syzkaller login: [ 30.904660] BUG: Bad rss-counter state mm:00000000c1df121b type:MM_FILEPAGES val:33 [ 30.905842] BUG: Bad rss-counter state mm:00000000c1df121b type:MM_ANONPAGES val:22 [ 30.952162] ================================================================== [ 30.953246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.954367] Read of size 8 at addr ffff88800e93cd08 by task sshd/221 [ 30.955134] [ 30.955350] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.956213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.957194] Call Trace: [ 30.957516] [ 30.957800] dump_stack_lvl+0x91/0xf0 [ 30.958301] print_report+0xcc/0x620 [ 30.958793] ? __virt_addr_valid+0x102/0x340 [ 30.959353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959979] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.960610] kasan_report+0xbe/0xf0 [ 30.961088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961719] vma_interval_tree_remove+0xc75/0xec0 [ 30.962353] vma_prepare+0xc54/0x11a0 [ 30.962844] __split_vma+0x5af/0x950 [ 30.963320] ? __pfx___split_vma+0x10/0x10 [ 30.963855] ? find_held_lock+0x2c/0x110 [ 30.964379] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.964949] ? lock_is_held_type+0x9f/0x120 [ 30.965499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.966106] ? mtree_range_walk+0x632/0x900 [ 30.966675] ? mas_walk+0x5c7/0x7c0 [ 30.967154] do_vmi_munmap+0x1f1/0x2b0 [ 30.967642] mmap_region+0x1f9/0x2660 [ 30.968119] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.968630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.969359] ? __pfx_lock_acquire+0x10/0x10 [ 30.969892] ? __pfx_mmap_region+0x10/0x10 [ 30.970436] ? security_mmap_addr+0x7d/0xa0 [ 30.970967] ? get_unmapped_area+0x1f5/0x3f0 [ 30.971526] do_mmap+0x854/0xf00 [ 30.971961] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.972449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.973017] ksys_mmap_pgoff+0x3af/0x500 [ 30.973519] do_syscall_64+0x3f/0x90 [ 30.973996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974666] RIP: 0033:0x7f85106add82 [ 30.975121] 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 [ 30.977298] RSP: 002b:00007ffecbd4ea88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.978210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85106add82 [ 30.979068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f850fae7000 [ 30.979908] RBP: 00007f850fae7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.980750] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559361bb4ec0 [ 30.981603] R13: 00007ffecbd4eaa0 R14: 00007ffecbd4ead0 R15: 00007ffecbd4ee30 [ 30.982474] [ 30.982771] [ 30.982984] Allocated by task 214: [ 30.983419] kasan_save_stack+0x22/0x50 [ 30.983926] kasan_set_track+0x25/0x30 [ 30.984423] __kasan_slab_alloc+0x59/0x70 [ 30.984946] kmem_cache_alloc+0x16b/0x370 [ 30.985462] vm_area_dup+0x20/0x160 [ 30.985915] __split_vma+0x170/0x950 [ 30.986396] split_vma+0xc6/0x110 [ 30.986833] mprotect_fixup+0x8d2/0xb30 [ 30.987332] do_mprotect_pkey+0x87e/0xd40 [ 30.987863] __x64_sys_mprotect+0x78/0xc0 [ 30.988380] do_syscall_64+0x3f/0x90 [ 30.988858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989497] [ 30.989716] Freed by task 211: [ 30.990105] kasan_save_stack+0x22/0x50 [ 30.990614] kasan_set_track+0x25/0x30 [ 30.991112] kasan_save_free_info+0x2b/0x50 [ 30.991639] __kasan_slab_free+0x10a/0x190 [ 30.992169] kmem_cache_free+0x10d/0x4d0 [ 30.992672] rcu_core+0x8c8/0x2860 [ 30.993193] __do_softirq+0x1b7/0x7d4 [ 30.993668] [ 30.993880] Last potentially related work creation: [ 30.994487] kasan_save_stack+0x22/0x50 [ 30.994988] __kasan_record_aux_stack+0x8e/0xa0 [ 30.995556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.996202] remove_vma+0x139/0x170 [ 30.996653] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.997209] do_vmi_munmap+0x1f1/0x2b0 [ 30.997691] __vm_munmap+0x138/0x3a0 [ 30.998157] __x64_sys_munmap+0x59/0x80 [ 30.998656] do_syscall_64+0x3f/0x90 [ 30.999134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.999773] [ 30.999986] The buggy address belongs to the object at ffff88800e93ccb0 [ 30.999986] which belongs to the cache vm_area_struct of size 168 [ 31.001448] The buggy address is located 88 bytes inside of [ 31.001448] freed 168-byte region [ffff88800e93ccb0, ffff88800e93cd58) [ 31.002855] [ 31.003070] The buggy address belongs to the physical page: [ 31.003732] page:00000000ff0b3a1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe93c [ 31.004816] memcg:ffff88800e49a001 [ 31.005251] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.005892] page_type: 0xffffffff() [ 31.006357] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.007277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e49a001 [ 31.008181] page dumped because: kasan: bad access detected [ 31.008846] [ 31.009060] Memory state around the buggy address: [ 31.009646] ffff88800e93cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.010505] ffff88800e93cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.011354] >ffff88800e93cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.012229] ^ [ 31.012668] ffff88800e93cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.013512] ffff88800e93ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.014401] ================================================================== [ 31.015463] Disabling lock debugging due to kernel taint [ 33.424546] BUG: Bad rss-counter state mm:000000007b1d2d56 type:MM_FILEPAGES val:33 [ 33.425704] BUG: Bad rss-counter state mm:000000007b1d2d56 type:MM_ANONPAGES val:22 [ 33.904859] BUG: Bad rss-counter state mm:00000000b29b1738 type:MM_FILEPAGES val:33 [ 33.906011] BUG: Bad rss-counter state mm:00000000b29b1738 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62747' (ECDSA) to the list of known hosts. 2023/06/20 23:12:52 fuzzer started 2023/06/20 23:12:52 dialing manager at localhost:36067 2023/06/20 23:12:52 checking machine... 2023/06/20 23:12:52 checking revisions... [ 34.624367] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:12:52 testing simple program... [ 34.681394] cgroup: Unknown subsys name 'net' [ 34.722934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880087f0c00 RCX=0000000000000000 RDX=1ffff110010fe18a RSI=ffffffff83650fa9 RDI=ffff8880087f0c50 RBP=ffff888016299b40 RSP=ffff8880163d7d50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800ed7c000 R13=ffff888019efd800 R14=0000000000000010 R15=0000000000000001 RIP=ffffffff83650fe5 RFL=00000212 [----A--] 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 00007fd9c2625900 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=00007ffd57658000 CR3=000000000fd0e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f45a2fffec0 CR3=000000000d9cc000 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=d945c44580d593bccf49c28b94b78933 XMM02=ec2efd57dc4c00df000000000011d9d0 XMM03=f69eaa2a7292cf20000000000011daa0 XMM04=d635dcb5787405ee00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132038 XMM06=510524557b58ed2e0000000000130ea0 XMM07=e042d86d42eb936e0000000000122460 XMM08=f69eaa2a7292cf20000000000011daa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000