions... [ 34.439185] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:36:40 testing simple program... [ 34.497493] cgroup: Unknown subsys name 'net' [ 34.537731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002cf0f26 RSI=ffffffff81895230 RDI=ffff8880167879a0 RBP=ffff888016787970 RSP=ffff8880167878d0 R8 =0000000000000001 R9 =ffff888016787918 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880167879a0 R13=0000000000000000 R14=ffff88801a2d1b40 R15=0000000000092cc0 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007f704249c900 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=00007f7042a540b0 CR3=000000001a17c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880147a7520 RCX=0000000000000001 RDX=1ffff110028f4ea5 RSI=ffff8880147a7888 RDI=ffff8880147a7528 RBP=ffff8880147a7888 RSP=ffff8880147a7478 R8 =ffffffff86139622 R9 =ffff8880147a7560 R10=0000000000038001 R11=0000000000020ed2 R12=0000000000000008 R13=ffff8880147a7568 R14=ffff8880147a7890 R15=ffff8880147a7520 RIP=ffffffff81130445 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 00007eff0a21c900 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=00007eff0973a000 CR3=000000000d6c2000 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=6ce3decc7a9034841443a1103c6f8063 XMM02=ec2efd57dc4c00df000000000011d528 XMM03=5a2ef49ff710a79f000000000011d5f8 XMM04=74dfd8189896edf400000000000ae988 XMM05=df7b2a82b18141b80000000000132cf8 XMM06=d025aef48e27fefe0000000000131a98 XMM07=fb795ef6d65770560000000000121d00 XMM08=2c67c8bc2e329bc3000000000011d598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000