syzkaller login: [ 38.944470] BUG: Bad rss-counter state mm:00000000d425d2d8 type:MM_FILEPAGES val:33 [ 38.945225] BUG: Bad rss-counter state mm:00000000d425d2d8 type:MM_ANONPAGES val:22 [ 38.977171] ================================================================== [ 38.977822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.978625] Read of size 8 at addr ffff888019c11798 by task sshd/224 [ 38.979182] [ 38.979390] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.980134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.980998] Call Trace: [ 38.981221] [ 38.981416] dump_stack_lvl+0x91/0xf0 [ 38.981786] print_report+0xcc/0x620 [ 38.982156] ? __virt_addr_valid+0x102/0x340 [ 38.982636] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.983163] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.983659] kasan_report+0xbe/0xf0 [ 38.983968] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.984374] vma_interval_tree_remove+0xc75/0xec0 [ 38.984791] vma_prepare+0xc54/0x11a0 [ 38.985124] __split_vma+0x5af/0x950 [ 38.985445] ? __pfx___split_vma+0x10/0x10 [ 38.985817] ? find_held_lock+0x2c/0x110 [ 38.986185] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.986572] ? lock_is_held_type+0x9f/0x120 [ 38.986943] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.987367] ? mtree_range_walk+0x632/0x900 [ 38.987727] ? mas_walk+0x5c7/0x7c0 [ 38.988032] do_vmi_munmap+0x1f1/0x2b0 [ 38.988347] mmap_region+0x1f9/0x2660 [ 38.988657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.988979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.989439] ? __pfx_lock_acquire+0x10/0x10 [ 38.989804] ? __pfx_mmap_region+0x10/0x10 [ 38.990168] ? security_mmap_addr+0x7d/0xa0 [ 38.990522] ? get_unmapped_area+0x1f5/0x3f0 [ 38.990871] do_mmap+0x854/0xf00 [ 38.991208] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.991525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.991889] ksys_mmap_pgoff+0x3af/0x500 [ 38.992224] do_syscall_64+0x3f/0x90 [ 38.992555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.992999] RIP: 0033:0x7ff026410d82 [ 38.993332] 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 [ 38.994779] RSP: 002b:00007ffec06a9aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.995436] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff026410d82 [ 38.996017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff02584a000 [ 38.996573] RBP: 00007ff02584a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.997152] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c06b993ec0 [ 38.997730] R13: 00007ffec06a9ac0 R14: 00007ffec06a9af0 R15: 00007ffec06a9e50 [ 38.998308] [ 38.998494] [ 38.998632] Allocated by task 217: [ 38.998900] kasan_save_stack+0x22/0x50 [ 38.999292] kasan_set_track+0x25/0x30 [ 38.999638] __kasan_slab_alloc+0x59/0x70 [ 39.000040] kmem_cache_alloc+0x16b/0x370 [ 39.000380] vm_area_dup+0x20/0x160 [ 39.000666] __split_vma+0x170/0x950 [ 39.000959] split_vma+0xc6/0x110 [ 39.001233] mprotect_fixup+0x8d2/0xb30 [ 39.001550] do_mprotect_pkey+0x87e/0xd40 [ 39.001887] __x64_sys_mprotect+0x78/0xc0 [ 39.002213] do_syscall_64+0x3f/0x90 [ 39.002533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002960] [ 39.003149] Freed by task 217: [ 39.003402] kasan_save_stack+0x22/0x50 [ 39.003739] kasan_set_track+0x25/0x30 [ 39.004071] kasan_save_free_info+0x2b/0x50 [ 39.004420] __kasan_slab_free+0x10a/0x190 [ 39.004748] kmem_cache_free+0x10d/0x4d0 [ 39.005061] rcu_core+0x8c8/0x2860 [ 39.005355] __do_softirq+0x1b7/0x7d4 [ 39.005669] [ 39.005820] Last potentially related work creation: [ 39.006208] kasan_save_stack+0x22/0x50 [ 39.006546] __kasan_record_aux_stack+0x8e/0xa0 [ 39.006898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007334] remove_vma+0x139/0x170 [ 39.007631] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.007998] do_vmi_munmap+0x1f1/0x2b0 [ 39.008314] __vm_munmap+0x138/0x3a0 [ 39.008626] __x64_sys_munmap+0x59/0x80 [ 39.008945] do_syscall_64+0x3f/0x90 [ 39.009255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009653] [ 39.009788] The buggy address belongs to the object at ffff888019c11740 [ 39.009788] which belongs to the cache vm_area_struct of size 168 [ 39.010725] The buggy address is located 88 bytes inside of [ 39.010725] freed 168-byte region [ffff888019c11740, ffff888019c117e8) [ 39.011642] [ 39.011778] The buggy address belongs to the physical page: [ 39.012210] page:000000008cbfc471 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c11 [ 39.012932] memcg:ffff888016c80101 [ 39.013214] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.013633] page_type: 0xffffffff() [ 39.013920] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.014500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c80101 [ 39.015121] page dumped because: kasan: bad access detected [ 39.015561] [ 39.015713] Memory state around the buggy address: [ 39.016093] ffff888019c11680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.016640] ffff888019c11700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.017192] >ffff888019c11780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.017743] ^ [ 39.018067] ffff888019c11800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.018622] ffff888019c11880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.019194] ================================================================== [ 39.019820] Disabling lock debugging due to kernel taint [ 40.859205] BUG: Bad rss-counter state mm:0000000027c2ceb2 type:MM_FILEPAGES val:33 [ 40.859937] BUG: Bad rss-counter state mm:0000000027c2ceb2 type:MM_ANONPAGES val:22 [ 41.217194] BUG: Bad rss-counter state mm:00000000343cafee type:MM_FILEPAGES val:33 [ 41.217966] BUG: Bad rss-counter state mm:00000000343cafee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23508' (ECDSA) to the list of known hosts. 2023/06/21 09:37:37 fuzzer started 2023/06/21 09:37:38 dialing manager at localhost:36067 2023/06/21 09:37:38 checking machine... 2023/06/21 09:37:38 checking revisions... [ 41.746510] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:37:38 testing simple program... [ 41.782198] cgroup: Unknown subsys name 'net' [ 41.818622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=0000564c7b0ccc78 CR3=0000000016990000 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=2037333a37333a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3333 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3333325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015944000 RCX=0000000000000000 RDX=1ffff110011ecad3 RSI=ffffffff83871afe RDI=0000000000000005 RBP=ffff888008f65000 RSP=ffff888015b67b18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888008f65698 R13=ffff888010201780 R14=0000000000000001 R15=ffff888008f65504 RIP=ffffffff83871b28 RFL=00000282 [--S----] 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 00007f0d55dfb900 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=00007f0d563b2618 CR3=000000000d958000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000