syzkaller login: [ 29.245606] BUG: Bad rss-counter state mm:000000009e8cdea5 type:MM_FILEPAGES val:33 [ 29.247116] BUG: Bad rss-counter state mm:000000009e8cdea5 type:MM_ANONPAGES val:22 [ 29.461813] ================================================================== [ 29.462727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.463668] Read of size 8 at addr ffff888019eabed8 by task sshd/221 [ 29.464533] [ 29.464776] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.465651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.466632] Call Trace: [ 29.466962] [ 29.467249] dump_stack_lvl+0x91/0xf0 [ 29.467737] print_report+0xcc/0x620 [ 29.468221] ? __virt_addr_valid+0x102/0x340 [ 29.468779] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.469396] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.470027] kasan_report+0xbe/0xf0 [ 29.470503] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.471126] vma_interval_tree_remove+0xc75/0xec0 [ 29.471735] vma_prepare+0xc54/0x11a0 [ 29.472217] __split_vma+0x5af/0x950 [ 29.472684] ? __pfx___split_vma+0x10/0x10 [ 29.473207] ? find_held_lock+0x2c/0x110 [ 29.473742] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.474367] ? lock_is_held_type+0x9f/0x120 [ 29.474969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.475654] ? mtree_range_walk+0x632/0x900 [ 29.476268] ? mas_walk+0x5c7/0x7c0 [ 29.476810] do_vmi_munmap+0x1f1/0x2b0 [ 29.477373] mmap_region+0x1f9/0x2660 [ 29.477920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.478503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.479306] ? __pfx_lock_acquire+0x10/0x10 [ 29.479909] ? __pfx_mmap_region+0x10/0x10 [ 29.480515] ? security_mmap_addr+0x7d/0xa0 [ 29.481116] ? get_unmapped_area+0x1f5/0x3f0 [ 29.481740] do_mmap+0x854/0xf00 [ 29.482199] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.482691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.483254] ksys_mmap_pgoff+0x3af/0x500 [ 29.483759] do_syscall_64+0x3f/0x90 [ 29.484236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.484885] RIP: 0033:0x7f97c5c8ed82 [ 29.485346] 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 [ 29.487480] RSP: 002b:00007ffd47840fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.488388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97c5c8ed82 [ 29.489237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97c50c8000 [ 29.490090] RBP: 00007f97c50c8000 R08: 0000000000000009 R09: 0000000000001000 [ 29.490944] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bafa233ec0 [ 29.491777] R13: 00007ffd47841000 R14: 00007ffd47841030 R15: 00007ffd47841390 [ 29.492642] [ 29.492933] [ 29.493146] Allocated by task 213: [ 29.493584] kasan_save_stack+0x22/0x50 [ 29.494089] kasan_set_track+0x25/0x30 [ 29.494576] __kasan_slab_alloc+0x59/0x70 [ 29.495100] kmem_cache_alloc+0x16b/0x370 [ 29.495615] vm_area_dup+0x20/0x160 [ 29.496073] __split_vma+0x170/0x950 [ 29.496544] split_vma+0xc6/0x110 [ 29.496986] mprotect_fixup+0x8d2/0xb30 [ 29.497490] do_mprotect_pkey+0x87e/0xd40 [ 29.498036] __x64_sys_mprotect+0x78/0xc0 [ 29.498561] do_syscall_64+0x3f/0x90 [ 29.499041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.499677] [ 29.499894] Freed by task 13: [ 29.500275] kasan_save_stack+0x22/0x50 [ 29.500776] kasan_set_track+0x25/0x30 [ 29.501272] kasan_save_free_info+0x2b/0x50 [ 29.501817] __kasan_slab_free+0x10a/0x190 [ 29.502346] kmem_cache_free+0x10d/0x4d0 [ 29.502859] rcu_core+0x8c8/0x2860 [ 29.503304] __do_softirq+0x1b7/0x7d4 [ 29.503776] [ 29.503989] Last potentially related work creation: [ 29.504567] kasan_save_stack+0x22/0x50 [ 29.505073] __kasan_record_aux_stack+0x8e/0xa0 [ 29.505646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.506350] remove_vma+0x139/0x170 [ 29.506800] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.507363] do_vmi_munmap+0x1f1/0x2b0 [ 29.507848] __vm_munmap+0x138/0x3a0 [ 29.508322] __x64_sys_munmap+0x59/0x80 [ 29.508825] do_syscall_64+0x3f/0x90 [ 29.509299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.509958] [ 29.510172] The buggy address belongs to the object at ffff888019eabe80 [ 29.510172] which belongs to the cache vm_area_struct of size 168 [ 29.511637] The buggy address is located 88 bytes inside of [ 29.511637] freed 168-byte region [ffff888019eabe80, ffff888019eabf28) [ 29.513037] [ 29.513251] The buggy address belongs to the physical page: [ 29.513913] page:00000000829f0df2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eab [ 29.515171] memcg:ffff888019bba901 [ 29.515602] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.516244] page_type: 0xffffffff() [ 29.516699] raw: 0100000000000200 ffff88800879fc80 ffffea000034dd40 dead000000000006 [ 29.517633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bba901 [ 29.518544] page dumped because: kasan: bad access detected [ 29.519202] [ 29.519416] Memory state around the buggy address: [ 29.520003] ffff888019eabd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.520852] ffff888019eabe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.521713] >ffff888019eabe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.522564] ^ [ 29.523296] ffff888019eabf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.524152] ffff888019eabf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.525018] ================================================================== [ 29.526174] Disabling lock debugging due to kernel taint [ 32.156448] BUG: Bad rss-counter state mm:000000003d985041 type:MM_FILEPAGES val:33 [ 32.157612] BUG: Bad rss-counter state mm:000000003d985041 type:MM_ANONPAGES val:22 [ 32.567954] BUG: Bad rss-counter state mm:0000000099b8ae32 type:MM_FILEPAGES val:33 [ 32.569055] BUG: Bad rss-counter state mm:0000000099b8ae32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6851' (ECDSA) to the list of known hosts. 2023/06/19 17:33:51 fuzzer started 2023/06/19 17:33:51 dialing manager at localhost:44161 2023/06/19 17:33:51 checking machine... 2023/06/19 17:33:51 checking revisions... [ 33.281464] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:33:52 testing simple program... [ 33.334206] cgroup: Unknown subsys name 'net' [ 33.371085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a70 RCX=ffff88800e2d0000 RDX=0000000000000001 RSI=0000000000000001 RDI=ffff88806ce09a80 RBP=ffff88800e2cfc70 RSP=ffff88806ce099c8 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88800e2c8000 R14=ffff88800e2d0000 R15=ffff88806ce09a70 RIP=ffffffff81130543 RFL=00000202 [-------] 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 00007fbccece3900 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=00007ffe2a360000 CR3=000000000fd2e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f543632caf0 CR3=000000000d564000 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=a0e7b73bb77959988a4b938b69c7acfb XMM02=2c67c8bc2e329bc3000000000011fdc8 XMM03=fb795ef6d65770560000000000123d40 XMM04=2126014125027c2800000000000ae988 XMM05=e4cb8bb95a7664b600000000001340d0 XMM06=c291bd5c70af25b90000000000133f58 XMM07=e042d86d42eb936e0000000000124018 XMM08=fc9417d784c2951d000000000011fe28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000