syzkaller login: [ 31.313609] BUG: Bad rss-counter state mm:00000000e7d0eb2b type:MM_FILEPAGES val:33 [ 31.314860] BUG: Bad rss-counter state mm:00000000e7d0eb2b type:MM_ANONPAGES val:22 [ 31.354347] ================================================================== [ 31.355378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.356365] Read of size 8 at addr ffff88800e09ab38 by task sshd/221 [ 31.357172] [ 31.357402] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.358318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.359389] Call Trace: [ 31.359726] [ 31.360030] dump_stack_lvl+0x91/0xf0 [ 31.360550] print_report+0xcc/0x620 [ 31.361064] ? __virt_addr_valid+0x102/0x340 [ 31.361643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362952] kasan_report+0xbe/0xf0 [ 31.363492] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364155] vma_interval_tree_remove+0xc75/0xec0 [ 31.364796] vma_prepare+0xc54/0x11a0 [ 31.365304] __split_vma+0x5af/0x950 [ 31.365809] ? __pfx___split_vma+0x10/0x10 [ 31.366369] ? find_held_lock+0x2c/0x110 [ 31.366930] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.367578] ? lock_is_held_type+0x9f/0x120 [ 31.368167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.368813] ? mtree_range_walk+0x632/0x900 [ 31.369401] ? mas_walk+0x5c7/0x7c0 [ 31.369905] do_vmi_munmap+0x1f1/0x2b0 [ 31.370427] mmap_region+0x1f9/0x2660 [ 31.370942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.371511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.372275] ? __pfx_lock_acquire+0x10/0x10 [ 31.372838] ? __pfx_mmap_region+0x10/0x10 [ 31.373400] ? security_mmap_addr+0x7d/0xa0 [ 31.373965] ? get_unmapped_area+0x1f5/0x3f0 [ 31.374551] do_mmap+0x854/0xf00 [ 31.375014] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.376206] ksys_mmap_pgoff+0x3af/0x500 [ 31.376745] do_syscall_64+0x3f/0x90 [ 31.377258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377943] RIP: 0033:0x7efc250d0d82 [ 31.378431] 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 [ 31.380712] RSP: 002b:00007ffc83d4e758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.381850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc250d0d82 [ 31.382761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc2450a000 [ 31.383722] RBP: 00007efc2450a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.384625] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623b42caec0 [ 31.385524] R13: 00007ffc83d4e770 R14: 00007ffc83d4e7a0 R15: 00007ffc83d4eb00 [ 31.386436] [ 31.386746] [ 31.386976] Allocated by task 214: [ 31.387458] kasan_save_stack+0x22/0x50 [ 31.387999] kasan_set_track+0x25/0x30 [ 31.388521] __kasan_slab_alloc+0x59/0x70 [ 31.389076] kmem_cache_alloc+0x16b/0x370 [ 31.389628] vm_area_dup+0x20/0x160 [ 31.390107] __split_vma+0x170/0x950 [ 31.390599] split_vma+0xc6/0x110 [ 31.391068] mprotect_fixup+0x8d2/0xb30 [ 31.391625] do_mprotect_pkey+0x87e/0xd40 [ 31.392179] __x64_sys_mprotect+0x78/0xc0 [ 31.392727] do_syscall_64+0x3f/0x90 [ 31.393232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393921] [ 31.394148] Freed by task 214: [ 31.394569] kasan_save_stack+0x22/0x50 [ 31.395104] kasan_set_track+0x25/0x30 [ 31.395661] kasan_save_free_info+0x2b/0x50 [ 31.396225] __kasan_slab_free+0x10a/0x190 [ 31.396792] kmem_cache_free+0x10d/0x4d0 [ 31.397329] rcu_core+0x8c8/0x2860 [ 31.397797] __do_softirq+0x1b7/0x7d4 [ 31.398303] [ 31.398534] Last potentially related work creation: [ 31.399151] kasan_save_stack+0x22/0x50 [ 31.399717] __kasan_record_aux_stack+0x8e/0xa0 [ 31.400318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.400996] remove_vma+0x139/0x170 [ 31.401470] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.402063] do_vmi_munmap+0x1f1/0x2b0 [ 31.402575] __vm_munmap+0x138/0x3a0 [ 31.403070] __x64_sys_munmap+0x59/0x80 [ 31.403635] do_syscall_64+0x3f/0x90 [ 31.404148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404831] [ 31.405060] The buggy address belongs to the object at ffff88800e09aae0 [ 31.405060] which belongs to the cache vm_area_struct of size 168 [ 31.406633] The buggy address is located 88 bytes inside of [ 31.406633] freed 168-byte region [ffff88800e09aae0, ffff88800e09ab88) [ 31.408152] [ 31.408380] The buggy address belongs to the physical page: [ 31.409077] page:00000000d4a8ca70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe09a [ 31.410223] memcg:ffff88800c7e7a01 [ 31.410680] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.411410] page_type: 0xffffffff() [ 31.411884] raw: 0100000000000200 ffff8880087a0c80 ffffea0000361540 dead000000000002 [ 31.412857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7e7a01 [ 31.413820] page dumped because: kasan: bad access detected [ 31.414523] [ 31.414751] Memory state around the buggy address: [ 31.415394] ffff88800e09aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.416314] ffff88800e09aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.417212] >ffff88800e09ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.418135] ^ [ 31.418805] ffff88800e09ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.419894] ffff88800e09ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.420946] ================================================================== [ 31.422298] Disabling lock debugging due to kernel taint [ 33.357144] BUG: Bad rss-counter state mm:00000000bcad3f4c type:MM_FILEPAGES val:33 [ 33.358201] BUG: Bad rss-counter state mm:00000000bcad3f4c type:MM_ANONPAGES val:22 [ 33.942221] BUG: Bad rss-counter state mm:000000004c7d4075 type:MM_FILEPAGES val:33 [ 33.943437] BUG: Bad rss-counter state mm:000000004c7d4075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60779' (ECDSA) to the list of known hosts. 2023/06/21 02:49:14 fuzzer started 2023/06/21 02:49:14 dialing manager at localhost:36067 2023/06/21 02:49:14 checking machine... 2023/06/21 02:49:14 checking revisions... [ 34.574547] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:49:14 testing simple program... [ 34.629327] cgroup: Unknown subsys name 'net' [ 34.667192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:13 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=00007ffd488a34c8 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=00007f5357065510000055a0ac4dd790 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=ffff8880162eb438 RCX=0000000000000000 RDX=ffff8880168151c0 RSI=ffffffff818dd71f RDI=ffff8880162eb438 RBP=ffff88800f667a40 RSP=ffff88800f6679a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=2f6e6962732f7273 R12=dffffc0000000000 R13=ffff888008ea2320 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c089b 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 00007fa53cdf8900 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=00007fa53d3b00b0 CR3=000000000e0a0000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000