syzkaller login: [ 38.641776] BUG: Bad rss-counter state mm:00000000e6ae55a6 type:MM_FILEPAGES val:33 [ 38.642788] BUG: Bad rss-counter state mm:00000000e6ae55a6 type:MM_ANONPAGES val:22 [ 38.819026] ================================================================== [ 38.820009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.820954] Read of size 8 at addr ffff88800e74f880 by task sshd/218 [ 38.821718] [ 38.822040] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.822915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.824152] Call Trace: [ 38.824560] [ 38.824909] dump_stack_lvl+0x91/0xf0 [ 38.825519] print_report+0xcc/0x620 [ 38.826107] ? __virt_addr_valid+0x102/0x340 [ 38.826779] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.827562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.828308] kasan_report+0xbe/0xf0 [ 38.828883] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.829647] vma_interval_tree_remove+0xc75/0xec0 [ 38.830378] vma_prepare+0xc54/0x11a0 [ 38.830972] __split_vma+0x5af/0x950 [ 38.831555] ? __pfx___split_vma+0x10/0x10 [ 38.832195] ? find_held_lock+0x2c/0x110 [ 38.832838] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.833536] ? lock_is_held_type+0x9f/0x120 [ 38.834206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.834965] ? mtree_range_walk+0x632/0x900 [ 38.835661] ? mas_walk+0x5c7/0x7c0 [ 38.836252] do_vmi_munmap+0x1f1/0x2b0 [ 38.836830] mmap_region+0x1f9/0x2660 [ 38.837399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.837999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.838828] ? __pfx_lock_acquire+0x10/0x10 [ 38.839491] ? __pfx_mmap_region+0x10/0x10 [ 38.840128] ? security_mmap_addr+0x7d/0xa0 [ 38.840697] ? get_unmapped_area+0x1f5/0x3f0 [ 38.841241] do_mmap+0x854/0xf00 [ 38.841681] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.842176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.842728] ksys_mmap_pgoff+0x3af/0x500 [ 38.843235] do_syscall_64+0x3f/0x90 [ 38.843726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844374] RIP: 0033:0x7fda55306d82 [ 38.844825] 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 [ 38.846947] RSP: 002b:00007ffe54ca2ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.847854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda55306d82 [ 38.848704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda54740000 [ 38.849544] RBP: 00007fda54740000 R08: 0000000000000009 R09: 0000000000001000 [ 38.850386] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cb026fb20 [ 38.851232] R13: 00007ffe54ca2ec0 R14: 00007ffe54ca2ef0 R15: 00007ffe54ca3250 [ 38.852103] [ 38.852391] [ 38.852605] Allocated by task 211: [ 38.853028] kasan_save_stack+0x22/0x50 [ 38.853529] kasan_set_track+0x25/0x30 [ 38.854020] __kasan_slab_alloc+0x59/0x70 [ 38.854538] kmem_cache_alloc+0x16b/0x370 [ 38.855056] vm_area_dup+0x20/0x160 [ 38.855531] __split_vma+0x170/0x950 [ 38.855994] split_vma+0xc6/0x110 [ 38.856436] mprotect_fixup+0x8d2/0xb30 [ 38.856936] do_mprotect_pkey+0x87e/0xd40 [ 38.857451] __x64_sys_mprotect+0x78/0xc0 [ 38.857977] do_syscall_64+0x3f/0x90 [ 38.858447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859100] [ 38.859315] Freed by task 202: [ 38.859729] kasan_save_stack+0x22/0x50 [ 38.860233] kasan_set_track+0x25/0x30 [ 38.860728] kasan_save_free_info+0x2b/0x50 [ 38.861260] __kasan_slab_free+0x10a/0x190 [ 38.861793] kmem_cache_free+0x10d/0x4d0 [ 38.862303] rcu_core+0x8c8/0x2860 [ 38.862746] __do_softirq+0x1b7/0x7d4 [ 38.863226] [ 38.863448] Last potentially related work creation: [ 38.864041] kasan_save_stack+0x22/0x50 [ 38.864539] __kasan_record_aux_stack+0x8e/0xa0 [ 38.865117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.865758] remove_vma+0x139/0x170 [ 38.866208] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.866769] do_vmi_munmap+0x1f1/0x2b0 [ 38.867248] __vm_munmap+0x138/0x3a0 [ 38.867729] __x64_sys_munmap+0x59/0x80 [ 38.868224] do_syscall_64+0x3f/0x90 [ 38.868707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869350] [ 38.869564] Second to last potentially related work creation: [ 38.870244] kasan_save_stack+0x22/0x50 [ 38.870748] __kasan_record_aux_stack+0x8e/0xa0 [ 38.871327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.871995] remove_vma+0x139/0x170 [ 38.872444] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873001] do_vmi_munmap+0x1f1/0x2b0 [ 38.873489] mmap_region+0x1f9/0x2660 [ 38.873970] do_mmap+0x854/0xf00 [ 38.874400] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.874884] ksys_mmap_pgoff+0x3af/0x500 [ 38.875383] do_syscall_64+0x3f/0x90 [ 38.875876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876526] [ 38.876742] The buggy address belongs to the object at ffff88800e74f828 [ 38.876742] which belongs to the cache vm_area_struct of size 168 [ 38.878204] The buggy address is located 88 bytes inside of [ 38.878204] freed 168-byte region [ffff88800e74f828, ffff88800e74f8d0) [ 38.879620] [ 38.879834] The buggy address belongs to the physical page: [ 38.880507] page:00000000f8034999 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe74f [ 38.881583] memcg:ffff88800df15c01 [ 38.882007] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.882651] page_type: 0xffffffff() [ 38.883104] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.884041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df15c01 [ 38.884936] page dumped because: kasan: bad access detected [ 38.885602] [ 38.885817] Memory state around the buggy address: [ 38.886423] ffff88800e74f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.887274] ffff88800e74f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.888143] >ffff88800e74f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.888998] ^ [ 38.889406] ffff88800e74f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.890263] ffff88800e74f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.891120] ================================================================== [ 38.892236] Disabling lock debugging due to kernel taint [ 40.865240] BUG: Bad rss-counter state mm:0000000018d618fa type:MM_FILEPAGES val:33 [ 40.866221] BUG: Bad rss-counter state mm:0000000018d618fa type:MM_ANONPAGES val:22 [ 41.456951] BUG: Bad rss-counter state mm:00000000b9086933 type:MM_FILEPAGES val:33 [ 41.458154] BUG: Bad rss-counter state mm:00000000b9086933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44688' (ECDSA) to the list of known hosts. 2023/06/20 12:00:39 fuzzer started 2023/06/20 12:00:39 dialing manager at localhost:36067 2023/06/20 12:00:39 checking machine... 2023/06/20 12:00:39 checking revisions... [ 42.097784] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:00:39 testing simple program... [ 42.142194] cgroup: Unknown subsys name 'net' [ 42.178724] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:00:39 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=00007fff2f3553a8 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=00007fee261d95100000563480e33790 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=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff11001e00f3f RSI=ffff88800f007f48 RDI=ffffffff846000aa RBP=ffff88800f0079f8 RSP=ffff88800f007970 R8 =0000000000000001 R9 =ffff88800f0079e0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800f007a68 R13=0000000000000000 R14=ffff888016cd9b40 R15=ffff88800e594130 RIP=ffffffff811fc7a0 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 00007f797fbe7900 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=00007f798019e618 CR3=000000000ec1c000 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