syzkaller login: [ 28.753318] BUG: Bad rss-counter state mm:00000000259f22ea type:MM_FILEPAGES val:33 [ 28.755029] BUG: Bad rss-counter state mm:00000000259f22ea type:MM_ANONPAGES val:22 [ 28.922458] ================================================================== [ 28.923635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.924805] Read of size 8 at addr ffff88800e21ac20 by task sshd/220 [ 28.925851] [ 28.926104] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.927214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.928437] Call Trace: [ 28.928837] [ 28.929192] dump_stack_lvl+0x91/0xf0 [ 28.929830] print_report+0xcc/0x620 [ 28.930433] ? __virt_addr_valid+0x102/0x340 [ 28.931043] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931639] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932230] kasan_report+0xbe/0xf0 [ 28.932685] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.933279] vma_interval_tree_remove+0xc75/0xec0 [ 28.933881] vma_prepare+0xc54/0x11a0 [ 28.934397] __split_vma+0x5af/0x950 [ 28.934920] ? __pfx___split_vma+0x10/0x10 [ 28.935449] ? find_held_lock+0x2c/0x110 [ 28.935987] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.936558] ? lock_is_held_type+0x9f/0x120 [ 28.937100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.937824] ? mtree_range_walk+0x632/0x900 [ 28.938546] ? mas_walk+0x5c7/0x7c0 [ 28.939177] do_vmi_munmap+0x1f1/0x2b0 [ 28.939820] mmap_region+0x1f9/0x2660 [ 28.940310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.940839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.941583] ? __pfx_lock_acquire+0x10/0x10 [ 28.942129] ? __pfx_mmap_region+0x10/0x10 [ 28.942662] ? security_mmap_addr+0x7d/0xa0 [ 28.943190] ? get_unmapped_area+0x1f5/0x3f0 [ 28.943775] do_mmap+0x854/0xf00 [ 28.944225] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.944719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.945287] ksys_mmap_pgoff+0x3af/0x500 [ 28.945825] do_syscall_64+0x3f/0x90 [ 28.946311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946972] RIP: 0033:0x7f8145a1bd82 [ 28.947432] 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 [ 28.949641] RSP: 002b:00007ffe775405c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.950559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8145a1bd82 [ 28.951415] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8144e55000 [ 28.952297] RBP: 00007f8144e55000 R08: 0000000000000009 R09: 0000000000001000 [ 28.953148] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b660bbec0 [ 28.954039] R13: 00007ffe775405e0 R14: 00007ffe77540610 R15: 00007ffe77540970 [ 28.954914] [ 28.955210] [ 28.955431] Allocated by task 212: [ 28.955896] kasan_save_stack+0x22/0x50 [ 28.956408] kasan_set_track+0x25/0x30 [ 28.956909] __kasan_slab_alloc+0x59/0x70 [ 28.957438] kmem_cache_alloc+0x16b/0x370 [ 28.957980] vm_area_dup+0x20/0x160 [ 28.958443] __split_vma+0x170/0x950 [ 28.958912] split_vma+0xc6/0x110 [ 28.959356] mprotect_fixup+0x8d2/0xb30 [ 28.959910] do_mprotect_pkey+0x87e/0xd40 [ 28.960436] __x64_sys_mprotect+0x78/0xc0 [ 28.960965] do_syscall_64+0x3f/0x90 [ 28.961436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962116] [ 28.962339] Freed by task 212: [ 28.962729] kasan_save_stack+0x22/0x50 [ 28.963241] kasan_set_track+0x25/0x30 [ 28.963789] kasan_save_free_info+0x2b/0x50 [ 28.964335] __kasan_slab_free+0x10a/0x190 [ 28.964915] kmem_cache_free+0x10d/0x4d0 [ 28.965471] rcu_core+0x8c8/0x2860 [ 28.965964] __do_softirq+0x1b7/0x7d4 [ 28.966464] [ 28.966702] Last potentially related work creation: [ 28.967336] kasan_save_stack+0x22/0x50 [ 28.967884] __kasan_record_aux_stack+0x8e/0xa0 [ 28.968497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.969218] remove_vma+0x139/0x170 [ 28.969689] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.970250] do_vmi_munmap+0x1f1/0x2b0 [ 28.970738] __vm_munmap+0x138/0x3a0 [ 28.971205] __x64_sys_munmap+0x59/0x80 [ 28.971797] do_syscall_64+0x3f/0x90 [ 28.972301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.972967] [ 