syzkaller login: [ 32.240678] BUG: Bad rss-counter state mm:00000000692ea144 type:MM_FILEPAGES val:33 [ 32.241669] BUG: Bad rss-counter state mm:00000000692ea144 type:MM_ANONPAGES val:22 [ 32.415312] ================================================================== [ 32.416435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.417381] Read of size 8 at addr ffff88800c6cc5c8 by task sshd/220 [ 32.418269] [ 32.418500] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.419384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.420409] Call Trace: [ 32.420735] [ 32.421020] dump_stack_lvl+0x91/0xf0 [ 32.421525] print_report+0xcc/0x620 [ 32.422030] ? __virt_addr_valid+0x102/0x340 [ 32.422593] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423228] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423889] kasan_report+0xbe/0xf0 [ 32.424371] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.425013] vma_interval_tree_remove+0xc75/0xec0 [ 32.425632] vma_prepare+0xc54/0x11a0 [ 32.426135] __split_vma+0x5af/0x950 [ 32.426632] ? __pfx___split_vma+0x10/0x10 [ 32.427181] ? find_held_lock+0x2c/0x110 [ 32.427726] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.428312] ? lock_is_held_type+0x9f/0x120 [ 32.428876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.429498] ? mtree_range_walk+0x632/0x900 [ 32.430077] ? mas_walk+0x5c7/0x7c0 [ 32.430570] do_vmi_munmap+0x1f1/0x2b0 [ 32.431077] mmap_region+0x1f9/0x2660 [ 32.431617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.432154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.432885] ? __pfx_lock_acquire+0x10/0x10 [ 32.433445] ? __pfx_mmap_region+0x10/0x10 [ 32.433990] ? security_mmap_addr+0x7d/0xa0 [ 32.434529] ? get_unmapped_area+0x1f5/0x3f0 [ 32.435096] do_mmap+0x854/0xf00 [ 32.435597] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.436115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.436698] ksys_mmap_pgoff+0x3af/0x500 [ 32.437209] do_syscall_64+0x3f/0x90 [ 32.437702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.438381] RIP: 0033:0x7faca38b2d82 [ 32.438857] 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 [ 32.441048] RSP: 002b:00007ffe7b1d2cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.441981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faca38b2d82 [ 32.442858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faca2cec000 [ 32.443745] RBP: 00007faca2cec000 R08: 0000000000000009 R09: 0000000000001000 [ 32.444624] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a028793d90 [ 32.445505] R13: 00007ffe7b1d2cf0 R14: 00007ffe7b1d2d20 R15: 00007ffe7b1d3080 [ 32.446394] [ 32.446702] [ 32.446920] Allocated by task 213: [ 32.447363] kasan_save_stack+0x22/0x50 [ 32.447905] kasan_set_track+0x25/0x30 [ 32.448424] __kasan_slab_alloc+0x59/0x70 [ 32.448972] kmem_cache_alloc+0x16b/0x370 [ 32.449512] vm_area_dup+0x20/0x160 [ 32.449968] __split_vma+0x170/0x950 [ 32.450454] split_vma+0xc6/0x110 [ 32.450913] mprotect_fixup+0x8d2/0xb30 [ 32.451442] do_mprotect_pkey+0x87e/0xd40 [ 32.451995] __x64_sys_mprotect+0x78/0xc0 [ 32.452525] do_syscall_64+0x3f/0x90 [ 32.453027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.453689] [ 32.453908] Freed by task 210: [ 32.454317] kasan_save_stack+0x22/0x50 [ 32.454840] kasan_set_track+0x25/0x30 [ 32.455341] kasan_save_free_info+0x2b/0x50 [ 32.455905] __kasan_slab_free+0x10a/0x190 [ 32.456458] kmem_cache_free+0x10d/0x4d0 [ 32.456985] rcu_core+0x8c8/0x2860 [ 32.457440] __do_softirq+0x1b7/0x7d4 [ 32.457929] [ 32.458155] Last potentially related work creation: [ 32.458746] kasan_save_stack+0x22/0x50 [ 32.459272] __kasan_record_aux_stack+0x8e/0xa0 [ 32.459887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.460554] remove_vma+0x139/0x170 [ 32.461040] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.461613] do_vmi_munmap+0x1f1/0x2b0 [ 32.462116] __vm_munmap+0x138/0x3a0 [ 