syzkaller login: [ 30.868926] BUG: Bad rss-counter state mm:000000004cdc3a87 type:MM_FILEPAGES val:33 [ 30.869628] BUG: Bad rss-counter state mm:000000004cdc3a87 type:MM_ANONPAGES val:22 [ 30.974118] ================================================================== [ 30.974913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.975750] Read of size 8 at addr ffff88800dcc54e0 by task sshd/221 [ 30.976422] [ 30.976614] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.977348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.978346] Call Trace: [ 30.978728] [ 30.979010] dump_stack_lvl+0x91/0xf0 [ 30.979465] print_report+0xcc/0x620 [ 30.979873] ? __virt_addr_valid+0x102/0x340 [ 30.980357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981429] kasan_report+0xbe/0xf0 [ 30.981834] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982361] vma_interval_tree_remove+0xc75/0xec0 [ 30.982869] vma_prepare+0xc54/0x11a0 [ 30.983292] __split_vma+0x5af/0x950 [ 30.983688] ? __pfx___split_vma+0x10/0x10 [ 30.984132] ? find_held_lock+0x2c/0x110 [ 30.984592] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.985085] ? lock_is_held_type+0x9f/0x120 [ 30.985560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986068] ? mtree_range_walk+0x632/0x900 [ 30.986540] ? mas_walk+0x5c7/0x7c0 [ 30.986937] do_vmi_munmap+0x1f1/0x2b0 [ 30.987405] mmap_region+0x1f9/0x2660 [ 30.987813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.988265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.988710] ? __pfx_lock_acquire+0x10/0x10 [ 30.989019] ? __pfx_mmap_region+0x10/0x10 [ 30.989331] ? security_mmap_addr+0x7d/0xa0 [ 30.989639] ? get_unmapped_area+0x1f5/0x3f0 [ 30.989953] do_mmap+0x854/0xf00 [ 30.990212] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.990493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.990816] ksys_mmap_pgoff+0x3af/0x500 [ 30.991107] do_syscall_64+0x3f/0x90 [ 30.991395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991768] RIP: 0033:0x7f3844e49d82 [ 30.992031] 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 [ 30.993285] RSP: 002b:00007ffecbd47468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.993809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3844e49d82 [ 30.994301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3844283000 [ 30.994791] RBP: 00007f3844283000 R08: 0000000000000009 R09: 0000000000001000 [ 30.995296] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5f7f42ec0 [ 30.995794] R13: 00007ffecbd47480 R14: 00007ffecbd474b0 R15: 00007ffecbd47810 [ 30.996298] [ 30.996468] [ 30.996590] Allocated by task 214: [ 30.996837] kasan_save_stack+0x22/0x50 [ 30.997124] kasan_set_track+0x25/0x30 [ 30.997416] __kasan_slab_alloc+0x59/0x70 [ 30.997721] kmem_cache_alloc+0x16b/0x370 [ 30.998024] vm_area_dup+0x20/0x160 [ 30.998294] __split_vma+0x170/0x950 [ 30.998572] split_vma+0xc6/0x110 [ 30.998827] mprotect_fixup+0x8d2/0xb30 [ 30.999121] do_mprotect_pkey+0x87e/0xd40 [ 30.999434] __x64_sys_mprotect+0x78/0xc0 [ 30.999730] do_syscall_64+0x3f/0x90 [ 30.999997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.000373] [ 31.000494] Freed by task 19: [ 31.000714] kasan_save_stack+0x22/0x50 [ 31.001008] kasan_set_track+0x25/0x30 [ 31.001298] kasan_save_free_info+0x2b/0x50 [ 31.001610] __kasan_slab_free+0x10a/0x190 [ 31.001915] kmem_cache_free+0x10d/0x4d0 [ 31.002211] rcu_core+0x8c8/0x2860 [ 31.002463] __do_softirq+0x1b7/0x7d4 [ 31.002734] [ 31.002857] Last potentially related work creation: [ 31.003200] kasan_save_stack+0x22/0x50 [ 31.003506] __kasan_record_aux_stack+0x8e/0xa0 [ 31.003833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.004220] remove_vma+0x139/0x170 [ 31.004483] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.004800] do_vmi_munmap+0x1f1/0x2b0 [ 31.005078] __vm_munmap+0x138/0x3a0 [ 31.005349] __x64_sys_munmap+0x59/0x80 [ 31.005633] do_syscall_64+0x3f/0x90 [ 31.005905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.006282] [ 31.006404] The buggy address belongs to the object at ffff88800dcc5488 [ 31.006404] which belongs to the cache vm_area_struct of size 168 [ 31.007260] The buggy address is located 88 bytes inside of [ 31.007260] freed 168-byte region [ffff88800dcc5488, ffff88800dcc5530) [ 31.008079] [ 31.008212] The buggy address belongs to the physical page: [ 31.008593] page:0000000008c344bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcc5 [ 31.009226] memcg:ffff88800deb3a01 [ 31.009475] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009882] page_type: 0xffffffff() [ 31.010139] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.010682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deb3a01 [ 31.011210] page dumped because: kasan: bad access detected [ 31.011602] [ 31.011724] Memory state around the buggy address: [ 31.012057] ffff88800dcc5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.012566] ffff88800dcc5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.013060] >ffff88800dcc5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.013557] ^ [ 31.013995] ffff88800dcc5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.014496] ffff88800dcc5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.014990] ================================================================== [ 31.015539] Disabling lock debugging due to kernel taint [ 32.279400] BUG: Bad rss-counter state mm:0000000087c4494d type:MM_FILEPAGES val:33 [ 32.280399] BUG: Bad rss-counter state mm:0000000087c4494d type:MM_ANONPAGES val:22 [ 32.621063] BUG: Bad rss-counter state mm:00000000b03db1f4 type:MM_FILEPAGES val:33 [ 32.621798] BUG: Bad rss-counter state mm:00000000b03db1f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43791' (ECDSA) to the list of known hosts. 2023/06/21 10:04:22 fuzzer started 2023/06/21 10:04:23 dialing manager at localhost:36067 2023/06/21 10:04:23 checking machine... 2023/06/21 10:04:23 checking revisions... [ 33.242068] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:04:23 testing simple program... [ 33.293806] cgroup: Unknown subsys name 'net' [ 33.334050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff81143201 RDX=0000000000000800 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000c9f8d90 RSP=ffff888017d97698 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000800 R14=ffffffff83675648 R15=ffff8880101fd600 RIP=ffffffff814c0250 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 00007f25aea27900 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=00007ffee02ee000 CR3=000000000e46e000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fb3e8786cc0 CR3=000000000ca70000 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=2c8468ae83f275a346445ba20e99de4e XMM02=ec2efd57dc4c00df000000000011ab28 XMM03=09df713f52f6e964000000000011abf8 XMM04=ed262ffff2bb836b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f58 XMM06=5fab69b7b5b589b90000000000130dc0 XMM07=e042d86d42eb936e0000000000122088 XMM08=09df713f52f6e964000000000011abf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000