syzkaller login: [ 31.540861] BUG: Bad rss-counter state mm:0000000008ba74b8 type:MM_FILEPAGES val:33 [ 31.542062] BUG: Bad rss-counter state mm:0000000008ba74b8 type:MM_ANONPAGES val:22 [ 31.704862] ================================================================== [ 31.705797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.706723] Read of size 8 at addr ffff88800fe92c20 by task sshd/220 [ 31.707524] [ 31.707751] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.708718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.709706] Call Trace: [ 31.710024] [ 31.710328] dump_stack_lvl+0x91/0xf0 [ 31.710818] print_report+0xcc/0x620 [ 31.711307] ? __virt_addr_valid+0x102/0x340 [ 31.711872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.712498] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.713128] kasan_report+0xbe/0xf0 [ 31.713610] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.714228] vma_interval_tree_remove+0xc75/0xec0 [ 31.714844] vma_prepare+0xc54/0x11a0 [ 31.715323] __split_vma+0x5af/0x950 [ 31.715811] ? __pfx___split_vma+0x10/0x10 [ 31.716335] ? find_held_lock+0x2c/0x110 [ 31.716856] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.717426] ? lock_is_held_type+0x9f/0x120 [ 31.717965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.718572] ? mtree_range_walk+0x632/0x900 [ 31.719125] ? mas_walk+0x5c7/0x7c0 [ 31.719622] do_vmi_munmap+0x1f1/0x2b0 [ 31.720113] mmap_region+0x1f9/0x2660 [ 31.720592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.721100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.721809] ? __pfx_lock_acquire+0x10/0x10 [ 31.722341] ? __pfx_mmap_region+0x10/0x10 [ 31.722872] ? security_mmap_addr+0x7d/0xa0 [ 31.723402] ? get_unmapped_area+0x1f5/0x3f0 [ 31.723959] do_mmap+0x854/0xf00 [ 31.724400] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.724896] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.725460] ksys_mmap_pgoff+0x3af/0x500 [ 31.725965] do_syscall_64+0x3f/0x90 [ 31.726454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.727103] RIP: 0033:0x7f0ba7077d82 [ 31.727582] 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 [ 31.729733] RSP: 002b:00007ffce4dc4858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.730638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ba7077d82 [ 31.731507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ba64b1000 [ 31.732354] RBP: 00007f0ba64b1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.733194] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5b5b9eec0 [ 31.734035] R13: 00007ffce4dc4870 R14: 00007ffce4dc48a0 R15: 00007ffce4dc4c00 [ 31.734889] [ 31.735183] [ 31.735397] Allocated by task 213: [ 31.735838] kasan_save_stack+0x22/0x50 [ 31.736343] kasan_set_track+0x25/0x30 [ 31.736834] __kasan_slab_alloc+0x59/0x70 [ 31.737360] kmem_cache_alloc+0x16b/0x370 [ 31.737875] vm_area_dup+0x20/0x160 [ 31.738347] __split_vma+0x170/0x950 [ 31.738808] split_vma+0xc6/0x110 [ 31.739260] mprotect_fixup+0x8d2/0xb30 [ 31.739782] do_mprotect_pkey+0x87e/0xd40 [ 31.740305] __x64_sys_mprotect+0x78/0xc0 [ 31.740829] do_syscall_64+0x3f/0x90 [ 31.741320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.741968] [ 31.742186] Freed by task 213: [ 31.742586] kasan_save_stack+0x22/0x50 [ 31.743086] kasan_set_track+0x25/0x30 [ 31.743585] kasan_save_free_info+0x2b/0x50 [ 31.744118] __kasan_slab_free+0x10a/0x190 [ 31.744663] kmem_cache_free+0x10d/0x4d0 [ 31.745178] rcu_core+0x8c8/0x2860 [ 31.745619] __do_softirq+0x1b7/0x7d4 [ 31.746102] [ 31.746324] Last potentially related work creation: [ 31.746929] kasan_save_stack+0x22/0x50 [ 31.747433] __kasan_record_aux_stack+0x8e/0xa0 [ 31.748025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.748675] remove_vma+0x139/0x170 [ 31.749124] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.749684] do_vmi_munmap+0x1f1/0x2b0 [ 31.750173] __vm_munmap+0x138/0x3a0 [ 31.750650] __x64_sys_munmap+0x59/0x80 [ 31.751148] do_syscall_64+0x3f/0x90 [ 31.751632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.752280] [ 31.752502] The buggy address belongs to the object at ffff88800fe92bc8 [ 31.752502] which belongs to the cache vm_area_struct of size 168 [ 31.753959] The buggy address is located 88 bytes inside of [ 31.753959] freed 168-byte region [ffff88800fe92bc8, ffff88800fe92c70) [ 31.755391] [ 31.755614] The buggy address belongs to the physical page: [ 31.756268] page:0000000066b6e9e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe92 [ 31.757348] memcg:ffff88800f1f1d01 [ 31.757775] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.758426] page_type: 0xffffffff() [ 31.758875] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.759814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1f1d01 [ 31.760711] page dumped because: kasan: bad access detected [ 31.761370] [ 31.761585] Memory state around the buggy address: [ 31.762163] ffff88800fe92b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.763020] ffff88800fe92b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.763884] >ffff88800fe92c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.764733] ^ [ 31.765259] ffff88800fe92c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.766110] ffff88800fe92d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.766959] ================================================================== [ 31.767957] Disabling lock debugging due to kernel taint [ 33.877947] BUG: Bad rss-counter state mm:0000000042c636df type:MM_FILEPAGES val:33 [ 33.879100] BUG: Bad rss-counter state mm:0000000042c636df type:MM_ANONPAGES val:22 [ 34.295566] BUG: Bad rss-counter state mm:000000003751eb78 type:MM_FILEPAGES val:33 [ 34.296607] BUG: Bad rss-counter state mm:000000003751eb78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52225' (ECDSA) to the list of known hosts. 2023/06/21 00:37:58 fuzzer started 2023/06/21 00:37:59 dialing manager at localhost:36067 2023/06/21 00:37:59 checking machine... 2023/06/21 00:37:59 checking revisions... [ 35.072827] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:37:59 testing simple program... [ 35.112346] cgroup: Unknown subsys name 'net' [ 35.159588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:58 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888019e07b38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000010 R15=ffff8880169f3000 RIP=ffffffff8180f173 RFL=00000283 [--S---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 00007f2fe02d5900 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=00007f2fe088d0b0 CR3=000000000eaba000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=1ffff1100d9e134a RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff860a1444 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09ff8 R15=ffff88806cf09a50 RIP=ffffffff81131271 RFL=00000212 [----A--] 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 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=00007f00169994f0 CR3=000000000d632000 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=4a602bdf13efb681f845e9cda2a89850 XMM02=00000000001199e8eff9b2d0a8fce9cb XMM03=0000000000119ab82c67c8bc2e329bc3 XMM04=295dd909835d077200000000000ae988 XMM05=19e9129bd510f2350000000000131268 XMM06=4fda316b135da52b00000000001310f0 XMM07=e042d86d42eb936e0000000000121620 XMM08=6e98bdbc3ea6fece0000000000119ab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000