28.973184] Second to last potentially related work creation: [ 28.973931] kasan_save_stack+0x22/0x50 [ 28.974505] __kasan_record_aux_stack+0x8e/0xa0 [ 28.975164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.975886] remove_vma+0x139/0x170 [ 28.976363] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.976953] do_vmi_munmap+0x1f1/0x2b0 [ 28.977452] mmap_region+0x1f9/0x2660 [ 28.978080] do_mmap+0x854/0xf00 [ 28.978643] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.979233] ksys_mmap_pgoff+0x3af/0x500 [ 28.979772] do_syscall_64+0x3f/0x90 [ 28.980266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.980945] [ 28.981172] The buggy address belongs to the object at ffff88800e21abc8 [ 28.981172] which belongs to the cache vm_area_struct of size 168 [ 28.982773] The buggy address is located 88 bytes inside of [ 28.982773] freed 168-byte region [ffff88800e21abc8, ffff88800e21ac70) [ 28.984256] [ 28.984481] The buggy address belongs to the physical page: [ 28.985176] page:00000000f02d6f51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe21a [ 28.986355] memcg:ffff88800df76e01 [ 28.986832] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.987559] page_type: 0xffffffff() [ 28.988021] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e380 dead000000000005 [ 28.988951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df76e01 [ 28.989877] page dumped because: kasan: bad access detected [ 28.990542] [ 28.990793] Memory state around the buggy address: [ 28.991374] ffff88800e21ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.992235] ffff88800e21ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.993105] >ffff88800e21ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.993989] ^ [ 28.994518] ffff88800e21ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.995415] ffff88800e21ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.996276] ================================================================== [ 28.997426] Disabling lock debugging due to kernel taint [ 30.996177] BUG: Bad rss-counter state mm:00000000e64f1ea7 type:MM_FILEPAGES val:33 [ 30.997763] BUG: Bad rss-counter state mm:00000000e64f1ea7 type:MM_ANONPAGES val:22 [ 31.490483] BUG: Bad rss-counter state mm:000000000165c174 type:MM_FILEPAGES val:33 [ 31.491495] BUG: Bad rss-counter state mm:000000000165c174 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45433' (ECDSA) to the list of known hosts. 2023/06/21 10:29:23 fuzzer started 2023/06/21 10:29:23 dialing manager at localhost:36067 2023/06/21 10:29:23 checking machine... 2023/06/21 10:29:23 checking revisions... [ 32.230374] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:29:23 testing simple program... [ 32.270490] cgroup: Unknown subsys name 'net' [ 32.312467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:29:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015cb7c58 RCX=ffffffff818c8b80 RDX=0000000000000000 RSI=ffff88800d7de631 RDI=1ffff11002b96f8b RBP=ffff88801436a000 RSP=ffff888015cb76c0 R8 =0000000000000001 R9 =ffffed1002cbda30 R10=ffff8880165ed183 R11=00000000000b6a61 R12=ffff888019511318 R13=ffff888015cb7c5c R14=0000000000000020 R15=ffff8880165ed190 RIP=ffffffff814c086b 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 00007f455a018900 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=00007f4559436830 CR3=000000000cc00000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=18050da91349cbea00000000000ae988 XMM05=ffe97f07b24166ca00000000001338b0 XMM06=4fda316b135da52b0000000000132950 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888016b57ac8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffffffff85ba4d70 R15=0000000000000000 RIP=ffffffff8135b955 RFL=00000286 [--S--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 00007f318a83a900 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=00007f318adf1618 CR3=000000000ec8c000 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=563412feff00545000000000000080fe 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