32.462603] __x64_sys_munmap+0x59/0x80 [ 32.463141] do_syscall_64+0x3f/0x90 [ 32.463653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.464308] [ 32.464535] The buggy address belongs to the object at ffff88800c6cc570 [ 32.464535] which belongs to the cache vm_area_struct of size 168 [ 32.466067] The buggy address is located 88 bytes inside of [ 32.466067] freed 168-byte region [ffff88800c6cc570, ffff88800c6cc618) [ 32.467592] [ 32.467828] The buggy address belongs to the physical page: [ 32.468544] page:00000000a8e56856 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6cc [ 32.469728] memcg:ffff88800ec74001 [ 32.470186] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.470884] page_type: 0xffffffff() [ 32.471372] raw: 0100000000000200 ffff88800879fc80 ffffea0000315c00 dead000000000008 [ 32.472381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec74001 [ 32.473573] page dumped because: kasan: bad access detected [ 32.474321] [ 32.474560] Memory state around the buggy address: [ 32.475185] ffff88800c6cc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.476137] ffff88800c6cc500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.477076] >ffff88800c6cc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.478010] ^ [ 32.478739] ffff88800c6cc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.479677] ffff88800c6cc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.480607] ================================================================== [ 32.481989] Disabling lock debugging due to kernel taint [ 34.737835] BUG: Bad rss-counter state mm:00000000876a1db7 type:MM_FILEPAGES val:33 [ 34.738912] BUG: Bad rss-counter state mm:00000000876a1db7 type:MM_ANONPAGES val:22 [ 35.240137] BUG: Bad rss-counter state mm:0000000094c89ae8 type:MM_FILEPAGES val:33 [ 35.241312] BUG: Bad rss-counter state mm:0000000094c89ae8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13251' (ECDSA) to the list of known hosts. 2023/06/20 07:50:04 fuzzer started 2023/06/20 07:50:05 dialing manager at localhost:44161 2023/06/20 07:50:05 checking machine... 2023/06/20 07:50:05 checking revisions... [ 35.884003] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:50:05 testing simple program... [ 35.929843] cgroup: Unknown subsys name 'net' [ 35.978051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:01 Registers: info registers vcpu 0 RAX=000055be26c5f620 RBX=000055be26c5f360 RCX=00000000000001af RDX=0000000000000000 RSI=000055be26c65240 RDI=000055be26c5cc70 RBP=000055be26c5f620 RSP=00007ffcda1271f0 R8 =0000000000000022 R9 =00007ffcda143080 R10=00007ffcda1430f0 R11=000000000000ebca R12=0000000000000001 R13=0000000000000000 R14=00007ffcda127220 R15=000000000000000c RIP=00007f3f559a2980 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3f54e2a900 00000000 00000000 GS =0000 0000000000000000 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=00007f3f542921c0 CR3=000000000d9e6000 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=1421a4ce7ae853bbee415f88ebf76a22 XMM02=eff9b2d0a8fce9cb000000000011f600 XMM03=2c67c8bc2e329bc3000000000011f728 XMM04=891eaa91e9bd46e400000000000ae988 XMM05=6c046b6ce3bbbe9200000000001349e8 XMM06=00c3ffa147b8d85700000000001337d8 XMM07=fb795ef6d65770560000000000123df0 XMM08=2c67c8bc2e329bc3000000000011f728 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880103d7a28 RCX=0000000000000001 RDX=1ffff1100207af5d RSI=ffffffff8363de43 RDI=ffff8880103d7a34 RBP=ffff8880103d7ae8 RSP=ffff8880103d7940 R8 =0000000000000001 R9 =ffff8880103d79a0 R10=0000000000038001 R11=000000000008a96b R12=ffff8880103d7a28 R13=0000000000000000 R14=ffff8880102d8000 R15=0000000000000001 RIP=ffffffff813ad4f7 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 00007f6762f3a900 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=00007f67634f20b0 CR3=0000000016e44000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000