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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d7fa1af5b33e Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1757300c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=89c13de706fbf07a dashboard link: https://syzkaller.appspot.com/bug?extid=3b220254df55d8ca8a61 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150f7ed4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13745970580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/da97ad659b2c/disk-d7fa1af5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/659e123552a8/vmlinux-d7fa1af5.xz kernel image: https://storage.googleapis.com/syzbot-assets/6ec5dbf4643e/Image-d7fa1af5.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3b220254df55d8ca8a61@syzkaller.appspotmail.com head: 05ffc00000000309 fffffdffc6628001 0080000000000000 0000000100000000 head: ffffffff00000000 0000000000000024 00000000ffffffff 0000000000000200 page dumped because: VM_BUG_ON_FOLIO(!pvmw.pte) ------------[ cut here ]------------ kernel BUG at mm/rmap.c:1955! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 9503 Comm: syz-executor315 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : try_to_unmap_one+0x2c54/0x2d40 mm/rmap.c:1955 lr : try_to_unmap_one+0x2c54/0x2d40 mm/rmap.c:1955 sp : ffff80009e906380 x29: ffff80009e9065e0 x28: 0000000000000038 x27: ffff0000c9dbee80 x26: fffffdffc6628018 x25: fffffdffc6628030 x24: dfff800000000000 x23: ffff0000d84efdc0 x22: ffff0000d84efde0 x21: 0000000000000001 x20: fffffdffc6628000 x19: 05ffc00000020849 x18: 00000000ffffffff x17: 0000000000000000 x16: ffff80008adbe9e4 x15: 0000000000000001 x14: 1fffe0003386f2e2 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60003386f2e3 x10: 0000000000ff0100 x9 : 664e624a89365e00 x8 : 664e624a89365e00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80009e905a98 x4 : ffff80008f415ba0 x3 : ffff8000807b4b68 x2 : 0000000000000001 x1 : 0000000100000001 x0 : 000000000000002f Call trace: try_to_unmap_one+0x2c54/0x2d40 mm/rmap.c:1955 (P) rmap_walk_anon+0x47c/0x640 mm/rmap.c:2834 rmap_walk+0x128/0x1e8 mm/rmap.c:2939 try_to_unmap+0xc4/0x120 mm/rmap.c:2263 unmap_poisoned_folio+0x278/0x4a4 mm/memory-failure.c:1610 shrink_folio_list+0x608/0x4410 mm/vmscan.c:1131 reclaim_folio_list+0xdc/0x5d0 mm/vmscan.c:2217 reclaim_pages+0x420/0x544 mm/vmscan.c:2254 madvise_cold_or_pageout_pte_range+0x1d38/0x20d4 mm/madvise.c:434 walk_pmd_range mm/pagewalk.c:130 [inline] walk_pud_range mm/pagewalk.c:226 [inline] walk_p4d_range mm/pagewalk.c:264 [inline] walk_pgd_range+0xb4c/0x16bc mm/pagewalk.c:305 __walk_page_range+0x13c/0x654 mm/pagewalk.c:412 walk_page_range_mm+0x4fc/0x7dc mm/pagewalk.c:505 walk_page_range+0x80/0x98 mm/pagewalk.c:584 madvise_pageout_page_range mm/madvise.c:617 [inline] madvise_pageout mm/madvise.c:644 [inline] madvise_vma_behavior mm/madvise.c:1269 [inline] madvise_walk_vmas mm/madvise.c:1530 [inline] madvise_do_behavior+0x1940/0x2908 mm/madvise.c:1695 do_madvise mm/madvise.c:1782 [inline] __do_sys_madvise mm/madvise.c:1790 [inline] __se_sys_madvise mm/madvise.c:1788 [inline] __arm64_sys_madvise+0x10c/0x154 mm/madvise.c:1788 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: f9404be0 b0051fc1 910c8021 97fdefe4 (d4210000) ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup