syzkaller login: [ 41.505286] BUG: Bad rss-counter state mm:00000000802cc094 type:MM_FILEPAGES val:33 [ 41.506486] BUG: Bad rss-counter state mm:00000000802cc094 type:MM_ANONPAGES val:22 [ 41.544486] ================================================================== [ 41.545571] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.546667] Read of size 8 at addr ffff888018d32c20 by task sshd/219 [ 41.547663] [ 41.547882] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.548884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.549979] Call Trace: [ 41.550382] [ 41.550753] dump_stack_lvl+0x91/0xf0 [ 41.551288] print_report+0xcc/0x620 [ 41.551833] ? __virt_addr_valid+0x102/0x340 [ 41.552465] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.553206] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.553934] kasan_report+0xbe/0xf0 [ 41.554493] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.555439] vma_interval_tree_remove+0xc75/0xec0 [ 41.556294] vma_prepare+0xc54/0x11a0 [ 41.557084] __split_vma+0x5af/0x950 [ 41.557726] ? __pfx___split_vma+0x10/0x10 [ 41.558572] ? find_held_lock+0x2c/0x110 [ 41.559311] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.560061] ? lock_is_held_type+0x9f/0x120 [ 41.560683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.561452] ? mtree_range_walk+0x632/0x900 [ 41.562099] ? mas_walk+0x5c7/0x7c0 [ 41.562652] do_vmi_munmap+0x1f1/0x2b0 [ 41.563263] mmap_region+0x1f9/0x2660 [ 41.563782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.564304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.565049] ? __pfx_lock_acquire+0x10/0x10 [ 41.565596] ? __pfx_mmap_region+0x10/0x10 [ 41.566131] ? security_mmap_addr+0x7d/0xa0 [ 41.566672] ? get_unmapped_area+0x1f5/0x3f0 [ 41.567225] do_mmap+0x854/0xf00 [ 41.567686] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.568189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.568795] ksys_mmap_pgoff+0x3af/0x500 [ 41.569317] do_syscall_64+0x3f/0x90 [ 41.569811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.570477] RIP: 0033:0x7fc09de97d82 [ 41.570939] 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 [ 41.573138] RSP: 002b:00007ffcf65cb5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.574061] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc09de97d82 [ 41.574919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc09d2d1000 [ 41.575783] RBP: 00007fc09d2d1000 R08: 0000000000000009 R09: 0000000000001000 [ 41.576661] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b745a2f70 [ 41.577535] R13: 00007ffcf65cb5d0 R14: 00007ffcf65cb600 R15: 00007ffcf65cb960 [ 41.578423] [ 41.578716] [ 41.578937] Allocated by task 212: [ 41.579380] kasan_save_stack+0x22/0x50 [ 41.579891] kasan_set_track+0x25/0x30 [ 41.580409] __kasan_slab_alloc+0x59/0x70 [ 41.580964] kmem_cache_alloc+0x16b/0x370 [ 41.581503] vm_area_dup+0x20/0x160 [ 41.581959] __split_vma+0x170/0x950 [ 41.582461] split_vma+0xc6/0x110 [ 41.582907] mprotect_fixup+0x8d2/0xb30 [ 41.583451] do_mprotect_pkey+0x87e/0xd40 [ 41.583983] __x64_sys_mprotect+0x78/0xc0 [ 41.584522] do_syscall_64+0x3f/0x90 [ 41.585020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.585683] [ 41.585903] Freed by task 13: [ 41.586291] kasan_save_stack+0x22/0x50 [ 41.586825] kasan_set_track+0x25/0x30 [ 41.587324] kasan_save_free_info+0x2b/0x50 [ 41.587870] __kasan_slab_free+0x10a/0x190 [ 41.588415] kmem_cache_free+0x10d/0x4d0 [ 41.588934] rcu_core+0x8c8/0x2860 [ 41.589450] __do_softirq+0x1b7/0x7d4 [ 41.589923] [ 41.590138] Last potentially related work creation: [ 41.590744] kasan_save_stack+0x22/0x50 [ 41.591246] __kasan_record_aux_stack+0x8e/0xa0 [ 41.591843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.592504] remove_vma+0x139/0x170 [ 41.592981] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.593551] do_vmi_munmap+0x1f1/0x2b0 [ 41.594041] __vm_munmap+0x138/0x3a0 [ 41.594529] __x64_sys_munmap+0x59/0x80 [ 41.595033] do_syscall_64+0x3f/0x90 [ 41.595530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.596184] [ 41.596422] The buggy address belongs to the object at ffff888018d32bc8 [ 41.596422] which belongs to the cache vm_area_struct of size 168 [ 41.597919] The buggy address is located 88 bytes inside of [ 41.597919] freed 168-byte region [ffff888018d32bc8, ffff888018d32c70) [ 41.599333] [ 41.599554] The buggy address belongs to the physical page: [ 41.600218] page:000000002c1b8a12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d32 [ 41.601361] memcg:ffff88800d1df201 [ 41.601798] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.602464] page_type: 0xffffffff() [ 41.602917] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.603851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1df201 [ 41.604809] page dumped because: kasan: bad access detected [ 41.605490] [ 41.605705] Memory state around the buggy address: [ 41.606328] ffff888018d32b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.607217] ffff888018d32b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.608338] >ffff888018d32c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.609232] ^ [ 41.609776] ffff888018d32c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.610654] ffff888018d32d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.611524] ================================================================== [ 41.612468] Disabling lock debugging due to kernel taint [ 43.547009] BUG: Bad rss-counter state mm:000000002e168a72 type:MM_FILEPAGES val:33 [ 43.548004] BUG: Bad rss-counter state mm:000000002e168a72 type:MM_ANONPAGES val:22 [ 44.034958] BUG: Bad rss-counter state mm:00000000c3d0a367 type:MM_FILEPAGES val:33 [ 44.036132] BUG: Bad rss-counter state mm:00000000c3d0a367 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49193' (ECDSA) to the list of known hosts. 2023/06/19 20:16:36 fuzzer started 2023/06/19 20:16:36 dialing manager at localhost:44161 2023/06/19 20:16:36 checking machine... 2023/06/19 20:16:36 checking revisions... [ 44.763485] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:16:36 testing simple program... [ 44.811031] cgroup: Unknown subsys name 'net' [ 44.849183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f938c2d4650 CR3=000000000d98a000 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=2035333a36313a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000007 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffff88800efaf368 RSP=ffff88800efaf208 R8 =ffffffff86088c1a R9 =ffff88800efaf350 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffff88800efaf358 R14=ffff88800efaf351 R15=ffff88800efaf310 RIP=ffffffff8112fc27 RFL=00000202 [-------] 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 00007f938bd1f900 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=00007f938c2d6618 CR3=0000000018d9e000 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