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Fri, 01 Aug 2025 03:08:35 -0700 (PDT) Date: Fri, 01 Aug 2025 03:08:35 -0700 In-Reply-To: <688b8332.a00a0220.26d0e1.0044.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <688c9223.a00a0220.26d0e1.0068.GAE@google.com> Subject: Re: [syzbot] [mm?] WARNING in trace_suspend_resume From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, david@redhat.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, mhocko@suse.com, rppt@kernel.org, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Queue-Id: CAB0C140003 X-Rspamd-Server: rspam06 X-Stat-Signature: 9b5ifupti8hfgbs9bq33ab59qdsy9nct X-HE-Tag: 1754042916-888800 X-HE-Meta: U2FsdGVkX19/1BN7qqiNboWMLMsJR1rvDHTMrvBAE0AyQzJvcFsNMtnFRmfmm3OD9rCHrU3LJ9l3tWtKgraZcXUd7WUetiDGBcNmHnNMEofLwZHv71NvS2QMt22jSeaScEuwcUlR/xB6uSrwoIX/aBPnsaxcarG1SgfdSS0UnTDrD89njezCaPxzeHaQXI3xkEkBRnrAp6QbhtTszyv4D2yBOtrxY2tB7I+gx4Q1hls3rkDowo1QQIBJSQaYBmLMZ1WsKPsIqDtcNylDtT+WLSOS1QUadjcmyYXogVTn2XiYNy7Jleoz6VkfI67E61INR9mz1Ovf8CDqL0Ca0UlWC461wpbWHY+IjOjG+eOCMjzitlvK1eFruw2GePrLvjVH6cIfYT/fbC2Lq13fVhaB+TFcu/r+1dwFUJk4+gHEXcaHp3UeQli8oPwqA75pMAUj+PbJKfwdRHvQfPvuN94Fd43O7F4VRGt38ryC/41r8y2ate0UfLyvxUSndz9PdBQSHVCA4KDbYeXb1vdyTjxCQCxIMYHCG/qbq4A2+OvVv7lY7d+VPbb0PRAZtE1R39EKP+Xnjf4sth50NorL1vJmIuwEMxQ3kMSdLQSue6zEx5L8l5lnZ38tZUmT6+90kBQNtZuXnsHvG2AmwXFwoRQtBvUtO2V+SERUSkzMiI/znruWoTXRgwEyzoEeqdL6SdjQ4VJTZWYpHRxyC2hyHdJWeEMKuVPJAyG+qVa5Rxm86Mys01G2ikocsmHe9OSYvb1NSuxPIgvuv9dr1fuIuCvzj7lERgcWuOAle7I5ysBtzuplp0F8X02Ji6DrWL1wsbLzWeywbAMUgBB3QrQv3ACyWR8yPtZEK9R/UNUYAG0HBYRrpl3RDbZZNR9P5D8/EkojonDLDDVb+62Uijs/yVyZzY2NM7Ova0lL9LALU///ONWXhgR2InULfmgB0xQJWAARLvfPMu8xPoNM3Fyw/fP r4qx59xg 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 3rZ2HIj+ 1FxJDGipQQITNMjZscaFWD1v9tdXnT6T2wVZlj97LgQuc54AqFzD67B5lULpQuC7FjVk0/RkkWRvC7ZeRGu7dz06ucVylUttz5bU2mR5F0KFuJysXw5NtatV4/bjUR0jRcHDCEcBP03/gWJkMyrsW47hrCvqzWV40kZZYxeFc4tuBsko918ympcQ+D6hfW29GcudHg9enb8OHWMlsoUMRuCD9hQNp923lyLmkhwXO3JoptZqHhlfl1x9VzFS1tZ56bsjs+dpkyGJUA4UVNI/rG3Nw5ru4UT1+g5twIFT399jy2coOMVQQx4maVPFx62E/OO1nmYfQhfCsD9avAetnJb6tQ2VGXabNAiXX/XPbuloKD2AdWcjv1M+Yx974zzh X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has found a reproducer for the following issue on: HEAD commit: f2d282e1dfb3 Merge tag 'bitmap-for-6.17' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11709cf0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c686e0c98d241433 dashboard link: https://syzkaller.appspot.com/bug?extid=99d4fec338b62b703891 compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e0e2a2580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12a439bc580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/98a89b9f34e4/non_bootable_disk-f2d282e1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/25cab46afcee/vmlinux-f2d282e1.xz kernel image: https://storage.googleapis.com/syzbot-assets/77cd04442f1b/zImage-f2d282e1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+99d4fec338b62b703891@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4155 at mm/highmem.c:622 kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622 Modules linked in: Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 0 PID: 4155 Comm: syz.1.17 Not tainted 6.16.0-syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Call trace: [<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:8281f77c r5:00000000 r4:8224bc00 [<80201b08>] (show_stack) from [<8021fb00>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021fb00>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120) [<8021faac>] (dump_stack_lvl) from [<8021fb40>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000000 r4:82a76d18 [<8021fb28>] (dump_stack) from [<80202624>] (vpanic+0x10c/0x360 kernel/panic.c:440) [<80202518>] (vpanic) from [<802028ac>] (trace_suspend_resume+0x0/0xd8 kernel/panic.c:574) r7:804be014 [<80202878>] (panic) from [<802548c4>] (check_panic_on_warn kernel/panic.c:333 [inline]) [<80202878>] (panic) from [<802548c4>] (get_taint+0x0/0x1c kernel/panic.c:328) r3:8280c684 r2:00000001 r1:822326d8 r0:8223a0a0 [<80254850>] (check_panic_on_warn) from [<80254a28>] (__warn+0x80/0x188 kernel/panic.c:845) [<802549a8>] (__warn) from [<80254ca8>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:872) r8:00000009 r7:82266338 r6:df985d14 r5:840d5400 r4:00000000 [<80254b34>] (warn_slowpath_fmt) from [<804be014>] (kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622) r10:00000000 r9:ded86c30 r8:deb6caa4 r7:00a00000 r6:00000003 r5:840d5400 r4:ffefd000 [<804bde08>] (kunmap_local_indexed) from [<8053ace8>] (__kunmap_local include/linux/highmem-internal.h:102 [inline]) [<804bde08>] (kunmap_local_indexed) from [<8053ace8>] (move_pages_pte mm/userfaultfd.c:1457 [inline]) [<804bde08>] (kunmap_local_indexed) from [<8053ace8>] (move_pages+0xb1c/0x1a00 mm/userfaultfd.c:1860) r7:00a00000 r6:00000000 r5:8490d6ac r4:ffefb000 [<8053a1cc>] (move_pages) from [<805c401c>] (userfaultfd_move fs/userfaultfd.c:1923 [inline]) [<8053a1cc>] (move_pages) from [<805c401c>] (userfaultfd_ioctl+0x1254/0x2408 fs/userfaultfd.c:2046) r10:8425d6c0 r9:df985e98 r8:00000001 r7:21000000 r6:00000000 r5:20000040 r4:8486d000 [<805c2dc8>] (userfaultfd_ioctl) from [<8056c4d4>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<805c2dc8>] (userfaultfd_ioctl) from [<8056c4d4>] (do_vfs_ioctl fs/ioctl.c:552 [inline]) [<805c2dc8>] (userfaultfd_ioctl) from [<8056c4d4>] (__do_sys_ioctl fs/ioctl.c:596 [inline]) [<805c2dc8>] (userfaultfd_ioctl) from [<8056c4d4>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:584) r10:840d5400 r9:00000003 r8:8572d780 r7:20000040 r6:8572d780 r5:00000000 r4:c028aa05 [<8056c3a4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdf985fa8 to 0xdf985ff0) 5fa0: 00000000 00000000 00000003 c028aa05 20000040 00000000 5fc0: 00000000 00000000 002f6300 00000036 00000000 002f62d4 00000938 00000000 5fe0: 7eb28780 7eb28770 000193dc 001321f0 r10:00000036 r9:840d5400 r8:8020029c r7:00000036 r6:002f6300 r5:00000000 r4:00000000 Rebooting in 86400 seconds.. --- 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.