syzkaller login: [ 29.859059] BUG: Bad rss-counter state mm:00000000674f89d1 type:MM_FILEPAGES val:33 [ 29.860354] BUG: Bad rss-counter state mm:00000000674f89d1 type:MM_ANONPAGES val:22 [ 30.022076] ================================================================== [ 30.023191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.024319] Read of size 8 at addr ffff88800eea7df0 by task sshd/221 [ 30.025303] [ 30.025536] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.026414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.027407] Call Trace: [ 30.027733] [ 30.028019] dump_stack_lvl+0x91/0xf0 [ 30.028514] print_report+0xcc/0x620 [ 30.028998] ? __virt_addr_valid+0x102/0x340 [ 30.029571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.030204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.030828] kasan_report+0xbe/0xf0 [ 30.031306] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.031937] vma_interval_tree_remove+0xc75/0xec0 [ 30.032543] vma_prepare+0xc54/0x11a0 [ 30.033038] __split_vma+0x5af/0x950 [ 30.033515] ? __pfx___split_vma+0x10/0x10 [ 30.034082] ? find_held_lock+0x2c/0x110 [ 30.034633] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.035218] ? lock_is_held_type+0x9f/0x120 [ 30.035767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.036395] ? mtree_range_walk+0x632/0x900 [ 30.036975] ? mas_walk+0x5c7/0x7c0 [ 30.037464] do_vmi_munmap+0x1f1/0x2b0 [ 30.037972] mmap_region+0x1f9/0x2660 [ 30.038472] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.038999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.039736] ? __pfx_lock_acquire+0x10/0x10 [ 30.040279] ? __pfx_mmap_region+0x10/0x10 [ 30.040830] ? security_mmap_addr+0x7d/0xa0 [ 30.041372] ? get_unmapped_area+0x1f5/0x3f0 [ 30.041953] do_mmap+0x854/0xf00 [ 30.042411] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.042934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.043520] ksys_mmap_pgoff+0x3af/0x500 [ 30.044041] do_syscall_64+0x3f/0x90 [ 30.044529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.045193] RIP: 0033:0x7fa6df8dfd82 [ 30.045673] 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 [ 30.047847] RSP: 002b:00007ffc937f80d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.048781] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6df8dfd82 [ 30.049669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6ded19000 [ 30.050566] RBP: 00007fa6ded19000 R08: 0000000000000009 R09: 0000000000001000 [ 30.051431] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562634d2ec0 [ 30.052299] R13: 00007ffc937f80f0 R14: 00007ffc937f8120 R15: 00007ffc937f8480 [ 30.053166] [ 30.053468] [ 30.053711] Allocated by task 214: [ 30.054161] kasan_save_stack+0x22/0x50 [ 30.054686] kasan_set_track+0x25/0x30 [ 30.055199] __kasan_slab_alloc+0x59/0x70 [ 30.055731] kmem_cache_alloc+0x16b/0x370 [ 30.056266] vm_area_dup+0x20/0x160 [ 30.056725] __split_vma+0x170/0x950 [ 30.057212] split_vma+0xc6/0x110 [ 30.057669] mprotect_fixup+0x8d2/0xb30 [ 30.058185] do_mprotect_pkey+0x87e/0xd40 [ 30.058711] __x64_sys_mprotect+0x78/0xc0 [ 30.059256] do_syscall_64+0x3f/0x90 [ 30.059740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.060400] [ 30.060626] Freed by task 214: [ 30.061038] kasan_save_stack+0x22/0x50 [ 30.061579] kasan_set_track+0x25/0x30 [ 30.062089] kasan_save_free_info+0x2b/0x50 [ 30.062635] __kasan_slab_free+0x10a/0x190 [ 30.063178] kmem_cache_free+0x10d/0x4d0 [ 30.063702] rcu_core+0x8c8/0x2860 [ 30.064151] __do_softirq+0x1b7/0x7d4 [ 30.064646] [ 30.064871] Last potentially related work creation: [ 30.065464] kasan_save_stack+0x22/0x50 [ 30.066005] __kasan_record_aux_stack+0x8e/0xa0 [ 30.066594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.067271] remove_vma+0x139/0x170 [ 30.067729] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.068300] do_vmi_munmap+0x1f1/0x2b0 [ 30.068795] __vm_munmap+0x138/0x3a0 [ 30.069285] __x64_sys_munmap+0x59/0x80 [ 30.069810] do_syscall_64+0x3f/0x90 [ 30.070295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.070967] [ 30.071189] The buggy address belongs to the object at ffff88800eea7d98 [ 30.071189] which belongs to the cache vm_area_struct of size 168 [ 30.072725] The buggy address is located 88 bytes inside of [ 30.072725] freed 168-byte region [ffff88800eea7d98, ffff88800eea7e40) [ 30.074181] [ 30.074397] The buggy address belongs to the physical page: [ 30.075079] page:00000000e7eccacf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea7 [ 30.076204] memcg:ffff888016f50b01 [ 30.076653] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.077324] page_type: 0xffffffff() [ 30.077798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.078746] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f50b01 [ 30.079682] page dumped because: kasan: bad access detected [ 30.080361] [ 30.080580] Memory state around the buggy address: [ 30.081170] ffff88800eea7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.082063] ffff88800eea7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.082947] >ffff88800eea7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.083830] ^ [ 30.084656] ffff88800eea7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.085549] ffff88800eea7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.086426] ================================================================== [ 30.087382] Disabling lock debugging due to kernel taint [ 32.216289] BUG: Bad rss-counter state mm:00000000b62ce080 type:MM_FILEPAGES val:33 [ 32.217529] BUG: Bad rss-counter state mm:00000000b62ce080 type:MM_ANONPAGES val:22 [ 32.678155] BUG: Bad rss-counter state mm:000000003b5c5922 type:MM_FILEPAGES val:33 [ 32.680072] BUG: Bad rss-counter state mm:000000003b5c5922 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50126' (ECDSA) to the list of known hosts. 2023/06/20 18:54:00 fuzzer started 2023/06/20 18:54:00 dialing manager at localhost:36067 2023/06/20 18:54:00 checking machine... 2023/06/20 18:54:00 checking revisions... [ 33.374377] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:00 testing simple program... [ 33.422543] cgroup: Unknown subsys name 'net' [ 33.478635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:00 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff8880159cb680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab18a9 RDI=ffff8880159cba74 RBP=ffff8880159cb680 RSP=ffff88800fd3f4f0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000005b R11=00000a4c00000a4c R12=0000000000000000 R13=000000000000005b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8135bdf9 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 00007f9e4a491900 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=00007f9e4aa48618 CR3=000000001a330000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f98cd74e040 CR3=000000000ca78000 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=446230db4d59d090354a1779b1a3b02a XMM02=2c67c8bc2e329bc3000000000011d9e0 XMM03=fb795ef6d65770560000000000121e78 XMM04=0081735d24587fca00000000000ae988 XMM05=f22f1e00b1541ae90000000000132d78 XMM06=c291bd5c70af25b90000000000131e18 XMM07=e042d86d42eb936e00000000001220f8 XMM08=09e3789c7d008db0000000000011da40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000