[ 24.529321] BUG: Bad rss-counter state mm:00000000de49b164 type:MM_FILEPAGES val:33 [ 24.530789] BUG: Bad rss-counter state mm:00000000de49b164 type:MM_ANONPAGES val:22 [ 24.577594] ================================================================== [ 24.578891] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.580118] Read of size 8 at addr ffff88801b972058 by task sshd/219 [ 24.581102] [ 24.581406] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.582458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.583657] Call Trace: [ 24.584034] [ 24.584313] dump_stack_lvl+0x91/0xf0 [ 24.584779] print_report+0xcc/0x620 [ 24.585249] ? __virt_addr_valid+0x102/0x340 [ 24.585768] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.586342] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.586919] kasan_report+0xbe/0xf0 [ 24.587383] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.587989] vma_interval_tree_remove+0xc75/0xec0 [ 24.588571] vma_prepare+0xc54/0x11a0 [ 24.589035] __split_vma+0x5af/0x950 [ 24.589538] ? __pfx___split_vma+0x10/0x10 [ 24.590046] ? find_held_lock+0x2c/0x110 [ 24.590536] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.591073] ? lock_is_held_type+0x9f/0x120 [ 24.591582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.592162] ? mtree_range_walk+0x632/0x900 [ 24.592711] ? mas_walk+0x5c7/0x7c0 [ 24.593195] do_vmi_munmap+0x1f1/0x2b0 [ 24.593691] mmap_region+0x1f9/0x2660 [ 24.594162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.594660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.595354] ? __pfx_lock_acquire+0x10/0x10 [ 24.595879] ? __pfx_mmap_region+0x10/0x10 [ 24.596396] ? security_mmap_addr+0x7d/0xa0 [ 24.596907] ? get_unmapped_area+0x1f5/0x3f0 [ 24.597485] do_mmap+0x854/0xf00 [ 24.597914] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.598397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.598944] ksys_mmap_pgoff+0x3af/0x500 [ 24.599436] do_syscall_64+0x3f/0x90 [ 24.599900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.600526] RIP: 0033:0x7ff16f83dd82 [ 24.600986] 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 [ 24.603115] RSP: 002b:00007ffda0013fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.603983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff16f83dd82 [ 24.604787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff16ec77000 [ 24.605612] RBP: 00007ff16ec77000 R08: 0000000000000009 R09: 0000000000001000 [ 24.606422] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646506f4ec0 [ 24.607263] R13: 00007ffda0013fc0 R14: 00007ffda0013ff0 R15: 00007ffda0014350 [ 24.608112] [ 24.608402] [ 24.608614] Allocated by task 210: [ 24.609037] kasan_save_stack+0x22/0x50 [ 24.609579] kasan_set_track+0x25/0x30 [ 24.610058] __kasan_slab_alloc+0x59/0x70 [ 24.610570] kmem_cache_alloc+0x16b/0x370 [ 24.611071] vm_area_dup+0x20/0x160 [ 24.611515] __split_vma+0x170/0x950 [ 24.611981] split_vma+0xc6/0x110 [ 24.612410] mprotect_fixup+0x8d2/0xb30 [ 24.612895] do_mprotect_pkey+0x87e/0xd40 [ 24.613431] __x64_sys_mprotect+0x78/0xc0 [ 24.613941] do_syscall_64+0x3f/0x90 [ 24.614405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.615029] [ 24.615243] Freed by task 210: [ 24.615625] kasan_save_stack+0x22/0x50 [ 24.616110] kasan_set_track+0x25/0x30 [ 24.616587] kasan_save_free_info+0x2b/0x50 [ 24.617111] __kasan_slab_free+0x10a/0x190 [ 24.617684] kmem_cache_free+0x10d/0x4d0 [ 24.618180] rcu_core+0x8c8/0x2860 [ 24.618620] __do_softirq+0x1b7/0x7d4 [ 24.619092] [ 24.619303] Last potentially related work creation: [ 24.619873] kasan_save_stack+0x22/0x50 [ 24.620367] __kasan_record_aux_stack+0x8e/0xa0 [ 24.620921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.621580] remove_vma+0x139/0x170 [ 24.622016] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.622564] do_vmi_munmap+0x1f1/0x2b0 [ 24.623044] __vm_munmap+0x138/0x3a0 [ 24.623497] __x64_sys_munmap+0x59/0x80 [ 24.623980] do_syscall_64+0x3f/0x90 [ 24.624442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.625067] [ 24.625307] The buggy address belongs to the object at ffff88801b972000 [ 24.625307] which belongs to the cache vm_area_struct of size 168 [ 24.626754] The buggy address is located 88 bytes inside of [ 24.626754] freed 168-byte region [ffff88801b972000, ffff88801b9720a8) [ 24.628118] [ 24.628330] The buggy address belongs to the physical page: [ 24.628964] page:00000000f4defc57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b972 [ 24.630070] memcg:ffff88801b918901 [ 24.630490] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.631119] page_type: 0xffffffff() [ 24.631570] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.632462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b918901 [ 24.633364] page dumped because: kasan: bad access detected [ 24.634002] [ 24.634213] Memory state around the buggy address: [ 24.634772] ffff88801b971f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.635607] ffff88801b971f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.636442] >ffff88801b972000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.637314] ^ [ 24.638018] ffff88801b972080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.638845] ffff88801b972100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.639668] ================================================================== [ 24.640866] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.034394] BUG: Bad rss-counter state mm:00000000c35f80e9 type:MM_FILEPAGES val:33 [ 27.035479] BUG: Bad rss-counter state mm:00000000c35f80e9 type:MM_ANONPAGES val:22 [ 27.581938] BUG: Bad rss-counter state mm:00000000ce46903f type:MM_FILEPAGES val:33 [ 27.582988] BUG: Bad rss-counter state mm:00000000ce46903f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53955' (ECDSA) to the list of known hosts. 2023/06/20 18:22:16 fuzzer started 2023/06/20 18:22:16 dialing manager at localhost:36067 2023/06/20 18:22:16 checking machine... 2023/06/20 18:22:16 checking revisions... [ 28.232544] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:22:16 testing simple program... [ 28.289676] cgroup: Unknown subsys name 'net' [ 28.371135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:22:16 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=00007ffe1c56e5a0 RDX=00007f9e5b593440 RSI=00007ffe1c56e590 RDI=00007ffe1c56e7e0 RBP=0000000000000001 RSP=00007ffe1c56e3d0 R8 =0000000000000000 R9 =0000000000000010 R10=0000000000000002 R11=0000000000656434 R12=00007ffe1c56e7d0 R13=00007ffe1c56e7e0 R14=0000000000000000 R15=00007ffe1c56e590 RIP=00007f9e5b22178b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9e5aa19900 00000000 00000000 GS =0000 0000000000000000 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=00007f9e59e6da60 CR3=000000000c9c8000 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=7e8a42789393c4b7000000000011a060 XMM01=7e8a42789393c4b7000000000011a060 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8cf68f787a1226ce00000000000ae988 XMM05=53107e19013565dc0000000000132248 XMM06=19e9129bd510f2350000000000130d38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007ffe785d0888 CR3=000000000e672000 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=2036313a32323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a32323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000