[ 24.206882] BUG: Bad rss-counter state mm:0000000052dd0413 type:MM_FILEPAGES val:33 [ 24.207678] BUG: Bad rss-counter state mm:0000000052dd0413 type:MM_ANONPAGES val:22 [ 24.350556] ================================================================== [ 24.351432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.352318] Read of size 8 at addr ffff88801bc2b310 by task sshd/220 [ 24.353140] [ 24.353349] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.354150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.355063] Call Trace: [ 24.355379] [ 24.355679] dump_stack_lvl+0x91/0xf0 [ 24.356146] print_report+0xcc/0x620 [ 24.356608] ? __virt_addr_valid+0x102/0x340 [ 24.357135] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.357713] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.358289] kasan_report+0xbe/0xf0 [ 24.358743] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.359331] vma_interval_tree_remove+0xc75/0xec0 [ 24.359932] vma_prepare+0xc54/0x11a0 [ 24.360384] __split_vma+0x5af/0x950 [ 24.360832] ? __pfx___split_vma+0x10/0x10 [ 24.361328] ? find_held_lock+0x2c/0x110 [ 24.361819] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.362347] ? lock_is_held_type+0x9f/0x120 [ 24.362854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.363436] ? mtree_range_walk+0x632/0x900 [ 24.363972] ? mas_walk+0x5c7/0x7c0 [ 24.364419] do_vmi_munmap+0x1f1/0x2b0 [ 24.364883] mmap_region+0x1f9/0x2660 [ 24.365336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.365823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.366490] ? __pfx_lock_acquire+0x10/0x10 [ 24.366989] ? __pfx_mmap_region+0x10/0x10 [ 24.367496] ? security_mmap_addr+0x7d/0xa0 [ 24.368010] ? get_unmapped_area+0x1f5/0x3f0 [ 24.368560] do_mmap+0x854/0xf00 [ 24.368985] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.369463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.370026] ksys_mmap_pgoff+0x3af/0x500 [ 24.370551] do_syscall_64+0x3f/0x90 [ 24.371060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.371742] RIP: 0033:0x7fe5bbc11d82 [ 24.372202] 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 [ 24.374355] RSP: 002b:00007ffdd488ec78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.375292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5bbc11d82 [ 24.376192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5bb04b000 [ 24.377052] RBP: 00007fe5bb04b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.377903] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579957e5f70 [ 24.378771] R13: 00007ffdd488ec90 R14: 00007ffdd488ecc0 R15: 00007ffdd488f020 [ 24.379678] [ 24.379976] [ 24.380193] Allocated by task 209: [ 24.380622] kasan_save_stack+0x22/0x50 [ 24.381138] kasan_set_track+0x25/0x30 [ 24.381641] __kasan_slab_alloc+0x59/0x70 [ 24.382165] kmem_cache_alloc+0x16b/0x370 [ 24.382685] vm_area_dup+0x20/0x160 [ 24.383144] __split_vma+0x170/0x950 [ 24.383624] split_vma+0xc6/0x110 [ 24.384067] mprotect_fixup+0x8d2/0xb30 [ 24.384592] do_mprotect_pkey+0x87e/0xd40 [ 24.385140] __x64_sys_mprotect+0x78/0xc0 [ 24.385679] do_syscall_64+0x3f/0x90 [ 24.386153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.386806] [ 24.387027] Freed by task 19: [ 24.387431] kasan_save_stack+0x22/0x50 [ 24.387943] kasan_set_track+0x25/0x30 [ 24.388433] kasan_save_free_info+0x2b/0x50 [ 24.388963] __kasan_slab_free+0x10a/0x190 [ 24.389491] kmem_cache_free+0x10d/0x4d0 [ 24.390000] rcu_core+0x8c8/0x2860 [ 24.390442] __do_softirq+0x1b7/0x7d4 [ 24.390926] [ 24.391150] Last potentially related work creation: [ 24.391769] kasan_save_stack+0x22/0x50 [ 24.392279] __kasan_record_aux_stack+0x8e/0xa0 [ 24.392849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.393498] remove_vma+0x139/0x170 [ 24.393959] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.394538] do_vmi_munmap+0x1f1/0x2b0 [ 24.395038] __vm_munmap+0x138/0x3a0 [ 24.395517] __x64_sys_munmap+0x59/0x80 [ 24.396026] do_syscall_64+0x3f/0x90 [ 24.396502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.397146] [ 24.397367] The buggy address belongs to the object at ffff88801bc2b2b8 [ 24.397367] which belongs to the cache vm_area_struct of size 168 [ 24.398875] The buggy address is located 88 bytes inside of [ 24.398875] freed 168-byte region [ffff88801bc2b2b8, ffff88801bc2b360) [ 24.400297] [ 24.400514] The buggy address belongs to the physical page: [ 24.401175] page:000000003fb8b18c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2b [ 24.402279] memcg:ffff88801bc26101 [ 24.402707] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.403361] page_type: 0xffffffff() [ 24.403823] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.404738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc26101 [ 24.405648] page dumped because: kasan: bad access detected [ 24.406324] [ 24.406540] Memory state around the buggy address: [ 24.407123] ffff88801bc2b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.407997] ffff88801bc2b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.408847] >ffff88801bc2b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.409751] ^ [ 24.410219] ffff88801bc2b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.411088] ffff88801bc2b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.411950] ================================================================== [ 24.412963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.091700] BUG: Bad rss-counter state mm:000000009b66a01f type:MM_FILEPAGES val:33 [ 26.092304] BUG: Bad rss-counter state mm:000000009b66a01f type:MM_ANONPAGES val:22 [ 26.538711] BUG: Bad rss-counter state mm:00000000710ab312 type:MM_FILEPAGES val:33 [ 26.540075] BUG: Bad rss-counter state mm:00000000710ab312 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62801' (ECDSA) to the list of known hosts. 2023/06/20 13:00:58 fuzzer started 2023/06/20 13:00:58 dialing manager at localhost:36067 2023/06/20 13:00:58 checking machine... 2023/06/20 13:00:58 checking revisions... [ 27.192366] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:59 testing simple program... [ 27.247091] cgroup: Unknown subsys name 'net' [ 27.307785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:58 Registers: info registers vcpu 0 RAX=ffff88800dd24848 RBX=ffff888014645340 RCX=000000000000000b RDX=0000000000003cc0 RSI=ffff88800dd24800 RDI=ffff88800844fc80 RBP=ffff888016b57d48 RSP=ffff888016b57d20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800844fc80 R13=ffffea0000519000 R14=ffffffff81234440 R15=ffff88800ef8ea00 RIP=ffffffff81809df3 RFL=00000216 [----AP-] 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 00007f4a98705900 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=00007fffd0e53368 CR3=000000000c564000 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=00007f25853985100000563f964c0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801474fc48 RCX=0000000000000000 RDX=ffff888014750000 RSI=ffffffff818a0204 RDI=ffffffff85d3d350 RBP=ffff88801474f9d0 RSP=ffff88801474f8d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888018cb8d38 R13=fffffffffffffffe R14=0000000000000011 R15=ffff888008c159a0 RIP=ffffffff814c089b 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 00007feaaca18900 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=00007feaabe91570 CR3=000000000c804000 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=6871d7f22fb4fda200000000000ae988 XMM05=ee7c9810c1f33fd10000000000132728 XMM06=1d2ce9de6f92b65f0000000000131158 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000