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AJvYcCV003WsI1vKH2MQAEe4h6PQSfR8fRurO8OfAUiZmbL2umE/GQjJwB8LnGodespCtnpNEdryzjrHwA==@kvack.org X-Gm-Message-State: AOJu0YyxUigu0weIG3JOJh4oRwFq3QT4go8kY2TuVadZOvSHJIoj69AI FZILVvfSUFM2cPZkXuwA7AxDCEXTlUGFMDyUCYulQsu7QcfoKHuR1drsZu/sDIeLXMWwHdipzWx G9z/3Xlzejg26S+7hww6wQYZ1reJjZq/x2XaXBrFbLb4VwQEqHCYL4Ig= X-Google-Smtp-Source: AGHT+IGhIfJiFkcZvl7410r5jh1+7KeAkt1DPscDK4CtvsWGBWv2373JLhxeq+6G72Jaw0Nt4GgF+7hXS6jEJvUgj/rAHnl+NSHk MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2192:b0:3d3:ddb3:fe4e with SMTP id e9e14a558f8ab-3d5ccdd7400mr46330615ab.13.1743092801411; Thu, 27 Mar 2025 09:26:41 -0700 (PDT) Date: Thu, 27 Mar 2025 09:26:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67e57c41.050a0220.2f068f.0033.GAE@google.com> Subject: [syzbot] [mm?] [fs?] BUG: sleeping function called from invalid context in folio_mc_copy From: syzbot To: brauner@kernel.org, hare@suse.de, joel.granados@kernel.org, john.g.garry@oracle.com, kees@kernel.org, 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version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1597d24c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=152d4de4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/61886896d33d/disk-3ba7dfb8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e41306171182/vmlinux-3ba7dfb8.xz kernel image: https://storage.googleapis.com/syzbot-assets/e056187afb19/bzImage-3ba7dfb8.xz The issue was bisected to: commit 3c20917120ce61f2a123ca0810293872f4c6b5a4 Author: Hannes Reinecke Date: Fri Feb 21 22:38:21 2025 +0000 block/bdev: enable large folio support for large logical block sizes bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1393643f980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1053643f980000 console output: https://syzkaller.appspot.com/x/log.txt?x=1793643f980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f3c6fda1297c748a7076@syzkaller.appspotmail.com Fixes: 3c20917120ce ("block/bdev: enable large folio support for large logical block sizes") BUG: sleeping function called from invalid context at mm/util.c:742 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7101, name: syz-executor140 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz-executor140/7101: #0: ffff888032c2e420 (sb_writers#3){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1157 #1: ffff888148ca65c8 (&mapping->i_private_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #1: ffff888148ca65c8 (&mapping->i_private_lock){+.+.}-{3:3}, at: __buffer_migrate_folio+0x241/0x5d0 mm/migrate.c:853 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 UID: 0 PID: 7101 Comm: syz-executor140 Not tainted 6.14.0-syzkaller-00685-g3ba7dfb8da62 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 __might_resched+0x5d4/0x780 kernel/sched/core.c:8764 folio_mc_copy+0x13c/0x1d0 mm/util.c:742 __migrate_folio mm/migrate.c:758 [inline] filemap_migrate_folio+0xb4/0x4c0 mm/migrate.c:943 __buffer_migrate_folio+0x3ec/0x5d0 mm/migrate.c:874 move_to_new_folio+0x2ac/0xc20 mm/migrate.c:1050 migrate_folio_move mm/migrate.c:1358 [inline] migrate_folios_move mm/migrate.c:1710 [inline] migrate_pages_batch+0x1e84/0x30b0 mm/migrate.c:1957 migrate_pages_sync mm/migrate.c:1987 [inline] migrate_pages+0x2007/0x3680 mm/migrate.c:2096 compact_zone+0x33d5/0x4ae0 mm/compaction.c:2663 compact_node mm/compaction.c:2932 [inline] compact_nodes mm/compaction.c:2954 [inline] sysctl_compaction_handler+0x496/0x990 mm/compaction.c:3005 proc_sys_call_handler+0x5f3/0x950 fs/proc/proc_sysctl.c:601 iter_file_splice_write+0xbce/0x1510 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1158 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1227 do_sendfile+0x564/0x8a0 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1423 [inline] __se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f615c6e5599 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f615c67f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f615c76f358 RCX: 00007f615c6e5599 RDX: 00002000000000c0 RSI: 0000000000000006 RDI: 0000000000000007 RBP: 00007f615c76f350 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000009 R11: 0000000000000246 R12: 00007f615c73c074 R13: 0000200000000080 R14: 0000200000000040 R15: 00002000000000c0 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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