syzkaller login: [ 40.389723] BUG: Bad rss-counter state mm:00000000e7c7da41 type:MM_FILEPAGES val:31 [ 40.390543] BUG: Bad rss-counter state mm:00000000e7c7da41 type:MM_ANONPAGES val:22 [ 40.520490] ================================================================== [ 40.521530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.522471] Read of size 8 at addr ffff88800c556140 by task sshd/221 [ 40.523044] [ 40.523268] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.524019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.525078] Call Trace: [ 40.525407] [ 40.525686] dump_stack_lvl+0x91/0xf0 [ 40.526172] print_report+0xcc/0x620 [ 40.526667] ? __virt_addr_valid+0x102/0x340 [ 40.527221] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.527835] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.528495] kasan_report+0xbe/0xf0 [ 40.529010] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.529729] vma_interval_tree_remove+0xc75/0xec0 [ 40.530320] vma_prepare+0xc54/0x11a0 [ 40.530691] __split_vma+0x5af/0x950 [ 40.531048] ? __pfx___split_vma+0x10/0x10 [ 40.531462] ? find_held_lock+0x2c/0x110 [ 40.531837] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.532211] ? lock_is_held_type+0x9f/0x120 [ 40.532515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.532845] ? mtree_range_walk+0x632/0x900 [ 40.533137] ? mas_walk+0x5c7/0x7c0 [ 40.533502] do_vmi_munmap+0x1f1/0x2b0 [ 40.533798] mmap_region+0x1f9/0x2660 [ 40.534076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.534407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.534861] ? __pfx_lock_acquire+0x10/0x10 [ 40.535180] ? __pfx_mmap_region+0x10/0x10 [ 40.535484] ? security_mmap_addr+0x7d/0xa0 [ 40.535831] ? get_unmapped_area+0x1f5/0x3f0 [ 40.536173] do_mmap+0x854/0xf00 [ 40.536454] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.536742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.537055] ksys_mmap_pgoff+0x3af/0x500 [ 40.537330] do_syscall_64+0x3f/0x90 [ 40.537598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.537923] RIP: 0033:0x7fe8fbce3d82 [ 40.538156] 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 [ 40.539356] RSP: 002b:00007ffc79e50cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.539973] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8fbce3d82 [ 40.540480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8fb11d000 [ 40.540987] RBP: 00007fe8fb11d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.541470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cff40a3ec0 [ 40.541934] R13: 00007ffc79e50cf0 R14: 00007ffc79e50d20 R15: 00007ffc79e51080 [ 40.542353] [ 40.542511] [ 40.542619] Allocated by task 214: [ 40.542830] kasan_save_stack+0x22/0x50 [ 40.543081] kasan_set_track+0x25/0x30 [ 40.543429] __kasan_slab_alloc+0x59/0x70 [ 40.543827] kmem_cache_alloc+0x16b/0x370 [ 40.544118] vm_area_dup+0x20/0x160 [ 40.544406] __split_vma+0x170/0x950 [ 40.544641] split_vma+0xc6/0x110 [ 40.544879] mprotect_fixup+0x8d2/0xb30 [ 40.545142] do_mprotect_pkey+0x87e/0xd40 [ 40.545436] __x64_sys_mprotect+0x78/0xc0 [ 40.545711] do_syscall_64+0x3f/0x90 [ 40.545999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.546417] [ 40.546558] Freed by task 214: [ 40.546817] kasan_save_stack+0x22/0x50 [ 40.547114] kasan_set_track+0x25/0x30 [ 40.547434] kasan_save_free_info+0x2b/0x50 [ 40.547762] __kasan_slab_free+0x10a/0x190 [ 40.548081] kmem_cache_free+0x10d/0x4d0 [ 40.548398] rcu_core+0x8c8/0x2860 [ 40.548714] __do_softirq+0x1b7/0x7d4 [ 40.549012] [ 40.549197] Last potentially related work creation: [ 40.549567] kasan_save_stack+0x22/0x50 [ 40.549880] __kasan_record_aux_stack+0x8e/0xa0 [ 40.550230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.550622] remove_vma+0x139/0x170 [ 40.550860] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.551153] do_vmi_munmap+0x1f1/0x2b0 [ 40.551411] __vm_munmap+0x138/0x3a0 [ 40.551656] __x64_sys_munmap+0x59/0x80 [ 40.551932] do_syscall_64+0x3f/0x90 [ 40.552197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.552539] [ 40.552651] The buggy address belongs to the object at ffff88800c5560e8 [ 40.552651] which belongs to the cache vm_area_struct of size 168 [ 40.553521] The buggy address is located 88 bytes inside of [ 40.553521] freed 168-byte region [ffff88800c5560e8, ffff88800c556190) [ 40.554416] [ 40.554553] The buggy address belongs to the physical page: [ 40.554983] page:00000000e2c5e05d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc556 [ 40.555674] memcg:ffff88801587fb01 [ 40.555907] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.556294] page_type: 0xffffffff() [ 40.556530] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.557020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801587fb01 [ 40.557532] page dumped because: kasan: bad access detected [ 40.557911] [ 40.558026] Memory state around the buggy address: [ 40.558343] ffff88800c556000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.558811] ffff88800c556080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.559282] >ffff88800c556100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.559750] ^ [ 40.560107] ffff88800c556180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.560584] ffff88800c556200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.561029] ================================================================== [ 40.561727] Disabling lock debugging due to kernel taint [ 42.329555] BUG: Bad rss-counter state mm:000000005b1264e7 type:MM_FILEPAGES val:33 [ 42.330101] BUG: Bad rss-counter state mm:000000005b1264e7 type:MM_ANONPAGES val:22 [ 42.677387] BUG: Bad rss-counter state mm:000000003687329d type:MM_FILEPAGES val:33 [ 42.678176] BUG: Bad rss-counter state mm:000000003687329d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46793' (ECDSA) to the list of known hosts. 2023/06/20 00:06:04 fuzzer started 2023/06/20 00:06:05 dialing manager at localhost:44161 2023/06/20 00:06:05 checking machine... 2023/06/20 00:06:05 checking revisions... [ 44.309564] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:06:05 testing simple program... [ 44.379266] cgroup: Unknown subsys name 'net' [ 44.469700] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:05:54 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864a9d4e RDX=0000000000000008 RSI=ffff88800ffafc00 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce099f8 R8 =ffffffff864a9d52 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b3eeb R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88800ffafc08 R15=ffff88806ce09a70 RIP=ffffffff811303f0 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 00007f18c55c2900 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=00007f18c557b008 CR3=000000000de0e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=000055fc5ae0f218 CR3=0000000005482000 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=00007f5a4b8b8510000055773ad15790 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