syzkaller login: [ 30.488526] BUG: Bad rss-counter state mm:000000004839358a type:MM_FILEPAGES val:33 [ 30.489912] BUG: Bad rss-counter state mm:000000004839358a type:MM_ANONPAGES val:22 [ 30.525699] ================================================================== [ 30.526706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.527675] Read of size 8 at addr ffff88800c6c2880 by task sshd/219 [ 30.528447] [ 30.528664] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.529531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.530497] Call Trace: [ 30.530815] [ 30.531100] dump_stack_lvl+0x91/0xf0 [ 30.531598] print_report+0xcc/0x620 [ 30.532080] ? __virt_addr_valid+0x102/0x340 [ 30.532634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.533255] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.533874] kasan_report+0xbe/0xf0 [ 30.534351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.534972] vma_interval_tree_remove+0xc75/0xec0 [ 30.535591] vma_prepare+0xc54/0x11a0 [ 30.536070] __split_vma+0x5af/0x950 [ 30.536538] ? __pfx___split_vma+0x10/0x10 [ 30.537077] ? find_held_lock+0x2c/0x110 [ 30.537599] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.538167] ? lock_is_held_type+0x9f/0x120 [ 30.538709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.539310] ? mtree_range_walk+0x632/0x900 [ 30.539871] ? mas_walk+0x5c7/0x7c0 [ 30.540355] do_vmi_munmap+0x1f1/0x2b0 [ 30.540844] mmap_region+0x1f9/0x2660 [ 30.541321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.541830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.542550] ? __pfx_lock_acquire+0x10/0x10 [ 30.543085] ? __pfx_mmap_region+0x10/0x10 [ 30.543614] ? security_mmap_addr+0x7d/0xa0 [ 30.544151] ? get_unmapped_area+0x1f5/0x3f0 [ 30.544707] do_mmap+0x854/0xf00 [ 30.545146] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.545643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.546206] ksys_mmap_pgoff+0x3af/0x500 [ 30.546712] do_syscall_64+0x3f/0x90 [ 30.547196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.547861] RIP: 0033:0x7f03cea60d82 [ 30.548316] 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 [ 30.550416] RSP: 002b:00007ffd97df8098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.551317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03cea60d82 [ 30.552172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03cde9a000 [ 30.553009] RBP: 00007f03cde9a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.553986] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c9fdfeb20 [ 30.554836] R13: 00007ffd97df80b0 R14: 00007ffd97df80e0 R15: 00007ffd97df8440 [ 30.555721] [ 30.556016] [ 30.556232] Allocated by task 212: [ 30.556661] kasan_save_stack+0x22/0x50 [ 30.557164] kasan_set_track+0x25/0x30 [ 30.557657] __kasan_slab_alloc+0x59/0x70 [ 30.558178] kmem_cache_alloc+0x16b/0x370 [ 30.558688] vm_area_dup+0x20/0x160 [ 30.559141] __split_vma+0x170/0x950 [ 30.559615] split_vma+0xc6/0x110 [ 30.560048] mprotect_fixup+0x8d2/0xb30 [ 30.560548] do_mprotect_pkey+0x87e/0xd40 [ 30.561066] __x64_sys_mprotect+0x78/0xc0 [ 30.561585] do_syscall_64+0x3f/0x90 [ 30.562059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.562694] [ 30.562910] Freed by task 212: [ 30.563299] kasan_save_stack+0x22/0x50 [ 30.563826] kasan_set_track+0x25/0x30 [ 30.564322] kasan_save_free_info+0x2b/0x50 [ 30.564852] __kasan_slab_free+0x10a/0x190 [ 30.565384] kmem_cache_free+0x10d/0x4d0 [ 30.565885] rcu_core+0x8c8/0x2860 [ 30.566325] __do_softirq+0x1b7/0x7d4 [ 30.566800] [ 30.567014] Last potentially related work creation: [ 30.567614] kasan_save_stack+0x22/0x50 [ 30.568132] __kasan_record_aux_stack+0x8e/0xa0 [ 30.568697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.569329] remove_vma+0x139/0x170 [ 30.569774] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.570331] do_vmi_munmap+0x1f1/0x2b0 [ 30.570810] __vm_munmap+0x138/0x3a0 [ 30.571283] __x64_sys_munmap+0x59/0x80 [ 30.571796] do_syscall_64+0x3f/0x90 [ 30.572270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.572909] [ 30.573124] The buggy address belongs to the object at ffff88800c6c2828 [ 30.573124] which belongs to the cache vm_area_struct of size 168 [ 30.574596] The buggy address is located 88 bytes inside of [ 30.574596] freed 168-byte region [ffff88800c6c2828, ffff88800c6c28d0) [ 30.575993] [ 30.576213] The buggy address belongs to the physical page: [ 30.576865] page:0000000013747fbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6c2 [ 30.577943] memcg:ffff88800caedd01 [ 30.578373] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.579015] page_type: 0xffffffff() [ 30.579483] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.580407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caedd01 [ 30.581304] page dumped because: kasan: bad access detected [ 30.581962] [ 30.582181] Memory state around the buggy address: [ 30.582764] ffff88800c6c2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.583618] ffff88800c6c2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.584481] >ffff88800c6c2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.585340] ^ [ 30.585755] ffff88800c6c2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.586617] ffff88800c6c2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.587490] ================================================================== [ 30.588633] Disabling lock debugging due to kernel taint [ 32.487587] BUG: Bad rss-counter state mm:00000000f6718eed type:MM_FILEPAGES val:33 [ 32.489108] BUG: Bad rss-counter state mm:00000000f6718eed type:MM_ANONPAGES val:22 [ 33.051439] BUG: Bad rss-counter state mm:0000000005a446e7 type:MM_FILEPAGES val:33 [ 33.052697] BUG: Bad rss-counter state mm:0000000005a446e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26951' (ECDSA) to the list of known hosts. 2023/06/21 05:33:43 fuzzer started 2023/06/21 05:33:43 dialing manager at localhost:36067 2023/06/21 05:33:43 checking machine... 2023/06/21 05:33:43 checking revisions... [ 33.690084] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:33:44 testing simple program... [ 33.736234] cgroup: Unknown subsys name 'net' [ 33.784987] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000012 RCX=0000000000000000 RDX=ffff888015f09b40 RSI=0000000000000012 RDI=ffff888008f7a808 RBP=ffff888019fba8e8 RSP=ffff888018e77c00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000012 R11=0000000000000001 R12=ffff888008f7a808 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844fe904 RFL=00000293 [--S-A-C] 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 00007fdbb3058900 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=00007fdbb360d650 CR3=000000000c9c8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800cb21b80 RCX=ffffffff811fbfaa RDX=ffffed1002be1369 RSI=0000000000000008 RDI=ffff888015f09b40 RBP=ffff888015f09b40 RSP=ffff888018e77e10 R8 =0000000000000001 R9 =ffffed1002be1368 R10=ffff888015f09b47 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=1ffff110031cefc5 R15=0000000000000000 RIP=ffffffff811fbfb1 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 00007fdbb3058900 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=00007fdbb36100b0 CR3=000000000c9c8000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000