syzkaller login: [ 30.906841] BUG: Bad rss-counter state mm:00000000677ac434 type:MM_FILEPAGES val:33 [ 30.907851] BUG: Bad rss-counter state mm:00000000677ac434 type:MM_ANONPAGES val:22 [ 31.020622] ================================================================== [ 31.021267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.021881] Read of size 8 at addr ffff888016098798 by task sshd/220 [ 31.022400] [ 31.022549] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.023158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.023823] Call Trace: [ 31.024031] [ 31.024216] dump_stack_lvl+0x91/0xf0 [ 31.024564] print_report+0xcc/0x620 [ 31.024891] ? __virt_addr_valid+0x102/0x340 [ 31.025474] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.025891] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.026295] kasan_report+0xbe/0xf0 [ 31.026621] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027095] vma_interval_tree_remove+0xc75/0xec0 [ 31.027513] vma_prepare+0xc54/0x11a0 [ 31.027825] __split_vma+0x5af/0x950 [ 31.028139] ? __pfx___split_vma+0x10/0x10 [ 31.028491] ? find_held_lock+0x2c/0x110 [ 31.028834] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.029209] ? lock_is_held_type+0x9f/0x120 [ 31.029559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.029958] ? mtree_range_walk+0x632/0x900 [ 31.030319] ? mas_walk+0x5c7/0x7c0 [ 31.030634] do_vmi_munmap+0x1f1/0x2b0 [ 31.030983] mmap_region+0x1f9/0x2660 [ 31.031298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.031630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.032101] ? __pfx_lock_acquire+0x10/0x10 [ 31.032461] ? __pfx_mmap_region+0x10/0x10 [ 31.032821] ? security_mmap_addr+0x7d/0xa0 [ 31.033186] ? get_unmapped_area+0x1f5/0x3f0 [ 31.033556] do_mmap+0x854/0xf00 [ 31.033852] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.034180] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.034569] ksys_mmap_pgoff+0x3af/0x500 [ 31.034968] do_syscall_64+0x3f/0x90 [ 31.035329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035801] RIP: 0033:0x7f8284740d82 [ 31.036140] 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 [ 31.037707] RSP: 002b:00007fffd7a36fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.038348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8284740d82 [ 31.038971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8283b7a000 [ 31.039594] RBP: 00007f8283b7a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.040213] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbcf1d1ec0 [ 31.040849] R13: 00007fffd7a37000 R14: 00007fffd7a37030 R15: 00007fffd7a37390 [ 31.041488] [ 31.041698] [ 31.041851] Allocated by task 213: [ 31.042152] kasan_save_stack+0x22/0x50 [ 31.042515] kasan_set_track+0x25/0x30 [ 31.042853] __kasan_slab_alloc+0x59/0x70 [ 31.043246] kmem_cache_alloc+0x16b/0x370 [ 31.043620] vm_area_dup+0x20/0x160 [ 31.043944] __split_vma+0x170/0x950 [ 31.044272] split_vma+0xc6/0x110 [ 31.044582] mprotect_fixup+0x8d2/0xb30 [ 31.044937] do_mprotect_pkey+0x87e/0xd40 [ 31.045296] __x64_sys_mprotect+0x78/0xc0 [ 31.045676] do_syscall_64+0x3f/0x90 [ 31.046022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046478] [ 31.046630] Freed by task 213: [ 31.046948] kasan_save_stack+0x22/0x50 [ 31.047307] kasan_set_track+0x25/0x30 [ 31.047658] kasan_save_free_info+0x2b/0x50 [ 31.048030] __kasan_slab_free+0x10a/0x190 [ 31.048415] kmem_cache_free+0x10d/0x4d0 [ 31.048785] rcu_core+0x8c8/0x2860 [ 31.049105] __do_softirq+0x1b7/0x7d4 [ 31.049458] [ 31.049606] Last potentially related work creation: [ 31.050024] kasan_save_stack+0x22/0x50 [ 31.050376] __kasan_record_aux_stack+0x8e/0xa0 [ 31.050771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.051274] remove_vma+0x139/0x170 [ 31.051605] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.051997] do_vmi_munmap+0x1f1/0x2b0 [ 31.052344] __vm_munmap+0x138/0x3a0 [ 31.052682] __x64_sys_munmap+0x59/0x80 [ 31.053048] do_syscall_64+0x3f/0x90 [ 31.053393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053843] [ 31.053991] The buggy address belongs to the object at ffff888016098740 [ 31.053991] which belongs to the cache vm_area_struct of size 168 [ 31.055132] The buggy address is located 88 bytes inside of [ 31.055132] freed 168-byte region [ffff888016098740, ffff8880160987e8) [ 31.056217] [ 31.056387] The buggy address belongs to the physical page: [ 31.056911] page:000000002388fdd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16098 [ 31.057733] memcg:ffff888015b23a01 [ 31.058039] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.058514] page_type: 0xffffffff() [ 31.058840] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.059539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b23a01 [ 31.060220] page dumped because: kasan: bad access detected [ 31.060739] [ 31.060896] Memory state around the buggy address: [ 31.061314] ffff888016098680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.061915] ffff888016098700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.062541] >ffff888016098780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.063243] ^ [ 31.063599] ffff888016098800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.064204] ffff888016098880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.064825] ================================================================== [ 31.065582] Disabling lock debugging due to kernel taint [ 33.077822] BUG: Bad rss-counter state mm:00000000db223854 type:MM_FILEPAGES val:33 [ 33.078446] BUG: Bad rss-counter state mm:00000000db223854 type:MM_ANONPAGES val:22 [ 33.465807] BUG: Bad rss-counter state mm:000000003994da55 type:MM_FILEPAGES val:33 [ 33.466486] BUG: Bad rss-counter state mm:000000003994da55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53128' (ECDSA) to the list of known hosts. 2023/06/21 09:33:01 fuzzer started 2023/06/21 09:33:02 dialing manager at localhost:36067 2023/06/21 09:33:02 checking machine... 2023/06/21 09:33:02 checking revisions... [ 34.003499] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:33:02 testing simple program... [ 34.042824] cgroup: Unknown subsys name 'net' [ 34.083948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:01 Registers: info registers vcpu 0 RAX=ffffffff860ae4d3 RBX=0000000000000001 RCX=ffffffff860ae4d2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d9f9b0 RSP=ffff888008d9f8e8 R8 =ffffffff860ae4d6 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9ff20 R15=ffff888008d9f958 RIP=ffffffff81130b8f 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 =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=00007fe0cbac2f00 CR3=000000000c698000 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=43ddbbe8ba3d5697594b6e3d51400d7b XMM02=000000000011ac28ec2efd57dc4c00df XMM03=0000000000121930ca92cdde07f58d4b XMM04=20f4576c67b0ad3b00000000000ae988 XMM05=19e9129bd510f2350000000000131790 XMM06=2c123dfaffc7164400000000001305f8 XMM07=e042d86d42eb936e0000000000121bb0 XMM08=ca92cdde07f58d4b000000000011ac88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017e20001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888017e20001 RSI=ffff888017e1ff58 RDI=ffff888017e1fa50 RBP=ffff888017e1fa98 RSP=ffff888017e1f9d0 R8 =ffffffff864bbb58 R9 =ffff888017e1fa80 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888017e1faa0 R13=ffff888017e1fa88 R14=ffff888017e1ff58 R15=ffff888017e1fa40 RIP=ffffffff8113137f RFL=00000296 [--S-AP-] 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 00007fc481e77900 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=00007fc48242f0b0 CR3=000000000f042000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000