syzkaller login: [ 34.561552] BUG: Bad rss-counter state mm:0000000055e9b3d3 type:MM_FILEPAGES val:33 [ 34.562771] BUG: Bad rss-counter state mm:0000000055e9b3d3 type:MM_ANONPAGES val:22 [ 34.727770] ================================================================== [ 34.729397] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.730804] Read of size 8 at addr ffff88800b8cf968 by task sshd/220 [ 34.731933] [ 34.732255] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 34.733526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.734879] Call Trace: [ 34.735293] [ 34.735651] dump_stack_lvl+0x91/0xf0 [ 34.736269] print_report+0xcc/0x620 [ 34.736880] ? __virt_addr_valid+0x102/0x340 [ 34.737582] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.738457] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.739255] kasan_report+0xbe/0xf0 [ 34.739864] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.740657] vma_interval_tree_remove+0xc75/0xec0 [ 34.741431] vma_prepare+0xc54/0x11a0 [ 34.742083] __split_vma+0x5af/0x950 [ 34.742737] ? __pfx___split_vma+0x10/0x10 [ 34.743341] ? find_held_lock+0x2c/0x110 [ 34.743972] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.744688] ? lock_is_held_type+0x9f/0x120 [ 34.745365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.746174] ? mtree_range_walk+0x632/0x900 [ 34.746893] ? mas_walk+0x5c7/0x7c0 [ 34.747517] do_vmi_munmap+0x1f1/0x2b0 [ 34.748147] mmap_region+0x1f9/0x2660 [ 34.748764] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.749433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.750420] ? __pfx_lock_acquire+0x10/0x10 [ 34.751231] ? __pfx_mmap_region+0x10/0x10 [ 34.752016] ? security_mmap_addr+0x7d/0xa0 [ 34.752799] ? get_unmapped_area+0x1f5/0x3f0 [ 34.753644] do_mmap+0x854/0xf00 [ 34.754334] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.755030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.755828] ksys_mmap_pgoff+0x3af/0x500 [ 34.756571] do_syscall_64+0x3f/0x90 [ 34.757261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.758216] RIP: 0033:0x7f72456f7d82 [ 34.758836] 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 [ 34.761656] RSP: 002b:00007ffd12a6d148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.762879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72456f7d82 [ 34.764069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7244b31000 [ 34.765249] RBP: 00007f7244b31000 R08: 0000000000000009 R09: 0000000000001000 [ 34.766413] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3161d0f70 [ 34.767480] R13: 00007ffd12a6d160 R14: 00007ffd12a6d190 R15: 00007ffd12a6d4f0 [ 34.768697] [ 34.769090] [ 34.769381] Allocated by task 213: [ 34.769962] kasan_save_stack+0x22/0x50 [ 34.770579] kasan_set_track+0x25/0x30 [ 34.771202] __kasan_slab_alloc+0x59/0x70 [ 34.771914] kmem_cache_alloc+0x16b/0x370 [ 34.772610] vm_area_dup+0x20/0x160 [ 34.773226] __split_vma+0x170/0x950 [ 34.773852] split_vma+0xc6/0x110 [ 34.774470] mprotect_fixup+0x8d2/0xb30 [ 34.775147] do_mprotect_pkey+0x87e/0xd40 [ 34.775899] __x64_sys_mprotect+0x78/0xc0 [ 34.776670] do_syscall_64+0x3f/0x90 [ 34.777371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.778335] [ 34.778655] Freed by task 213: [ 34.779244] kasan_save_stack+0x22/0x50 [ 34.779995] kasan_set_track+0x25/0x30 [ 34.780721] kasan_save_free_info+0x2b/0x50 [ 34.781513] __kasan_slab_free+0x10a/0x190 [ 34.782316] kmem_cache_free+0x10d/0x4d0 [ 34.783063] rcu_core+0x8c8/0x2860 [ 34.783728] __do_softirq+0x1b7/0x7d4 [ 34.784436] [ 34.784775] Last potentially related work creation: [ 34.785494] kasan_save_stack+0x22/0x50 [ 34.786175] __kasan_record_aux_stack+0x8e/0xa0 [ 34.786857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.787537] remove_vma+0x139/0x170 [ 34.788123] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.788784] do_vmi_munmap+0x1f1/0x2b0 [ 34.789415] __vm_munmap+0x138/0x3a0 [ 34.790033] __x64_sys_munmap+0x59/0x80 [ 34.790677] do_syscall_64+0x3f/0x90 [ 34.791314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.792141] [ 34.792462] The buggy address belongs to the object at ffff88800b8cf910 [ 34.792462] which belongs to the cache vm_area_struct of size 168 [ 34.794730] The buggy address is located 88 bytes inside of [ 34.794730] freed 168-byte region [ffff88800b8cf910, ffff88800b8cf9b8) [ 34.796853] [ 34.797179] The buggy address belongs to the physical page: [ 34.798187] page:00000000aa2f41a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8cf [ 34.799838] memcg:ffff88800ba65e01 [ 34.800497] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.801493] page_type: 0xffffffff() [ 34.802187] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 34.803567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ba65e01 [ 34.804950] page dumped because: kasan: bad access detected [ 34.806004] [ 34.806336] Memory state around the buggy address: [ 34.807202] ffff88800b8cf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.808509] ffff88800b8cf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.809737] >ffff88800b8cf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.810955] ^ [ 34.812157] ffff88800b8cf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.813423] ffff88800b8cfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.814769] ================================================================== [ 34.816430] Disabling lock debugging due to kernel taint [ 36.745053] BUG: Bad rss-counter state mm:0000000048b266c9 type:MM_FILEPAGES val:33 [ 36.746054] BUG: Bad rss-counter state mm:0000000048b266c9 type:MM_ANONPAGES val:22 [ 37.149804] BUG: Bad rss-counter state mm:00000000a43e6530 type:MM_FILEPAGES val:33 [ 37.151330] BUG: Bad rss-counter state mm:00000000a43e6530 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4335' (ECDSA) to the list of known hosts. 2023/06/21 00:06:12 fuzzer started 2023/06/21 00:06:13 dialing manager at localhost:36067 2023/06/21 00:06:13 checking machine... 2023/06/21 00:06:13 checking revisions... [ 38.118098] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:06:13 testing simple program... [ 38.177707] cgroup: Unknown subsys name 'net' [ 38.249178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:06:12 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=0000000000000001 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=00007ffed724d388 CR3=0000000005482000 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=00007f02f8d6e5100000563861a38790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9e1359 RDX=dffffc0000000000 RSI=ffffffff8450cc7f RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff86129ab2 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000001e4ed R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130706 RFL=00000246 [---Z-P-] 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 00007fc1f00a8900 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=00007fc1f0087020 CR3=000000000d8c6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000