[ 26.698857] BUG: Bad rss-counter state mm:0000000016c89ce5 type:MM_FILEPAGES val:33 [ 26.700255] BUG: Bad rss-counter state mm:0000000016c89ce5 type:MM_ANONPAGES val:22 [ 26.771185] ================================================================== [ 26.772103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.773035] Read of size 8 at addr ffff88800da95df0 by task sshd/218 [ 26.773981] [ 26.774218] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.775133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.776169] Call Trace: [ 26.776503] [ 26.776808] dump_stack_lvl+0x91/0xf0 [ 26.777326] print_report+0xcc/0x620 [ 26.777860] ? __virt_addr_valid+0x102/0x340 [ 26.778456] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.779112] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.779749] kasan_report+0xbe/0xf0 [ 26.780247] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.780924] vma_interval_tree_remove+0xc75/0xec0 [ 26.781571] vma_prepare+0xc54/0x11a0 [ 26.782082] __split_vma+0x5af/0x950 [ 26.782586] ? __pfx___split_vma+0x10/0x10 [ 26.783144] ? find_held_lock+0x2c/0x110 [ 26.783690] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.784277] ? lock_is_held_type+0x9f/0x120 [ 26.784835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.785485] ? mtree_range_walk+0x632/0x900 [ 26.786067] ? mas_walk+0x5c7/0x7c0 [ 26.786564] do_vmi_munmap+0x1f1/0x2b0 [ 26.787079] mmap_region+0x1f9/0x2660 [ 26.787588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.788127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.788873] ? __pfx_lock_acquire+0x10/0x10 [ 26.789456] ? __pfx_mmap_region+0x10/0x10 [ 26.790013] ? security_mmap_addr+0x7d/0xa0 [ 26.790570] ? get_unmapped_area+0x1f5/0x3f0 [ 26.791148] do_mmap+0x854/0xf00 [ 26.791620] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.792140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.792734] ksys_mmap_pgoff+0x3af/0x500 [ 26.793263] do_syscall_64+0x3f/0x90 [ 26.793789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.794466] RIP: 0033:0x7ffa859c1d82 [ 26.794941] 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 [ 26.797154] RSP: 002b:00007ffd5ba09cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.798119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa859c1d82 [ 26.799010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa84dfb000 [ 26.799890] RBP: 00007ffa84dfb000 R08: 0000000000000009 R09: 0000000000001000 [ 26.800772] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf77805b20 [ 26.801681] R13: 00007ffd5ba09ce0 R14: 00007ffd5ba09d10 R15: 00007ffd5ba0a070 [ 26.802585] [ 26.802893] [ 26.803120] Allocated by task 211: [ 26.803576] kasan_save_stack+0x22/0x50 [ 26.804103] kasan_set_track+0x25/0x30 [ 26.804621] __kasan_slab_alloc+0x59/0x70 [ 26.805172] kmem_cache_alloc+0x16b/0x370 [ 26.805725] vm_area_dup+0x20/0x160 [ 26.806202] __split_vma+0x170/0x950 [ 26.806684] split_vma+0xc6/0x110 [ 26.807139] mprotect_fixup+0x8d2/0xb30 [ 26.807670] do_mprotect_pkey+0x87e/0xd40 [ 26.808220] __x64_sys_mprotect+0x78/0xc0 [ 26.808765] do_syscall_64+0x3f/0x90 [ 26.809264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.809959] [ 26.810189] Freed by task 211: [ 26.810596] kasan_save_stack+0x22/0x50 [ 26.811122] kasan_set_track+0x25/0x30 [ 26.811646] kasan_save_free_info+0x2b/0x50 [ 26.812203] __kasan_slab_free+0x10a/0x190 [ 26.812763] kmem_cache_free+0x10d/0x4d0 [ 26.813309] rcu_core+0x8c8/0x2860 [ 26.813788] __do_softirq+0x1b7/0x7d4 [ 26.814291] [ 26.814516] Last potentially related work creation: [ 26.815176] kasan_save_stack+0x22/0x50 [ 26.815706] __kasan_record_aux_stack+0x8e/0xa0 [ 26.816311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.816985] remove_vma+0x139/0x170 [ 26.817488] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.818085] do_vmi_munmap+0x1f1/0x2b0 [ 26.818594] __vm_munmap+0x138/0x3a0 [ 26.819085] __x64_sys_munmap+0x59/0x80 [ 26.819610] do_syscall_64+0x3f/0x90 [ 26.820107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.820770] [ 26.820999] The buggy address belongs to the object at ffff88800da95d98 [ 26.820999] which belongs to the cache vm_area_struct of size 168 [ 26.822629] The buggy address is located 88 bytes inside of [ 26.822629] freed 168-byte region [ffff88800da95d98, ffff88800da95e40) [ 26.824171] [ 26.824412] The buggy address belongs to the physical page: [ 26.825142] page:00000000e58e94c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda95 [ 26.826365] memcg:ffff88800e07e401 [ 26.826838] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.827553] page_type: 0xffffffff() [ 26.828053] raw: 0100000000000200 ffff88800879fc80 ffffea0000334640 dead000000000002 [ 26.829075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e07e401 [ 26.830047] page dumped because: kasan: bad access detected [ 26.830751] [ 26.830977] Memory state around the buggy address: [ 26.831589] ffff88800da95c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 26.832494] ffff88800da95d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 26.833400] >ffff88800da95d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.834316] ^ [ 26.835173] ffff88800da95e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.836080] ffff88800da95e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.836978] ================================================================== [ 26.837941] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.662736] BUG: Bad rss-counter state mm:00000000c47e0d80 type:MM_FILEPAGES val:33 [ 28.663356] BUG: Bad rss-counter state mm:00000000c47e0d80 type:MM_ANONPAGES val:22 [ 29.155618] BUG: Bad rss-counter state mm:00000000cdaec428 type:MM_FILEPAGES val:33 [ 29.157142] BUG: Bad rss-counter state mm:00000000cdaec428 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49615' (ECDSA) to the list of known hosts. 2023/06/20 10:24:23 fuzzer started 2023/06/20 10:24:23 dialing manager at localhost:44161 2023/06/20 10:24:23 checking machine... 2023/06/20 10:24:23 checking revisions... [ 29.798229] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:24:23 testing simple program... [ 29.860424] cgroup: Unknown subsys name 'net' [ 29.926633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81865431 RDX=0000000000008654 RSI=0000000000008654 RDI=ffffffff86509510 RBP=ffff8880159a7788 RSP=ffff8880159a76c0 R8 =0000000000000000 R9 =ffff8880159a7770 R10=0000000000038001 R11=0000000000022709 R12=ffff8880159a7790 R13=ffff8880159a7778 R14=ffff8880159a7771 R15=ffff8880159a7730 RIP=ffffffff8113077a 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 00007fd70bfff700 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=00007f79cd555650 CR3=000000000c67a000 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=2033323a34323a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100355ec39 RBX=ffff88801aaf6198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801aaf61c8 RBP=ffff888019f850e8 RSP=ffff88806cf09da8 R8 =0000000000000001 R9 =ffffed100d9e13a9 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019f91780 R14=ffffffff811f7e84 R15=ffff888016570d80 RIP=ffffffff81846362 RFL=00000046 [---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 00007faa650fe900 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=00007faa6457c380 CR3=000000000f68e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b86b2f48763f8b1600000000000ae988 XMM05=c65e22f0dea875f00000000000134ba0 XMM06=751b9502027dc0b900000000001336c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000