syzkaller login: [ 60.880797] BUG: Bad rss-counter state mm:000000006f192f58 type:MM_FILEPAGES val:33 [ 60.882214] BUG: Bad rss-counter state mm:000000006f192f58 type:MM_ANONPAGES val:22 [ 61.057417] ================================================================== [ 61.058492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.059737] Read of size 8 at addr ffff88800e496798 by task sshd/220 [ 61.060563] [ 61.060795] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.061710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.062744] Call Trace: [ 61.063094] [ 61.063395] dump_stack_lvl+0x91/0xf0 [ 61.063918] print_report+0xcc/0x620 [ 61.064434] ? __virt_addr_valid+0x102/0x340 [ 61.065020] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.065675] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.066338] kasan_report+0xbe/0xf0 [ 61.066856] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.067532] vma_interval_tree_remove+0xc75/0xec0 [ 61.068180] vma_prepare+0xc54/0x11a0 [ 61.068698] __split_vma+0x5af/0x950 [ 61.069209] ? __pfx___split_vma+0x10/0x10 [ 61.069781] ? find_held_lock+0x2c/0x110 [ 61.070339] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.070971] ? lock_is_held_type+0x9f/0x120 [ 61.071552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.072201] ? mtree_range_walk+0x632/0x900 [ 61.072791] ? mas_walk+0x5c7/0x7c0 [ 61.073293] do_vmi_munmap+0x1f1/0x2b0 [ 61.073822] mmap_region+0x1f9/0x2660 [ 61.074341] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.074890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.075680] ? __pfx_lock_acquire+0x10/0x10 [ 61.076252] ? __pfx_mmap_region+0x10/0x10 [ 61.076821] ? security_mmap_addr+0x7d/0xa0 [ 61.077390] ? get_unmapped_area+0x1f5/0x3f0 [ 61.077982] do_mmap+0x854/0xf00 [ 61.078456] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.078995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.079597] ksys_mmap_pgoff+0x3af/0x500 [ 61.080148] do_syscall_64+0x3f/0x90 [ 61.080664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.081371] RIP: 0033:0x7f908f743d82 [ 61.081871] 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 [ 61.084162] RSP: 002b:00007ffec2e00308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.085124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f908f743d82 [ 61.086032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f908eb7d000 [ 61.086954] RBP: 00007f908eb7d000 R08: 0000000000000009 R09: 0000000000001000 [ 61.087856] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4dcdd4ec0 [ 61.088785] R13: 00007ffec2e00320 R14: 00007ffec2e00350 R15: 00007ffec2e006b0 [ 61.089702] [ 61.090017] [ 61.090247] Allocated by task 213: [ 61.090703] kasan_save_stack+0x22/0x50 [ 61.091256] kasan_set_track+0x25/0x30 [ 61.091788] __kasan_slab_alloc+0x59/0x70 [ 61.092345] kmem_cache_alloc+0x16b/0x370 [ 61.092905] vm_area_dup+0x20/0x160 [ 61.093388] __split_vma+0x170/0x950 [ 61.093884] split_vma+0xc6/0x110 [ 61.094348] mprotect_fixup+0x8d2/0xb30 [ 61.094883] do_mprotect_pkey+0x87e/0xd40 [ 61.095449] __x64_sys_mprotect+0x78/0xc0 [ 61.096004] do_syscall_64+0x3f/0x90 [ 61.096505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.097183] [ 61.097411] Freed by task 210: [ 61.097836] kasan_save_stack+0x22/0x50 [ 61.098376] kasan_set_track+0x25/0x30 [ 61.098903] kasan_save_free_info+0x2b/0x50 [ 61.099488] __kasan_slab_free+0x10a/0x190 [ 61.100057] kmem_cache_free+0x10d/0x4d0 [ 61.100601] rcu_core+0x8c8/0x2860 [ 61.101074] __do_softirq+0x1b7/0x7d4 [ 61.101582] [ 61.101813] Last potentially related work creation: [ 61.102434] kasan_save_stack+0x22/0x50 [ 61.102980] __kasan_record_aux_stack+0x8e/0xa0 [ 61.103590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.104280] remove_vma+0x139/0x170 [ 61.104762] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.105363] do_vmi_munmap+0x1f1/0x2b0 [ 61.105884] __vm_munmap+0x138/0x3a0 [ 61.106387] __x64_sys_munmap+0x59/0x80 [ 61.106916] do_syscall_64+0x3f/0x90 [ 61.107440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.108126] [ 61.108359] The buggy address belongs to the object at ffff88800e496740 [ 61.108359] which belongs to the cache vm_area_struct of size 168 [ 61.109939] The buggy address is located 88 bytes inside of [ 61.109939] freed 168-byte region [ffff88800e496740, ffff88800e4967e8) [ 61.111441] [ 61.111669] The buggy address belongs to the physical page: [ 61.112371] page:00000000bbc012da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe496 [ 61.113525] memcg:ffff88800e9d0f01 [ 61.113977] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.114661] page_type: 0xffffffff() [ 61.115151] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.116141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d0f01 [ 61.117119] page dumped because: kasan: bad access detected [ 61.117834] [ 61.118062] Memory state around the buggy address: [ 61.118688] ffff88800e496680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.119615] ffff88800e496700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.120535] >ffff88800e496780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.121449] ^ [ 61.121980] ffff88800e496800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.122887] ffff88800e496880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.123812] ================================================================== [ 61.125109] Disabling lock debugging due to kernel taint [ 63.143194] BUG: Bad rss-counter state mm:00000000d2160711 type:MM_FILEPAGES val:33 [ 63.144508] BUG: Bad rss-counter state mm:00000000d2160711 type:MM_ANONPAGES val:22 [ 63.658459] BUG: Bad rss-counter state mm:00000000bf3949bc type:MM_FILEPAGES val:33 [ 63.659643] BUG: Bad rss-counter state mm:00000000bf3949bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52231' (ECDSA) to the list of known hosts. 2023/06/19 20:39:34 fuzzer started 2023/06/19 20:39:34 dialing manager at localhost:44161 2023/06/19 20:39:34 checking machine... 2023/06/19 20:39:34 checking revisions... [ 64.284287] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:39:34 testing simple program... [ 64.331314] cgroup: Unknown subsys name 'net' [ 64.371609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:39:33 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880147e0000 RCX=0000000080000000 RDX=ffff88800fabfdf0 RSI=ffffffff818ad799 RDI=00000000ffffff9c RBP=1ffff11001f57f83 RSP=ffff88800fabfc10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=00000000ffffff9c R13=ffff88800fabfdf0 R14=dffffc0000000000 R15=dffffc0000000000 RIP=ffffffff814c07f1 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 00007f2490e2f900 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=00007f24913e70b0 CR3=000000000ed1e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fb6762ed370 CR3=000000000f5e6000 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=4403716c1762a280904e163c479af573 XMM02=000000000011fdc0eff9b2d0a8fce9cb XMM03=000000000011fe902c67c8bc2e329bc3 XMM04=8014656e07a8de8100000000000ae988 XMM05=19e9129bd510f2350000000000134080 XMM06=523ae2e1e1cb55b00000000000132ee8 XMM07=e042d86d42eb936e0000000000124778 XMM08=5d8b88d55374e8bd000000000011fe90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000