syzkaller login: [ 33.765588] BUG: Bad rss-counter state mm:00000000c7f2c0d5 type:MM_FILEPAGES val:33 [ 33.766646] BUG: Bad rss-counter state mm:00000000c7f2c0d5 type:MM_ANONPAGES val:22 [ 33.945886] ================================================================== [ 33.946885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.947943] Read of size 8 at addr ffff88800e9bba50 by task sshd/220 [ 33.948863] [ 33.949101] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.950018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.951104] Call Trace: [ 33.951447] [ 33.951758] dump_stack_lvl+0x91/0xf0 [ 33.952281] print_report+0xcc/0x620 [ 33.952812] ? __virt_addr_valid+0x102/0x340 [ 33.953400] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.954063] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.954735] kasan_report+0xbe/0xf0 [ 33.955247] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.955913] vma_interval_tree_remove+0xc75/0xec0 [ 33.956566] vma_prepare+0xc54/0x11a0 [ 33.957081] __split_vma+0x5af/0x950 [ 33.957580] ? __pfx___split_vma+0x10/0x10 [ 33.958147] ? find_held_lock+0x2c/0x110 [ 33.958715] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.959325] ? lock_is_held_type+0x9f/0x120 [ 33.959904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.960558] ? mtree_range_walk+0x632/0x900 [ 33.961154] ? mas_walk+0x5c7/0x7c0 [ 33.961664] do_vmi_munmap+0x1f1/0x2b0 [ 33.962212] mmap_region+0x1f9/0x2660 [ 33.962735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.963285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.964053] ? __pfx_lock_acquire+0x10/0x10 [ 33.964630] ? __pfx_mmap_region+0x10/0x10 [ 33.965198] ? security_mmap_addr+0x7d/0xa0 [ 33.965772] ? get_unmapped_area+0x1f5/0x3f0 [ 33.966369] do_mmap+0x854/0xf00 [ 33.966842] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.967378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.967980] ksys_mmap_pgoff+0x3af/0x500 [ 33.968524] do_syscall_64+0x3f/0x90 [ 33.969038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.969728] RIP: 0033:0x7fd494193d82 [ 33.970223] 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 [ 33.972493] RSP: 002b:00007ffeda3d2de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.973458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd494193d82 [ 33.974378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4935cd000 [ 33.975284] RBP: 00007fd4935cd000 R08: 0000000000000009 R09: 0000000000001000 [ 33.976182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a1f343ec0 [ 33.977092] R13: 00007ffeda3d2e00 R14: 00007ffeda3d2e30 R15: 00007ffeda3d3190 [ 33.978009] [ 33.978324] [ 33.978560] Allocated by task 213: [ 33.979021] kasan_save_stack+0x22/0x50 [ 33.979571] kasan_set_track+0x25/0x30 [ 33.980095] __kasan_slab_alloc+0x59/0x70 [ 33.980666] kmem_cache_alloc+0x16b/0x370 [ 33.981213] vm_area_dup+0x20/0x160 [ 33.981692] __split_vma+0x170/0x950 [ 33.982201] split_vma+0xc6/0x110 [ 33.982684] mprotect_fixup+0x8d2/0xb30 [ 33.983221] do_mprotect_pkey+0x87e/0xd40 [ 33.983777] __x64_sys_mprotect+0x78/0xc0 [ 33.984328] do_syscall_64+0x3f/0x90 [ 33.984831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.985518] [ 33.985755] Freed by task 213: [ 33.986172] kasan_save_stack+0x22/0x50 [ 33.986718] kasan_set_track+0x25/0x30 [ 33.987245] kasan_save_free_info+0x2b/0x50 [ 33.987810] __kasan_slab_free+0x10a/0x190 [ 33.988385] kmem_cache_free+0x10d/0x4d0 [ 33.988926] rcu_core+0x8c8/0x2860 [ 33.989398] __do_softirq+0x1b7/0x7d4 [ 33.989907] [ 33.990139] Last potentially related work creation: [ 33.990777] kasan_save_stack+0x22/0x50 [ 33.991314] __kasan_record_aux_stack+0x8e/0xa0 [ 33.991928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.992618] remove_vma+0x139/0x170 [ 33.993106] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.993706] do_vmi_munmap+0x1f1/0x2b0 [ 33.994239] __vm_munmap+0x138/0x3a0 [ 33.994742] __x64_sys_munmap+0x59/0x80 [ 33.995266] do_syscall_64+0x3f/0x90 [ 33.995766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.996450] [ 33.996681] Second to last potentially related work creation: [ 33.997405] kasan_save_stack+0x22/0x50 [ 33.997944] __kasan_record_aux_stack+0x8e/0xa0 [ 33.998569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.999247] remove_vma+0x139/0x170 [ 33.999728] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.000322] do_vmi_munmap+0x1f1/0x2b0 [ 34.000840] mmap_region+0x1f9/0x2660 [ 34.001351] do_mmap+0x854/0xf00 [ 34.001816] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.002347] ksys_mmap_pgoff+0x3af/0x500 [ 34.002883] do_syscall_64+0x3f/0x90 [ 34.003383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.004069] [ 34.004298] The buggy address belongs to the object at ffff88800e9bb9f8 [ 34.004298] which belongs to the cache vm_area_struct of size 168 [ 34.005867] The buggy address is located 88 bytes inside of [ 34.005867] freed 168-byte region [ffff88800e9bb9f8, ffff88800e9bbaa0) [ 34.007388] [ 34.007621] The buggy address belongs to the physical page: [ 34.008329] page:00000000775611f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9bb [ 34.009481] memcg:ffff88800e015101 [ 34.009944] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.010643] page_type: 0xffffffff() [ 34.011124] raw: 0100000000000200 ffff88800879fc80 ffffea00003954c0 dead000000000006 [ 34.012107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e015101 [ 34.013077] page dumped because: kasan: bad access detected [ 34.013784] [ 34.014018] Memory state around the buggy address: [ 34.014673] ffff88800e9bb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.015602] ffff88800e9bb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.016511] >ffff88800e9bba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.017435] ^ [ 34.018193] ffff88800e9bba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.019120] ffff88800e9bbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.020044] ================================================================== [ 34.021429] Disabling lock debugging due to kernel taint [ 36.316046] BUG: Bad rss-counter state mm:000000007fdb991e type:MM_FILEPAGES val:33 [ 36.317101] BUG: Bad rss-counter state mm:000000007fdb991e type:MM_ANONPAGES val:22 [ 36.827632] BUG: Bad rss-counter state mm:0000000031b0d95f type:MM_FILEPAGES val:33 [ 36.828858] BUG: Bad rss-counter state mm:0000000031b0d95f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65040' (ECDSA) to the list of known hosts. 2023/06/19 15:09:55 fuzzer started 2023/06/19 15:09:56 dialing manager at localhost:44161 2023/06/19 15:09:56 checking machine... 2023/06/19 15:09:56 checking revisions... [ 37.563825] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:09:56 testing simple program... [ 37.617003] cgroup: Unknown subsys name 'net' [ 37.662290] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:09:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdfb415708 CR3=000000000dc28000 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=2035353a39303a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39303a3531203931 XMM08=3d656e696c646d632022656369767265 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=00007f588973cb10 CR3=000000000cb10000 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=1a530d57465230bcf348055276e444c8 XMM02=000000000011d1c8eff9b2d0a8fce9cb XMM03=000000000011d2982c67c8bc2e329bc3 XMM04=2810f2aa320b548100000000000ae988 XMM05=19e9129bd510f2350000000000135688 XMM06=4fda316b135da52b0000000000135510 XMM07=e042d86d42eb936e0000000000124a50 XMM08=f3110c487c9807be000000000011d298 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000